Benning IT 120 B Kurzanleitung Seite 26

Measurements
3.9 RCD
 Set function
b Set sub-function
- C ontact voltage measurement (UC)
(test without measurement)
- T ripping time measurement (RCDt)
- Tripping current measurement
(RCD )
- R CD autotest (AUTO)
d Connection diagram
e Press the
f View results and press the MEM key to save them
Displayed results:
U : Contact voltage
C
R : Fault loop resi-
L
stance
c
- L imit contact voltage [25 V, 50 V]
- Nominal differential RCD tripping
current
[10 mA ÷ 1000 mA]
- Multiplier of nominal differential
RCD tripping [x½, x1, x2, x5]
- Test current starting polarity and
RCD type [
Note:
Type AC
G general, non-delayed,
S selective, time-delayed,
key
Displayed results:
t: Trip-out time
U : Contact voltage
C
Set parameters and limits
G, G,
S, G, G, S,
G, G, S, S]
, type A
positive start polarity,
negative start polarity
Displayed results:
I : Trip-out current
∆
U : Contact voltage
CI
tI: Trip-out time
26
S,
S,
, type B ,
Displayed results:
U : Contact voltage
C
t1-t6: Trip-out times
RCD
