ABB Arc Guard System TVOC-2 Installation And Maintenance Manual page 23

ABB ARC GUARD SYSTEM™ – T VOC-2 INSTALL ATION AND MAINTENANCE GUIDE
Example 3, Mounting in a circuit breaker cubicle
In a circuit-breaker cubicle there is a risk of detecting
breaking arcs unintentionally, if the detector is placed
above the busbars. In such a cubicle it is better to place
the detector at the bottom. See Figure 9.
• Use the same mounting bracket as for top mounting
but the bend is turned upwards and the detector
placed on the upper side.
• Drill a hole 20 mm (0.79 inches) in front of the busbars,
where the detector can be located.
If many cables are connected to the terminals on the lower
side of the circuitbreaker, the arc monitoring should have
with an additional detector located just behind the front
protective sheet. See Figure 10.
Attach the detector directly to the bottom side of the
bracket of the protective cover with a cable strap.
Connecting optical detectors
WARNING
Make sure that supply voltage is switched off!
Follow this steps below to connect the optical detectors
to the Arc Monitor.
1. 1 Remove the protection plug.
WARNING
Only remove protection plug from connection
to use. Protection plugs are needed to protect
the detector inputs from dust and light.
2 Connect optical detectors to lower side of arc monitor.
Detector inputs are X1:1-10 (for Extension 1, X2:1-10 and
Extension 2, X3:1-10)
Figure 9
Place the detector at the bottom
Figure 10
Additional detector located just behind the protective sheet
1
Figure 11
Connect the CSU cable
23
1SFC170011M0201
1SFC170011M0201
2
1SFC170011M0201