Preventive Maintenance; General Overview; Preventive Maintenance Guidelines - Delta PCS100 Maintenance Manual

Preventive Maintenance

The Delta 100kW Power Conditioning System (PCS) is a bi-directional conversion system that converts
power between energy storage and grid. Due to the complexity of the PCS100, it is recommended to
have all repairs or maintenance procedures performed by a qualified power supply technician. Before
attempting any procedures, the technician must be familiar with the components of the PCS100 and the
related procedures.
The components inside the Delta 100kW Power Conditioning System (PCS) are secured to the frame
or enclosures, which are, in turn, secured to the frame. All serviceable parts and assemblies are
designed for easy assembly and installation. The design of the PCS100 allows service personnel
convenient access for maintenance and serviceability.
It is highly recommended to develop a regular maintenance schedule to keep the PCS100 operating as
intended and prevent possible system failures.

General Overview

It is important to keep in mind that the PCS100 is designed to supply power in the event of a power
failure from the power utility grid. The internal components of the PCS100 are unsafe until the DC
power source is disconnected and the capacitors are discharged. After disconnecting the utility power
and disabling the DC power, it is recommended that authorized service personnel wait at least five
minutes for capacitor bleed-off before attempting to service any internal components.
Due to the complexity of the PCS100, it is highly recommended that all repairs be performed by a
qualified power supply technician. Before attempting any service procedures, the technician should be
familiar with the system and the operation design.
WARNING!
!
When servicing the PCS100, dangerous voltage levels may exist. All AC and DC capacitors
should be discharged. Use extreme caution when measuring primary circuitry since this is at
line potential.
Observe the following precautions before performing maintenance or servicing the PCS100:
 Remove any metal objects, rings or watches prior to attempting any work.
 Only use tools with insulated handles.
 Wear rubber gloves and boots.
 Disconnect the external power source prior to connecting or disconnecting terminals.

Preventive Maintenance Guidelines

While the PCS100 requires little preventive maintenance, it is advisable to follow a regular maintenance
schedule, which includes periodic inspection, to keep the PCS100 operating normally. The task of
maintaining or servicing the PCS100 must be performed by authorized service personnel.
WARNING!
!
Before starting any maintenance work, disengage the AC and DC capacitors. Follow the
proper power down procedures to make sure that the power cannot be inadvertently turned
back on.
Maintenance Manual 14
Preventive Maintenance