T&R Test Equipment Model PCU1 Primary Current Injection System Specifications

	High Current Test System
PCU1 Primary Current Injection System

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Product Specifications

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% of reading +5 digits
50%	1000A	1A	±0.5% of reading +5 digits
100%	2000A	1A	±0.5% of reading +5 digits
200%	4000A	1A	±1% of reading +5 digits

NLU5000
Range	Full Scale	Resolution	Accuracy
10%	500.0A	0.1A	±0.5% of reading +5 digits
50%	2500A	1A	±0.5% of reading +5 digits
100%	5000A	1A	±0.5% of reading +5 digits
200%	10kA	10A	±1% of reading +5 digits

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.

Timing System
Timer resolution	1ms
Timer full scale	999.999s
Timer accuracy	±0.01%rdg+2 digits (4 digit 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 ^{Note 1}	Current >20% of range	Current <20% of range ^Note3	^Note3:(<20% of range contact 1)
Pulse Mode 0.2s ^{Note 2}	'ON button'	0.2s
Pulse Mode 0.05s ^{Note 2}	'ON button'	0.5s
Pulse Mode 1s ^{Note 2}	'ON button'	1s
Pulse Mode 2s ^{Note 2}	'ON button'	2s
OFF	Setting position

Pulse mode (note: ²)
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 (limited only by circuit impedances). The maximum obtainable current is set by the impedance of the test object and output leads.

Current operated mode (note:¹)
Current operated mode is used to time devices with no auxiliary contacts (many types of circuit breakers). 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 (i.e. the breaker opens).

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	5 minutes 'ON' (note)	1 minute 'ON' (note)
0 to 5V	33A	67 A	100A
0 to 16V	10A	20A	30A
Note: All 'ON' times must be followed by an 'OFF' time of 15 minutes

Metering Range	Resolution	Accuracy	Current Trip
10.00A	0.01A	±0.05% of rdg+2 digits	10.5A
20.00A	0.01A	±0.05% of rdg+2 digits	21A
100.0A	0.1A	±0.05% of rdg+2 digits	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 Supplied
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 29kg, PCU1-SP 35kg.

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.

NLU5000 Loading Unit Intermittent Ratings

Output		Maximum Current
Voltage*	Continuous	5 minutes	1 minute	40 seconds
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*	Continuous	5 minutes	1 minute	40 seconds
4V	600A	1200A	1800A	2000A
8V	300A	600A	900A	1200A
16V	150A	300A	450A	500A

Note* open circuit voltage at 230V mains

PUC1 Features