HSM Series Operator Manual
Contents
1. FIGURE 2 3 LOAD CONNECTION METHOD LOCAL ERROR SENSING HSMSERIES OPR 082115 2 7 2 7 5 2 LOAD CONNECTION METHOD II REMOTE ERROR SENSING If the load is located at a distance from the power supply terminals or if reactive and or modu lated loads are present remote error sensing should be used to minimize their effect on the volt age stabilization A twisted shielded pair of wires from the sensing terminals directly to the load will compensate for voltage drops in the load interconnection scheme see Specifications for available headroom based on model the termination point of the error sensing leads should be at or as close as practical to the load For these conditions it is also recommended that some amount of local decoupling capacitance be placed at the error sense termination point to mini mize the risk of unwanted pick up affecting the remote error sense function See Figure 2 4 4 TJ FIGURE 2 4 LOAD CONNECTION METHOD REMOTE ERROR SENSING 2 8 HSMSERIES OPR 082115 27 5 3 LOAD CONNECTION METHOD SERIES CONNECTION Units may be connected in series to obtain higher output voltages Each power supply in the series should be protected by a clamping diode connected in its non conducting direction in par allel with th2. CLOSE SWITCH TO INHIBIT E e0000 00000 08e oo 000 o KE TWIST mM N A OPERATION AS AN ALTERNATIVE TO THE ABOVE CONFIGURATION A HIGH LOGIC LEVEL CAN BE USED RIVE RC2 AS LONG AS THE RETURN FROM THE EXTERNAL POWER SUPPLY IS CONNECTED AUXRIN IN EITHER CASE SWITCH CAN BE A RELAY CONTACT LOGIC GATE TRANSISTOR ETC JPERATED FROM OR REFERENCED TO THE SVAUX SUPPLY FIGURE 3 5 REMOTE INHIBIT CONTROL OPERATION An additional function which can be derived from the remote inhibit control circuitry is the ability to reset the overvoltage undervoltage latch circuitry without cycling the source power Remote Lockout Reset When this function is enabled via switch S1 1 the latch can be reset by toggling one of the inhibit control signals from enable to disable and back The main advantages of this remote reset function are the ability to reset the power supply from a remote location and an instantaneous reset time compared to the 30 second minimum waiting period imposed when cycling the source power for reset MODULE CURRENT MONITOR HSM power supplies provide a 0 5 5V analog signal named IMON accessed via I O connector pin 32 which duplicates the signal level of the load sharing feedback signal ISHARE gener ated by each HSM This permits the user to determine the load being provided by each module within a parallel or redundant power system configuration The IMON signal is current limit
3. POST 4 4 MINIMUM FEMALE THREA me ea 4 1 gt D 7 a 4 la 3 x A n BOTTOM VIEW FIGURE 1 3 OUTLINE DRAWING HSMSERIES OPR 082115 1 4 1 4 1 1 4 2 1 4 3 1 4 4 1 4 5 1 4 6 1 4 7 1 4 8 1 4 9 1 4 10 MISCELLANEOUS FEATURES CONTROL PROGRAMMING a VOLTAGE CHANNEL Output voltage is controlled continu ously throughout the specified adjustment range via a 10 turn potentiometer accessed through the top cover External control can be exercised either by resistance or by control voltage see PAR s 3 3 and 3 4 b CURRENT CHANNEL Output current is controlled continuously throughout the specified adjustment range via a 10 turn potentiometer accessed through the top cover External control can be exercised by control voltage see PAR s 3 5 and 3 6 c OVERVOLTAGE LEVEL The output voltage level at which the overvoltage protection latch is activated may be adjusted locally via a 10 turn potentiometer accessed through the top cover see PAR 3 8 d REMOTE INHIBIT Operation of the output regulator can be inhibited remotely via either one of two TTL level control lines RC1 and RC2 Both of these signals are isolated from both the input and output allowing single point c
4. Remote On Off Control Isolated TTL compatible signal either logic high or logic low will disable output Temperature Range O to 50 C rated load Operating 50 C to 71 derate by 2 5 C see Figure 1 2 Storage 40 to 85 Load Sharing Within 5 of load when connected via load sharing wire see PAR 2 7 6 Internal d c fan inlet exhaust as indicated in Load Monitor 0 5V analog signal proportional to output load current 5V at 100 of rated load POWER Indicates low source voltage signal asserted a minimum of 5 msec prior to loss of output voltage Status Flags Form C dry relay contacts See PAR 3 14 OUTPUT Indicates HSM Power Supply in normal operating mode See Notes 5 and 7 OVERTEMP Indicates HSM Power Supply in overtemperature shutdown FAN FAIL Indicates failure of internal cooling fan Auxiliary Voltage Isolated 4 75 5 25V d c output 0 100mA parallelable output isolated 500 V d c Input isolated SELV See Operating Instructions PAR 3 11 Cooling Figure 1 3 0 95 RH non condensing Operating and Humidity Storage Non operating 20g 11msec 50 half sine 3 Shock axes 3 shocks each axis 5 10Hz 10mm double amplitude Vibration 10 55Hz 29 Altitude Sea level to 10 000 feet PHYSICAL Dimensions See Figure 1 3 Weight 16 Ibs 7 3Kg Source Connections
5. Load Connection 3 pin power entry module compatible with IEC 320 C19 molded line cord plug Two bus bars and 1 0 x 0 125 inch copper w bright nickel finish Signal Connection 37 pin D subminiature connector male Voltage Set Programming Mode selected by internal switches See Note 6 See PAR 3 3 Current Limit NOTES 5 Status flags are isolated and operate independently 6 The POWER DCFAIL fault detector window tracks pro grammed output voltage however the overvoltage protection trip point remains unaffected 7 Form C contacts rated from 30V d c 1A to 60V d c 0 3A Programming Internal Multiturn pot External 1 Resistance 0 50KQ External 2 0 10V 500 max Internal Multiturn pot External 0 10V 500A max HSMSERIES OPR 082115 IENT TEMPERATURE FIGURE 1 2 TEMPERATURE DERATING FO CONNECTOR povu aged oe 21 AA LATE 1 THK SERIAL No i 2 INPUT AC rome ieee INSTRUCTION MANI 00 N ear AL 3003 H14 BACK PLATE IRIDITE GOLD PARENTHESES IN MILLIMETERS A gt Jie DUNTING HOLES 1 64 20 4 2 DIMENSIONS 1 32 0 8 pe THERWISE SPECIFIE REAR VIEW TOP VIEW
6. SECTION 3 OPERATING INSTRUCTIONS OPERATING CONFIGURATION The following subsections review the various features and indicate how to select and operate each function The default settings for each function indicate the as shipped status for standard HSM series power supplies Prior to applying source power the operating configuration of the HSM power supply must be selected This setup is performed via the multiposition configuration switches S1 S2 and S3 which are accessed via slots in the top cover see Figure 2 1 while the external control signals programming input and status output are accessed via the I O Con nector on the rear panel of the HSM power supply see Figure 2 2 HSM series power supplies incorporate several advanced features which expand their applica bility beyond that of simple voltage stabilizers These functions include both internal and exter nal programming of voltage and current regulation points remote error sensing active load sharing circuitry output overvoltage and undervoltage protection output current walk in in cir cuit voltage and current setpoint monitors and dual mode floating inhibit controls as well as Form C relay contact outputs indicating source output and fan status and overtemperature shutdown REMOTE ERROR SENSE All HSM power supplies are equipped with remote error sensing to compensate for the voltage drop inherent in any power supply load interconnection scheme The amount of
7. 3 4 Imax ISET This voltage represents the percentage of available power supply current as per centage of rated current with 10V corresponding to 100 available current is defined as the maximum current limit available based on the programming range see PAR 3 6 Unlike VSET ISET is always based on a 0 10V scale regardless of the range selected For example ISET or Imax 6 2V corresponds to 62 of the maximum pro grammable current for the low programming range this corresponds to 62 of the rated module current but for the high programming range the number is 62 of 110 or 68 2 of rated module current If the module is HSM 5 200 for example the pro grammed current limit is either 124A or 136 4A depending on the range selection Cur rent setpoint monitor accuracy is 5 OVERVOLTAGE PROTECTION ADJUSTMENT HSM power supplies incorporate output overvoltage protection OVP circuitry which latches the output regulator off in the event that the output voltage rises above a predetermined level Reset requires that the user remove source power for a minimum of 30 seconds optional remote reset is described in PAR 3 12 The trip level is preset at the factory for 130 of the nominal output voltage see Table 1 1 however this level can be adjusted from 100 to 140 of the nomi nal output except Model HSM 48 21 which can be adjusted from 100 to 160 of the nomi nal output via the OVP ADJUST control accessed through the
8. phosphor bronze etc to enhance conductivity for high current loads gt 100A Kepco recommends the use of Bellville style constant tension washers in place of conventional lockwashers NOTE REGARDLESS OF OUTPUT CONFIGURATION OUTPUT SENSE LINES MUST BE CONNECTED FOR OPERATION OBSERVE POLARITIES THE NEGATIVE SENSING WIRE MUST BE CONNECTED TO THE NEGATIVE LOAD WIRE AND THE POSITIVE SENSING WIRE TO THE POSITIVE LOAD WIRE HSMSERIES OPR 082115 2 7 5 1 LOAD CONNECTION METHOD I LOCAL ERROR SENSING The most basic power supply load interface is a 2 wire connection between the power supply output terminals and the load This connection method employs local error sensing which con sists of connecting the error sense leads directly to the power supply s output terminals Its main virtue is simplicity since voltage regulation is maintained at the power supply output the regula tion loop is essentially unaffected by the impedances presented by the load interconnection scheme The main disadvantage is that it cannot compensate for losses introduced by the inter connection scheme and therefore regulation degrades directly as a function of distance and load current The main applications for this method are for powering primarily resistive and rela tively constant loads located close to the power supply or for loads requiring stabilized current exclusively The load leads should be tightly twisted to reduce pick up See Figure 2 3
9. that all applicable local codes for source power wiring are met HSMSERIES OPR 082115 2 7 3 2 7 4 WARNING IT IS IMPERATIVE THAT THE USER PROVIDE ALL THREE SOURCE WIRE CONNECTIONS AS THIS CONNECTION IS THE SAFETY GROUND PROVISION The user wired mating connector requires size 14 AWG minimum conductors for all three connections D C OUTPUT GROUNDING Connections between the power supply and the load and sensing connections may despite all precautions such as shielding twisting of wire pairs etc be influenced by radiated noise or pick up To minimize the effects of this radiated noise the user should consider grounding one side of the power supply load circuit The success of d c grounding requires careful analysis of each specific application however and this recommendation can only serve as a general guide line One of the most important considerations in establishing a successful grounding scheme is to avoid GROUND LOOPS Ground loops are created when two or more points are grounded at different physical locations along the output circuit Due to the interconnection impedance between the separated grounding points a difference voltage and resultant current flow is superimposed on the load The effect of this ground loop can be anything from an undesirable increase in output noise to disruption of power supply and or load operation The only way to avoid ground loops is to ensure that the entire output load c
10. 19 error sense and 37 error sense Two wires terminated ASSEMBLIES in ring lugs are provided or terror sense connections Simplifies I O connections for three units in parallel Provides connections between three I O 118 1095 connectors pins 14 current share 19 error sense 37 error sense Two wires termi nated in ring lugs are provided for error sense connections Item quantity 1 supplied with unit 1 6 HSMSERIES OPR 082115 SECTION 2 INSTALLATION 2 1 UNPACKING AND INSPECTION This instrument has been thoroughly inspected and tested prior to packing and is ready for operation After careful unpacking inspect for shipping damage before attempting to operate Perform the preliminary operational check as outlined in PAR 2 5 If any indication of damage is found file an immediate claim with the responsible transport service 2 2 TERMINATIONS AND CONTROLS a Output and Configuration Controls Refer to Figure 2 1 and Table 2 1 b Rear Panel Refer to Figure 2 2 and Table 2 2 ADJUST 0 ht a 2 4 NOTE SWITCHES SHOWN IN DEFAULT POSITION FIGURE 2 1 HSM SERIES OUTPUT CONTROLS AND CONFIGURATION SWITCH FUNCTIONS TABLE 2 1 CONFIGURATION CONTROLS FUNCTION REF PAR 51 1 REMOTE LOCKOUT RESET 3 12 51 2 CURRENT WALK IN 3 10 5
11. DVM measure the voltage across I O connector pins 33 and 19 this voltage is factory adjusted to 10 0V and corresponds to 100 of maximum current see PAR 3 7 If necessary readjust to 10 0V using the trim pot labeled Imax accessed through the top cover if desired readjust for lower current limit see PAR 3 7 HSMSERIES OPR 082115 2 3 2 6 2 7 2 7 1 2 7 2 2 4 7 Disconnect sense lines with power supply still operating either by removing the mating connector or by manually opening the sense line connected to Pin 37 verify that the power supply output turns off NOTE At no load the output voltage will drop slowly 8 Remove source power for 30 seconds or until fan stops turning Reconnect the sense lines reapply source power verify that the output voltage returns to the value measured in step 5 above 9 Remove source power connection INSTALLATION Refer to Figure 1 3 Outline Drawing The HSM power supply is designed to be operated in fixed installation applications Attach the HSM power supply to the mounting surface using the four holes in the bottom of the chassis sur rounded by plastic grommets For all installations provide adequate clearance around air inlet and exhaust locations and ensure that the temperature immediately surrounding the unit and especially near the air inlets does not exceed the maximum specified ambient temperature for the operating conditions WIRING INSTRUCTIONS Interco
12. E ai de li 3 9 3 14 3 OVERTEMP Status Flags ei ea cea eee Ca a eed cetati 3 10 3 14 4 FANFAIL Status Flags 3 10 LIST OF FIGURES FIGURE PAGE 1 1 HSM S ries Power Supply ic isa heh ete he hie et ee des Mie dat ee a Se ee a pata iv 1 2 Temperature Derating 1 3 Outline Drawing 2 1 HSM Series Output Controls and Configuration Switch FUNCTIONS 2 2 0 0 0 2 1 2 2 HSM Series Rear Panel Connections men neam 2 2 2 3 Connection Method Local Error Sensing cecceesceseceeeeeeeeeeeeeeseeeecaeeeeeseaeeseeseeeseaeesieeesaneaeenaes 2 7 2 4 Load Connection Method Remote Error 1 1 100000 eee nana maneaua 2 8 2 5 Load Connection Method III Series 2 9 2 6 Load Connection Method IV Parallel Redundant Operation wit Hot 2 10 3 1 External Resistance Programming of Output 00 nenea nene 3 2 3 2 External Voltage Programming of Output Voltage mm nenea nenea nana manea 3 2 3 3 External Voltage Programming of Current Limit nenea nenea nana eee 3 3 3 4 Current Walk In Characteristic 101110 0 nenea eee aan aaa ne na 3
13. Specificatlonses ste e thee ahi Lee A Ea da Pa ia a au at aa tk ot a ae Sa a 1 1 1 4 Miscellaneous Features 2 42244 0 1 5 1 4 1 aia area te eee 1 5 1 4 2 Status Flags san hints d ear 1 5 1 4 3 Setpoint MORONS sence sede Sei ened elit depen diets 1 5 1 4 4 Remote Error Sensing eli ial a da a au aa 1 5 1 4 5 ia t 1 5 1 4 6 1 5 147 1 5 1 4 8 Overcurrent undervoltage Protection men nenea nana emana nana nana na 1 5 1 4 9 AP 1 5 1 410 Remote Reset a E a ee eee 1 5 1 5 aici deasa a A Oa a a e 1 6 1 5 1 Battery Charger B Sutfix ies cae oaia ata a a ein a a ia avi Hee en ees 1 6 1 6 ACCESSONIOS tv as aia i alta d ee ee pa d d aa 1 6 SECTION 2 INSTALLATION 2 1 Unpacking and NSPA O la ana oa a i RE at al aa ata ta 2 1 2 2 Terminations and Control sink siete at n a a a
14. limit is equal to the rated output current l for all models since the programming voltage range does not change the resolution for a given programming input increment increases by 10 SETPOINT MONITORS HSM power supplies provide measurement ports which permit the user to verify the pro grammed output voltage and current limit points while the power supply is in an active circuit and even when operated in a parallel redundant configuration These setpoint monitors access the voltage and current loop reference sources to determine the programmed values and con vert these reference levels to proportional voltages readable by the user As the quantities mea sured are control circuit setpoints and not actual output measurements the external operating conditions do not influence these measurements and they remain valid even when the power supply output is disabled only valid source power is required The setpoints are available at the I O connector the test points are labeled VSET and ISET and are available at pins 36 and 33 respectively with circuit return accessed at pin 19 S see Fig ure 2 2 HSMSERIES OPR 082115 3 3 3 8 3 4 Measurement quantities are defined as follows Vo VSET This voltage represents 1 10 of the programmed output voltage As an example VSET or Vo 4 63V corresponds to a programmed output voltage of 46 3V 1 This relationship is constant regardless of the programming range selected see PAR
15. via an external resistance or potentiometer 0 50Kohm connected between pins 17 and 35 VRP1 VRP2 of the I O connector see Figure 3 1 This technique is useful for applications where the voltage output of the power supply must be locked to a preset value without means of adjustment security or where the voltage output of the power supply must be remotely adjusted after installation convenience HSMSERIES OPR 082115 3 1 3 4 3 5 3 2 c External Voltage Programming When enabled via S2 3 this mode provides for output voltage adjustment via an external voltage source 0 10V connected between pins 18 and 19 VPROG S of the I O connector see Figure 3 2 This technique is useful when imple menting digital control of the power supply output voltage via a D A converter Kepco s SN SNR 488 programmers are ideally suited to these requirements N m OFF m rP CONNECTOR O 50K OHM RESISTORS LPF FIXED OR VARIABLE TWIST FIGURE 3 1 EXTERNAL RESISTANCE PROGRAMMING OF OUTPUT VOLTAGE TO PIN 18 7 2 CONNECT LOW RANGE SELECT lt FIGURE 3 2 EXTERNAL VOLTAGE PROGRAMMING OF OUTPUT VOLTAGE OUTPUT VOLTAGE RANGE The user may select the maximum programmable voltage either high or low range via S2 switch positions 1 and 2 see Figure 2 1 This permits the user to trade adjustment range for programming resolution this is especially useful
16. when used in conjunction with external voltage programming see PAR 3 3 for precise output adjustment 0 2 or for limiting the maximum programmable voltage Operation of range selector is as follows a High Range This is the factory set default mode the maximum programmable output volt age is 110 of nominal VO for 3 3V through 28V models 125 of nominal VO for 48V model b Low Range When enabled via S2 1 2 the maximum programmable output voltage is equal to the nominal output voltage Vo for all models since the programming resistance and volt age ranges do not change the resolution for a given programming input increment increases by 10 for 3 3V through 28V models and by 25 for 48V model NOTE When setting the programming range both S2 1 and S2 2 must be set to the same position otherwise the fault detector voltage window will be offset from the program ming value and will not operate properly CURRENT LIMIT PROGRAMMING HSM power supplies provide two different methods for programming the output current limit point internal and external voltage When using internal programming the minimum program mable current limit is 50 60 of nominal while external voltage programming permits adjust HSMSERIES OPR 082115 3 6 3 7 898 ment down to near zero The programming method is selected via S3 switch positions 2 and 3 as follows NOTE One programming mode must be selected or the HSM current limit programs t
17. 1 3 UNDERVOLTAGE LOCKOUT 3 9 52 1 RANGE SELECT VOLTAGE LOOP 3 4 2 2 RANGE SELECT FAULT DETECTOR 3 4 2 3 EXT VOLT PROG VOLTAGE LOOP 3 3 52 4 EXT RES PROG VOLTAGE LOOP 3 3 52 5 INT PROG VOLTAGE LOOP 3 3 53 1 RANGE SELECT CURRENT LOOP 3 6 3 2 EXT VOLT PROG CURRENT LOOP 3 5 53 3 INT PROG CURRENT LOOP 3 5 HSMSERIES OPR 082115 2 1 SEE TION 2 OUTPUT 25 IODEL No HSM ERIAL No UTPUT ID INPUT 20 22072407250 59 60 Ha 8 10 7 58 5 8 9 1 SEE INSTRUCTION MANUAI Curu A ER_INLE a LINE HOT NEUTRAL FIGURE 2 2 HSM SERIES REAR PANEL CONNECTIONS TABLE 2 2 CONNECTOR PIN ASSIGNMENTS SEE SECTION 2 NEC PIN NO NAME DESCRIPTION OF FUNCTION REF PAR 1 X NO CONNECTION 2 X NO CONNECTION 3 FFS 1 FAN STATUS NORMALLY CLOSED CONTACT 3 14 4 ACS C SOURCE POWER STATUS COMMON CONTACT 3 14 5 ACS 2 SOURCE POWER STATUS NORMALLY CLOSED CONTACT 3 14 6 X NO CONNECTION SEE NOTE 1 7 RC2 REMOTE INHIBIT NORMALLY LOW INPUT SEE NOTE 2 3 12 8 RC1 REMOTE INHIBIT NORMALLY HIGH INPUT SEE NOTE 2 3 12 9 X NO CONNECTION SEE NOTE 1 0 x NO CONNECTION 1 OTS C OVERTEMP STATUS COMMON CONTACT 3 14 2 55 OUTPUT STATUS COMMON CONTACT 3 14 3 P
18. 2 60 45 28 6 20 60 120 77 HSM 28 53 28 5 6 30 8 36 4 53 39 8 25 2 20 60 140 78 3 HSM 48 30 48 9 6 59 2 62 4 30 22 5 14 3 20 60 240 80 Model efficiency is typically 2 3 lower HSMSERIES OPR 082115 1 1 TABLE 1 2 GENERAL SPECIFICATIONS CHARACTERISTIC REQUIREMENT CHARACTERISTIC REQUIREMENT Source Voltage SOURCE INPUT OUTPUT LOAD AC Single Phase Nominal Voltage See Table 1 1 1000W 1500W Nominal 100 250V rms 200 250 rms Rated Current See Table 1 1 Range 90 277Vrms 180 277V rms DC 125 420V d c polarity insensitive Brownout Voltage 1000W 75 V a c typ 1500W 150 V a c typ Minimum Output Current Output Voltage Range 2 of rated load lower output conditions may result in increased output ripple and increased transient response recovery time See Table 1 1 Source Frequency 47 440 Hz Frequencies in excess of 63Hz will cause leakage current to exceed limits specified below Current 120V a c 11A rms max 1000W 5 5A rms max 240V 1500W 8 0A rms max Power Factor 0 99 typical 0 96 minimum for all source conditions and loads from 25 to 100 of Regulation Error 0 1 over full source Source Effect voltage range 0 1 from 5 to 100 of Load Effect rated load Temperature 0 02 0 C lt TA lt 50 Effect Time Effect 0 1 24 hr perio
19. 6 3 5 Remote Inhibit Control 3 7 3 6 Timing Diagram for POWER DCFAIL Status nenea nana nana nana nana 3 9 LIST OF TABLES TABLE PAGE 1 1 Model Parameters i eat cc a i ate aa e aa a Da he ie a s dat 1 1 1 2 General SpecificationS a i e c cea otet caca a i a tr a Ba a aa 1 2 1 3 5 aa gi cea ta da c meta etala seein ata aa eee ee ely 1 6 2 1 Configuration Controls sis cei tat i ia i ae da den i ag i DA ci aei 2 1 2 2 V O Connector Pin Assignments m session caca a e d a a a a a a a d e i 2 2 3 1 Status Flags isi strate i ti ia a a de a ua aa O Ta Da af Ra a Pa 3 8 3 2 Fault Detector Opera 2 i a a d e 3 10 i HSM OPR 082115 FIGURE 1 1 HSM SERIES POWER SUPPLY iii Blank iv HSMSERIES OPR 082115 1 1 1 2 1 3 SECTION INTRODUCTION SCOPE OF MANUAL This manual contains instructions for the installation and operation of the HSM series of voltage and current stabilized d c power supplies manufactured by Kepco Inc Flushing New York U S A GENERAL DESCRIPTION The HSM power supply is basically a voltage and current stabilized d c source with a relatively sharp crossover between voltage and current mode operation This permits HSMs to be used both as conv
20. ATUS NO OPEN CLOSED CLOSED OUTPUT STATUS NC CLOSED OPEN OPEN OUTPUT STATUS OUTPUT STATUS NO OPEN CLOSED CLOSED FAN STATUS NC CLOSED OPEN CLOSED FAN STATUS FAN STATUS NO OPEN CLOSED OPEN OVERTEMPERATURE OVERTEMP STATUS NC CLOSED OPEN CLOSED STATUS OVERTEMP STATUS NO OPEN CLOSED OPEN NORMAL IS DEFINED AS THE HSM POWERED AND OPERATING WITH NO FAULTS SOURCE POWER WITHIN SPECIFICATIONS OUTPUT POWER WITHIN RATED LIMITS FAN OPERATING AND NO OVERTEMPERATURE CON DITION SENSED CLOSED AND OPEN ARE REFERENCED TO THE ASSOCIATED STATUS COMMON TERMINATION NOTE UPON INITIAL TURN ON FAN AND OVERTEMPERATURE STATUS LINES WILL BE IN NORMAL CONDITION UNLESS A FAULT CONDITION IS SENSED 3 14 1 SOURCE POWER STATUS FLAGS 3 8 Monitors available source voltage to determine if sufficient energy is available to sustain rated output for normal operation These signals indicate a fault condition until the bulk voltage is greater than 390V d c Once the bulk voltage reaches 390V d c indicating that the PFC boost converter is operating and assuring that full ride through time is available at rated load these signals revert to normal see Table 3 1 These signals will indicate a fault a minimum of 5 mil liseconds prior to loss of output regulation due to source power loss providing a transparent source power ride through time of 21 5 milliseconds POWER STATUS is not reset until the bulk d c again reaches 390V d c see Figure 3 6 for timing relati
21. CTIONS The I O Signal Connector located on the rear panel of the HSM power supply see Figure 2 2 provides access for all programming inputs and status signal outputs These signals provide the user access to portions of the regulation control circuitry of the HSM and as such must be pro tected from radiated and conducted noise as well as from physical contact with non valid driving sources The following subsections address specific programming signal applications in gen eral however when accessing this connector from distant locations or high noise environments it is recommended that a shielded cable be used with the shield terminated to the system s sin gle point ground a Remote Error Sense Twist positive and negative error sensing lines pins 37 19 together especially when a sig nificant distance separates the power supply and load 2 External Voltage Programming Voltage or Current Twist the programming signal line s pins 18 15 or both 18 and 15 with negative error sensing line pin 19 use shielded cable if possible c External Resistance Programming Voltage Twist both programming lines pins 17 35 together use shielded cable if possible 2 Remote Inhibit Controls RC1 RC2 Twist either or both programming lines pins 7 8 together with AUXRTN pin 25 if 5VAUX is used to power the external inhibit control circuitry include 5VAUX line pin 26 in twist HSMSERIES OPR 082115 3 1 3 2 3 3
22. ION 3 OPERATING INSTRUCTIONS 3 1 Operating Configuration ie ceai i aa ta a d d hl die a ai Data 3 1 3 2 Remote Error Sense aiid a ad Es ca E Sta A aaa 3 1 3 3 Output Voltage Programming sssri eta ca aaa ea serie Lana a a a 3 1 3 4 Output Voltage Range pai Et Dc i i a Ai ate 3 2 3 5 Current Limit Programming a as tal Ra i ao e a tu ta 3 2 3 6 Current Limit 3 3 3 7 Seip MON O S e ceia c ata cai oa a d a oa CA ea a a a at a se 3 3 3 8 Overvoltage Protection nana na nana na 3 4 3 9 GCurrent Limit Ghatacteristic ccs c ci ce do at a a al da pt eee daia 3 5 3 10 Current ea aa a ai a RR a aa DER 3 6 3 11 5VAUX Floating Supply ze knr aa nade n a a i d a at CR a a a a ea a 3 6 3 12 Remote Inhibit Remote Reset Controls mean nene eee nana 3 7 HSM OPR 082115 TABLE OF CONTENTS SECTION PAGE 3 13 Module Current Monitor see ec indeed ta e desl Miata ada tata 3 7 3 14 Status 3 8 3 14 1 source Power Status Flags aed ed a i 3 8 3 14 2 5 808 2 r ati aaa pa
23. NHIBIT REMOTE RESET CONTROLS HSM power supplies incorporate two TTL level inputs RC1 and RC2 accessed via the I O con nector which can be used to disable the output regulator via external stimulus These two con trols operate from an internal 5V supply 5VAUX which is isolated from both input and output see PAR 3 11 creating a floating inhibit control circuit which allows the user to control sev eral HSM power supplies operating at different return potentials from a single source The two control lines differ in that RC1 pin 8 is normally high initiating an output inhibit with application of a low signal level while RC2 pin 7 is normally low and requires application of a high level signal to inhibit the output both of these signals are applied with respect to AUXRTN see Fig ure 3 5 and can be operated at potentials as much as 500V from the HSM output s These two signal levels are TTL compatible both for voltage levels and source sink capability If not actively driven these signals have no effect on power supply operation Activation of either one of these control lines results in an immediate shutdown of the output PWM regulator includ ing reset of the soft start undervoltage and current walk in circuits Operation is inhibited until the appropriate control line is released whereupon the power supply output restarts as from ini tial cold turn on TWIST OPERATION A
24. OPERATOR S MANUAL HSM SERIES 1000 AND 1500 WATT SWITCHING POWER SUPPLY VOLTAGE CURRENT STABILIZED DC SOURCE KEPCO INC MODEL An ISO 9001 Company HSM SERIES POWER SUPPLY IMPORTANT NOTES 1 This manual is valid for the following Model and associated serial numbers MODEL SERIAL NO REV NO 2 A Change Page may be included at the end of the manual All applicable changes and revision number changes are documented with reference to the equipment serial num bers Before using this Instruction Manual check your equipment serial number to identify your model If in doubt contact your nearest Kepco Representative or the Kepco Docu mentation Office in New York 718 461 7000 requesting the correct revision for your par ticular model and serial number 3 The contents of this manual are protected by copyright Reproduction of any part can be made only with the specific written permission of Kepco Inc Data subject to change without notice re 243 0850 THE POWER SUPPLIER KEPCO INC e 131 38 SANFORD AVENUE e FLUSHING NY 11355 U S A e TEL 718 461 7000 e FAX 718 767 1102 email hg kepcopower com e World Wide Web http www kepcopower com TABLE OF CONTENTS SECTION PAGE SECTION 1 INTRODUCTION 1 1 Scope of Avie a Sa a cat aa 2 a al E i aa 1 1 1 2 General Description 22 ele Rata Data Eleea i aa aia A A Eat Ba ce 1 1 1 3
25. SOURCE POWER REQUIREMENTS This power supply will operate with the installed fuse from single phase a c mains power over the specified voltage and frequency ranges without adjustment or modification Operation from d c power is also available please contact factory for limitations imposed when using d c source power COOLING The power devices used within the HSM power supply are maintained within their operating temperature range by means of internal heat sink assemblies cooled by an internal cooling fan The cooling method utilizes pressurization rather than evacuation resulting in greater cooling efficiency and reduced contaminant collection within the enclosure ALL INLET AND EXHAUST OPENINGS AROUND THE POWER SUPPLY CASE MUST BE KEPT CLEAR OF OBSTRUC TION TO ENSURE PROPER AIR ENTRY AND EXHAUST Periodic cleaning of the power sup ply interior is recommended If the power supply is rack mounted or installed within a confined space care must be taken that the ambient temperature which is the temperature of the air immediately surrounding the power supply does not rise above the specified limits for the oper ating load conditions see PAR 1 3 and Figure 1 2 PRELIMINARY OPERATIONAL CHECK A simple operational check after unpacking and before equipment installation is advisable to ascertain whether the power supply has suffered damage resulting from shipping Refer to Fig ures 2 1 and 2 2 for location of operating controls and electrical c
26. SS 2 OUTPUT STATUS NORMALLY CLOSED CONTACT 3 14 4 ISHARE LOAD SHARE SIGNAL BUS 0 5 5V SEE NOTE 3 2 7 6 5 IPROG ANALOG PROGRAMMING INPUT CURRENT 0 10V SEE NOTE 3 3 5 6 x NO CONNECTION 7 VRP 1 RESISTIVE PROGRAMMING INPUT 0 10 3 3 8 VPROG ANALOG PROGRAMMING INPUT VOLTAGE 0 10V SEE NOTE 3 3 3 9 5 NEGATIVE ERROR SENSE INPUT 2 7 5 20 x NO CONNECTION 21 FFS 2 FAN STATUS NORMALLY OPEN CONTACT 3 14 22 FFS C FAN STATUS COMMON CONTACT 3 14 23 ACS 1 SOURCE POWER STATUS NORMALLY OPEN CONTACT 3 14 24 x NO CONNECTION SEE NOTE 1 25 AUXRTN AUXILIARY SUPPLY RETURN SEE NOTE 2 3 11 26 5VAUX AUXILIARY SUPPLY OUTPUT 3 11 27 x NO CONNECTION SEE NOTE 1 28 x NO CONNECTION 29 OTS 2 OVERTEMP STATUS NORMALLY OPEN CONTACT 3 14 30 OTS 1 OVERTEMP STATUS NORMALLY CLOSED CONTACT 3 14 31 PSS 1 OUTPUT STATUS NORMALLY OPEN CONTACT 3 14 32 IMON ANALOG OUTPUT CURRENT MONITOR 0 5 5V SEE NOTE 3 3 13 33 ISET CURRENT LIMIT SETPOINT MONITOR 0 10V SEE NOTE 3 3 7 34 x NO CONNECTION 35 VRP2 RESISTIVE PROGRAMMING INPUT VOLTAGE 0 10 3 3 36 VSET OUTPUT VOLTAGE SETPOINT MONITOR 0 10V SEE NOTE 3 3 7 37 S POSITIVE ERROR SENSE INPUT 2 7 5 NOTES 1 THESE PINS ARE LEFT BLANK TO PROVIDE VOLTAGE ISOLATION BETWEEN OUTPUT AND 5V AUX SUPPLY WHICH POWERS THE REMOTE INHIBIT CONTROL CIRCUITRY 2 THESE SIGNALS ARE REFERENCED TO AUXRIN PIN 25 3 THESE SIGNALS ARE REFERENCED TO S PIN 19 HSMSERIES OPR 082115 2 3 2 4 2 5
27. ated with a signal from the fault detector circuit to produce a selective overvoltage shutdown function which prevents shutdown of operational power supplies in a parallel redundant power system configuration The OVP latches of any working power supplies are disabled allowing only the faulty modules to be latched off system operation can then return to normal assuming sufficient load capacity in the remaining modules to support the load This function is critical in fault tolerant power systems otherwise a single overvoltage failure could ripple through all of the operating supplies and result in a complete power system loss NOTE The overvoltage protection circuit senses the voltage directly at the output terminals of the power supply not at the error sensing point When selecting an overvoltage set point the user must take into account the expected power lead voltage drop and if applicable the transient response overshoot in order to avoid false shutdowns The HSM design is such that the power supply cannot generate an output voltage high enough to cause internal damage regardless of OVP setting CURRENT LIMIT CHARACTERISTIC HSM power supplies provide two different current limiting modes for different applications selection of the desired mode is accomplished via switch 51 3 accessed through the top cover of the HSM see Figure 2 1 The following describes the operational differences and selection method of each a Continuous Limiti
28. compensation varies based on output voltage 3 3V and models compensate up to 0 25V drop in each power lead 0 5V total while 12V through 48V models provide for up to 0 8V drop in each lead 1 6V total The remote error sense leads must be connected to the output power termi nations either locally at the power supply output terminals or remotely at the load termi nations using the correct polarity for the HSM to operate properly See Figures 2 3 through 2 6 OUTPUT VOLTAGE PROGRAMMING HSM power supplies provide three different methods for programming the output voltage regu lation point internal external resistance and external voltage When using either internal or external resistance programming the minimum programmable voltage is 50 60 of nominal while external voltage programming permits adjustment down to zero Performance specifica tions are only guaranteed over the range shown in Table 1 1 The programming method is selected via S2 switch positions 3 4 and 5 as follows NOTE One programming mode must be selected or the HSM output voltage programs to zero never select more than one programming mode at a time a Internal Programming This is the factory set default mode see Figure 2 1 when enabled via S2 5 the output voltage is adjusted via the internal potentiometer labeled see Figure 2 1 b External Resistance Programming When enabled via S2 4 this mode provides for output voltage adjustment
29. d after 30 Drift min warmup Combined Effect 0 3 Ripple and Noise See Table 1 1 Start up Time 1 sec maximum at rated output current rated load Inrush Current 75A max Efficiency See Table 1 1 3000V rms Input to Output Meni e 1500V rms Input to Case 500V d c Output to Case Leakage Current lt 0 50 115V a c 47 63Hz Output Hold up Time 21 5 msec transparent power loss no indication 5 msec following power loss indication gt 27 msec total time prior to loss of output regulation lt 1 0 230 47 63Hz Safety Agency Approvals UL Recognized SELV UL 1950 UL1459 Para 35A 1 Turn on Turn off Over shoot Within load transient response envelope CSA Certified SELV CSA 22 2 No 234 M90 Level 5 Immunity See Note 3 Radiated RF Ampl Mod ENV50140 10V m 80 1000MHz Radiated RF Pulse Mod ENV50204 Pulse 10V m 900 2 Load Transient Response 25 load transient 2A usec rise fall time Output Polarity Maximum 3 of nominal output excursion voltage 100msec return to within 1 of Recovery time set voltage All outputs are floating and can be referenced as required by the user at up to 500V d c PROTECTION Magnetic Field EN 61000 4 8 30A m 50Hz Input Fusing Internal fuse hot line only not operator serviceable refer to Service Manual Electro
30. e F UNIT 5 5 BLOCKING DIODES MAY BE LOCATED IN EITHER POSITIVE OR NEGATIVE POWER LEAD OBSERVE PER DIODE POLARITY LOAD CONNECTION METHOD IV PARALLEL REDUNDANT OPERATION WIT HOT SWAP HSMSERIES OPR 082115 2 7 6 LOAD SHARING When operating two or more power supplies in parallel either for capacity or redundancy it is desirable to distribute the load equally among all of the power supplies in order to improve perfor mance reduce stress and increase reliability HSM power supplies incorporate active circuitry which forces multiple power supplies wired in parallel to share load current both in voltage and current mode regulation The HSM employs a single wire connection between paralleled power supplies forming a master slave relationship as follows the highest voltage unit becomes the master and all of the remaining units are slaved to it via the load share signal ISHARE which boosts the slave outputs in order to increase load share A maximum boost limit of 5 prevents the slave units from following a defective master into an overvoltage condition or from creating a load hazard if either the slave itself or the load sharing system is defective When implementing load sharing the user must ensure that all power supplies are attempting to regulate to the same voltage at the same location and must minimize the possibility of load share signal corruption the power supplies should as nearly as possible emula
31. e diode required for each power supply See PAR 2 7 5 3 May also be used as optional external blocking diode for redundant applications See 2 7 5 4 DIODES Used with HSM 3 3V 5V 12V and 15V models when wired for series operation User must pro 124 0601 vide wiring and heat sink One diode required for each power supply See PAR 2 7 5 3 May also be used as optional external blocking diode for redundant applications See PAR 2 7 5 4 142 0422 I O connector mating plug 142 0381 Source power inlet connector mating plug IEC 320 C19 CONNECTORS 118 0776 North American linecord set NEMA 5 20P to IEC 320 C19 108 0294 I O connector backshell 108 0203 I O connector jackposts set of two 219 0240 Standard Kit consists of North American linecord set I O connector mating plug I O connec FIXED tor backshell I O connector jackposts and screws for fixed mounting INSTALLATION KIT Customer wired Same as Standard Kit Part No 219 240 except linecord is replaced with 219 0249 P user wired power inlet mating plug SCREW 101 0159 Used for fixed mounting of HSM Power Supply 6 20 0 625 in long 118 0974 Mates with I O connector Provides connection between pins 19 sense and 37 error sense to two wires terminated in ring lugs for error sense connections Simplifies I O connections for two units in parallel Provides connections between two I O con CABLE 118 1133 nectors pins 14 current share
32. e output this diode protects the power supply outputs against secondary effects in the event of a load short Note that this is NOT the same as the blocking diode used for parallel redundant operation Selection of the clamping diode is entirely dependent upon output volt age current parameters The clamping diode must be rated for the maximum voltage and cur rent of the series connection Several clamping diodes in parallel may be required to meet the total current rating The user must also respect the 500V d c maximum isolation from output to chassis when determining the maximum series voltage Figure 2 5 shows a series connection of two HSM power supplies a PI 5 CLA ING DIODE Eat RCE k LOA KEEP INTERCONNECTING IRE AS SHORT AS POSSIBLE FIGURE 2 5 LOAD CONNECTION METHOD III SERIES CONNECTION HSMSERIES OPR 082115 2 9 2 7 5 4 LOAD CONNECTION METHOD IV PARALLEL REDUNDANT OPERATION Identical HSM power supply models may be connected in parallel in order to provided increased output current to a common load see Figure 2 6 This permits the user to obtain significantly higher load ratings than for a single HSM power supply The number of power supplies required is determined by dividing the required load c
33. ed HSMSERIES OPR 082115 3 7 3 14 and isolated from the ISHARE signal so that it cannot affect the load share function if shorted The voltage level of this signal is generated with respect to the negative sense return pin 19 STATUS FLAGS HSM power supplies provide electrical indication of the status of various critical functions includ ing source power status output status fan status and overtemperature condition Signal indi cation is obtained via four sets of Form C dry relay contacts accessed via the I O connector all three contacts are provided to the user permitting the selection of either normally open NO normally closed NC or both for any application refer to Table 2 2 The definition of normal in this instance refers to the status of the contacts when the HSM is powered and operating nor mally no fault status flag outputs remain valid even when source power is removed These relay contacts are SELV and are isolated from each other and from the output by 100V d c to permit flexibility in application A description of the function of each status signal follows Table 3 1 indicates the condition of status flags and indicators for normal fault and no power condi tions TABLE 3 1 STATUS FLAGS STATUS CONDITION SIGNAL NO POWER NORMAL FAULT DETECTED paige SOURCE POWER STATUS CLOSED OPEN OPEN STATUS SOURCE POWER ST
34. entional regulated voltage sources and in applications such as battery chargers where automatic crossover between constant voltage and constant current operation is required HSM power supplies are supplied in a single mechanical size and are nominally rated at either 1000 or 1500 watts of output power HSM 1000 watt power supplies are designed to operate over the universal a c power mains voltage range of 90 277V 47 63Hz with operation from 125 420V d c also available HSM 1500 watt products provide full power over the a c mains range of 180 277V a c with output power derating linearly to 1000 watts as a c mains voltage drops from 180 to 90V a c Active power factor correction circuitry limits source current harmon ics to negligible levels significantly improving source power utilization Cooling is provided via an internal d c fan The HSM permits adjustment of both output voltage VO and current limit IMAX either by internal pot or external resistance or voltage methods programming method is selected via DIP switches accessed through the top of the unit Independent circuitry provides protection against overvoltage overcurrent and overtemperature failures fault detection circuitry monitors performance of the output and critical internal functions providing both visual and electrical indi cators switch selectable current walk in circuit and optional float equalize functions enhance the performance of HSM power supplies for
35. he method of interface between the power supply output and the load must therefore take into account not only size with regard to minimum voltage drop but configuration with regard to minimizing the impedance introduced by practical interconnection techniques wire bus bars etc The series inductance of the load wire must be as small as possible as compared to the source inductance of the power supply error sensing cannot compensate for reactive effects due to this These dynamic conditions are especially important if the load is constantly modulated or step programmed or has primarily reactive characteristics or where the dynamic output response of the power sup ply is critical to load performance LOAD CONNECTION GENERAL Load connections to the HSM power supply are achieved via the bus bars protruding from the rear panel The bus bars are each provided with two holes one 0 34 diameter clearance hole for he UNC threaded fastener and one 10 32 threaded hole see Figure 1 3 The threaded hole is provided for attachment of error sensing leads from the signal connector when local sense mode is desired Load cable or bus bar attachment should use the clearance hole using a 5 6 UNC nut bolt and lockwasher The use of the proper fastener size and inclusion of a lockwasher are critical to maintaining intimate contact between the load conductor and output bus bar Kepco recom mends the use of fasteners made of conductive material brass
36. i a a a a a a a au a d i aaa 2 1 2 3 Source Power Requirements nenea nana nana nenea nenea nana 2 3 2 4 sa e d teats dau 2 3 2 5 Preliminary Operational Check men nenea eee nenea ea 2 3 2 6 InStallation d ea at i ale di 2 4 2 7 Wiring Instruc ions sia a pg a Dat 2 4 2 7 1 e cei aia Aaaa ata a bi ad oe dit bbe 2 4 2 7 2 Source Power Connections caii aia oa a d ic ta a ra aa ada aa 2 4 2 7 3 D G Output Grounding aha 2 5 2 7 4 Power Supply Load Interfaces a c e a a aa 2 5 2 7 5 Load Connection Generali x sczzic ze atu cal a EA a AAE cad aa aia 2 6 2 7 5 1 Load Connection Method Local Error 2 2 7 2 7 5 2 Load Connection Method II Remote Error 2 8 2 7 5 3 Load Connection Method III Series nenea nenea nare 2 9 2 7 5 4 Load Connection Method IV Parallel Redundant Operation 2 10 2 7 6 load Shagreen aa Ai a a DZ eae 2 11 2 7 7 Signal Gonnections 5 Siete at t Da e aa aa a A SR 2 12 SECT
37. inates the danger of overheating and damage to the load and load wiring due to continuous exposure to high current this is especially useful in redundant power systems where the continuous overload current of all of the paralleled power supply modules can be in excess of twice the normal load current As the circuit is triggered by the occurrence of an output undervoltage condition this circuit can also protect circuits which may be unduly stressed in the presence of an extended undervoltage condition an example of this are bat teries which can be damaged by discharge voltages below a specified minimum NOTE When undervoltage lockout mode is enabled it is necessary to also enable the Remote Reset function see PAR 3 12 in order for the Remote Inhibit function to oper ate properly HSMSERIES OPR 082115 3 5 3 10 3 11 3 6 CURRENT LIMIT CURRENT WALK IN CIRCUIT HSM power supplies incorporate a specialized output regulator start up circuit for applications involving use of the HSM as a battery charger This circuit enabled via switch S1 2 overrides the normal duty cycle based soft start circuit which could still result in very fast output current rise rates into a discharged battery and substitutes a controlled current rise circuit with a time constant in accordance with Bellcore TR TSY 000947 requirements for telecommunications bat tery rectifiers see Figure 3 4 The circuit is reset each time that the output regulator is sh
38. ircuit is fully isolated from ground and only then establish a single point along the output load circuit as the single wire ground point The exact location of the best d c ground point is entirely dependent upon the specific applica tion and its selection requires a combination of analysis good judgement and some amount of empirical testing If there is a choice in selecting either the positive or negative output of the power supply for the d c ground point both sides should be tried and preference given to the ground point producing the least noise For single isolated loads the d c ground point is often best located directly at one of the output terminals of the power supply when remote error sens ing is employed d c ground may be established at the point of sense lead attachment In the specific case of an internally grounded load the d c ground point is automatically established at the load The output terminals of HSM power supplies are d c isolated floating from the chassis in order to permit the user maximum flexibility in selecting the best single point ground location Output ripple specifications as measured at the output are equally valid for either side grounded Care must be taken in measuring the ripple and noise at the power supply measuring devices which are a c line operated can often introduce additional ripple and noise into the circuit There is unfortunately no best method for interconnecting the
39. le current signal reset requires output voltage recovery to within the specified 1 regulation range and or module current recovery to gt 85 of required module current respectively TABLE 3 2 FAULT DETECTOR OPERATION UNDERVOLTAGE UNDERCURRENT OVERVOLTAGE DCFAIL STATUS N N N OFF Y X 5 ON N Y N ON i N Y ON Y Y OFF Y YES N X DON T CARE EXCLUDED BY ANOTHER ASSUMED CONDITION OVERTEMP STATUS FLAGS This fault is generated in the event that either the input or output module heatsink temperature rises above a safe operating level output regulator shutdown occurs simultaneously Recovery occurs automatically upon reduction of internal temperatures to normal levels FANFAIL STATUS FLAGS This fault is generated in the event of a failure of the internal cooling fan a delay of approximately 5 sec onds is incorporated to prevent nuisance indications at turn on Reset occurs when fan operation resumes HSMSERIES OPR 082115
40. load and power supply Individ ual applications location and nature of the load require careful analysis in each case Ground ing a single point in the output circuit can be of great importance It is hoped that the preceding paragraphs will be of some assistance in most cases For help in special applications or difficult problems consult directly with Kepco s Application Engineering Department POWER SUPPLY LOAD INTERFACE The general function of a voltage or current stabilized power supply is to deliver the rated out put quantities to the connected load The load may have any conceivable characteristic it may HSMSERIES OPR 082115 2 5 2 7 5 2 6 be fixed or variable it may have predominantly resistive capacitive or inductive parameters it may be located very close to the power supply output terminals or it may be a considerable dis tance away The perfect interface between a power supply and its load would mean that the specified performance at the output terminals would be transferred without impairment to any load regardless of electrical characteristics or proximity to each other The stabilized d c power supply is definitely not an ideal voltage or current source and practical interfaces definitely fall short of the ideal voltage stabilized power supplies have a finite source impedance which increases with frequency and all current stabilized power supplies have a finite shunt impedance which decreases with frequency T
41. ng This is the factory set default mode of operation When the output current of the power supply reaches the programmed current limit the output regulator switches to current mode operation and maintains the output current by modulating the out put voltage this operating mode is maintained indefinitely and recovery to voltage regulation mode is automatic upon reduction of the output current below the current limit point This mode is ideal for high power battery chargers and applications where operation in current regulation mode is normal or where immediate recovery from an overload condition of any duration is critical NOTE HSM power supplies are designed to maintain continuous delivery of 110 of rated current indefinitely When operating parallel redundant power supply configurations in continuous limiting mode the user must size the power supply load interconnection conductors to withstand the total maximum load current available from all of the paral leled power supply modules b Undervoltage Lockout This mode is enabled when S1 3 is set to ON Figure 2 1 The crossover from voltage to current mode operation is the same as for Continuous Limiting however after approximately 15 seconds the output load regulation circuit is locked off via the overvoltage protection latch requiring the user to recycle source power to restart the power supply see PAR 3 8 This mode permits automatic recovery from short term over loads but elim
42. nnections between an a c power source and a stabilized power supply and between the power supply and its load are as critical as the interface between other types of electronic equip ment If optimum performance is expected certain rules for the interconnection of source power supply and load must be observed by the user These rules are described in detail in the follow ing paragraphs SAFETY GROUNDING Local national and international safety rules dictate the grounding of the metal cover and case of any instrument connected to the a c power source when such grounding is an intrinsic part of the safety aspect of the instrument The instructions below suggest wiring methods which com ply with these safety requirements however in the event that the specific installation for the power system is different from the recommended wiring it is the customer s responsibility to ensure that all applicable electric codes for safety grounding requirements are met SOURCE POWER CONNECTIONS The rear panel of the HSM power supply is equipped with an IEC 320 style recessed power inlet connector which provides interface to a 3 wire safety line cord via a polarized mating plug Kepco offers as accessories see Table 1 3 both a user wired mating connector and a prewired linecord set the latter configured for North American applications Terminal assignment follows internationally accepted conventions see Figure 2 3 It is the user s responsibility to ensure
43. o zero never select more than one programming mode at a time a Internal Programming This is the factory set default mode see Figure 2 1 when enabled via S3 3 the current limit is adjusted via the internal potentiometer labeled IMAX see Figure 2 1 b External Voltage Programming When enabled via S3 2 this mode provides for current limit adjustment via an external voltage source 0 10V connected between pins 15 and 19 IPROG S of the I O connector see Figure 3 3 This technique is useful when implement ing digital control of the power supply current limit via a D A converter Kepco s SN SNR 488 programmers are ideally suited to these requirements NECTOR FIGURE 3 3 EXTERNAL VOLTAGE PROGRAMMING OF CURRENT LIMIT CURRENT LIMIT PROGRAMMING RANGE The user may select the maximum programmable current limit either high or low range via S3 switch position 1 see Figure 2 1 This permits the user to trade adjustment range for program ming resolution this is especially useful when used in conjunction with external voltage pro gramming see PAR 3 5 for precise limit adjustment or for limiting the maximum programmable current limit Operation of the range selector is as follows a High Range This is the factory set default mode the maximum programmable current limit is 110 of rated l for all models b Low Range When enabled via S3 1 the maximum programmable current
44. onnections 1 THE POWER SUPPLY WILL NOT OPERATE UNLESS THE REMOTE SENSE LINES ARE PROPERLY CONNECTED TO THE OUTPUT TERMINALS Connect the remote sense ter minals to the output bus bars using the mating I O Connector Kepco P N 142 0422 or other means as shown in PAR 2 7 5 1 and Figure 2 3 2 Connect the power supply to source power as defined in PAR 1 3 Connection can be made using either the North American linecord set Kepco P N 118 0776 or using a custom line cord terminated at one end with an IEC 320 C19 plug Kepco P N 142 0381 Follow all requirements of local electric code regarding wire size termination etc 3 Connect a static load R across output terminals The load value is determined by the nomi nal output voltage of the HSM power supply and must be capable of handling 2 of the power supply output rating minimum power capability of 20 watts R is calculated as approximately equal to output voltage 20 R For example for the HSM 48 21 R 48 20 115 2 use load of 120 ohms 20 watts 4 Apply source power using a DVM measure the voltage across the output bus bars this volt age is factory set to the value shown in PAR 1 3 If necessary adjust the output voltage using the trim pot labeled Vo accessed through the top cover 5 Using the DVM measure the voltage across I O connector pins 38 and 19 this voltage should read 1 10 of the output voltage measured in step 4 above 1 6 Using the
45. onships HSMSERIES OPR 082115 3 14 2 OUTPUT STATUS FLAGS The OUTPUT STATUS flags are controlled by the output fault detector circuit which monitors both output voltage and module current to assess d c output status An output fault condition is generated if one of three fault conditions is detected 1 Overvoltage fault 2 Undervoltage Fault output voltage is outside specified regulation limits or 3 Undercurrent fault the power supply module is supplying less than 70 of the current required by the circuit as indicated by the load sharing signal while the output voltage is within specification limits A fault condition is not generated for a combination of overvoltage and undercurrent indications as these are mutually exclusive conditions for power supplies which are not part of a parallel redundant configuration this combination does however indicate proper operation for opera tional power supply modules which are part of a parallel redundant power scheme in which one or more power supply modules are presenting overvoltage failures FIGURE 3 6 TIMING DIAGRAM FOR POWER AND DCFAIL STATUS HSMSERIES OPR 082115 3 9 3 14 3 3 14 4 3 10 Table 3 2 provides an operating matrix of the output status function see Figure 3 6 for timing relationships The output voltage fault limits are 5 of programmed output voltage while the undercurrent fault limit is lt 70 of required modu
46. ontrol of several power supplies operating at different potentials Both positive and negative logic are supported see PAR 3 12 STATUS FLAGS Four sets of Form C dry relay contacts 3 wires each are provided at the I O connector which duplicate the front panel status indicator functions see PAR 3 14 SETPOINT MONITORS Analog voltage signals which display programmed output voltage and current limit values These signals are available at the I O connector VSET and ISET Signals are referenced to negative error sense see PAR 3 7 REMOTE ERROR SENSING Separate voltage sensing connections permit 4 wire connection to load Will compensate for static load effects due to power lead d c resistance DCR up to specified maximum voltage drop per load lead at maximum specified output voltage see PAR 3 2 LOAD SHARING Bidirectional control port provides forced load sharing between two or more power supplies wired in parallel see PAR 2 7 6 LOAD MONITOR Analog voltage signal which indicates actual load current delivered by the power supply see PAR 3 13 AUXILIARY SUPPLY Logic level secondary output provides up to 0 5 watts of power at 5V d c This output is isolated from the output and is unaffected by the status of the main output Provides power for external Remote Inhibit controls see PAR 3 11 OVERCURRENT UNDERVOLTAGE PROTECTION Switch selectable option provides the user load protection against long term output overloads o
47. r undervoltage conditions see PAR 3 9 CURRENT WALK IN Switch selectable option provides control of output current rise rate based on Bellcore TR TSY 000947 requirements for battery chargers see PAR 3 10 REMOTE RESET Switch selectable option provides capability to reset the latch used by the overvoltage protection circuitry to disable the output regulator using the Remote Inhibit control lines see PAR 3 12 HSMSERIES OPR 082115 1 5 1 5 OPTIONS HSM options are described below 1 5 1 BATTERY CHARGER B SUFFIX The battery charger option incorporates an expanded win dow for the output voltage fault detector compatible with normal battery operating voltages 1 6 ACCESSORIES Accessories for HSM Power Supplies are listed in Table 1 3 TABLE 1 3 ACCESSORIES PART ACCESSORY NUMBER USE RA58 Accommodates up to three Power Supplies in a 19 inch rack Used for hard wired applications RACK only ADAPTERS RA 61 Same as RA 58 except accommodates up to four Power Supplies in a 24 inch rack for hard wired applications 23E Incorporates wider mounting ears to accommodate a 23 inch rack available for all 19 inch rack RACK adapters above ADAPTER OPTIONS DAE Incorporates wider mounting ears to accommodate a 24 inch rack available for all 19 inch rack adapters above Used with HSM 24V 28V and 48V models when wired for series operation User must provide 124 0600 wiring and heat sink On
48. static Discharge EN 61000 4 2 Contact 4KV Air 8KV Low A C Protection HSM Power supplies will self protect no fixed limit Conducted RF ENV50141 10Vrms 0 15 80MHz Electrical Fast Transient EN 61000 4 4 2KV Tr Th 8 20us Latched shutdown if output voltage exceeds Input Surge EN 61000 4 5 Comm Mode 2KV Diff Mode 2KV Emissions Conducted RF CISPR 22 Class A Limits 0 15 30MHz Overvoltage user selected limit see Operating Instructions Protection PAR 3 8 see Note 4 Constant current limiting optional undervol Overcurrent tage activated latched shutdown see Protection Operating Instructions PAR 3 9 see Note 4 Overtemperature Thermostat shutdown with hysteretic recovery Protection and automatic restart Current Harmonics EN 61000 3 2 0 2KHz any source load condition NOTES 1 Safety Agency approvals for a c input only 2 25 C 65 RH 3 Per EN 50082 2 Acceptance Criteria A 4 Latched shutdown requires that source power be cycled for restart optional restart by cycling REMOTE ON OFF control signal see Operating Instructions PAR 3 12 HSMSERIES OPR 082115 TABLE 1 2 GENERAL SPECIFICATIONS CONTINUED CHARACTERISTIC REQUIREMENT CHARACTERISTIC REQUIREMENT SIGN AL AND CONTROL ENVIRONMENT 3 3V amp 5V Models 0 25V per wire Remote Error Sensing All other Models 0 8V per wire
49. such applications as battery chargers The HSM power supply is designed for fixed installation applications where the load connec tions are hard wired to the power supply Forced current sharing and unique internal fault detec tion circuitry permits straight paralleling in redundant power applications with or without output blocking diodes Kepco RA 58 or similar rack adapters are available for EIA standard rack mounting For applications requiring plug in or hot swap power supply modules refer to Kepco HSP Series power supplies SPECIFICATIONS Table 1 1 below indicates specifications for parameters that vary for different HSM models Table 1 2 lists general specifications that apply to all HSM models TABLE 1 1 MODEL PARAMETERS OUTPUT VOLTAGE Sonic OUTPUT CURRENT RIPPLE NOISE recat Volts Volts Amps mV p p mV p p See Note 1 Nominal F Switchi Spike 100 Load Factory just actory 50 60 witching Spike 5 Loa Set ment Range Setpoint max max 20MHz 115V a c HSM 3 3 230 3 3 0 7 3 6 4 29 230 173 105 20 30 100 71 HSM 5 200 5 1 0 5 5 6 5 200 150 95 20 30 100 72 HSM 12 84 12 2 4 13 2 15 6 84 63 40 20 40 120 73 5 15 66 15 3 0 16 5 19 5 66 49 5 31 4 20 40 150 76 8 5 24 42 24 4 8 26 4 31 2 42 31 5 20 20 60 240 77 5 HSM 28 36 28 5 6 30 8 36 4 36 27 17 20 60 280 78 HSM 48 21 48 9 6 59 2 62 4 21 16 10 20 60 480 80 HSM 24 60 24 4 8 26 4 31
50. te a single large power supply To this end the following rules apply a If possible remote error sensing should be employed with all error sensing connections ter minated at the same physical point and as close to the power supplies as possible if local error sensing is required power lead voltage drops must be minimized Provide local noise decoupling capacitors across all sense wire termination points g The power supplies should be located as near to each other as possible with power termina tions bussed together using adequately sized interconnections the power supply load inter connections should be distributed evenly along the power supply output interconnection busses This is especially important in high current systems employing several power supply modules in parallel where voltage drops in the interface connections can be significant in comparison to the load share signal voltage and introduce both d c and a c errors c All power supply output voltages should be adjusted as closely as possible and in any case within a 2 error band Additionally the current limit setpoints should be identical and high enough to support the load requirements for N M systems this means setting the current limits high enough to tolerate loss of M power supplies and still support the load d Minimize the load share signal wire interconnection lengths to reduce risk of noise influence HSMSERIES OPR 082115 2 11 2 7 7 SIGNAL CONNE
51. top cover see Figure 2 1 To set the trip level to a new value perform the following steps NOTE For 48V Models only do not set OVP trip level above 63V 1 Disconnect any external load circuitry which may be damaged by excessive voltage a mini mum load of 5W is recommended see PAR 2 5 step 3 With source power removed connect load as shown in Figure 2 4 for local sensing except remove connection between I O connector pin 37 S and the output bus bar and substitute a 20K ohm potentiometer between pin 37 and the output bus bar adjust the pot for minimum resistance Rotate OVP ADJUST control on HSM fully clockwise Apply source power while monitoring voltage at output terminals bus bars increase exter nal pot resistance until the output voltage is set for the desired overvoltage protection value Slowly rotate the OVP ADJUST pot counterclockwise until the output is latched off voltage drops rapidly toward zero the overvoltage trip level is now adjusted to the desired overvolt age protection value step 4 above Remove source power for 30 seconds or until the internal fan stops turning reduce the external pot resistance slightly and reapply source power While monitoring the output voltage slowly increase the pot resistance until the output shuts down and verify trip set point if necessary repeat steps 3 through 6 above HSMSERIES OPR 082115 3 9 The signal generated by the OVP detector is g
52. urrent by the current rating of the applicable HSM model and rounding up to the next whole number when necessary HSM power supplies incor porate fault detection circuitry which precludes the need for output blocking diodes and utilize active current sharing circuitry to distribute the load current equally among the paralleled units Redundant operation is achieved by paralleling one or more power supplies than the minimum number required to support the load in this way system operation is not compromised by the failure of a single power supply Any number of HSM power supplies N M can be wired for redundant operation as long as N power supplies can support the load M representing the total number of failed power supplies When operating HSM power supplies in any parallel con figuration load sharing must be implemented among the paralleled modules this is required for proper operation of the fault detector see PAR 2 7 6 Pl PIN 19 5 F LOA pol FRC LOA PI 37 5 4 ISHARE 7 19 LOAD SHARE E SS l T_T I E 9 Z SOURCE N if N BLOCKI IODE BLOCKI IODE TIONAL TWIST TIONAL FIGURE 2 6 2 10 F d a TO ECTO TO ECT oe F UNIT La
53. ut down This circuit is targeted for battery charger applications but is ideal for any application which draws very large currents at power up such as high capacitance loads where this large current spike could result in circuit disruptions due to inductive coupling TIME SEC FIGURE 3 4 CURRENT WALK IN CHARACTERISTIC 5VAUX FLOATING SUPPLY HSM power supplies are equipped with an internal auxiliary supply which provides 5V at loads up to 100mA It is derived from the internal cooling fan supply and is therefore present when ever the source power is within specification and the internal bias supply is operating regard less of the status of the output regulator This supply is SELV and is isolated from the output power lines as well permitting the user to employ this supply to power circuits which do not share the same ground return as the output in fact this supply provides interface power for the remote inhibit control signals see PAR 3 12 Typical applications include single circuit control of several HSM power supplies operating at various potentials and polarities with respect to the controller The output is protected against overload and is diode isolated to permit paralleling with the auxiliary outputs of other HSM units regardless of model for additional load capacity or redundancy This output is available at I O connector pins 26 and 25 and AUXRIN respectively HSMSERIES OPR 082115 3 12 3 13 REMOTE I
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