5 electrical installation, 1 important notes, 1 earth-leakage circuit breaker – Lenze 712 E.3B Benutzerhandbuch
Seite 51: 2 electrostatic hazard, Electrical installation, Important notes, Earth-leakage circuit breaker, Electrostatic hazard
Electrical installation
Important notes
Earth-leakage circuit breaker
5
51
EDB712 DE/EN 2.1
5
Electrical installation
5.1
Important notes
5.1.1
Earth-leakage circuit breaker
Danger!
Dangerous electrical voltage
Drive controllers in this series have an internal mains rectifier. For
this reason, after a short circuit to frame a DC leakage current can
block the leakage current tripping. To prevent this situation, take
the following measures:
ƒ
Connect the system to neutral or use an earth-leakage circuit breaker of
universal-current sensitivity.
Capacitive compensation currents occurring in the cable shield and interference
filter under normal operating conditions can cause the earth-leakage circuit
breaker to trigger incorrectly.
ƒ
Set the trigger current on the earth-leakage circuit breaker sufficiently
high that incorrect triggering is not possible.
Note!
Earth-leakage circuit breakers of universal-current sensitivity are
described in the standards
DIN EN 61800-5-1 and IEC 755.
5.1.2
Electrostatic hazard
Stop!
Electrostatic hazard
Drive controllers in this series contain electrostatic sensitive devices.
Prior to working on the drive controller, service personnel must
discharge themselves.
ƒ
Touch the PE fixing screw or any other earthed metal surface.