T&R CU-Ps Operating And Maintenance Manual
  1. Manuals
  2. Brands
  3. T&R Manuals
  4. Test Equipment
  5. CU-Ps
  6. Operating and maintenance manual

T&R CU-Ps Operating And Maintenance Manual

Primary current injection system
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
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
Web: www.trtest.com
Primary Current Injection System
CU-Ps and PLU-5k or PLU-6k
1
e-mail:
sales@trtest.com

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the CU-Ps and is the answer not in the manual?

Questions and answers

Related Manuals for T&R CU-Ps

Summary of Contents for T&R CU-Ps

  • Page 1 OPERATING AND MAINTENANCE MANUAL Product: Primary Current Injection System Type: CU-Ps and PLU-5k or PLU-6k 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 Web: www.trtest.com...
  • Page 2 Warnings from cardiac pacemaker manufacturers state that strong magnetic fields may affect operation. Any high current unit such as the CU-Ps should therefore not be operated by, or in the vicinity of persons fitted with cardiac pacemakers or any other electronic or electrical medical implants.
  • Page 3 SAFETY TERMS AND SYMBOLS The following safety symbols appear on the equipment: CAUTION/WARNING – Refer to manual HOT – Refer to manual Mains off Mains on The following safety symbols 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 connected equipment.

  • Page 5: Table Of Contents

    CONTENTS DESCRIPTION OF EQUIPMENT Control Unit Front Panel Layout and Functions Loading Unit Front Panel Layout Electrical Specification 1.3.1 Supply Requirements 1.3.2 Loading Unit Outputs 1.3.3 Secondary Injection Output 1.3.4 Metering 1.3.5 Timing System Displayed Values and Messages 1.4.1 Displayed Values 1.4.2 Warning Messages Primary Current Injection Lead Sets...
  • Page 6 2.3.1 Timer Modes 2.3.2 General Procedure for Timing Tests Storage of results 2.4.1 USB key 2.4.2 Setting the clock 2.4.3 Entering a comment 2.4.4 Auto-store 2.4.5 Waveform storage 2.4.6 File formats 2.4.7 Viewing results APPLICATION NOTES – TESTING SPECIFIC DEVICES Secondary Injection of an Over-Current Relay 3.1.1 Timer Mode...
  • Page 7 Modes & Settings 3.8.2 Connections 3.8.3 Test Procedure MAINTENANCE Output Control Brushes Removal of the CU-Ps from Case STANDARD ACCESSORIES Spare Fuses Supplied Standard Accessories Supplied Optional Accessories Supplied OVERALL PERFORMANCE SPECIFICATION Insulation Resistance at 1000V DC Applied Voltage Test Accuracy of Instruments 6.3.1...
  • Page 8 REVISION...

  • Page 9: Description Of Equipment

    The CU-Ps system has a high accuracy timing system, allowing timing tests to be carried out to a resolution of 1ms. Selection for normally open or normally closed contacts is automatic, and the status of the contacts is shown on the front panel.

  • Page 10: Control Unit Front Panel Layout And Functions

    Control Unit Front Panel Layout and Functions Figure 1.1 CU-Ps front panel layout...
  • Page 11 Secondary output circuit breaker Protection for secondary current output PLU metering connection Metering/control connection to loading unit Metering range/output selection Selects between outputs on CU-Ps switch (primary/secondary injection) and metering range Primary output circuit breaker Protection for primary current output...

  • Page 12: Loading Unit Front Panel Layout

    Loading Unit Front Panel Layout The CU-Ps system is available with a range of optional loading units and output lead sets. The loading unit is connected to the control unit using a metering cable and a power cable. The load is connected between the terminals 1&5 and 4&8.
  • Page 13 Used to connect terminals for Series and Parallel Modes Series Mode Diagram Diagram to show how to connect Links for Series Mode Output Terminals High current output to object under test CU-Ps metering connection Metering/control connection to control unit Terminal Numbers Numbers to identify terminals...

  • Page 14: Electrical Specification

    1.3.1 Supply Requirements The CU-Ps systems require a single phase 50/60Hz supply of 230V±10%. The maximum power requirement of the system depends on the level of current to be drawn from the control unit. For maximum output a 63A supply is required.
  • Page 15 Re-configure the links as required, and then replace the output terminal plates and nuts. Ensure that all the nuts are tightened. The user selects whether the PLU loading unit is in Parallel or Series mode on the CU-Ps control unit when: ...
  • Page 16 *open circuit voltage at 230V mains The main output from the CU-Ps control unit is a 0-230V supply rated at 100A for 5 minutes on/15 minutes off. This output is NOT isolated from the mains and is not designed to be used without an isolating loading unit.

  • Page 17: Secondary Injection Output

    1.3.3 Secondary Injection Output The CU-Ps has two secondary injection outputs capable of injecting up to 100A without the use of a loading unit. The secondary injection output is selected using the metering range select switch. Current...
  • Page 18 PLU-5k 1250A 0.5%rdg+5d 1275A 100% 2500A 0.5%rdg+5d 2625A 300.0A 0.5%rdg+5d 315A PLU-6k 1500A 0.5%rdg+5d 1575A 100% 3000A 0.5%rdg+5d 3150A 1.3.4.3 Secondary Injection Output Ammeter Ranges Ammeter Unit Accuracy Trip current range 10.00A ±0.5%rdg±5d 10.5A CU-Ps 20.00A ±0.5%rdg±5d 100.0A ±0.5%rdg±5d 105A...
  • Page 19 1.3.4.4 Auxiliary Meter Ranges The CU-Ps has an auxiliary metering input with 300V/5A inputs. This can additionally measure the phase angle between output current and auxiliary input or the ratio between output current and auxiliary current. Two inputs are provided, one for voltages up to 300V and the other for currents up to 5A. The input in use is automatically selected by the unit.
  • Page 20 Auxiliary metering Full scale Function range 300.0V/5.000A Displays the RMS voltage or current of the signal connected to the input Accuracy ±0.7%rdg±5d 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...

  • Page 21: Timing System

    1.3.5 Timing System The CU-Ps systems are fitted with an integrated timing system linked to the output and the two sets of contact inputs. The system is highly flexible and allows for the timing of all common protection devices and trips. The timer may also be used to time external events not linked to the output of the set.

  • Page 22: Displayed Values And Messages

    1.4.2 Warning Messages In addition to the normal display screens, the CU-Ps systems can display a range of warning messages if the unit trips on over-current or duty cycle or is too hot internally. If an over current or duty cycle trip occurs, the green OFF push-button must be pressed to clear the trip condition.
  • Page 23 Figure 1.4.4 Unit over temperature warning message Remove Loading Unit OFF to continue Figure 1.4.5 Secondary injection selected with loading unit power lead plugged in to CU-Ps Connect Loading Unit OFF to continue Figure 1.4.6 Primary injection selected with loading unit not connected...

  • Page 24: Primary Current Injection Lead Sets

    Primary Current Injection Lead Sets 1.5.1 Description The optional 3000AL, 4000AL, 5000AL, 6000AL lead sets supplied for use with the CU-Ps are made up from several 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 25: Factors Affecting Maximum Output Current

    The cross-sectional area of the leads and the lead layout have a large effect on impedance. Figure 1.5 shows the ideal lead layout for the maximum current obtainable from a CU-Ps and PLU-6k with a 3m 5000AL output lead set.

  • Page 26: Overload Protection

    Construction The CU-Ps 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 27: Installation

    Installation The CU-Ps and associated loading units are designed for use in an indoor environment. 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.

  • Page 28: Operation

    OPERATION This chapter describes how to use the CU-Ps systems in a variety of applications. Specific examples are given in the applications section. Primary Current Injection with Loading Unit The connections between the CU-Ps and loading unit are shown in figure 2.1.

  • Page 29: Connections

    CAUTION If the supply earth to the CU-Ps is of doubtful integrity, the earth terminal on the CU-Ps should be connected to a solid local earth. The loading unit output from the CU-Ps control unit is ONLY for connection to a T&R Test Equipment PLU series loading unit.

  • Page 30: Testing

    2.1.2 Testing Always start the first test with the output control knob at zero to ensure that the test object is not subjected to an unintentional over-current. Switch the output on using the ON pushbutton and then increase the output current to the desired test current.

  • Page 31: Secondary Current Injection

    Secondary Current Injection The secondary current injection output of the CU-Ps allows currents of up to 100A to injected for testing relays and trips. To use the secondary injection output the loading unit power and metering leads must be disconnected and one of the secondary injection metering ranges selected.

  • Page 32: Testing

    2.2.2 Testing Always start the first test with the output control knob at zero to ensure that the test object is not subjected to an unintentional over-current. Switch the output on using the ON push-button and then increase the output current to the desired test current.

  • Page 33: Timing System

    Figure 2.3 Timing Sockets and Timing Mode Selector The CU-Ps timing system is closely integrated with the main output and is very flexible. A summary of the start and stop events for the timer is shown in the following table:...

  • Page 34: Timer Modes

    The timer resets automatically when the output ON push-button is pressed. In each mode that the timer is active, the output of the unit must be switched on to arm the timer. Each contact channel has a contact input for volt-free contacts and a VDC input for DC voltages.

  • Page 35: General Procedure For Timing Tests

    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 CU-Ps is used. 2.3.2.1 Connections Ensure that the unit is switched off and the test object is isolated and grounded before making any connections.

  • Page 36: Storage Of Results

    OFF position. Storage of results The CU-Ps can store all displayed values to a CSV spreadsheet file whenever the timer stops, or the output is switched off. This is useful for recording all results, plotting relay curves and plotting transformer magnetisation curves.

  • Page 37: Usb Key

    The same comment is tagged to each result until the comment is updated or the comment is erased. The comment is erased when the unit is switched off. Any English language USB keyboard can be used with the CU-Ps. The comment can be typed on the USB keyboard using the letters a-z, numbers 0-9 and punctuation marks.

  • Page 38: Auto-Store

    Results are not stored when the timer is set to OFF. This allows the output current to be set without storing any results to the output file. The example below shows data stored when testing a relay. "CU-Ps ","V0.12","C00","P1","A1" "Time","Date","Main A","Timer","Aux A","Aux V","Phase","Freq Hz","Aux Range","Comment"...

  • Page 39: File Formats

    The results file is in CSV (comma separated value) format. The first line of the file details unit type, software version and configuration information. The second line specifies column headings for the data, and the third line onwards is data. "CU-Ps ","V0.12","C00","P1","A1" "Time","Date","Main A","Timer","Aux A","Aux V","Phase","Freq Hz","Aux Range","Comment"...

  • Page 41: Application Notes - Testing Specific Devices

    Timer Mode Internal start 3.1.2 Connections Connect the relay current coil to the most appropriate output on the CU-Ps (5V 100A or 15V 33A). Connect the trip contacts on relay under test to contact set 1 on the CU-Ps. 3.1.3 Test Procedure Switch on the main supply switch.

  • Page 42: Primary Injection Of An Over-Current Relay

    Press the output OFF push-button. Select the internal start position on the timer mode switch. Figure 3.2 CU-Ps with over current device Press the output ON push-button. When the device under test trips the timer will stop, and the output will be...

  • Page 43: Using Pulse Mode To Set The Current

    Press the output ON push- button. Figure 3.3 CU-Ps with auto-reclose device When the device under test trips the timer will start, and the output will be switched off automatically. When the device auto-resets the timer will stop.

  • Page 44: Timing Devices With No Auxiliary Contacts

    Press the output ON push- button. When the device under test trips the timer will stop, and the output will be switched off automatically. Figure 3.4 CU-Ps injecting into device with no auxiliary contacts...

  • Page 45: Using The Control Unit As A Single Contact Timer

    Using the Control Unit as a Single Contact Timer 3.5.1 Timer Mode Single contact. 3.5.2 Connections Connect contact to be timed to contact set 1. 3.5.3 Test Procedure Switch on the main supply switch. Set timer mode switch to the single contact position. Ensure that the output control is in the zero position.

  • Page 46: Test Procedure

    (e.g. 500A on 100% range with PLU-6k). The CT secondary Figure 3.7 CU-Ps CT ratio/polarity current must not exceed 5A. Press the output ON push- button and increase the output current to the desired test current.

  • Page 47: Ct Ratio

    Read off the CT ratio from the display. Note: If the CT secondary is >5A a lower test current must be Figure 3.8 CU-Ps CT ratio/polarity used such that no more than 5A flows into the metering input. Press output OFF push-button.

  • Page 49: Maintenance

    Removal of the CU-Ps from Case To remove the instrument from its case, the following procedure should be used: a.

  • Page 51: Standard Accessories

    1 off 32mm T4A Standard Accessories Supplied Description Part Number 5 metre supply cable terminated at one end to suit the CU-Ps control unit A018-0001 mains input. 5 metre interconnecting lead terminated at both ends to supply power A240-0001 from the CU-Ps control unit to the PLU loading unit.

  • Page 53: Overall Performance Specification

    OVERALL PERFORMANCE SPECIFICATION Insulation Resistance at 1000V DC The insulation resistance will not be less than 10 megohms 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 isolated inputs/outputs 1.5kV RMS for 1 minute.

  • Page 54: Secondary Injection Current Output

    6.3.2 Secondary Injection Current Output Ammeter Unit Accuracy Trip current range 10.00A ±0.5%rdg±5d 10.5A CU-Ps 20.00A ±0.5%rdg±5d 100.0A ±0.5%rdg±5d 105A 6.3.3 Auxiliary Metering Input Auxiliary metering range Full scale Accuracy 300.0V RMS 300.0V ±0.7%rdg±5d 5.000A RMS 5.000A ±0.7%rdg±5d 6.3.4 Timing System...
  • Page 55 REVISION Product / Type: Primary Current Injection – CU-Ps & PLU Loading Units File: CU-Ps manual v1.doc Author: G Bond Date: 17.06.19 Issue / Date: 1 / 20.08.19 Modified By: M Clancy Checked By: N Eldridge Date: 28.10.19...
  • Page 56 Drawings Required A3/002121 latest issue (CU-Ps) A3/002135 latest issue (PLU-5k) A3/002127 latest issue (PLU-6k)

This manual is also suitable for:

Plu-5kPlu-6k228-1

Table of Contents