USER MANUAL
Contents
1. 8 3 1 2 Balanced Three phase network 9 3 1 3 High voltage network with CT and VT 9 3 2 EST DEC 3 and DEC3 485 WIRING DIAGRAMS 9 3 2 1 Three phase 3 wire delta network 9 3 2 2 High voltage Three phase 3 wire delta network with CT and VT 11 3 2 3 Three phase 4 wire star network 11 4 1 General Specifications 12 4 2 Display specifications 13 4 3 FORMULAE USED 14 4 3 1 Single phase formulae DEPT DEC DEC 485 14 4 3 2 Three phase formulae EST DEC 3 DEC3 485 14 5 1 EST 4 20 and DEPT 4 20 15 5 1 1 Functions available2. 15 5 1 2 Instrument programming 16 5 1 3 Output connection 17 5 1 4 Measurement reading 17 5 2 DEPT P DEC EST P and DEC 3 18 5 2 1 Functions available 18 5 2 2 Output pulse specifications 19 5 2 3 Instrument programming 19 5 2 4 Output connection 21 5 2 5 DEC and DEC 3 counter labelling 22 5 3 DEPT 485 and EST 485 22 5 3 1 Functions available 22 5 3 2 Instrument programming 24 5 3 3 Specifications of RS485 transmission and r
3. DEC 3 e DEC3 485 EST Fig 20 Fig 20 Fig 20 Fig 20 Fig 20 Fig 21 Fig 21 Fig 21 Fig 21 Fig 21 9 5 9 0 6 2 41 10 58 4 5 105 157 5 Current signal connection with 3 CTs Current signal connection with 3 CTs Current signal connection with 3 CTs Current signal connection with 3 CTs Current signal connection with 3 CTs 4 1 General Specifications Inputs Inputs Inputs Inputs Inputs Voltage 500 V from 20 to 800 Hz 1 Current 5 A from 20 to 800 Hz 1 Limit imposed by standards The measurement Full Scale is 750 VAC Input overload Input overload Input overload Input overload Input overload Voltage max 800 Vrms peak 900 Vrms for 1 Sec Current max 20 Arms peak 100 Arms for 1 Sec Number of scales Number of scales Number of scales Number of scales Number of scales 3 current scales 2 voltage scales Scale change response time Scale change response time Scale change response time Scale change response time Scale change response time 1 Sec DEPT DEC 1 5 Sec EST DEC 3 Upper scale change Upper scale change Upper scale change Upper scale change Upper scale change occurs at 110 of the scale activated Lower Scale change Lower Scale change Lower Scale change Lower Scale change Lower Scale change when 100 of the scale below the
4. A and B and the shield by Connect a line termination resistor RT 100 120 between the two twisted pair cables leading from the converter at the end of the network last instrument connected The shield must be earthed The instruments must be connected to the twisted pair so that the terminals marked A instrument label are connected to cable A the terminals marked B are connected to cable B and the terminals marked are connected to the shield at the output of the RS232 RS485 converter see Fig 32 If an interface other than INT 485 is installed make sure it is fitted with resistor R If an interface other than INT 485 is installed make sure it is fitted with resistor R If an interface other than INT 485 is installed make sure it is fitted with resistor R If an interface other than INT 485 is installed make sure it is fitted with resistor R If an interface other than INT 485 is installed make sure it is fitted with resistor Rttttt and if not install and if not install and if not install and if not install and if not install one during the connection phase following the instructions in Fig 31 one during the connection phase following the instructions in Fig 31 one during the connection phase following the instructions in Fig 31 one during the connection phase following the instructions in Fig 31 one during the connection phase following the instructions in Fig 31 If an int
5. phase networks available with 4 20 mA signal output pulse output or RS485 data output EST EST EST EST EST Energy supervision transducer for installation in unbalanced Three phase 4 wire star or 3 wire delta networks available with 4 20 mA signal output pulse output or RS485 data output DEC DEC DEC DEC DEC Digital energy counter for installation in Single phase or balanced Three phase networks available with pulse output or RS485 data output DEC 3 DEC 3 DEC 3 DEC 3 DEC 3 Three phase digital energy counter for installation in unbalanced Three phase 4 wire star or 3 wire delta networks available with pulse output or RS485 data output Fig 2 Fig 2 Fig 2 Fig 2 Fig 2 DEC 3 DEC EST DEPT DEPT EST DEC DEC 485 200 240VAC 100 120VAC 200 240VAC 100 120VAC D EC 3 D EC3 485 50 mA T Fig 1 Fig 1 Fig 1 Fig 1 Fig 1 2 1 Instrument description Voltage input terminals Power supply terminals Output terminals Function selection dip switch DIN rail mounting hook Cable holes for CT secondary cables 7 digit electro mechanical counter 2 2 DIN RAIL MOUNTING Raise the black plastic hook on the botton of the instrument using a screwdriver and fit it onto the rail see Fig 1 DIN DIN DIN DIN DIN rail rail rail rail rail 2 3 POWER SUPPLY IMPORTANT IMPORTANT IMPORTANT IMPORTANT IMPORTANT Before powering up the instrument set the operating functions using
6. DEC DEC DEC EST P EST P EST P EST P EST P DEC 3 DEC 3 DEC 3 DEC 3 DEC 3 IMPORTANT IMPORTANT IMPORTANT IMPORTANT IMPORTANT Do not set dip switches 5 6 7 and 8 to position ON at the same time Direct measurement of max 5A loads IMPORTANT IMPORTANT IMPORTANT IMPORTANT IMPORTANT in this condition the 1A in this condition the 1A in this condition the 1A in this condition the 1A in this condition the 1A 5A current Full Scale setting is not operative 5A current Full Scale setting is not operative 5A current Full Scale setting is not operative 5A current Full Scale setting is not operative 5A current Full Scale setting is not operative 5 2 4 5 2 4 5 2 4 5 2 4 5 2 4 Output connection Output connection Output connection Output connection Output connection The pulse output is supplied directly to two screw terminals Fig 27 connected to the N O voltage free contacts of an optomos solid state relay rated at 250 Vac dc 100 mA Connection to pulse counters PLCs etc must be made using cables with max cross section of 4 mm2 Dip switch settings 5 6 7 8 Counter resolution Counter resolution Counter resolution Counter resolution Counter resolution kWh kWh kWh kWh kWh Pulse value 99 999 99 1 pulse 10 Wh Pulse output connection Pulse output connection Pulse output connection Pulse output co
7. Dip switches 1 2 Select the required parameters by setting dip switches 1 and 2 as shown in the diagram below The following parameters are available PPPPP Active Energy Power Q QQ QQcap cap cap cap cap Capacitive Reactive Energy Power Q QQ QQind ind ind ind ind Inductive Reactive Energy Power SSSSS Apparent Energy Power EST P DEC 3 DEPT P DEC 3 ON O FF 3 ON O FF 3 ON O FF 3 ON O FF 1 A 5A 4 4 ON O N O FF O FF Connection type selection Connection type selection Connection type selection Connection type selection Connection type selection Dip switch 3 Dip switch 3 Dip switch 3 Dip switch 3 Dip switch 3 Select the required connection type by setting dip switch 3 as shown below Three phase DELTA Balanced Three phase Single phase Three phase STAR Current Full Scale selection Dip switch 4 Current Full Scale selection Dip switch 4 Current Full Scale selection Dip switch 4 Current Full Scale selection Dip switch 4 Current Full Scale selection Dip switch 4 Two current Full Scales are available 1 A and 5 A Select the required Full Scale by setting dip switch 4 as shown below Y CT primary current selection Dip switches 5 6 7 8 CT primary current selection Dip switches 5 6 7 8 CT primary current selection Dip switches 5 6 7 8
8. Measuring interval Measuring interval Measuring interval Measuring interval Measuring interval 1 Sec DEPT DEC DEC 485 1 5 Secs EST DEC 3 DEC3 485 Zero self regulation Zero self regulation Zero self regulation Zero self regulation Zero self regulation At every measurement Offset Offset Offset Offset Offset Automatic amplifier offset correction Secondary measurement error Powers Secondary measurement error Powers Secondary measurement error Powers Secondary measurement error Powers Secondary measurement error Powers 1 of the measurement between 5 and 120 of the Full Scale Minimum readable signal 10 V Minimum readable signal 10 V Minimum readable signal 10 V Minimum readable signal 10 V Minimum readable signal 10 V V V RMS i i 1 1 2 1 240 240 I I RMS i i 1 1 1 240 2 240 P V I i i i 1 1 1 1 240 240 Q S P 1 1 2 1 2 S11111 V1RMS 1RMS 1RMS 1RMS 1RMS XXXXX I1RMS 1RMS 1RMS 1RMS 1RMS V V RMS i i 1 1 2 1 240 240 I I RMS i i 1 1 1 240 2 240 P V I i i i 1 1 1 1 240 240 Q S P 1 1 2 1 2 S1 V1RMSxI1RMS Minimum readable signal 20 mA Minimum readable signal 20 mA Minimum readable signal 20 mA Minimum readable
9. Voltage Three phase Active Power Three phase Active Power Three phase Active Power Three phase Active Power Three phase Active Power Three phase Current Three phase Current Three phase Current Three phase Current Three phase Current Three phase Reactive Power Three phase Reactive Power Three phase Reactive Power Three phase Reactive Power Three phase Reactive Power Three phase Apparent Power Three phase Apparent Power Three phase Apparent Power Three phase Apparent Power Three phase Apparent Power Phase Power Factor applicable to each phase Phase Power Factor applicable to each phase Phase Power Factor applicable to each phase Phase Power Factor applicable to each phase Phase Power Factor applicable to each phase YYYYY 8 pole 8 pole 8 pole 8 pole 8 pole dip switch dip switch dip switch dip switch dip switch 5 1 EST 4 20 and DEPT 4 20 DEPT 4 20 and EST 4 20 units are electrical parameter transducers with a 4 20 mA output specially designed for connection to recorders and remote indicators for process control and regulation and data acquisition systems 5 1 1 Functions available 5 1 1 Functions available 5 1 1 Functions available 5 1 1 Functions available 5 1 1 Functions available Measurement selection Active Power Reactive Power Power Factor Apparent Power Connection type selection Single phase or Balanced Three p
10. signal 20 mA Minimum readable signal 20 mA Crest factor Crest factor Crest factor Crest factor Crest factor 2 3 minimum on both the input voltage and current 4 3 FORMULAE USED 4 3 1 4 3 1 4 3 1 4 3 1 4 3 1 Single phase formulae DEPT DEC DEC 485 Single phase formulae DEPT DEC DEC 485 Single phase formulae DEPT DEC DEC 485 Single phase formulae DEPT DEC DEC 485 Single phase formulae DEPT DEC DEC 485 RMS Voltage RMS Voltage RMS Voltage RMS Voltage RMS Voltage RMS Current RMS Current RMS Current RMS Current RMS Current Active Power Active Power Active Power Active Power Active Power Apparent Power Apparent Power Apparent Power Apparent Power Apparent Power Reactive Power Reactive Power Reactive Power Reactive Power Reactive Power Power Factor Power Factor Power Factor Power Factor Power Factor 4 3 2 4 3 2 4 3 2 4 3 2 4 3 2 Three phase formulae EST DEC 3 DEC3 485 Three phase formulae EST DEC 3 DEC3 485 Three phase formulae EST DEC 3 DEC3 485 Three phase formulae EST DEC 3 DEC3 485 Three phase formulae EST DEC 3 DEC3 485 RMS Phase Voltage applicable to each phase RMS Phase Voltage applicable to each phase RMS Phase Voltage applicable to each phase RMS Phase Voltage applicable to each phase RMS Phase Voltage applicable to each phase RMS Phase Current applicable to each phase RMS Phase Current applicable to each phase RMS Phase Current ap
11. the 8 pole dip switch as described in chapter 5 page 15 for DEPT 4 20 EST 4 20 page 18 for DEPT P EST P DEC DEC 3 page 23 for DEPT 485 EST 485 Programming modifications made while the instrument is powered up will not be accepted The instrument must be powered by a 200 240 VAC 50 60 Hz voltage 100 120 VAC 50 60 Hz is also available on request using a 4 mm2 max cable connected to the screw type power supply terminals as shown in Fig 2 The instrument s power supply does not require an earth connection The instrument is not fitted with a protection fuse A 50 mA T HBC fuse must therefore be connected to the power supply circuit Fig 3 Fig 3 Fig 3 Fig 3 Fig 3 Fig 4 Fig 4 Fig 4 Fig 4 Fig 4 Fig 5 Fig 5 Fig 5 Fig 5 Fig 5 Max 500 VAC Max 500 VAC Max 500 VAC Max 500 VAC Max 500 VAC LOW LOW LOW LOW LOW HI HI HI HI HI L1 L2 L3 L1 L2 L3 L1 L2 L3 N L1 L2 L3 N 2 4 VOLTAGE MEASUREMENT CONNECTION Using cables with max cross section of 4 mm2 attach them to the voltage measurement screw terminals The following diagrams illustrate how to connect the terminals to the phases Follow the diagrams to make the correct voltage measurement connection in relation to the type of instrument used and the system in which it is installed 2 4 1 2 4 1 2 4 1 2 4 1 2 4 1 THREE PHASE 3 WIRE DELTA NETWORK THREE PHASE 3 WIRE DELTA NETWORK THREE PHAS
12. 50 VAC The Full Scale is 750 VAC The Full Scale is 750 VAC N B N B N B N B N B If the voltage and or current signal connection is accidentally inverted the instrument s automatic compensation function corrects the inversion thereby guaranteeing accurate readings This chapter contains the wiring diagrams and instructions required to connect the instrument This chapter contains the wiring diagrams and instructions required to connect the instrument This chapter contains the wiring diagrams and instructions required to connect the instrument This chapter contains the wiring diagrams and instructions required to connect the instrument This chapter contains the wiring diagrams and instructions required to connect the instrument Note Note Note Note Note The following wiring diagrams are applicable to all instruments with serial number on label on side of instrument greater than 15000 and used in conjunction with ELEXTOOL software In all other cases DEC DEC 3 DEPT P and EST P instruments may only be programmed using the relative Programming dip switches Note Note Note Note Note Phases L1 L2 L3 shown in the wiring diagrams need not necessarily correspond with those of the three phase system The voltage and current signal connections must however always correspond The wiring diagrams indicate the voltage and current polarities which must be observed In the case of inversions the instrument automatica
13. 500 V Select the required Full Scale by setting dip switches 4 and 5 as shown below N B N B N B N B N B EST 4 20 voltage Full Scales apply to both 4 wire star and 3 wire delta Phase to Phase voltages Fig 24 Fig 24 Fig 24 Fig 24 Fig 24 7 ON O FF 8 O N O FF O N O FF ON O FF 7 8 7 8 7 8 1 A 1 5 A 1 6 6 ON O N O FF OFF Current Full Scale selection Dip switch 6 Current Full Scale selection Dip switch 6 Current Full Scale selection Dip switch 6 Current Full Scale selection Dip switch 6 Current Full Scale selection Dip switch 6 Two current Full Scales are available 1 A and 5 A Select the required Full Scale by setting dip switch 6 as shown below N B N B N B N B N B EST 4 20 current Full Scales apply to Three phase measurements Integration period selection Dip switches 7 8 Integration period selection Dip switches 7 8 Integration period selection Dip switches 7 8 Integration period selection Dip switches 7 8 Integration period selection Dip switches 7 8 Power readings may also be calculated as average values over programmable integration periods of 10 15 or 30 minutes Select the required integration period by setting dip switches 7 and 8 as shown below 5 1 3 5 1 3 5 1 3 5 1 3 5 1 3 Output connection Output connection Output connection Output connection Output connection The instrument is equipped wit
14. Active Power P F P F P F P F P F Power Factor Cos SSSSS Apparent Power Q QQ QQ Reactive Power PPPPPmmmmm Average Active Power SSSSSmmmmm Average Apparent Power PPPPPMD Maximum Active Power SSSSSMD Maximum Apparent Power EEEEEA Active Energy Consumption kWh EEEEER Reactive Energy Consumption kvarh 22 measurements are available on EST 485 units 22 measurements are available on EST 485 units 22 measurements are available on EST 485 units 22 measurements are available on EST 485 units 22 measurements are available on EST 485 units U RMS voltage IIIII RMS current PPPPP Active Power P F P F P F P F P F Power Factor Cos SSSSS Apparent Power Q QQ QQ Reactive Power PPPPPmmmmm Average Active Power SSSSSmmmmm Average Apparent Power PPPPPMD Maximum Active Power SSSSSMD Maximum Apparent Power EEEEEA Active Energy Consumption kWh EEEEER Reactive Energy Consumption kvarh HHHHHZ Frequency EST 485 provides both the three phase and phase measurements of U I and P values The three phase voltage is calculated as the average value of the three phase to phase voltages while the three phase current is the current equivalent to a balanced and symmetrical system see formulae on page 14 The average power values are calculated by sliding window mathematics Programmable CT and VT ratios for direct readings Programmable CT and VT rat
15. CT primary current selection Dip switches 5 6 7 8 CT primary current selection Dip switches 5 6 7 8 The CT primary current is selected using dip switches 5 6 7 and 8 Refer to the table on page 21 for available CT primary ratings It should be noted that the magnitude of the CT primary automatically determines the value of each pulse and hence the resolution of an associated pulse counter A 7 digit electro mechanical counter is mounted on the front panel of DEC and DEC 3 units to permit direct energy consumption readings for more information see para 5 2 4 Examples CT 20 5 Pulse value 0 1 kWh Counter resolution 999 999 9 kWh CT 200 5 Pulse value 1 kWh Counter resolution 9 999 999 kWh The instrument provides kWh kVAh or kvarh readings depending on the parameter selected The instrument provides kWh kVAh or kvarh readings depending on the parameter selected The instrument provides kWh kVAh or kvarh readings depending on the parameter selected The instrument provides kWh kVAh or kvarh readings depending on the parameter selected The instrument provides kWh kVAh or kvarh readings depending on the parameter selected Accurate energy totals are guaranteed even in the case of very small loads The instrument s internal floating point mathematics is able to count energy increments down to 10 4 of the pulse value 5 O N O F F 6 7 8 DEPT P DEPT P DEPT P DEPT P DEPT P DEC DEC
16. Dip switch 4 Data format selection Dip switch 4 Data format selection Dip switch 4 Data format selection Dip switch 4 Reversed MSB Normal MSB selection Dip Reversed MSB Normal MSB selection Dip Reversed MSB Normal MSB selection Dip Reversed MSB Normal MSB selection Dip Reversed MSB Normal MSB selection Dip switch 5 switch 5 switch 5 switch 5 switch 5 IMPORTANT IMPORTANT IMPORTANT IMPORTANT IMPORTANT Dip switch 6 is not used Fig 30 Fig 30 Fig 30 Fig 30 Fig 30 7 ON OFF 7 ON OFF 8 ON OFF 8 ON OFF Parity type selection Dip switch 7 Parity type selection Dip switch 7 Parity type selection Dip switch 7 Parity type selection Dip switch 7 Parity type selection Dip switch 7 Select the required parity type EVEN or ODD by setting dip switch 7 as shown below Parity selection Dip switch 8 Parity selection Dip switch 8 Parity selection Dip switch 8 Parity selection Dip switch 8 Parity selection Dip switch 8 Select the required parity PARITY or NO PARITY by setting dip switch 8 as shown below Odd Even No parity Parity 5 3 3 5 3 3 5 3 3 5 3 3 5 3 3 Specifications of RS485 transmission and Specifications of RS485 transmission and Specifications of RS485 transmission and Specifications of RS485 transmission and Specifications of RS485 transmission and reception procedu
17. E 3 WIRE DELTA NETWORK THREE PHASE 3 WIRE DELTA NETWORK THREE PHASE 3 WIRE DELTA NETWORK The 500 VAC limit is imposed by standards The 500 VAC limit is imposed by standards The 500 VAC limit is imposed by standards The 500 VAC limit is imposed by standards The 500 VAC limit is imposed by standards The Full Scale is 750 VAC The Full Scale is 750 VAC The Full Scale is 750 VAC The Full Scale is 750 VAC The Full Scale is 750 VAC The 500 VAC limit is imposed by standards The 500 VAC limit is imposed by standards The 500 VAC limit is imposed by standards The 500 VAC limit is imposed by standards The 500 VAC limit is imposed by standards The Full Scale is 750 VAC The Full Scale is 750 VAC The Full Scale is 750 VAC The Full Scale is 750 VAC The Full Scale is 750 VAC Max 500 VAC Phase to Phase Max 500 VAC Phase to Phase Phase to Phase Phase to Phase Phase to Phase Phase to Phase Max 500 VAC Max 500 VAC Max 500 VAC Max 500 VAC Max 500 VAC Phase to Neutral Phase to Neutral Phase to Neutral Phase to Neutral Phase to Neutral Max 500 VAC Max 500 VAC Max 500 VAC Max 500 VAC Max 500 VAC Phase to Neutral Phase to Neutral Phase to Neutral Phase to Neutral Phase to Neutral The 500 VAC limit is imposed by standards The 500 VAC limit is imposed by standards The 500 VAC
18. EC EST P CT primary rating selection 14 typical values Functions are easy to program using the 8 pole dip switch see Fig 25 as shown in para 5 2 2 Refer to page 25 Fig 23 for cover removal instructions 8 pole dip 8 pole dip 8 pole dip 8 pole dip 8 pole dip switch switch switch switch switch 8 pole dip 8 pole dip 8 pole dip 8 pole dip 8 pole dip switch switch switch switch switch 5 2 2 5 2 2 5 2 2 5 2 2 5 2 2 Output pulse specifications Output pulse specifications Output pulse specifications Output pulse specifications Output pulse specifications The length of the output pulse varies between 400 and 500 mSecs see figure 26 below Pulse fractions are stored in an internal meter and supplied to the output as a complete pulse each time the meter accumulates a whole one 5 2 3 5 2 3 5 2 3 5 2 3 5 2 3 Instrument programming Instrument programming Instrument programming Instrument programming Instrument programming IMPORTANT IMPORTANT IMPORTANT IMPORTANT IMPORTANT Set the operating functions before powering up the unit Program setting changes made when the instrument is energised will not be accepted To change program settings power down the instrument and power up again Measurement selection Dip switches 1 2 Measurement selection Dip switches 1 2 Measurement selection Dip switches 1 2 Measurement selection Dip switches 1 2 Measurement selection
19. OMPLIANCE WITH IEC 1036 DIRECTIVE energy measurement CLASS 1 accuracy The packaging of each instrument bears a CE mark of conformity This instrument was manufactured and tested in compliance with class 2 IEC 1010 and VDE 411 standards in accordance with group C VDE 0110 standards for operating voltages up to 500 VACrms Quality and accuracy are guaranteed by an ISO9000 certified production structure which utilizes the latest surface mounting techniques therefore the instrument left the factory in perfect condition regarding technical safety In order to maintain this condition and to ensure safe operation the user must comply with the indications and markings contained in the following instructions When the instrument is received before beginning installation check that it is still intact and no damage was incurred during transport Before mounting ensure that the operating voltage and mains voltage set are the same and then proceed with installation The instrument unit is double insulated and does not require an earth connection The power supply must be connected to phase and neutral as shown in the relevant diagram A 50 mA T type HBC fuse should be installed in the power supply circuit to the instrument The power supply must be connected before the measurement circuit Before any maintenace and or repairs whenever the instmrument must be opened it must be disconnected from all power sources The instrument s ca
20. a multiple instrument connection Examples of a multiple instrument connection Example 2 INCORRECT INCORRECT INCORRECT INCORRECT INCORRECT connection Example 1 CORRECT CORRECT CORRECT CORRECT CORRECT connection Example 3 CORRECT CORRECT CORRECT CORRECT CORRECT connection The transmission reception protocol used by the RS485 interface MODBUS permits the creation of data collection systems with up to 247 measurement points A maximum of 32 instruments can be connected on a common line over a distance of up to 1000 m from the PC If the number of instruments exceeds 32 or the distance between them and the PC is over 1000 m line amplifiers must be used to guarantee correct data transmission reception see Fig 34 below 5 4 DEC 485 and DEC3 485 The wiring diagrams and output specifications for DEC 485 and DEC3 485 are the same as those specified for DEPT 485 and EST 485 units see para 5 3 of this manual Note Note Note Note Note DEC 485 and DEC3 485 instruments also feature an on board electro mechanical counter for kWh totals The pulse weight value may be modified to satisfy different requirements ie 1 10 kWh by using the ELEX software version 3 0 or higher 5 5 Connection of over 32 instruments or instruments installed over 1000 m from the PC An amplifier must be installed in systems containing more than 32 instruments or when instruments even if less than 32 are installed o
21. age incurred during transport or use it must be taken out of service and precautions taken to prevent accidental use Contact authorized technicians for checks and any repairs Sophisticated engineering backed by years of specialist experience in the electronics and electrotechnical sector have enabled ELECTREX to develop an innovative range of programmable microprocessor based transducers for electrical parameters whose outstanding versatility and ease of application satisfy a wide range of customer requirements in terms of electrical parameter control and energy cost management Advanced auto compensation technology guarantees excellent measurement reliability and stability even in the most adverse operating conditions Instruments are housed in a modular designed case 6 modules for DEPT EST DEC 9 modules for DEC 3 suitable DIN rail mounting 35 mm rail All circuits and internal insulation comply with industrial grade international standards IEC 1010 VDE 411 Class 2 Instruments are suitable for installation in singlephase balanced three phase DEPT and DEC or unbalanced three phase 4 wire star and 3 wire delta EST and DEC 3 networks Measurements are RMS values with automatic current 3 scales and voltage 2 scales scale change Functions are easily selected by dip switch The following models are available DEPT DEPT DEPT DEPT DEPT Digital electrical parameter transducer for installation in Single phase or balanced Three
22. and 100 800 column CT primary range as shown in Fig 28 5 3 DEPT 485 and EST 485 DEPT 485 and EST 485 units are electrical parameter transducers with an RS485 interface for network connection to a PC or PLC Up to 32 instruments can be network connected over a distance of up to 1000 m without amplification The system may be further expanded to a maximum of 247 measuring points using additional line amplifiers DEPT 485 and EST 485 units are particularly suited for the following applications data acquisition systems for quality control of production processes networks for monitoring electrical energy consumption and the status of components eg motors transformers etc maximum demand control and load shedding in combination with PLCs or PC networked applications for the reduction of energy bills computerised energy cost accounting and division of electrical energy bills between departments etc Functions are controlled by an RS485 interface using MODICON s MODBUS communication protocol 5 3 1 5 3 1 5 3 1 5 3 1 5 3 1 Functions available Functions available Functions available Functions available Functions available 12 measurements are available on DEPT 485 units 12 measurements are available on DEPT 485 units 12 measurements are available on DEPT 485 units 12 measurements are available on DEPT 485 units 12 measurements are available on DEPT 485 units UUUUU RMS voltage IIIII RMS current PPPPP
23. ches 1 2 Measurement selection Dip switches 1 2 Measurement selection Dip switches 1 2 Select the required parameters by setting dip switches 1 and 2 as shown in the diagram below The following parameters are available P P P P P Active Power Q Q Q Q Q Reactive Power P F Cos P F Cos P F Cos P F Cos P F Cos Power Factor S S S S S Apparent Power Three phase DELTA Balanced Three phase Single phase Three phase STAR Connection type selection Connection type selection Connection type selection Connection type selection Connection type selection Dip switch 3 Dip switch 3 Dip switch 3 Dip switch 3 Dip switch 3 Select the required connection type by setting dip switch 3 as shown below Voltage Full Scale selection Dip switches 4 5 Voltage Full Scale selection Dip switches 4 5 Voltage Full Scale selection Dip switches 4 5 Voltage Full Scale selection Dip switches 4 5 Voltage Full Scale selection Dip switches 4 5 Nota Nota Nota Nota Nota 1 Full Scales are mathematical multiplication factors and do not in any way limit the input voltages and currents The Full Scale is the No used in the instrument F S calculation formula For example a 125 V F S may be selected for a 400 V input or alternatively a 1A F S for a 5A CT Four voltage Full Scales are available 65 V 125 V 250 V and
24. defects of the equipment Also excluded from the warranty are technical interventions regarding the installation of the equipment Also excluded from the warranty are technical interventions regarding the installation of the equipment to the electrical system The manufacturer declines any responsability for eventual injury or damage to persons animals or things as result of failure to follow the instructions in the Instructions Manual or caused by improper use of the equipment The warranty covers equipment returned ex works The expenses of transport as well as the relative risks of same both to and from the place of repair will be the sole responsability of the User This warranty expires after the date of purchase and any assistance required after said date including spare parts labor transport of personnel and materials will be charged to the User basated on the tariffs in force for Technical Assistance Service at the time of such requested service In any case the substitution of the equipment as well as the extension of the warranty after such breakdown is excluded ELECTREX hereby declares that its range of transducers complies with the EMC requirements of Directive 89 336 EEC and also the requirements of the following standards EMISSIONS EN 50081 1 1992 EN 55022 CLASS B CI S PR 22 IMMUNITY EN 50082 1 light industry 1992 EN 50082 2 heavy industry 1994 IEC 1000 4 4 2kV on signals 4kV on power supply SAFETY IEC 1010 C
25. eception procedure 25 5 3 4 Output connection 25 5 3 5 Twisted pair connection 25 5 3 6 Shielded twisted pair connection 26 5 4 DEC 485 and DEC3 485 27 5 5 Connection of over 32 instruments or instruments installed over 1000 m from the PC 27 Y Y 3 di 36 TERMS OF WARRANTY The warranty is valid starting from the manufacturing date as evidenced on the receipt of the calibration certificate for the period indicated on the package If not specified the warranty will cover the equipment for a year from the purchasing date anyway not over 18 months from the manufacturing date The warranty covers the free repair or substitution of equipment parts which are recognized as faulty due to manufacturing defects The warranty does not cover those parts which result defective due to negligent or improper use incorrect installation or maintenance operation by unauthorized personnel damage during transportation or which in any case do not indicate manufacturing
26. ection Connection type selection Connection type selection Single phase or balanced Three phase DEPT 485 Unbalanced Three phase 4 wire star or 3 wire delta EST 485 Parity selection PARITY NO PARITY Parity selection PARITY NO PARITY Parity selection PARITY NO PARITY Parity selection PARITY NO PARITY Parity selection PARITY NO PARITY Parity type selection EVEN ODD Parity type selection EVEN ODD Parity type selection EVEN ODD Parity type selection EVEN ODD Parity type selection EVEN ODD 2400 4800 9600 DEPT 485 EST 485 Reversed MSB Normal MSB Reversed MSB Normal MSB 1 ON O FF 2 O N O FF ON OFF 1 2 1 2 3 ON O FF 3 ON O FF 3 ON O FF 3 ON O FF 4 ON O FF 4 O N OFF 5 ON OFF 5 ON OFF IEEE virgola mobile 5 3 2 5 3 2 5 3 2 5 3 2 5 3 2 Instrument programming Instrument programming Instrument programming Instrument programming Instrument programming Measurement paramete rs such as CT and VT values and the instrument s network address must Measurement paramete rs such as CT and VT values and the instrument s network address must Measurement paramete rs such as CT and VT values and the instrument s network address must Measurement paramete rs such as CT and VT values and the instrument s network address must Measurement paramete rs such as CT and VT values and the inst
27. energy with imagination DEC DEC DEC DEC DEC DEC3 DEC3 DEC3 DEC3 DEC3 DEPT DEPT DEPT DEPT DEPT EST EST EST EST EST 2 di 36 INDEX 1 1 Operator safety 5 1 2 Symbols 5 1 3 Precautions in case of breakdowns 5 2 1 Instrument description 6 2 2 DIN RAIL MOUNTING 6 2 3 POWER SUPPLY 6 2 4 VOLTAGE MEASUREMENT CONNECTION 7 2 4 1 THREE PHASE 3 WIRE DELTA NETWORK 7 2 4 2 THREE PHASE 4 WIRE STAR NETWORK 7 2 5 CURRENT MEASUREMENT CONNECTION 8 3 1 DEPT AND DEC WIRING DIAGRAMS 8 3 1 1 Single phase network
28. erface other than INT 485 is installed make sure it is fitted with resistor R If an interface other than INT 485 is installed make sure it is fitted with resistor R If an interface other than INT 485 is installed make sure it is fitted with resistor R If an interface other than INT 485 is installed make sure it is fitted with resistor R If an interface other than INT 485 is installed make sure it is fitted with resistor Rttttt and if not install and if not install and if not install and if not install and if not install one during the connection phase following the instructions in Fig 32 one during the connection phase following the instructions in Fig 32 one during the connection phase following the instructions in Fig 32 one during the connection phase following the instructions in Fig 32 one during the connection phase following the instructions in Fig 32 INT485 R t 1 2 n Fig 33 Fig 33 Fig 33 Fig 33 Fig 33 Fig 33 B Fig 33 B Fig 33 B Fig 33 B Fig 33 B Fig 33 A Fig 33 A Fig 33 A Fig 33 A Fig 33 A INT485 INT485 Fig 35 Fig 35 Fig 35 Fig 35 Fig 35 vs GN D SUPPLY RS485 Input RS485 Output DATA 0 DATA 0 DATA 1 D ATA 1 220 Vac 120 ohm 120 ohm Fig 34 Fig 34 Fig 34 Fig 34 Fig 34 Examples of a multiple instrument connection Examples of a multiple instrument connection Examples of a multiple instrument connection Examples of
29. h two screw terminals for the 4 20 mA output The output connection to recorders ammeters remote indicators etc must be made using a max cable size of 4 mm2 The output is galvanically isolated with a max load impedance of 500 The maximum digital to 4 20 mA conversion error is 0 2 of the measurement Connect the instrument taking care to follow the and signs on the label next to the output terminals The connection procedure is illustrated in Fig 24 below 5 1 4 5 1 4 5 1 4 5 1 4 5 1 4 Measurement reading Measurement reading Measurement reading Measurement reading Measurement reading The instrument output supplies a 4 to 20 mA current proportional to the measurement of the selected parameter dip switches 1 and 2 voltage Full Scale dip switches 4 and 5 and set current dip switch 6 for the CT multiplication factor DEPT 4 20 Single phase Single phase Single phase Single phase Single phase F S Voltage F S x Current F S x K Example VFS 500 V IFS 5 A CT 1000 5 K 200 PFS 500 kW Three phase Three phase Three phase Three phase Three phase F S Voltage F S x Current F S x 3 xK Example VFS 500 V IFS 5 A CT 1000 5 K 200 PFS 865 kW EST 4 20 F S Voltage F S x Current F S x 3 xK Example VFS 500 V IFS 5 A CT 1000 5 K 200 PFS 865 kW P Active power P Active power P Active power P Active power P Active
30. hase DEPT 4 20 Unbalanced Three phase 4 wire star or 3 wire delta EST 4 20 Voltage Full Scale selection 65V 125V 250V or 500V Current Full Scale selection 1A or 5A Integration period selection for average power calculations instantaneous 10 15 or 30 minutes Functions are easy to program using the 8 pole dip switch see Fig 22 shown in para 5 1 2 EST 4 20 DEPT 4 20 P Q P F S 1 ON O FF 2 1 O N O FF 2 1 O N O FF 2 1 ON O FF 2 3 ON O FF 3 ON O FF 3 ON O FF 3 ON O FF 65V 1 125V 1 250V 1 500V 1 4 ON O FF 5 O N O FF O N O FF ON O FF 4 5 4 5 4 5 Fig 23 Fig 23 Fig 23 Fig 23 Fig 23 5 1 2 5 1 2 5 1 2 5 1 2 5 1 2 Instrument programming Instrument programming Instrument programming Instrument programming Instrument programming The dip switches are protected by a plastic cover mounted on the instrument case This cover may be removed by inserting a screwdriver in the slot and prising off IMPORTANT IMPORTANT IMPORTANT IMPORTANT IMPORTANT Set the operating functions before powering up the unit Program setting changes made when the instrument is energised will not be accepted To change program settings power down the instrument and power up again Measurement selection Dip switches 1 2 Measurement selection Dip switches 1 2 Measurement selection Dip swit
31. ion with 2 CTs L1 and L2 Current signal connection with 2 CTs L1 and L2 Current signal connection with 2 CTs L1 and L2 Current signal connection with 2 CTs L1 and L2 IMPORTANT IMPORTANT IMPORTANT IMPORTANT IMPORTANT When connecting 2 CTs always follow the direction orientation of the CT current output as shown in the diagrams below Connection with 2 CTs in co generation mode Connection with 2 CTs in co generation mode Connection with 2 CTs in co generation mode Connection with 2 CTs in co generation mode Connection with 2 CTs in co generation mode Connection with 2 CTs L1 and L2 Connection with 2 CTs L1 and L3 Fig 15 Fig 15 Fig 15 Fig 15 Fig 15 L1 L3 L2 L1 L2 L3 Fig 16 Fig 16 Fig 16 Fig 16 Fig 16 Fig 17 Fig 17 Fig 17 Fig 17 Fig 17 L1 L2 L3 Fig 18 Fig 18 Fig 18 Fig 18 Fig 18 Fig 19 Fig 19 Fig 19 Fig 19 Fig 19 L1 L3 L2 L1 L2 L3 N 3 2 2 3 2 2 3 2 2 3 2 2 3 2 2 High voltage Three phase 3 wire delta network with CT and VT High voltage Three phase 3 wire delta network with CT and VT High voltage Three phase 3 wire delta network with CT and VT High voltage Three phase 3 wire delta network with CT and VT High voltage Three phase 3 wire delta network with CT and VT Voltage signal connection with 3 VTs Voltage signal connection with 3 VTs Voltage signal connection with 3 VTs Voltage signal connection
32. ios for direct readings Programmable CT and VT ratios for direct readings Programmable CT and VT ratios for direct readings Programmable CT and VT ratios for direct readings Programmable integration period for average Programmable integration period for average Programmable integration period for average Programmable integration period for average Programmable integration period for average power calculations power calculations power calculations power calculations power calculations Reset of Reset of Reset of Reset of Reset of Average Active Power Average Apparent Power Maximum Demand on Active Power Maximum Demand on Apparent Power Energy counters Peak values Integration period synchronisation signal for average power calculations Integration period synchronisation signal for average power calculations Integration period synchronisation signal for average power calculations Integration period synchronisation signal for average power calculations Integration period synchronisation signal for average power calculations The following functions are set using the 8 pole dip switch illustrated in Fig 29 below Transmission speed selection Transmission speed selection Transmission speed selection Transmission speed selection Transmission speed selection 2400 4800 or 9600 BAUD Connection type selection Connection type selection Connection type sel
33. istance 10 55 Hz Power Supply Power Supply Power Supply Power Supply Power Supply 200 240 VAC 10 50 60 Hz 100 120 VAC 10 50 60 Hz on request Consumption Consumption Consumption Consumption Consumption 3VA Reference standards Reference standards Reference standards Reference standards Reference standards Safety Safety Safety Safety Safety IEC 1010 and VDE 411 Class 2 with external cabinet Isolation VDE 0110 Class C Compatibility electromagnetic Compatibility electromagnetic Compatibility electromagnetic Compatibility electromagnetic Compatibility electromagnetic Immunity Immunity Immunity Immunity Immunity EN 50082 1 1992 EN 50082 2 1994 Emissions Emissions Emissions Emissions Emissions EN 55022 1988 class B Compliance with IEC 1036 directive Compliance with IEC 1036 directive Compliance with IEC 1036 directive Compliance with IEC 1036 directive Compliance with IEC 1036 directive energy measurement class 1 accuracy 4 2 Display specifications Measuring method Measuring method Measuring method Measuring method Measuring method Fixed sampling and analog digital conversion Sampling frequency Sampling frequency Sampling frequency Sampling frequency Sampling frequency 2400 Hz Number of samples per phas Number of samples per phas Number of samples per phas Number of samples per phas Number of samples per phase 240
34. limit is imposed by standards The 500 VAC limit is imposed by standards The 500 VAC limit is imposed by standards The Full Scale is 750 VAC The Full Scale is 750 VAC The Full Scale is 750 VAC The Full Scale is 750 VAC The Full Scale is 750 VAC 2 4 2 2 4 2 2 4 2 2 4 2 2 4 2 THREE PHASE 4 WIRE STAR NETWORK THREE PHASE 4 WIRE STAR NETWORK THREE PHASE 4 WIRE STAR NETWORK THREE PHASE 4 WIRE STAR NETWORK THREE PHASE 4 WIRE STAR NETWORK Y Fig 6 Fig 6 Fig 6 Fig 6 Fig 6 DEPT DEC DEC 485 P1 DEC3 DEC3 485 P1 P1 P1 P2 P2 P2 P2 P2 P2 P2 P1 P1 P1 EST L1 N S1 P1 P1 HI S2 P2 P2 LOW Fig 7 Fig 7 Fig 7 Fig 7 Fig 7 2 5 CURRENT MEASUREMENT CONNECTION The instruments are equipped with cable holes one for DEPT and DEC and three for EST and DEC 3 through which the current measurement cables must be fed uninterrupted Insert the current cables as shown in Fig 6 instructions are also given on the instrument label Use cables with max external diameter of 7 mm P1 and P2 in the following diagrams indicate the correct direction of the current The 500 VAC limit is imposed by standards The 500 VAC limit is imposed by standards The 500 VAC limit is imposed by standards The 500 VAC limit is imposed by standards The 500 VAC limit is imposed by standards The Full Scale is 750 VAC The Full Scale is 750 VAC The Full Scale is 7
35. lly corrects them except when CO GENERATION mode is selected using ELEXTOOL software 3 1 DEPT AND DEC WIRING DIAGRAMS 3 1 1 3 1 1 3 1 1 3 1 1 3 1 1 Single phase network Single phase network Single phase network Single phase network Single phase network The CT may be connected to both the phase and neutral S1 P1 P1 H I S2 P2 P2 LO W L1 L3 L2 Fig 8 Fig 8 Fig 8 Fig 8 Fig 8 S1 P1 P1 H I S2 P2 P2 LO W L1 L3 L2 Fig 10 Fig 10 Fig 10 Fig 10 Fig 10 L1 L2 L3 Fig 9 Fig 9 Fig 9 Fig 9 Fig 9 Fig 11 Fig 11 Fig 11 Fig 11 Fig 11 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 Balanced Three phase network Balanced Three phase network Balanced Three phase network Balanced Three phase network Balanced Three phase network The CT may be connected to any of the three phases selected by the user The phase matching between voltage and current signals must however always be observed I E Examples I L1 V L2 L3 I L2 V L3 L1 I L3 V L1 L2 3 1 3 3 1 3 3 1 3 3 1 3 3 1 3 High voltage network with CT and VT High voltage network with CT and VT High voltage network with CT and VT High voltage network with CT and VT High voltage network with CT and VT 3 2 EST DEC 3 and DEC3 485 WIRING DIAGRAMS 3 2 1 3 2 1 3 2 1 3 2 1 3 2 1 Three phase 3 wire delta network Three phase 3 wire delta
36. network Three phase 3 wire delta network Three phase 3 wire delta network Three phase 3 wire delta network Figures 10 11 12 13 14 14 A 15 16 and 17 indicate how to connect the voltage and current signal inputs 2 or 3 CTs in an unbalanced three phase 3 wire delta network without neutral Voltage signal connection Voltage signal connection Voltage signal connection Voltage signal connection Voltage signal connection Current signal connection with 3 CTs Current signal connection with 3 CTs Current signal connection with 3 CTs Current signal connection with 3 CTs Current signal connection with 3 CTs DEC 3 e DEC3 485 EST Fig 12 Fig 12 Fig 12 Fig 12 Fig 12 DEC 3 e DEC3 485 EST Fig 13 Fig 13 Fig 13 Fig 13 Fig 13 Fig 14 A Fig 14 A Fig 14 A Fig 14 A Fig 14 A Fig 14 Fig 14 Fig 14 Fig 14 Fig 14 Current signal connection with 2 CTs L1 and L3 Current signal connection with 2 CTs L1 and L3 Current signal connection with 2 CTs L1 and L3 Current signal connection with 2 CTs L1 and L3 Current signal connection with 2 CTs L1 and L3 IMPORTANT IMPORTANT IMPORTANT IMPORTANT IMPORTANT When connecting 2 CTs always follow the direction orientation of the CT current output as shown in the diagrams below Current signal connection with 2 CTs L1 and L2 Current signal connect
37. nnection Pulse output connection terminals max cable size 4 mm terminals max cable size 4 mm terminals max cable size 4 mm terminals max cable size 4 mm terminals max cable size 4 mm22222 Pulse output connection Pulse output connection Pulse output connection Pulse output connection Pulse output connection terminals max cable size 4 mm terminals max cable size 4 mm terminals max cable size 4 mm terminals max cable size 4 mm terminals max cable size 4 mm22222 Fig 28 Fig 28 Fig 28 Fig 28 Fig 28 5 2 5 5 2 5 5 2 5 5 2 5 5 2 5 DEC and DEC 3 counter labelling DEC and DEC 3 counter labelling DEC and DEC 3 counter labelling DEC and DEC 3 counter labelling DEC and DEC 3 counter labelling DEC and DEC 3 units feature a non resettable 7 digit electro mechanical counter mounted on the front panel A set of 9 labels is supplied with these instruments to facilitate pulse counter reading You can therefore customise the instrument by choosing the appropriate label for the selected parameter kWh kVAh or kvarh and CT primary range see Fig 28 and affixing it to the counter Example Selected parameter P Active Energy Power kWh P Active Energy Power kWh P Active Energy Power kWh P Active Energy Power kWh P Active Energy Power kWh Selected CT primary value 300 A 300 A 300 A 300 A 300 A In the example the required label is located in the kWh row selected parameter
38. one activated is reached approximately 25 of the scale in use Dimensions Dimensions Dimensions Dimensions Dimensions Length 105 mm 6 DIN modules 157 5 mm 9 DIN modules Height 90 mm Depth 58 mm Weight Weight Weight Weight Weight 0 5 Kg Protection clas Protection clas Protection clas Protection clas Protection class s s s s Instrument IP20 Front panel IP40 Temperature range Temperature range Temperature range Temperature range Temperature range 10 C to 60 C DEPT EST 10 C to 40 C DEC DEC 3 Relative humidity Relative humidity Relative humidity Relative humidity Relative humidity Max 90 Condensation Condensation Condensation Condensation Condensation Not permitted Isolation Isolation Isolation Isolation Isolation In compliance with group C VDE 0110 standards for 500 VACrms operating voltages Isolation resistance between terminals and outer casing 500 MW 500 MW 500 MW 500 MW 500 MW Isolation voltage between input connectors Isolation voltage between input connectors Isolation voltage between input connectors Isolation voltage between input connectors Isolation voltage between input connectors tested at 2000 Vrms at 50 Hz for 60 sec Vibration resistance Vibration resistance Vibration resistance Vibration resistance Vibration res
39. pacitors may still be charged even after it has been disconnected from all power sources Maintenance and or repairs must be carried out only by qualified authorized personnel If there is ever the suspicion that safe use is no longer possible the instrument must be taken out of service and precautions taken against accidental use Operation is no longer safe when 1 There is clealy visible damage 2 The instrument no longer functions 3 After lengthy storage in unfavorable conditions 4 After serious damage incurred during transport 1 1 Operator safety Read these pages carefully before installing and utilising the instrument Read these pages carefully before installing and utilising the instrument Read these pages carefully before installing and utilising the instrument Read these pages carefully before installing and utilising the instrument Read these pages carefully before installing and utilising the instrument The instrument described in this user manual is intended for use by properly trained staff only Maintenace and or repairs must be carried out only by authorized personnel For proper safe use of the instrument and for maintenace and or repair it is essential that the persons instructed to carry out these procedures follow normal safety precautions 1 2 Symbols READ THE INSTRUCTIONS 1 3 Precautions in case of breakdowns If it is suspected that the instrument is no longer safe for example due to dam
40. plicable to each phase RMS Phase Current applicable to each phase RMS Phase Current applicable to each phase Active Phase Power applicable to each phase Active Phase Power applicable to each phase Active Phase Power applicable to each phase Active Phase Power applicable to each phase Active Phase Power applicable to each phase Apparent Phase Power applicable to each Apparent Phase Power applicable to each Apparent Phase Power applicable to each Apparent Phase Power applicable to each Apparent Phase Power applicable to each phase phase phase phase phase Reactive Phase Power applicable to each phase Reactive Phase Power applicable to each phase Reactive Phase Power applicable to each phase Reactive Phase Power applicable to each phase Reactive Phase Power applicable to each phase Fig 22 Fig 22 Fig 22 Fig 22 Fig 22 V V V V 3 12 23 31 3 3 V V V V 3 12 23 31 3 3 3 3 3 Three phase Power Factor Three phase Power Factor Three phase Power Factor Three phase Power Factor Three phase Power Factor Three phase Voltage Three phase Voltage Three phase Voltage Three phase Voltage Three phase Voltage Three phase Voltage Three phase Voltage Three phase Voltage Three phase Voltage Three phase
41. power S Apparent power S Apparent power S Apparent power S Apparent power S Apparent power Q Reactive power Q Reactive power Q Reactive power Q Reactive power Q Reactive power P F Cos P F Cos P F Cos P F Cos P F Cos Power factor Power factor Power factor Power factor Power factor 5 2 DEPT P DEC EST P and DEC 3 DEPT P DEC EST P and DEC 3 units are electrical parameter transducers with a pulse output specially designed as a PLC or PC interface in automation systems process control consumption monitoring electrical energy cost optimisation and AC DC load driving applications 5 2 1 Functions available 5 2 1 Functions available 5 2 1 Functions available 5 2 1 Functions available 5 2 1 Functions available Measurement selection Active Energy Apparent Energy Inductive Reactive Energy Capacitive Reactive Energy Connection type selection Single phase or balanced Three phase DEPT P and DEC Three phase 4 wire star or 3 wire delta EST P and DEC 3 Current Full Scale selection 1 A or 5 A Fig 26 Fig 26 Fig 26 Fig 26 Fig 26 400 500 m Sec 400 500 m Sec P Qcap cap cap cap cap Qind ind ind ind ind S 1 ON O FF 2 1 O N O FF 2 1 O N O FF 2 1 ON O FF 2 Fig 25 Fig 25 Fig 25 Fig 25 Fig 25 DEC 3 DEPT P D
42. r if more than 32 instruments are installed The PC is equipped with an RS232 interface A RS232 RS485 converter must therefore be used to connect the twisted pair the cables are identified by the letters A and B Connect a line termination resistor RT 100 120 between the two twisted pair cables leading from the converter at the end of the network last instrument connected The instruments must be connected to the twisted pair so that the terminals marked A instrument label are connected to cable A red and the terminals marked B are connected to cable B white at the output of the RS232 RS485 converter See Fig 31 R t Fig 31 Fig 31 Fig 31 Fig 31 Fig 31 Fig 32 Fig 32 Fig 32 Fig 32 Fig 32 R t 5 3 6 5 3 6 5 3 6 5 3 6 5 3 6 Shielded twisted pair connection Shielded twisted pair connection Shielded twisted pair connection Shielded twisted pair connection Shielded twisted pair connection If the environment in which the instruments are installed is prone to interference or strong currents the connection must be made using a shielded twisted pair 2x0 25 Line amplifiers must be used if the distance between the PC and instruments exceeds 1000 m or if more than 32 instruments are installed The PC is equipped with an RS232 interface A RS232 RS485 converter must therefore be used to connect the twisted pair the cables are identified by the letters
43. re reception procedure reception procedure reception procedure reception procedure Factory setting ADDRESS 27 DATA FORMAT BCD BAUD 4800 DATA BIT 8 STOP BIT 2 NO PARITY DEPT 485 and EST 485 units use a data communication system based on MODBUS protocol MODBUS functions and the use of registers are detailed in a special technical document available on request from ELECTREX S r l 5 3 4 5 3 4 5 3 4 5 3 4 5 3 4 Output connection Output connection Output connection Output connection Output connection The instrument is equipped with three terminals for connection of the output to the RS485 interface Fig 30 The output connection must be made using a twisted pair The instrument is also equipped with a terminal for connection of the shield sheath required for network installations in environments prone to heavy interference or strong currents Use a twisted pair cable with minimum cross section of 0 36 mm2 22 AWG and capacity of less than 60 pF m ie BELDEN cable type EIA RS485 Ref 3105 A 5 3 5 5 3 5 5 3 5 5 3 5 5 3 5 Twisted pair connection Twisted pair connection Twisted pair connection Twisted pair connection Twisted pair connection If the environment in which the instruments are installed is not prone to interference or strong currents the connection may be made using an unshielded twisted pair Line amplifiers must be used if the distance between the PC and instruments exceeds 1000 m o
44. rument s network address must be programmed using MODBUS functions or more simply the ELEX program supplied by ELECTREX be programmed using MODBUS functions or more simply the ELEX program supplied by ELECTREX be programmed using MODBUS functions or more simply the ELEX program supplied by ELECTREX be programmed using MODBUS functions or more simply the ELEX program supplied by ELECTREX be programmed using MODBUS functions or more simply the ELEX program supplied by ELECTREX IMPORTANT IMPORTANT IMPORTANT IMPORTANT IMPORTANT Set the operating functions before powering up the unit Program setting changes made when the instrument is energised will not be accepted To change program settings power down the instrument and power up again Transmission speed selection Dip switches 1 2 Transmission speed selection Dip switches 1 2 Transmission speed selection Dip switches 1 2 Transmission speed selection Dip switches 1 2 Transmission speed selection Dip switches 1 2 Three transmission speeds 2400 4800 and 9600 BAUD may be selected using dip switches 1 and 2 Connection type selection Connection type selection Connection type selection Connection type selection Connection type selection Dip switch 3 Dip switch 3 Dip switch 3 Dip switch 3 Dip switch 3 Select the required connection type by setting dip switch 3 as shown below Data format selection Dip switch 4 Data format selection
45. ver 1000 m from the PC The amplifier connection is illustrated in Fig 35 below Amplifier Amplifier energy with imagination Via Claudia 96 41056 Savignano sul Panaro MO Italy Tel 39 59 796372 Fax 39 59 796378 WARNING ELECTREX declines any liability for damages to property or persons due to improper use or misuse of the product SUBJECT TO CHANGES WITHOUT PRIOR NOTICE MANUAL CODE
46. with 3 VTs Voltage signal connection with 3 VTs Voltage signal connection with 2 VTs Voltage signal connection with 2 VTs Voltage signal connection with 2 VTs Voltage signal connection with 2 VTs Voltage signal connection with 2 VTs IMPORTANT IMPORTANT IMPORTANT IMPORTANT IMPORTANT Any one of the delta vertices may be earthed Voltage signal connection with 2 VTs Voltage signal connection with 2 VTs Voltage signal connection with 2 VTs Voltage signal connection with 2 VTs Voltage signal connection with 2 VTs Current signal connection Current signal connection Current signal connection Current signal connection Current signal connection For the connection of CTs in medium or high voltage networks follow the same procedure described for low voltage connections 3 2 3 2 3 2 3 2 3 2 33333 Three phase 4 wire star network Three phase 4 wire star network Three phase 4 wire star network Three phase 4 wire star network Three phase 4 wire star network Figures 18 and 19 below indicate how to connect voltage and current signal inputs in an unbalanced three phase 4 wire star network Voltage signal connection Voltage signal connection Voltage signal connection Voltage signal connection Voltage signal connection Voltage signal connection with 3 VTs Voltage signal connection with 3 VTs Voltage signal connection with 3 VTs Voltage signal connection with 3 VTs Voltage signal connection with 3 VTs YYYYY
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