ABB PrimeGear ZX0 Product Manual page 45

I N S T A L L A T I O N O F T H E S W I T C H G E A R A T S I T E
2.3.6 Installation of damping resistors
Damping resistors, if required, are usually installed
on site above the low-voltage cabinet (fig. 2.3.6.1).
Wiring of the damping resistors
The damping resistors have several taps. The
clamps of the taps are marked with resistance
values in ohms (Fig. 2.3.6.2). Take the required
resistance from the circuit diagram and connect
the damping resistor according to the wiring
diagram.
Attach the damping resistor according to the
supplied assembly drawings.
—
Fig. 2.3.6.1 Position of
damping resistors
above the low voltage
compartment
—
Fig. 2.3.6.2 Example of
a damping resistor -
Marking of the taps
—
Fig. 2.3.6.1
—
Fig. 2.3.6.2
Resistor
Tube type resistor
2.3.7 Fitting the cover plates
Fit the rear cover plate (for free-standing
installation), the busbar cover and the end covers
as shown in the installation drawings supplied with
the switchgear.
2.4 Connecting the main earthing bar
• Connect the main earthing bar to the station
earth.

Details of the cross section and the
number of connections can be found in
the earthing diagram (not included in
ABB's scope of supply).
45
Rod type resistor