Atec T-R-PCU1 - Manual

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.
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
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 ь ь ь
Max output power
11.5kVA
40s
11.5kVA
40s
20kVA
5 min
Secondary injection ы ь ы
CT ratio/polarity test ы ь ы
Output current Range Output state
1.000kA 5kA On
000.000s 5000.:5ACT
Timer Auxiliary metering
23