TS_622_02 PowerWAVE 9500DPA User Manual 26/2/19
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6
Operating Instructions 2
(for systems without a maintenance bypass)
6.1
Introduction
6.1.1 Commissioning
The PW9500DPA UPS is a high quality, complex electronic system which must be commissioned by an authorised Kohler
Uninterruptible Power Ltd. engineer before it is put into use.
The commissioning engineer will:
• check the UPS electrical and mechanical installation, and operating environment
• install and connect the UPS batteries
• check the UPS configuration settings
• check the installation and operation of any optional equipment
• perform a controlled UPS start-up
• fully test the system for correct operation
• provide customer operator training and equipment handover
6.1.2 Operating procedure summary
Under normal circumstances all the UPS modules in a multi-module system are turned on and operating in their ‘on-
inverter’ mode. If one module fails in a ‘redundant module’ system the faulty module shuts down but it will not affect the
remaining module(s), which will continue to operate normally and provide protected load power. The failed module can be
replaced by a trained UPS service engineer without affecting the operation of the UPS system.
If a UPS module fails in a ‘capacity’ rated (or single module) system, the load will immediately transfer to the static bypass
(in all modules) and will be connected to the unprotected bypass mains power supply.
Note: All the switches and control panel operations mentioned in this chapter are identified and described in chapter 2.
The commissioning engineer will hand-over the system in a fully working condition with all the UPS modules turned on and
operating in the ‘on-inverter’ mode (or ‘on bypass’ mode, if appropriate).
IMPORTANT NOTE
This chapter contains the operating instructions that should be used if the UPS system does not
contain the ‘optional’ Maintenance Bypass facility – i.e. there is no internal Maintenance Bypass
Switch fitted in the UPS cabinet and the UPS is not connected to an external Maintenance Bypass
switch panel.
If a Maintenance Bypass facility is included in the UPS system design you should use the operating
instructions contained in Chapter 5.
WARNING:
Kohler Uninterruptible Power Ltd.
will not accept responsibility for the equipment or the safety of
any personnel if the UPS system is operated before it has been fully commissioned.
The manufacturer's warranty will be invalidated if power is applied to any part of the UPS system before it has
been fully commissioned and handed over to the customer.
