
Vertiv
|
+24 VDC Power System User Manual (Section 6013)
|
Rev. G
125
Installing LVD Contactor Bypass Kits P/NS 514910 and 514912
These kits are designed for field installation in a bullet nose type distribution bus assembly equipped with LVD
where the LVD function is no longer required. Part No. 514910 bypasses the contactor without removing it.
This kit can be installed with power applied to the system. Part No. 514912 replaces the contactor with a
busbar. All power sources must be removed from the system prior to installing this kit.
Installing Kit Part No. 514910
This kit consists of the following:
Qty. Part No.
Description
1
514909
Busbar
4
227640600 Bolt, 1/4-20 x 1”
Perform the following procedure to install the LVD bypass busbar. Refer to
performed.
Procedure
DANGER!
Observe the admonishments located at the beginning of this section.
1.
Open the Distribution Cabinet's front door by turning and holding the captive fastener in the
counterclockwise position.
2.
Remove the four bolts and washers indicated in
. Retain the washers for reuse. The bolts may
be discarded.
DANGER!
Perform the next step to avoid arcing when the busbar is installed.
3.
Verify that the LVD contactor is energized (contacts are closed); otherwise arcing may occur when the
bypass busbar is installed. As an alternative, remove all loads from the contactor by turning off all circuit
breakers or removing all fuses in the distribution row.
NOTE!
In the next step, apply electrical anti-oxidizing compound to busbar mating surfaces.
4.
Place the kit-furnished busbar as shown in
. Secure by installing four kit-furnished bolts (1/4-20
x 1”) and the washers that were removed in a previous step. Recommended torque is 84 inch pounds for
the standard (split) lock washers, and 60 inch pounds for the Belleville washers.
5.
Ensure all circuit breakers are turned on or fuses installed in the distribution row.
6.
Close the Distribution Cabinet's front door. The door can be shut without turning the captive fastener.