UPS471-02-00 PW9000DPA User Manual UK Dated 06/08/14
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4: Operation
4.1
Introduction
The PowerWave 9000 UPS system must be commissioned by a fully trained field service engineer authorised by
Uninterruptible Power Supplies Ltd before it is put into use.
The commissioning engineer will:
• Connect the UPS batteries.
• Check the UPS electrical installation and operating environment.
• Check the UPS cabinet paralleling configuration settings.
• Check the installation of any optional equipment.
• Perform a controlled UPS start-up and functionally test the system for correct operation and configuration.
• Carry out customer operator training and equipment handover.
4.1.1 Operating procedure summary
Under normal circumstances all the UPS modules in a multi-module system are running and operating in their ‘on-line’ (on
inverter) mode. If a module fails, in a redundant module system the faulty module will shut down but will not affect the
remaining on-line modules, which will continue to supply the load with processed power. The failed module can then be
replaced or tested off-line without affecting the remaining working modules.
If a UPS module fails in a capacity (or single module) system, the faulty module is shut-down and the load is immediately
transferred to the static bypass supply (in all modules) from where it is supplied with unprotected mains power.
The UPS cabinet contains a maintenance bypass switch which, when closed, completely bypasses the UPS modules and
connects the cabinet output terminals directly to its bypass mains input. When operating via the maintenance bypass
switch, the UPS modules can be replaced or tested off-line as required. In the case of a single module installation the load
must be transferred to the maintenance bypass to maintain the load power while the UPS module is replaced.
Note:
All the switches and control panel operations mentioned in this chapter are identified and described in chapter 2.
4.2
Operating Instructions
The following procedures are provided in this section:
• Starting the UPS system from the maintenance bypass
(see paragraph 4.2.1)
.
• Individual module start/stop procedure in a parallel system
(see paragraph 4.2.2)
.
• Transfer the load from UPS to maintenance bypass mode
(see paragraph 4.2.3)
.
• Complete system shutdown
(see paragraph 4.2.4)
.
4
Operation
WARNING:
Uninterruptible Power Supplies Ltd. accepts no responsibility for the equipment or the safety of any
personnel when operating this equipment before it has been properly commissioned.
The manufacturer's warranty is immediately invalidated if power is applied to any part of the UPS system before
it has been fully commissioned and handed over to the customer.
WARNING:
The procedures given below must be performed only by a trained operator.
