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3.5
UPS Cabling procedure
WARNING: If you open or remove any UPS cabinet internal cover there is a risk of exposure to dangerous
voltages if power is connected to the UPS.
WARNING: DC cabling for the battery system(s) must be completed by an Uninterruptible Power Supplies Ltd.
engineer or one of its approved service agents.
3.5.1 Safety notes
Please ensure you read and understand the following safety notes before you begin the UPS electrical installation.
1.
All the operations detailed in this section must be performed or supervised by a qualified, authorised electrician.
2.
Once the electrical installation is completed the initial UPS start-up must be performed by a qualified commissioning
engineer, trained and authorised by the manufacturer.
3.
Do not operate the UPS if there is water or moisture present.
4.
When working on the UPS input power cables, you must ensure that the UPS input mains supply (and bypass mains
supply in a dual feed system) is isolated at the mains switchgear panel and, where possible, locked out. Warning
notices should be posted where applicable to prevent the inadvertent operation of the LV supply isolator(s).
5.
For personal protection, ensure the following conditions are met prior to starting work on the equipment:
a) No mains voltage is present from the mains switchgear panel.
b) All loads are shut down and disconnected.
c)
The UPS is shut down and voltage-free, with all internal power isolators OPEN (OFF).
3.5.2
Preparing the UPS power cabling
Before you connect the UPS input cables:
1.
Ensure that the provided fuses and cables are in accordance with the prescribed IEC Standards or local regulations
(e.g. BS7671:2008).
2.
Do not begin this procedure until the UPS is mechanically fully installed at its intended final location.
3.5.3
Connecting the UPS AC power cables
1.
Gain access to the UPS power terminals by removing the safety cover(s) at the bottom of the UPS cabinet.
2.
Connect an earth cable between the external mains switchgear panel and the UPS protective earth (PE).
3.
Connect an earth cable between the external load switchgear panel and the UPS protective earth (PE).
4.
If the UPS is to be cabled for a dual feed input ('split bypass' operation):
a) Remove the split bypass links – shown in figures 3.8 to 3.9.
b) Connect the UPS bypass mains supply cables from the mains switchgear panel to the UPS bypass mains
terminals (2L1, 2L2, 2L3, 2N), ensuring the correct phase rotation – see figures 3.8 to 3.9 for guidance.
Note: If the UPS input mains and bypass mains are derived from the same supply source in the mains distribution
panel there is no need to connect the bypass neutral. If the bypass mains is derived from a separate source, then the
bypass neutral must be permanently connected – i.e. unswitched by the bypass mains supply circuit breaker/fuses.
5.
Connect the UPS input mains supply cables from the mains switchgear panel to the UPS input mains terminals (1L1,
1L2, 1L3, 1N), ensuring the correct phase rotation – see figures 3.8 to 3.9 for guidance.
Note: The input mains neutral must be permanently connected (i.e. unswitched by the external bypass mains supply
circuit breaker/fuses).
6.
Connect the UPS output supply cables between the load switchgear panel and the UPS output terminals (3L1, 3L2,
3L3, 3N), ensuring correct phase rotation.
Note: The UPS output neutral must be permanently connected.
7.
Secure the cables to the fixing rail located under the UPS connection terminals.
TS_619_00 PW9000DPA S2 User Manual 13/3/17
3: Installation
37
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