ABB REA 105 Operator's Manual page 11

1MRS 751005-MUM
Arc Protection Module
Operator's Manual
Switchgroup SG1:
1. Switch 1 (Terminator IN1 ON/OFF)
Switch in ON position: Terminator IN1 connected
2. Switch 2 (Terminator IN2 ON/OFF)
Switch in ON position: Terminator IN2 connected
3. Switch 3 (Automatic light ref. level ON/OFF)
Switch in ON position: Automatic backlight compensation selected
(Potentiometer Light Ref. Level Adj. not in use)
Switch in OFF position: Manual backlight compensation selected
(Potentiometer Light Ref. Level Adj. in use)
4. Switch 4 (Sensor ON/OFF)
Switch in ON position: The sensor fibre is used for arc detection
5. Switch 5 (Light to port IN1 ON/OFF)
Switch in ON position: A light signal detected by the REA 105 is transmitted
to the REA 101 unit linked to the port IN1. (When the REA 101 unit trips,
the REA 105 extension units connected to it trip as well.)
Switch in OFF position: No light signal is transmitted to the port IN1.
6. Switch 6 (Delayed light to port IN1 ON/OFF)
Switch in ON position: Circuit-breaker failure protection in use.
The selected time delay (SG1/7) is started by the tripping of the REA 105
unit. If the overcurrent signal is still active when the time delay elapses, the
REA 105 unit transmits a light signal to the higher-level REA 101 unit linked
to the port IN1.
Switch in OFF position: N o delayed light signal is transmitted to the port
IN1.
7. Switch 7 (Delay ON = 150 ms, OFF = 100 ms)
This switch is only used together with the circuit-breaker failure protection
(SG1/6 in ON position)
Switch in ON position: Delay = 150 ms
Switch in OFF position: Delay = 100 ms
8. Switch 8 (Sensor supervision deactivation ON/OFF)
Switch in ON position: Sensor fibre loop condition monitoring not in use, i.e.
a radial fibre may be used
Switch in OFF position: Sensor fibre loop condition monitoring in use.
REA 105
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