Bender RC48N-70-10 A, Operating Manual

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17 TGH1397en/11.2006
5. Operation and configuration
5.1 Operating elements RC48N-70-10A
1 Master switch S1: Monitoring ON/OFF
2 Press the TEST key to initiate the following sequence: A test residual current is simulated and
once the response time has elapsed, an alarm is recognised; which causes the alarm relay to
switch and the “ALARM Ground Fault” LED and alarm lamp H3 to light up. The alarm message is
stored.
3 Press the RESET key to delete alarm messages
4 ON LED (green) lights up to indicate that the RC48N is in operation.
5 The “ALARM Ground Fault” LED (red) lights up if the residual current response value and the
response time are exceeded.
6 The “ALARM Resistor Fault” LED (red) lights up if the voltage across the neutral earthing resistor
exceeds the response value or if the NER’s resistance exceeds 2 K
Ω
..
7 DIP switch “Filter OFF/ON”: Bandpass filter 50 ... 60 Hz.
When the bandpass filter is switched on, only the narrow-band 50 ... 60 Hz components of the
residual current are detected. This function can be used to prevent erroneous tripping as a
result of harmonics and transient components in the residual current.
8 DIP switch “I
Δ
n x 10 / x 1”: For configuring the setting range of the residual current response
value I
Δ
n/A
x 1: 0.1 A ... 1 A
x 10: 1 A ... 10 A
9 For setting the response delay t/s for the residual current measurement from 0.1 to 2 seconds.
10 For setting the residual current response value from 0.1 A to 1 A and 1 A to 10 A respectively.
11 For setting the response value for voltages across the neutral earthing resistor from
20 to 400 V.
12 In the event of an alarm, alarm lamp H3 will light up.
1 2 7 6 5 4 3 9 8
U
D
/ V
RC48N
A1 A1
•
A2 11 12 14 21 22 24
T R NRA C2 U+ G1 G k l NC NC GFA C1 U- • •
•
•
•
•
• A2
t / s I
D
n
/A
20
200
400
ALARM
Ground
Fault
ALARM
Resistor
Fault
TEST RESET ON
Filt
er off / on
I
D
n x 10 / x 1
V D
MONITOR
I
D
n
W
0,1
0,5
1 0,1
1
2
ON
OFF
ALARM
10 11 12
S1 H3 U1