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The
CIT primary current injection
systemis ideally suited to
commissioning and maintenance
testing where high currents up
to 3000A are required. The
system consists of separate
control and loading units for
maximum flexibility. The control
unit contains all control and
metering circuitry, and is
linked to the loading unit by
control and metering cables. The
unitis capable of injection of
currents up to 3000A with an
LU3000LP loading unit.
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The
combination of theCIT and a
suitable loading unit is ideal
for many low power primary
current injection tasks up to
3000A, andis one of a pairof
productswith differing
facilities.
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| Feature |
CIT |
PCU1/E |
| Primary
injection |
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| Timer |
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| Secondary
injection |
x |
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Where
higher power is required, the
PCU2/E and associated loading
units can inject currents up to
6000A at 20kVA.
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Four
loading units are available,
delivering output currents
between 250A and 3000A. The
LU3000LP 3000A loading unit is
illustrated. Each loading unit
has two outputs which may be
connected in series or parallel
for maximum flexibility. For
example, the LU3000LP may be
configured to either give a
maximum current of 1500A at 4V
or 3000A at 2V.
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A
full range of output leads are
available to complement theCIT
and loading units.
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The
control units are rated at
6.9kVA, and have digital current
metering. A memory facility is
provided on the metering to hold
the current reading when the
output trips or is switched off.
The current is automatically
switched off when the device
under test trips.
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The
CIT has a flexible 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. Timing modes are
available to test under and over
current devices, re-closers,
under and over voltage devices,
and many current trips and
circuit breakers.
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LU3000LP,
LU500 and PCU1/E:
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