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OPERATING AND MAINTENANCE MANUAL
Product:
Type:
DESIGNED AND MANUFACTURED BY:
T & R Test Equipment Limited
15-16 Woodbridge Meadows, Guildford, Surrey, GU1 1BJ, United Kingdom
Telephone: 01483 207428
Fax.:
01483 511229
Primary Current Injection System
PCU2 mk5
LU5000, LU6000, LU8000
1
e-mail:
sales@trtest.com
Web:
www.trtest.com
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Summary of Contents for T&R PCU2 mk5
- Page 1 OPERATING AND MAINTENANCE MANUAL Product: Primary Current Injection System Type: PCU2 mk5 LU5000, LU6000, LU8000 DESIGNED AND MANUFACTURED BY: T & R Test Equipment Limited 15-16 Woodbridge Meadows, Guildford, Surrey, GU1 1BJ, United Kingdom Telephone: 01483 207428 e-mail: sales@trtest.com Fax.:...
- Page 3 GENERAL SAFETY STATEMENT WARNING The following safety precautions should be reviewed to avoid injury to the user and damage to the product (and other products connected to it). To avoid potential hazards only use this product as specified. Only suitably qualified personnel should use this equipment. Servicing of this product should only be carried out by suitably qualified service personnel.
- Page 4 SAFETY TERMS AND SYMBOLS The following safety symbols may appear on the equipment: CAUTION/WARNING – Refer to manual CAUTION – Hot. Parts may become hot during use – ensure parts are cool before touching. Mains off Mains on The following safety symbols may appear in this manual: This action or procedure may be dangerous if not carried CAUTION out correctly, and may cause damage to the equipment or...
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Page 5: Table Of Contents
CONTENTS DESCRIPTION OF EQUIPMENT Front Panel Layout 1.1.1 Loading unit 1.1.2 Control unit Electrical Specification 1.2.1 Supply Specifications 1.2.2 Output Specifications 1.2.3 Output Lead Set Ratings 1.2.4 Metering 1.2.5 Overload trip 1.2.6 Loading unit over temperature trip 1.2.7 Timing System Construction Installation OPERATION... - Page 6 3.2.1 Timer Mode 3.2.2 Connections 3.2.3 Test Procedure Timing Devices with NO Auxiliary Contacts 3.3.1 Timer Mode 3.3.2 Connections 3.3.3 Test Procedure MAINTENANCE ACCESSORIES Standard Accessories Optional Accessories OVERALL PERFORMANCE SPECIFICATION REVISION...
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Page 7: Description Of Equipment
DESCRIPTION OF EQUIPMENT The PCU2 is a primary current injection system designed to be used in conjunction with a T&R Test Equipment loading transformer. Depending on the loading unit used, currents up to 6000A are available for 5 minutes and 12kA for 1 second. Accurate true rms metering facilities and a flexible timing system are provided. -
Page 8: Front Panel Layout
Front Panel Layout Figure 1.1 PCU2 and loading unit front panels... -
Page 9: Loading Unit
1.1.1 Loading unit ITEM FUNCTION Output terminals High current output to object under test Caution – the output terminals and test leads may become hot during use. Power input Power input from control unit Metering output Metering output to control unit 1.1.2 Control unit ITEM... -
Page 10: Electrical Specification
Electrical Specification 1.2.1 Supply Specifications Supply voltage: 230V 10% Single phase, 50/60Hz Maximum power requirement 23kVA 5 min on/15 min off 44kVA overload 1 second 1.2.2 Output Specifications Current Current Output Loading arrangem Voltage 5 min on/ 5 sec on/ 1 sec on/ Unit Continuous... -
Page 11: Output Lead Set Ratings
1.2.3 Output Lead Set Ratings The optional 3000AL, 4000AL, 5000AL, 6000AL lead sets supplied for use with the PCU2 are made up from a number of 70mm cores and have different continuous and intermittent ratings. The rating is also affected by the arrangement of the individual 70mm cables making up the high current cable. -
Page 12: Overload Trip
Parallel High 12.00kA 0.6% 6d If the metering cable is not connected between the PCU2 MK5 control unit and the external loading unit, the ammeter will not function and the output will not switch on. 1.2.5 Overload trip The output of the unit is protected by an overload trip that operates at approximately 115% of full load current. -
Page 13: Loading Unit Over Temperature Trip
100mA. Construction The PCU2 MK5 control unit is housed in a robust steel case with castors for mobility. The front panel is protected by a steel cover which is fixed to the main case with catches. The unit is also fitted with steel handles at each end of the main chassis. - Page 14 Before installation, a suitable mains connector must be connected to the 3-core mains input cable provided. The connector and supply must be rated for 100A. It is also important to ensure that the unit is adequately earthed. It is suggested that the earth stud on the side of the unit is connected to a low impedance local earth.
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Page 15: Operation
OPERATION This chapter describes how to use the PCU2 and loading unit in a variety of applications. Specific examples are given in the applications section. The interconnections between the control unit and loading unit are shown in figure 2.2. Loading Unit Configuration The loading units have two output windings which may either be connected in parallel or series, allowing the output to be configured for a higher current with a lower voltage or a lower current with a higher voltage. -
Page 16: Main Output
The current and voltage available from each loading unit in series or parallel mode is shown below. Current Current Loading Output Voltage 5 min on/ 5 sec on/ 1 sec on/ arrangement Unit Continuous 15 min off 1 min off 1 min off Series 1250A... -
Page 17: Connections
Connections The connections between the PCU2 and loading unit are shown in figure 2.2. LOADING UNIT OUTPUT TERMINAL OUTPUT CONTROL UNIT OUTPUT TERMINAL LU5000 METERING CONNECTION LOADING UNIT POWER CONNECTION MAINS SUPPLY CONTROL UNIT Figure 2.2 PCU2 and loading unit connections WARNING It is vital to ensure that secure, low impedance connections are made between the output of the loading unit and the object under test. -
Page 18: Timing System
Timing System The PCU2 timing system is very flexible, and is closely integrated with the main output. A summary of the start and stop events for the timer is shown in the table below. Timer Mode Timer Start Condition Timer Stop Condition Internal Start Main output on Contact set 1 change... -
Page 19: General Procedure For Timing Tests
2.4.1.5 Timer Mode: Current Operated Current operated mode is used to time devices that have contacts in series with the current sense element. This includes many types of circuit breakers and trips. The timer is started when the output current exceeds 20% of full scale of the selected metering range, and stops when the current falls below this threshold. -
Page 21: Application Notes - Testing Specific Devices
APPLICATION NOTES – TESTING SPECIFIC DEVICES Over-current Devices with Auxiliary Contacts 3.1.1 Timer Mode DEVICE UNDER Internal start TEST 3.1.2 Connections Connect current output from loading unit to desired input on device under test. Connect aux contact on device under test to contact set 1 on PCU2. -
Page 22: Timing Of Auto-Reset/Reclosing Devices
Timing of auto-reset/reclosing devices 3.2.1 Timer Mode DEVICE UNDER Single contact TEST 3.2.2 Connections Connect current output from loading unit to desired input on device under test. Connect aux contact on device under test to contact set 1 on PCU2. 3.2.3 Test Procedure Switch on the main supply switch. -
Page 23: Timing Devices With No Auxiliary Contacts
Timing Devices with NO Auxiliary Contacts 3.3.1 Timer Mode DEVICE UNDER Current Operated TEST 3.3.2 Connections Connect current output from loading unit to desired input on device under test. 3.3.3 Test Procedure Switch on the main supply switch. Set timer mode switch to the off position. -
Page 24: Maintenance
MAINTENANCE The variable transformer brushes should be regularly examined for excessive wear. The brushes should be replaced if wear is apparent. Replacement brushes are available from T&R Test Equipment, stock number SPA-0110. The intervals between inspection and renewal of the brushes will depend upon the amount of usage. -
Page 25: Accessories
ACCESSORIES Standard Accessories Spare fuses: 1 off 100A A3 2 off F250mA 20mm 2 off T3.15A 1¼ inch Leads: 2.5 metre long supply cable terminated at one end to suit the input into the PCU2 control unit. 5 metre long interconnecting lead terminated at both ends to suit the PCU2 control unit and the external loading unit. -
Page 27: Overall Performance Specification
OVERALL PERFORMANCE SPECIFICATION Insulation Resistance at 1000V DC The insulation resistance will not be less than 10MΩ between mains input to frame and all isolated outputs, and all combinations of isolated output to isolated output. Applied Voltage Test Mains input to frame and all isolated outputs 2kV RMS for 1 minute. All combinations of isolated output to isolated output Isolated output to frame 1.5kV RMS for 1 minute. -
Page 29: Revision
REVISION Product / Type: Primary Current Injection / PCU2 MK5 & Loading Units File: PCU2 MK5 manual v2.doc Author: I Lake Issue / Date: 2 / 24.06.2013 Modified By: T Clark Checked By: P Cole Date: 24.06.2013... - Page 30 Drawings Required A2/001660 latest issue...
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