
T r o u b l e s h o o t i n g
Power Module DN
Version 09.2019
Page 33/43
9.6 False triggering of the RCCB, ELCB
If a RCCB or ELCB is used it needs to be a Type B, suitable for protecting frequency
inferters.
Due to the built in frequency inverter, higher than normal leakage currents can occur at ~450
Hz. These can falsely trigger the RCCB. A leakage compensation
2
can compensate leakage
currents at frequencies typical for frequency inverters und thus prevent false triggering.
9.7 Insufficient demagnetization
Demagnetization process
•
Check demagnetization process according to chapter demagnetization in coil module
manual
•
Is object in coil during the entire pulse duration?
Have objects to be demagnetized changed?
•
Material, treatment, magnetization, supplier (Material changes within supplier
tolerances are not communicated but can affect demagnetization)
•
Has the amount of objects changed?
•
Has the container changed? Ferromagnetic containers have a shielding effect.
Machine inspection:
Attention: maximum coil current and maximum field strength flow only during
~0.1…0.7s.
•
Inspection of contact pins
Coil module connector
(HAN)
•
Measurement of (reference measurements according to enclosed inspection protocol):
•
Electric resistance coil module
•
Inductivity coil module
•
Maximal coil current: with suitable current clamp
3
on
Coil module connector
•
Maximal field strength: Mean value of corner and centre measurement
•
Demagnetization pulse check with oscilloscope see below
2
Suitable type: LEAKCOMP HP, EPA GmbH
3
Suitable current clamps: Fluke 80i-110s AC/DC Current Clamp, Fluke i1000s AC Current Probe