RAX 1500W Operator Manual
Contents
1. a c nominal range 85 132V a c 220 240V a c nominal range 170 264V a c 320V d c nominal range 240 370V d c For d c input remove shorting link from left side barrier strip terminals INPUT SOURCE FREQUENCY Nominal 50 60 Hz Range 47 440 Hz At 440 Hz the leakage current exceeds the VDE safety specification limit BROWNOUT VOLTAGE 120V a c input selection 80V a c min 220 240V a c input selection 160V a c min 320V d c input selection 220V d c min INPUT CURRENT At 25 C with nominal output power tion INPUT SOURCE NOMINAL INPUT VOLTAGE MINIMUM INPUT VOLTAGE 120 V a c input selection 25A 32A 21A 41A max 220 240V a c input selec 16A 18A 18A 36A d c input selection 7 0A max 320V input 9 0A max 240V input KEPCO INC 131 38 SANFORD AVENUE FLUSHING NY 11352 U S A TEL 718 461 7000 FAX 718 767 1102 http www kepcopower com email hg kepcopower com 2000 KEPCO INC Data subject to change without notice 228 1229 REV 2 INPUT PROTECTION AND SOFT START A thyristor soft start circuit reduces start up surge Units are protected against shorts by an input fuse Fuse value 50A INPUT SURGE At 25 C from cold start NOTE There are two input surges at turn on INPUT SOURCE FIRST SURGE 1 2 of first input cycle SECOND SURGE 3ms max 120 V a c input selection 20A max 130A typ 220 240V a c inpu2. and chassis 100 megohms minimum 3041275 L 500V d c NOTE THE SENSE LEADS MUST NEVER BE DISCONNECTED FROM THE OUTPUT IF THE LEAKAGE CURRENT SENSE LEADS ARE ALLOWED TO FLOAT FREE OF THE OUTPUT THE OUTPUT VOLT AGE WILL RISE TO THE OVERVOLTAGE POINT AND THE UNIT WILL SHUT DOWN 1 0mA max at 120V a c U L Method FOR REMOTE SENSING CONNECT THE SENSE TERMINALS TO THE LOAD AS 2 0mA max at 240V d c U L VDE Method SHOWN AND REMOVE THE TWO SENSING LINKS VIBRATION Three Axes 1 hour each axis nonoperating TAY BREE THE Le IN PLACE AND CONNECE AHE 5 10Hz 10 mm amplitude 10 55Hz 2g FIGURE 1 LOAD CONNECTION REMOTE SENSING SHOCK Three axes 20g 11 5 ms pulse duration 3 shocks each axis nonoperating EMI CONDUCTED FCC Class A SAFETY All units designed to meet UL 1950D3 UL 478 CSA Electrical Bulletin 1402C RAX 48 30K Level 1 other RAX models Level 5 VDE 0806 TUV Rheinland EN60950 and IEC 950 Safety Standards RAX are CE marked per the Low Voltage Directive LVD EN60950 The standards do not apply with DC input operation lil OPERATION UNIT WILL NOT WORK WITH SENSE LEADS DISCONNECTED SEE FIG 1 INSTALLING THE POWER SUPPLY Refer to Figure 3 The unit may be mounted on one of the three mounting surfaces Mounting holes are provided for each mounting configuration The air surrounding the power supply must not exceed the ambient values given in Table 1 Allow at least 1 0 free spac
3. GE ADJUSTMENT Refer to Figure 3 Voltage is adjusted from the front panel as marked To adjust voltage first place the unit under an operating load then monitor the and sense terminals with a precision voltmeter and turn the voltage control to the desired operating value Refer to Table 1 for Adjustment Range FUSE PROTECTION The user is provided with a 50A input fuse for protection during normal operation The fuse is accessible after the cover is removed refer to Figure 3 The following fuse is specified KEPCO P N 541 0105 or Manufacturer Fuji P N CR2LS 50 UL 50A 250V The Unit also employs internal fuses for safety and protection against catastrophic failures These fuses are only accessible when the unit is disas sembled for repair Two soft start fuses Kepco P N 541 0104 or manufacturer Uchihashi P N 121 2A 250V and a switcher fuse Kepco P N 541 0048 or Manufacturer Bussman ABC 15A 15A 250V IV CONTROLS TERMINATIONS AND ADJUSTMENTS The following controls terminations and adjustments are available to the user D C OUTPUT The output appears on heavy bus bars at the front center of the unit SENSE SENSE These leads compensate for voltage error and must be placed directly on the load terminals for the most accurate error track ing The unit is delivered with removable links on the front panel that connect the sense leads directly to the output bus terminals The links may be removed and the sense leads connected
4. INS TRUCTION MANUAL INTRODUCTION SCOPE OF MANUAL This instruction manual covers the installation and operation of the Kepco RAX 1500W Series of Switching Power Supplies For service information please refer to the Service Manual for the RAX 1500W Series which can be purchased either from your Kepco Representa tive or by writing directly to Kepco Inc 131 38 Sanford Avenue Flushing New York 11352 U S A When ordering a Service Manual please state K E P C O An ISO 9001 Company 1500 WATT SINGLE OUTPUT SWITCHING POWER SUPPLIES CAUTION UNIT IS SET TO 115V AC OPERATION Model Designation and Serial Number of your RAX power supply This information can be found on the nameplate of the unit DESCRIPTION The Kepco RAX 1500W Series consists of four models of switching power supplies with a single output as shown in Table 1 Units may be operated with either 120V a c or 220 240V a c 47 440Hz input They will also operate on 240V to 370V d c input The RAX 1500W Series employs a light weight ferrite core with 165 KHz switching frequency Regulation is provided by pulse width modulation A FET power stage operating in the forward conversion mode provides a smooth isolated d c output A thyristor soft start circuit prevents excessive turn on current surge Over voltage protection and optically isolated remote TTL on off control is provided Current limiting with automatic recovery from short circuit is featured Units are enc
5. Turn off or shutdown takes place under the following conditions REMOTE CONTROL Bringing the RC terminals together with either a mechanical switch or logic control causes the unit to turn off and remain off as long as the condition is maintained Output resumes immediately when the remote terminals are reopened FAN FAILURE The Unit will not operate unless both fans are operating If either fan stops rotation the unit shuts down and remains shut down as long as the condition exists OVERCURRENT AND SHORT CIRCUIT Overcurrent causes an abrupt voltage drop Current remains at the maximum value When the output voltage falls to less than 70 of nominal for 20 seconds the output is shut down but the fans remain operating If the cause of the overcurrent is removed within 20 seconds output returns to normal If overcurrent remains beyond 20 seconds a restart cycle is required as described in the fore going The unit must remain off for 30 seconds before restarting OVERTEMPERATURE A thermistor heat sensor is located in the switcher heatsink When heatsink temperature reaches 120 C the output cuts off and remains off as long as the temperature remains above 120 C SO 2 A CBO BO UNIT 1 UNIT 2 UNIT 3 3041274 FIGURE 2 PARALLEL CONNECTION USING CURRENT BALANCE KEPCO INC 131 38 SANFORD AVENUE FLUSHING NY 11352 U S A TEL 718 461 7000 FAX 718 767 1102 http ki i
6. directly to the load This compensates for voltage drop in the leads to the load Refer to Figure 1 MONITOR The monitor leads are placed across the output and may be connected to a precision voltmeter to monitor output MONITOR LIGHT This a a green LED that is ON when output is present VOLTAGE ADJUST R156 This potentiometer is mounted just below the monitor light It is used to adjusted the output voltage within the range specified in this manual REMOTE CONTROL RC The RC leads cause the unit to turn off when the leads are brought to ground potential with a mechanical switch or TTL control Use of remote control is optional REMOTE VOLTAGE ADJUST RV A potentiometer placed between the RV terminal and the Sense terminal may be used to adjust voltage from a remote location Its use is optional For RAX 48 30K use a 10K ohm external potentiometer All other models use 5K ohm When the external voltage adjustment feature is used the panel voltage adjustment should be turned fully clockwise CURRENT BALANCE CB These terminals are used when up to three RAX 1500 units are connected in parallel When using a parallel connec tion the CB terminals are connected together as shown in Figure 2 Output voltage tolerance 5 per unit current balance tolerance 10 max out put current range nominal 20 90 A C INPUT VOLTAGE Labelled terminals are provided on the front panel for selecting input voltage V SHUT DOWN PROTECTION AND REMOTE CONTROL
7. e at the rear of the unit to insure free air movement from the fans CONNECTING THE LOAD The load is connected as shown in Figure 1 Error sensing may be done at the load terminals when it is nec essary to compensate for voltage loss in the connecting wires The jumper links must then be removed from the sense terminals The unit will compensate for up to 0 4 volts loss per connecting wire In the RAX 5 300K it is 0 25 volts KEPCO INC 131 38 SANFORD AVENUE FLUSHING NY 11352 U S A TEL 718 461 7000 FAX 718 767 1102 http ki il hq ki ds2200 p www epcopower com Amal q kepcopower com 2 PARALLEL CONNECTION Refer to Figure 2 Connect the Current Balance CB terminals as shown SELECTING INPUT VOLTAGE Input voltage is selected with a shorting link Refer to Figure 1 The power supply is delivered for 115V a c operation Remove shorting link from left side barrier strip terminals to operate the unit from a nominal 220 240V a c or 320V d c source REMOTE TURN ON TURN OFF When power is on at the source the unit may be turned on or off with the remote control feature The output of the remote turn on off terminals operates at TTL logic levels 2 4V high from the unit and 0 0 to 0 4V short to ground low The unit is turned off by bringing the remote turn on off terminals to low logic level with a switch or solid state device If the remote on off feature is not desired the terminals should be left open VOLTA
8. l hq k gens p www epcopower cgm Amal q kepcopower com 3 7 TER MINAL BLOCK POLYBUTYLENE TEREPHTHALATE BLACK ETAIL B D 3 3S o E 00 2 SS S cre O A H oe Lre o N i lt 4 o c 2 ill i 8 30 MAX P AIR FLOW fl AR FLOW DETAIL B MONITOR SENSE EMOTE VOLTAGE ADJUST CURRENT BALANCE i REMOTE CONTROL Lp PON S Plated Chromate Wash 5 WEIGHT 17 6 Ibs 8 0 Kg max FIGURE 3 OUTLINE DRAWING RAX 1500W SERIES TAP 8 32 4 0 42 0 08 gt gt 1 18 i VON a Dimensions in parentheses are in millimeters others are in inches TOLERANCES 0 04 1 0 mm except as noted MOUNTING SCREW PENETRATION 0 024 6 mm maximum MATERIAL AND FINISH A Frame is aluminum phosphate coated 16 53 Ibs 7 5 Kg typ MOUNTING HOLES B CHASSIS Steel Cadmium KEPCO INC 131 38 SANFORD AVENUE FLUSHING NY 11352 U S A TEL 718 461 7000 FAX 718 767 1102 9 REV 2 http Awww kepcopower com email hg kepcopower com 092200
9. losed in a wrap around aluminum case with an LED output present light visible on the terminal side of the case Table 1 contains specifications and operating limits of individual RAX 1500W Series models Section II following contains specifications and operat ing limits common to all RAX 1500W Series Models ll SPECIFICATIONS The following specifications are at nominal input voltages at 25 C unless otherwise specified TABLE 1 OUTPUT RATINGS AND SPECIFICATIONS RAX 1500W SERIES MODEL RAX 5 300K RAX 12 125K RAX 24 65K RAX 48 30K OUTPUT VOLTS d c 5V 12V 24V 48V ADJUSTMENT RANGE 4 0 5 5V 8 4 13 2V 16 8 26 4V 32 6 52 8V MAXIMUM 50 C amb 300 0A 1500W 125 0A 1500W 65 0A 1560W 30 0A 1440W Snes 60 C amb 210 0A 1050W 87 5A 1050W 45 5A 1092W 21 0A 1008W AMPS WATTS 71 C amb 120 0A 600W 50 0A 600W 26 0A 624W 12 0A 576W EFFICIENCY 79 81 83 84 CURRENT LIMIT AMPS 315 0 350 0 130 0 140 0 68 0 72 0 32 0 35 0 OVP RANGE VOLTS 6 0 6 9 13 7 15 7 27 0 30 5 55 0 59 0 source typ 5 15 25 35 RIPPLE source max 20 30 40 90 NOISE switching typ 50 60 60 70 mV p p switching max 120 150 150 150 spike noise max 2 200 250 300 500 1 Source component 2x source frequency and switching component approximately 165KHz 2 Measured with a 50 MHz bandwidth p p INPUT VOLTAGE Jumper selectable from front panel see Section Ill 120V
10. t selection 40A max 160A typ 320V d c input selection 40A max 160A typ STABILIZATION CHARACTERISTIC TYPICAL MAXIMUM Source Effect min max 0 2 1 0 Load Effect measured at sensing terminals 10 100 load change 0 3 1 0 Temperature effect 0 to 71 C 0 2 1 2 Combined effect envelope 0 7 3 0 Drift 8 hr at 25 C after half hour warm up 0 2 0 5 TRANSIENT RECOVERY A step load change from 50 to 100 of rated load current produces no more than 4 output voltage excursion Recovery to 1 of the original voltage is less than 1 millisecond The step load change should be greater than 200ms Tr Tf should be greater than 3ms OUTPUT HOLDING TIME Output is maintained for 20 milliseconds minimum upon input interruption 30 milliseconds tvpical AMBIENT OPERATING TEMPERATURES See Table 1 STORAGE TEMPERATURE 20 C to 75 C HUMIDITY 20 to 95 relative humidity noncondensing ALTITUDE Operating 10 000 feet 3048 0m Nonoperating 35 000 feet 10 668m ISOLATION at 20 C ambient 85 relative humidity Between input and output terminals 3 75 KV a c for 1 minute with Y capacitors removed Between input and output or chassis 2000V a c for 1 minute aN Between output terminals and chassis 500V a c for 1 minute A LINKS SEE NOTE INSULATION RESISTANCE Between output gle
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