Máy tạo dòng điện PCU1-SP  PCU1-LT

Features (PCU1-LT and PCU1-SP)

· 5kA maximum output current

(higher overload currents for 2s) 

· Multi-function digital timing system

· Digital true RMS memory ammeter

· Solid state switching

· 2000A and 5000A loading units

· Three range outputs on loading units

· Rugged, compact design

· Optional trolley mounting of system

PCU1-SP Additional Features

· Secondary injection up to 100A 

· Direct reading CT ratio and polarity

The  control  units  are  rated  at  11.5kVA  with  a  2  second

overload capability of 23kVA using pulse mode.  All metering

is digital and a memory facility is provided to hold the current

reading when the output trips or is switched off.  The current

is  thyristor controlled and  is automatically switched off when

the device under test trips.

The  PCU1  systems  have  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.

The  PCU1  series  are

medium  powered  primary  current

injection systems offering output currents up to 5000A.  The

system  consists  of  a  separate  control  unit  containing  all

metering  and  control  functions  and  a  loading  unit  that

provides the high current output.  The PCU1-LT and PCU1-

SP  are  ideally  suited  to  primary  current  injection,  stability

testing  and  circuit  breaker  testing.    In  addition,  the  SP

version offers direct-reading CT ratio and polarity tests and

a  100A  secondary  injection  output.   T&R  also  offer  the

higher-powered PCU1-HP and PCU2.

  Timing modes are available  to  test under and over  current

devices,  re-closers, under and over  voltage devices,  current

trips and circuit breakers.  A  full range of high current output

leads are available  to complement  the system  in a  range of

lengths.

Two loading units are available, delivering a maximum output

current  of  2000A  or  5000A.   Each  loading  unit  has  three

output  taps  to  allow  for  a  wide  range  of  load  impedances. 

For example,  the NLU5000 may be configured  to either give

a maximum  current  of 5000A  on  the  2.3V  range,  2500A  on

the 4.6V range or 1250A on the 9.2V range.   

PCU1-SP

PCU1-LT

Primary Current

Injection Systems

PCU1-SP & NLU5000 with

optional trolley

Feature  PCU1-LT  PCU1-SP  PCU2

Primary injection  ¸  ¸  ¸

Max output power

11.5kVA

40s

11.5kVA

40s

20kVA

5 min

Secondary injection  ˚  ¸  ˚

CT ratio/polarity test  ˚  ¸  ˚

                       Output current                      Range               Output state

1.000kA   5kA     On

000.000s  5000.:5ACT  

                       Timer                                     Auxiliary metering

23 Note: Due to the company’s continuous research programme, the information above may change at any time without prior notificatio n.  Please check that you have the most recent data on the product.

T&R Test Equipment Ltd, 15-16 Woodbridge Meadows, Guildford, Surrey, GU1 1BJ, UK

PCU-LT/PCU1-SP Control Unit Specification

Loading Unit Current Metering

The  AC  output  current  is  metered  by  a  true  RMS  memory

ammeter  (acquisition  time 200ms)   with a  liquid crystal display. 

The current metering has 3  ranges corresponding  to 10%, 50%

and 100% of the maximum rating of the loading unit.  In addition,

a 200% metering range is enabled in pulse mode.

NLU2000

Range               Full scale         Resolution        Accuracy

10%                   200.0A             0.1A                   ±0.5%rdg+5d*

50%                   1000A              1A                      ±0.5%rdg+5d*

100%                 2000A              1A                      ±0.5%rdg+5d*

200%                 4000A              1A                      ±1%rdg+5d**

NLU5000

Range               Full scale         Resolution        Accuracy

10%                   500.0A             0.1A                   ±0.5%rdg+5d*1

50%                   2500A              1A                      ±0.5%rdg+5d*1

100%                 5000A              1A                      ±0.5%rdg+5d*1

200%                 10kA                  10A                    ±1.5%rdg+5d*2

*1

1.5% rdg+5d in pulse mode          

*2

selected in pulse mode

Timing System

The  PCU1  systems  have  a  flexible  timing  system  with  two

contact  inputs  and  5  operating  modes.   Each  contact  circuit

automatically selects  for N/O or N/C contacts, and  the status of

each  contact  input  is  shown  by  an  LED.   The  timing  channels

may also be triggered by a dc voltage between 24 and 240V.  

Timer resolution                       1ms

Timer full scale                       999.999s

Timer accuracy                        ±0.01%rdg+2d (4d current mode)

Contact O/C voltage               24V

Contact S/C current                 20mA

Vdc input range                      24-240Vdc

Timer mode                              Timer start                   Timer stop

Internal Start                              ‘On’ button                    Contact

Single contact                            Contact 1                      Contact 1

Dual contact                             Contact 1                      Contact 2

Current operated

*3

                  Current >20% rng               Current <20% rng

Pulse mode 0.2s

*4

                   ‘On button’                    0.2s

Pulse mode 0.5s

*4

                   ‘On button’                    0.5s

Pulse mode 1s

*4

                      ‘On button’                    1s

Pulse mode 2s

*4

                      ‘On button’                    2s

Off                                                Setting position

*3

Current operated mode  is used to time circuit breakers with no

auxiliary contacts.  The timer is started when the current exceeds

20% of the selected metering range (e.g. 100A on the NLU5000

500A range).  The timer stops when the current falls.

*4

Pulse mode  applies current  to  the  load  for a maximum of  the

specified  time.   If  contact  set  1  changes  state  or  the  current

drops  below  20%  of  the metering  range  during  the  pulse  time,

the  timer  is stopped.  The maximum output current  is  increased

in pulse mode.  The maximum obtainable  current  is  set by  the

impedance of the test object and output leads.

Secondary Injection Output (PCU1-SP only)

The secondary current injection output on the unit has two taps,

allowing the injection of currents up to 100A.

Output Range               Continuous      Intermittent current

                                      current               5min on*5

        1 min on*5

0-5V                                33A                  67A                    100A

0-16V                              10A                  20A                    30A

*5

All on times must be followed by an off time of 15 minutes 

Metering Range          Resolution       Accuracy          Current trip

10.00A                          0.01A               ±0.5%rdg+5d    10.5A

20.00A                          0.01A               ±0.5%rdg+5d    21A

100.0A                          0.1A                 ±0.5%rdg+5d    100A

The output is protected by electronic trips and a circuit breaker.

Supply Requirements

230V±10%, 45-65Hz 1ph 11.5kVA max (23kVA overload for 2s)

Control Unit Standard Accessories

Mains  lead  (5m), loading  unit  power  and metering  leads  (5m),

operating manual and spare fuses.

Dimensions

PCU1-SP/PCU1-LT    450(w) x 275(h) x 305mm(d)

NLU2000/NLU5000   450(w) x 275(h) x 370mm(d) incl. terminals

Weight

PCU1-LT 23kg            PCU1-SP 26kg            

NLU5000 55kg            NLU2000 50kg

Temperature Range

Storage -20°C to 60°C, Operating 0°C to 45°C

Protection and Safety

The  PCU1  series  and  loading  units  are  CE  marked  and  are

designed to meet the requirements of BS EN61010.  The system

is protected by electronic trips on the outputs, circuit breakers on

the  mains  input,  control  unit  output  and  secondary  injection

output  (PCU1-SP only).  The unit also has a duty  cycle  trip on

the  loading unit output and  the  loading unit has comprehensive

thermal protection.

Optional Loading Unit Specifications

Two  loading  units  are  available  to  provide  a  range  of  output

currents  suitable  for  different  primary  injection  tasks.   Each

loading unit has three output taps allowing current injection into a

wide  range  of  loads  of  differing  impedances.   Optional  output

lead sets are also available (see www.trtest.com for details). 

NLU5000 Loading Unit Intermittent Ratings

Output                           Maximum current

Voltage*     Cont.          5 min          1 min          40s             

2.3V           1500A       3000A         4500A         5000A

4.6V           750A         1500A         2250A         2500A

9.2V           375A         750A           1125A         1250A

NLU2000 Loading Unit Intermittent Ratings

Output                           Maximum current

Voltage*     Cont.          5 min          1 min          40s

3.5V           600A         1200A         1800A         2000A

6.9V           300A         600A           900A           1200A

13.8V         150A         300A           450A           500A