ABB Arc Guard System TVOC-2 Installation And Maintenance Manual page 9

Draft, ne pas diffuser Tue Dec 18 2018 15:16:42 GMT+0100 (Romance Standard Time)
1.6 Control
Preform this test after installation, before using the unit.
Switch on the supply voltage.
Switch S1 to position 1, (the test position).
A red lit LED, V22, indicates that S1 is in test position.
11. Control the Overcurrent
An overcurrent is simulated by turning the
potentiometer R29 clockwise until both the yellow,
V27, and the green, V29, LEDs are switched off.
A fault is simulated, and it should be checked that
the circuit breaker trips.
12. Control the Normal current
A normal current is simulated by turning the
potentiometer R29 counter clockwise so that both
the yellow LED and the green LED are lit.
A fault is simulated again, in the same way as
above, and it should be checked that the circuit-
breaker does NOT trip.
Resetting to NORMAL RUN condition is done by setting
switch S1 in the Current Sensing Unit to position 2.
(The red LED V22 is switched off.)
1.6.1 Test when in use
WARNING
Since the breaking capacity of the
disconnectable terminal blocks are very low,
they must not be opened when there is current
flowing in the circuit.
To enable a test to be done when the Arc Monitor is in use,
the trip circuit can be disconnected by opening the inputs
1 2
21 and 22 .
DO NOT FORGET TO RECONNECT THE TERMINALS 21
3
AND 23 AFTER THE TEST.
A control of the function is recommended after every arc
fault and should also be carried out regularly, e.g. once
a year. This applies to all units.
INFORMATION
If the dip switches on the TVOC-2 are configured
to have a CSU installed and the CSU cable is
disconnected, a fault indication will appear.
Fault indication will disappear when
reconnecting the CSU cable to the TVOC-2.
ABB
CURRENT SENSING UNIT INSTALL ATION AND MAINTENANCE GUIDE
11
12
13
2
1.6-11
1.6-12
1
2
3
1.6.1-13
9