ABB CM Series Operating And Installation Instructions page 11

VI Function diagrams
a) Insulation resistance monitoring w/o fault storage e, auto reset, 1 x 2 c/o
A1-A2
S1-S3
S2-S3
Measured value
Hysteresis
Threshold value
Open-circuit principle
U: green LED
F: red LED
R: yellow LED
Closed-circuit principle
U: green LED
F: red LED
R: yellow LED
b) Insulation resistance monitoring with fault storage f, manual reset, 1 x 2 c/o
Measured value
Hysteresis
Threshold value
Open-circuit principle
U: green LED
F: red LED
R: yellow LED
Closed-circuit principle
U: green LED
F: red LED
R: yellow LED
t
h
s
11-14
11-12
21-24
21-22
g
11-14
11-12
21-24
21-24
t = Start-up time, fixed, min. 15 s
s
A1-A2
S1-S3
S2-S3
t
h
s
11-14
11-12
21-24
21-22
g
11-14
11-12
21-24
21-24
t = Start-up time, fixed, min. 15 s
s
j
j
t
s
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