Settings For Operation - ABB Arc Guard System TVOC-2 Installation And Maintenance Manual

Draft, ne pas diffuser Tue Dec 18 2018 15:16:42 GMT+0100 (Romance Standard Time)
8
1.4 Connection of Optical Fibre Cables
and Detectors
General
Before the detectors can be connected to the component
the protective covers on the input terminals must be
removed. Please note that unused optical inputs must
have their protective plugs inserted, to avoid incorrect
tripping signals coming from them.
When connecting the detectors to the component the
end sleeve of the optical fibre is pressed to the bottom
of the connection terminal. Please check that it can not be
removed easily by gently pulling the optical fibre cable.
7. Connect the detectors to the Arc Monitor
1
Remove the protection plug.
detector cable to the detector inputs at the lower
right side of the Arc Monitor.
8. Connect the TVOC-2 to the CSU
1
Connect a optical fibre cable to 21 or 22 in
the Arc Monitor.
the fibre cable to 7 or 8 in the Current Sensing Unit.
Connect outsignal from the CSU
If more than one Current Sensing Unit is used, the
optical fibre cables are connected from output 7 or
8 to input 9 of the next Current Sensing Unit so that
the Current Sensing Units are connected in series.
1.5

Settings for Operation

9. Test or Operational position
The CSU can be switched to Test position or
Operational position by turning the S1 Switch.
Switch S1
Position 1: Test
Position 2: Operation
Switch input 9 on or off
Input 9 of the CSU can be switched to on or off
position by turning the S1 Switch.
Switch S2
Position 1: When input terminal 9 is not used.
Position 2: When input terminal 9 is used.
10. Set the nominal level with Potentiometer R21
The nominal overcurrent level is set with the
Potentiometer R21
The overcurrent level should be set as low as
possible. Adjustment must be done at max load
current. The potentiometer is turned clockwise until
both the yellow LED V27
2
are lit. It should then be turned back slightly until
the yellow LED is switched off. With this setting the
current sensing unit will indicate an overcurrent at
a level of approx. 140% of the max set current level.
ABB
CURRENT SENSING UNIT INSTALL ATION AND MAINTENANCE GUIDE
2
Connect the
2
Connector the other end of
1
in figure 9
2
in figure 9
1
and the green LED V29
7
1
8
2
9
10
2
2
1.4-7
1
1.4-8
S1
S2
1.5-9
1
2
1.5-10