HOSE AS 3874610 - Caterpillar

Personal injury or death can result from high voltage.When power generation equipment must be in operation to make tests and/or adjustments, high voltage and current are present.Improper test equipment can fail and present a high voltage shock hazard to its user.Use electrical safety gloves when you are working in the cabinets.Make sure the testing equipment is designed for and correctly operated for high voltage and current tests being made.
Whenever the following boards are replaced, the DC bus voltage must be recalibrated.
High voltage interface (HVI) BoardThe DC bus voltage is recalibrated by a software that is used to monitor the UPS, such as UPS View, and a PC that is connected to the UPS.Note: The following instructions are specific to UPS View.
Connect a PC to the UPS. Refer to Systems Operation, Test and Adjust, REHS7654, "Personal Computer to UPS Connection" .
Place the UPS in Bypass mode. Refer to Systems Operation, Test and Adjust, REHS7654, "Transfer to Bypass Mode".
Open the doors for the Inverter cabinet.
Illustration 1 g01298244
Illustration 2 g01298247
(1) Positive DC Bus (+) (2) Negative DC Bus (-) (3) Heat Sink (4) Current Transformer (CT) (5) Air Plenum for the Lower Fan (6) Fan x5 (7) Lower Left Panel (8) Inverter Assembly (9) Upper Left Panel
Attach the multimeter positive lead to