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T&R PCU1 Series, Operating And Maintenance Manual

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1 

 

OPERATING AND MAINTENANCE MANUAL 

 

 

 

Product:

 

Primary Current Injection System 

Type: 

PCU1-SP mk2 

PCU1-LT mk2 

 

 

DESIGNED AND MANUFACTURED BY: 

T & R Test Equipment Limited 

15-16 Woodbridge Meadows, Guildford, Surrey, GU1 1BJ, United Kingdom 
Telephone:   01483 207428 

e-mail: 

[email protected] 

Fax.:            01483 511229 

Web: 

www.trtest.com

 

Summary of Contents for PCU1 Series

Page 1: ...rent Injection System Type PCU1 SP mk2 PCU1 LT mk2 DESIGNED AND MANUFACTURED BY T R Test Equipment Limited 15 16 Woodbridge Meadows Guildford Surrey GU1 1BJ United Kingdom Telephone 01483 207428 e mai...

Page 2: ...gs information before making connections to any terminal It is ESSENTIAL to consult the product manual for rating information before making any connection to a terminal or terminal group marked with a...

Page 3: ...anual CAUTION This action or procedure may be dangerous if not carried out correctly and may cause damage to the equipment or connected equipment WARNING This action or procedure may cause injury or d...

Page 4: ......

Page 5: ...5 Timing System 18 1 4 Displayed Values and Messages 19 1 4 1 Displayed Values 19 1 4 2 Warning Messages 19 1 5 Primary Current Injection Lead Sets 21 1 5 1 Description 21 1 5 2 Factors Affecting Maxi...

Page 6: ...1 Timer Mode 34 3 2 2 Connections 34 3 2 3 Test Procedure 34 3 2 4 Using Pulse Mode to Set the Current 34 3 3 Timing of Auto reset Reclosing Devices PCU1 SP LT 35 3 3 1 Timer Mode 35 3 3 2 Connection...

Page 7: ...Control Brushes 41 4 2 Removal of the PCU1 from Case 41 5 STANDARD ACCESSORIES 43 5 1 Spare Fuses Supplied 43 5 2 Standard Accessories Supplied 43 6 OVERALL PERFORMANCE SPECIFICATION 45 6 1 Insulatio...

Page 8: ......

Page 9: ...V range or 1250A on the 9 2V range The control units are rated at 11 5kVA All metering is digital and a memory facility is provided to hold the current reading when the output trips or is switched off...

Page 10: ...10 1 1 Control Unit Front Panel Layout and Functions Figure 1 1 PCU1 SP mk2 front panel layout A B C D E F G H I J K L M N O P Q R S T...

Page 11: ...Connect to local earth I Fuse Fuse for metering and control circuits J RS232 connector Serial connection for PC printer connection K T R link connector Output to phase lock DVS3 mk2 to PCU1 L Main out...

Page 12: ...PCU1 metering connection Metering control connection to control unit B Power connector Power supply from control unit C Tap 3 output Highest voltage lowest current output 1250A 9 2V on NLU5000 D Tap 2...

Page 13: ...mon output Output common terminal One of the output leads is always connected to this terminal D Tap 1 output Highest current lowest voltage output 200A 60V E Tap 2 output Highest voltage lowest curre...

Page 14: ...5 minutes 30A 5000A 40 seconds 50A 4 6V 1500A 5 minutes 30A 2500A 40 seconds 50A 9 2V 750A 5 minutes 30A 1250A 40 seconds 50A NLU2000 3 5V 1200A 5 minutes 18A 2000A 40 seconds 30A 6 9V 600A 5 minutes...

Page 15: ...rrent and also for higher intermittent currents The maximum on time for intermittent currents is enforced by the unit and the output will be switched off if the rating is exceeded The display will the...

Page 16: ...nify the end of a test the last valid current before the contacts changed state is held This also holds true for the current operated timer mode The ammeter will capture and calculate the rms of a sin...

Page 17: ...CT polarity Fwd Rev Indicates the polarity of a CT connected between the current output primary and auxiliary current input secondary CT ratio 5A 5000 5A Displays the ratio of a 5A CT connected betwee...

Page 18: ...s 0 99999 9s 1ms 10ms 100ms 0 01 rdg 2d Single contact 0 01 rdg 2d Dual contact 0 01 rdg 2d Current operated 0 01 rdg 4d In current operated mode timing results obtained with test currents below 20 of...

Page 19: ...n 1 4 2 Warning Messages In addition to the normal display screens the PCU1 systems can display a range of warning messages if the unit trips on over current or duty cycle or is too hot internally If...

Page 20: ...ng unit power lead plugged in to PCU1 Connect Loading Unit Green to continue Figure 1 9 Primary injection selected with loading unit not connected Press Green to continue Figure 1 10 Loading unit faul...

Page 21: ...2000NAL 280mm2 2 3000NAL 420mm2 4 4000NAL 560mm2 4 The 2000NAL lead set consists of one pair of leads that are connected between the NLU and the load as shown in figure 1 11 Figure 1 11 2000NAL conne...

Page 22: ...njected into the load The cross sectional area of the leads and the lead layout have a large effect on impedance Figure 1 10 shows the effect of lead layout on the maximum current obtainable from a PC...

Page 23: ...5000A From this table it can be seen that the maximum output current is not available with all combinations of lead sets and lengths In particular 5000A output current is only achievable using very s...

Page 24: ...PCU1 SP is fitted with a range of over protection devices Location Protection Mains supply Circuit breaker Main output Circuit breaker Electronic over current trip Electronic duty cycle trip Thermal p...

Page 25: ...to 5000A It is also essential to ensure that the unit is adequately earthed WARNING Ensure that the unit is adequately earthed If necessary an extra earth connection may be made between the earth ter...

Page 26: ...solation from the mains MAINS SUPPLY OUTPUT TO LOAD Figure 2 1 Connection between control unit and loading unit PCU1 SP and NLU5000 shown The main output is switched on and off using the on and off pu...

Page 27: ...nnect the supply lead to the mains and switch the supply circuit breaker on The supply on lamp should now illuminate 2 1 2 Testing Always start the first test with the output control knob at zero to e...

Page 28: ...tched off and the test object is isolated and grounded before making any connections Connect the test object as shown in figure 2 2 The contact timer connections will vary depending on the device type...

Page 29: ...ng Dual Contact 1st change C1 C1 change C2 change C2 change timer stop Dual Contact 1st change C2 C2 change C1 change C2 change timer start Auto reclose relay Current Operated Current 20 of selected m...

Page 30: ...mode is ideally suited to timing auto reclose relays If a single contact mode is required where the output remains on until the second change of contact this may be achieved by using single contact mo...

Page 31: ...2 General Procedure for Timing Tests The procedure for timing is the same whether an external loading unit is connected or the secondary current injection output from the PCU1 is used 2 4 2 1 Connecti...

Page 32: ...the output off push button Connect the test object contacts to the contact terminals on the test set select the internal start timer mode If the test object has no auxiliary contacts e g thermal break...

Page 33: ...rip contacts on relay under test to contact set 1 on the PCU1 3 1 3 Test Procedure Switch on the main supply switch Set the metering range switch to the most appropriate secondary injection range 10A...

Page 34: ...o the off position Ensure that the output control is in the zero position Check that connections are made as above Press the output on push button and increase the current to the desired level Press t...

Page 35: ...re Switch on the main supply switch Set timer mode switch to the off position Ensure that the output output control is in the zero position Check that connections are made as above Press output on pus...

Page 36: ...supply switch Set timer mode switch to the off position Ensure that the output control is in the zero position Check that connections are made as above Press output on push button and adjust output c...

Page 37: ...to closed or vice versa The timer will stop when the contacts return to their original state 3 6 Using the Control Unit as a Dual Contact Timer PCU1 SP LT 3 6 1 Timer Mode Dual contact 3 6 2 Connecti...

Page 38: ...1 connects to COM input 3 7 3 Test Procedure Switch on the main supply switch Set timer mode switch to the off position Ensure that the output control is in the zero position Check that connections ar...

Page 39: ...ry to PCU1 SP auxiliary metering input S1 S2 3 8 3 Test Procedure Switch on the main supply switch Set timer mode switch to the off position Ensure that the output control is in the zero position Chec...

Page 40: ...40...

Page 41: ...f usage particularly at very high currents However it should be remembered that damage to the output control can result if the brushes are allowed to wear away to such an extent that a loss of brush p...

Page 42: ......

Page 43: ...metre long supply cable terminated at one end to suit the PCU1 control unit mains input b 5 metre long interconnecting lead terminated at both ends to supply power from the control unit to the loadin...

Page 44: ......

Page 45: ...ame and all isolated outputs 2kV RMS for 1 minute All isolated inputs outputs 1 5kV RMS for 1 minute 6 3 Accuracy of Instruments 6 3 1 Loading Unit Current Output Loading unit Metering range Metering...

Page 46: ...V RMS 300 0V 0 7 rdg 5d 5 000A RMS 5 000A 0 7 rdg 5d 6 3 4 Timing System Timer mode Range Resolution Accuracy Internal start 0 999 999s 9999 99s 99999 9s 1ms 10ms 100ms 0 01 rdg 2d Single contact 0 99...

Page 47: ...EVISION Product Type Primary Current Injection PCU LT SP mk2 NLU Loading Units File PCU1 LT SP mk2 manual v3 doc Author I D W Lake Issue Date 4 02 05 19 Modified By K Smith Checked By G Biggs Date 03...

Page 48: ...48 Drawings Required A3 001753 latest issue PCU1 SP mk2 A3 001755 latest issue PCU1 LT mk2...

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