ABB ISL-C 600 Instruction Manual

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IN STR UC T I O N M AN UA L
ISL-C 600
INSULATION MONITORING DEVICE FOR ISOLTAED IT (AC) NETWORKS
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GENERAL
In IT electrical distribution networks with isolated neutral, the high insulation impedance prevents earth faults
from generating currents that would dangerously elevate the potential of exposed conductive parts.
Therefore, in case of earth leakage in an IT network it is not necessary to interrupt the supply, but it is still es-
sential to continually monitor the insulation level in order to detect faults and restore optimal functioning of
the system.
The ISL-C 600 is an Insulation Monitoring Device for IT networks with voltages up to 760 Vac.
By putting a continuous component measure signal between the insulated line and earth, it's possible to con-
trol the insulation resistance by reading the dispersion current generated to earth.
These devices have two trip thresholds (ALARM and TRIP) adjustable using the front micro-switches to signal
when the insulation falls below the threshold level.
The front LED signals the trip.
Two free voltage changeover contact relays allow the remote trip signalling. The relays can be programmed
with the fail-safe (normally excited). The device is equipped on the front panel with a TEST and a RESET push-
button.
The test can be activated either by the push-button on the device or an external push-button, while the reset,
that can be set to manual or automatic, is activated, as is the test, with the local or remote push-button.
The level of the insulation resistance is displayed on the bar LED on the front panel with a scale of 5-500 kΩ at
8 points.
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MODEL
ISL-C600 network voltage and auxiliary supply 110-230V 50-60 Hz (100÷130 / 220÷240V ± 10%)
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