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Protection and safety
ISL industrial insulation monitoring devices

Insulation monitoring devices
In IT electrical distribution networks with isolated neutral, the high insulation impedance
prevents earth faults from generating currents that would dangerously elevate the potential 5
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 essential to continually monitor the insulation
level in order to detect faults and restore optimal functioning of the system.
In industrial installations, IT networks are used when operational continuity is an intrinsic re-
ISL-A quirement of the production process, due to both technical and economic considerations.
Such applications include: metalworking and chemical industries, explosion risk locations,
railway lines and vehicles, uninterruptible power supplies, cinema sets, emergency lines, fire
water pumps and emergency lighting.
Insulation monitoring devices for AC networks

Max. monitored Bbn Order details Price Weight Pack
line voltage 8012542 1 1 piece unit
piece
EAN Type code Order code kg pc.
220-240 V AC 942801 ISL-C 230 2CSM444000R1500 0.300 1
380-415 V AC 942900 ISL-C 440 2CSM545000R1500 0.300 1
60-760 V AC 943006 ISL-C 600 2CSM656000R1500 0.500 1
ISL-C
Insulation monitoring devices for DC networks
Max. monitored Bbn Order details Price Weight Pack
line voltage 8012542 1 1 piece unit
piece
EAN Type code Order code kg pc.
100-144 V DC 942603 ISL-A 115 2CSM222000R1500 0.500 1
220 V DC 942702 ISL-A 230 2CSM333000R1500 0.500 1
400-600 V DC 498537 ISL-A 600 2CSM249853R1500 0.500 1

Insulation monitoring devices for AC/DC networks

Monitored Bbn Order details Price Weight Pack
line voltage 8012542 1 1 piece unit
piece
EAN Type code Order code kg pc.
24-28 V AC/DC 942504 ISL-A 24-48 2CSM111000R1500 0.300 1