Vertiv 581126000, User Manual

Page: 203 / 208

Vertiv
| +24 VDC Power System User Manual (Section 6013) | Rev. G
203
Replacing a List RC, RD, RE Battery Disconnect Contactor
Refer to SAG581126000 for contactor part numbers.
When performing the following procedure, refer to Figure 28 .
Removing the Contactor
DANGER! All sources of AC and DC power must be completely disconnected from this power system
before performing this procedure. Use a voltmeter to verify no DC voltage is present on the system
busbars before proceeding.
1. Remove the contactor rear access cover. To do so, loosen but do not remove the four screws that
secure the cover. Slide the cover up and remove. Refer to
Figure 28 for screw location.
2. Remove the four (4) 3/8-16 x 1-1/4” bolts and associated washers from the contactor. Slide contactor
back until wiring on contactor is accessible. Refer to
Figure 28 .
3. Disconnect the four (4) wires on the auxiliary switch, and the two (2) wires on the coil body. Refer to
Figure 29 . Remove the contactor.
Installing the New Contactor
NOTE!
In the following procedure, before making busbar-to-busbar connections, apply a thin coating of
electrical anti-oxidizing compound to the mating surfaces of the busbars.
1. Connect the six (6) wires to the replacement contactor as shown in Figure 29 .
2. Place the contactor in position, and secure by installing the 3/8” hardware as shown in Figure 28 .
Torque as shown in the figure.
3. Reinstall the contactor rear access cover. Tighten the four screws.
Restarting the Power System
1. Reconnect DC and AC power to Power System.
2. Start the Power System. Refer to "Installing Rectifier Modules and Initially Starting the System" in the
separate INSTALLATION INSTRUCTIONS (SECTION 6012) for a startup procedure.
3. Verify no alarms are active.
4. Close the Distribution Cabinet's front door. The door can be shut without turning the captive fasteners.