Mosa RENTAL GE 50 KR-5, Руководство по эксплуатации и обслуживанию

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4. Description
The differential relay has 2 tests, 1 of which is carried out automatically by the instrument:
• Manual test (test button).
• Automatic test of toroid-relay connection and release reel relay.
The differential relay can operate correctly even in the presence of harmonic distortion or with very disturbed
signals.
If the internal temperature exceeds the operating threshold, the Fault led (3) flashes.
The interruption of operation due to a failure of the torus (breakage of the connecting wire) or a fault of part
of the internal circuits, leads to the automatic intervention of the protection.
4.2.3
Residual current circuit breaker with overcurrent protection (RCBO)
The residual current circuit breaker with overcurrent protection (RCBO) performs both electrical protection
functions against short circuits and overcurrents and against indirect contacts due to ground fault currents.
In the electrical panel there are several residual current circuit breakers with overcurrent protection (RCBO),
one for each output socket, this allows to individually protect the equipment connected to the sockets.
The residual current circuit breakers with overcurrent protection (RCBO) differ according to their character
-
istics: tripping thermal current, magnetic tripping curve, breaking power, tripping differential current, type of
differential correction detected.
4.2.4
Residual current circuit breaker (present only for DGUV version)
The residual current circuit breaker guarantees protection against indirect contacts due to ground fault cur-
rents.
When the switch detects a fault current greater than the rated one, it opens interrupting the electric circuit
connected.
The residual current circuit breakers differ according to their characteristics:
tripping differential current, maximum rated current, type of differential correction detected.
4.2.5 Isolation monitor (model
Type B - version DGUV)
*
Important
•
Isolation monitor calibration changes must only be performed by qualified personnel. If necessary,
contact Technical Support.
The isolation monitor is a device that continuously controls
the ground insulation of the electrical circuit.
When the device detects a resistance value (isolation) lower
than the set value, it intervenes by signalling the fault and
opening the main machine switch.
1 - Alarm threshold adjustment
2 - Dip-switch
3 - Pre-alarm indication led
4 - Power supply presence indication led
5 - Alarm indication led
6 - Test button
7 - Reset button
8 - Pre-alarm threshold adjustment
8
1
5
6
7
2
3
4
D5260390