Operation Manual

BENNING IT 130 short instructions
- 17 -
2.5 Residual current operated device (RCD)
1. Set function
2. Set sub-function, parameters and limits.
RCD
RCD I Tripping current
RCD t Tripping time
Uc Contact voltage
AUTO automatic test
Nominal tripping differential current I
N
[10/30/100/300/500/1000 mA].
RCD type [AC, A, F, B, B+]
Starting polarity [ , , , ,
,
]
Characteristic [selective , general non-
delayed , PRCD, PRCD-S, PRCD-K]
Multiplication factor for test current
[½ x I
N
, 1/2/5 x I
N
].
Limiting value for contact voltage
[25 V, 50 V].
3. Connection diagrams
Connecting the plug "Commander" (optional, TN 044149) and the 3-wire test lead
4. Press the key .
5. The measuring result can be stored by means of the "MEM" key.
Uc .... Contact voltage
RL .... Fault loop
resistance
t ........ Tripping time
Uc .... contact voltage
for nominal value I
N
I ......... Tripping
current
Uci ..... Contact
voltage at trip-out
current I or end value
in case the RCD
didn’t trip
t ......... Tripping time
Measuring values for
0°/180°:
x1 ... Tripping time I
N
x5 ... Tripping time 5xI
N
x½ .. Tripping time ½I
N
I .... Tripping current
Uc…Contact voltage for
I
N