100ADM-F 100ADM-F

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100ADM-F/100ADM-F/

Features
 Forces test current to a sinusoid
 Improves timing accuracy when testing
electromechanical relays
 0.2-100A ranges
 High overload capability
 50/60Hz operating frequency
 High efficiency
The filter unit reduces the level of current
harmonics when testing electro-mechanical protection relays.
It is designed for use with our range of secondary injection
test sets.
All electromechanical protection relays have iron cores that
saturate and distort the test current under high overload test
conditions. This distortion causes significant errors in the
measured trip time of these relays during testing. Distortion
of the waveform can be a particular problem with disc
induction type over-current and sensitive earth fault relays.
For example, testing a CDG11 disc induction over-current
relay without a filter causes significant timing errors. The
results below show the errors for a 1.3s 1A CDG11 overcurrent
relay on its 0. plug setting, tested at .
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