Hotline: +49 5251 688865-99
. User's Manual
Network D
immer Processor
53
dim
Dimmertest (in accordance with VDE Standard) :
Generally the safety test on a dimmer is done in the same way as with any other electrical control gear. There are
only a few things that have to be taken care of doing safety tests in dimmer installations:
1. The Insulation Resistance is measured with the dimmer rack switched off, all modules removed, no load
connected. Use the test dimmer for easier access to the connectors.
2. Make sure to disconnected the phase control lamps on top of the swivel frame before doing the insulation test
of the mains input. Otherwise you measure the resistance of the bulbs.
Disconnect the dimmer processors as well.
3. The RCDs are tested with the dimmer rack turned on, all modules populated. Make sure to have a load (approx.
300 W) connected parallel to the circuit you are testing and the circuit is controlled @ full. (The RCD is working
safe; independent from the control level, but your test instrument might not accept a measurement below a
certain voltage). From a practical point of view the easiest way is to do the tripping test once and then prove that
the contact voltage at nominal residual current does not exceed the maximum allowable value for each channel
output. There are test instruments that are capable of doing this measurement without tripping the RCD.
4. The Measurement of the loop impedance and determination of short circuit current is also done with the
dimmer rack turned on and a parallel load at full level. If your test instrument is not able to measure the loop
impedance without tripping the RCD you can measure the supply impedance instead.
