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4: Installation
4.4
Power cabling
It is the customer's responsibility to provide all the external fuses, isolators and cables that are used to connect the UPS
input and output power supplies.
Paragraph 3.3 describes the following UPS power configurations and provides recommended fuse ratings:
• Single input cabling with common battery (see Figure 3.6 on page 38)
• Single input cabling with separate batteries (see Figure 3.7 on page 39)
• Dual input cabling with common battery (see Figure 3.8 on page 40)
• Dual input cabling with separate batteries (see Figure 3.9 on page 41)
Please study the information provided in paragraph 3.3 (see "Electrical and cabling planning," on page 35) before you
begin cable installation.
Key Point: This information given for guidance only and all fuses, isolators and power cables must be rated and
installed in accordance with the prescribed IEC standards or local regulation – e.g. BS7671:2008.
4.4.1
Safety notes
Please ensure you read and understand the following safety notes before you begin the UPS electrical installation.
1.
Do not start cabling the UPS before its mechanical installation is completed.
2.
The power cable installation procedure must be performed or supervised by a qualified electrician.
3.
Do not connect power cables to the UPS if there is water or moisture present.
4.
Before you work on the UPS power cables or power terminations, you must ensure that the UPS input/bypass mains
supplies are isolated and 'locked-out' at their respective mains switchboards. Post warning notices to avoid any
inadvertent operation of the UPS external supply isolators. Similarly, ensure that the UPS AC output supply is isolated
and locked out at the UPS output distribution panel.
5.
Before you connect the UPS power cables ensure that the fuses and cables are suitably rated in accordance with the
prescribed IEC standards or local regulations – for example BS7671.
6.
Once the electrical installation is completed the UPS must be commissioned by an engineer authorised by Kohler
Uninterruptible Power Ltd. before it is powered up and brought into use.
7.
If an external maintenance bypass facility is used you should familiarise yourself with its operation and input/output
power connections as these determine the source/destination of the UPS input and output power cables.
WARNING: Do not apply electrical power to the UPS before it has been commissioned.
8.
When installing the UPS cables ensure that the connection procedures are performed under the following conditions:
a) No mains voltage is present at the UPS mains/bypass switchboard terminals.
b) All loads are shut down and isolated at the UPS output distribution panel.
c)
The UPS is fully shut down and voltage-free.
d) The UPS maintenance bypass switch is IA1 is open (and external maintenance bypass switch, if used).
4.4.2
Power connections
Cable access
The PW8000DPA ST power cables are connected to a terminal block which is located in the lower front of the cabinet.
ADD CABLE ENTRY/GLANDING DETAILS
Terminal block connections
The ST-40 and ST-60 models have internal batteries so no battery terminal block is provided.
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Troubleshooting
