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Protection and safety
ISL industrial insulation monitoring devices

Technical features ISL-A
ISL-A
A 24-48 A 115 and A 230 A 600 5
Power consumption [VA] 3 4 6
ALARM threshold [kW] 30 - 300 (5 levels, selectable)
TRIP threshold [kW] 10 - 60 10 - 100 30 - 300 (adjustable by
(5 levels by switches) (5 levels selectable) potentiometer)
ISL LED ON ■ ■ ■
indications
TRIP ■ ■ ■
ALARM ■
+/- ■ ■ ■
Max trip delay [s] 0.2 2 2.5
Max measuring current [mA] 0.5 1.8 1.5
Internal impedance [kW] 50 ISL-A 115: 200 kΩ 880 kW L+/L - 450 kW
L+/L- 100 kΩ L/PE L/PE
ISL-A 230: 400 kΩ
L+/L- 200 kΩ L/PE
TRIP relay output 1 NO-C-NC 2 NO-C-NC 1 NO-C-NC
ALARM relay output 2 NO-C-NC
Relay contact capacity max 250 V, 5 A
Programmed Alarm ■
functions output
Fail safe ■
Reset ■
Insulation 2.5 kV60 sec./ 2.5 kV 60 sec./ 2.5 kV 60 sec./
6 kV imp 1.2/50 μs 4 kV imp 1.2/50 μs 6 kV imp 1.2/50 μs
Operating temperature [°C] -10 ÷ 60
Storage temperature [°C] -20 ÷ 70
Relative humidity ≤ 90%
Max terminal [mm ] 4 2.5 2.5
2
cross-section
Protection degree IP40 front, IP20 enclosure
Modules [n°] 3 6 6
Weight [g] 200 400 400
Reference standards EN 61010-1, EN 61557-8, EN 61326-1