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Product
Description
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.
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Feature |
PCU1-LT |
PCU1-SP |
PCU1-HP |
PCU2 |
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Primary Injection |
Yes |
Yes |
Yes |
Yes |
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Maximum Output Power |
11.5kVA |
11.5kVA |
16.6kVA |
20kVA |
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Secondary Injection |
No |
Yes |
No |
No |
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CT ratio/polarity test |
No |
Yes |
Yes |
No |
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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. Additional loading units are also available to order to meet
customers requirements for stability testing.
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.
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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. |
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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.
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