Dale Power Solutions Ltd
Salter Road, Eastfield Industrial Estate, Scarborough, North Yorkshire, YO11 3DU, UK
info@dalepowersolutions.com | www.dalepowersolutions.com |
+44 (0) 1723 583511
Installation
Siting considerations
Before unpacking and installing the unit, consider the following:
■ DO NOT expose the UPS to high temperatures, water ingress, flammable or corrosive gas, dust,
direct sunlight or explosives.
■ Locate the UPS indoors on a level surface as close as possible to the equipment it will be powering to
minimise cable voltage drops. If required, allow enough spare cable to move the UPS after
installation.
■ Maintain a gap of at least 50 cm from walls or other equipment, and ensure the ventilation holes/slots
at the front and rear of the units are not obstructed.
■ For improved product reliability ensure cool air is available at the front of the unit.
■ Battery location. We recommend you site batteries in a separate room to maintain the optimum
working temperature of between 15°C and 25°C. As an approximation, battery life is halved for every
10K (10°C) rise in temperature.
Wiring considerations
To ensure a safe installation please follow these instructions and the local electrical code of the area or
country in which you are installing the equipment:
■ If the UPS is to be supplied from a local transformer, ensure the transformer kVA rating is at least
50% greater than the UPS output kVA rating and the output is 4-wire star configuration.
■ Use circuit breakers and cables with the correct rating (see the next section).
■ Always fit an MCB between the mains supply live lines only and the UPS input (see Figure 2).
Caution:
Do not fit an MCB in the neutral line.
■ Because of the high leakage current (see
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below), permanently
hard wire all the a.c. cables.
■ Fit ring terminal crimps on the ends of all cables that fasten to studs (see
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).
■ Fit a 3 pole MCCB, with a suitable d.c. voltage rating and breaking capacity, between the battery and
the UPS (see Figure 2).
Caution:
The UPS is designed to work with a centre-tap battery only.
■ Although it may not be absolutely necessary, we recommend you fit an MCB between the UPS and
the load to protect the output load and cables in the event of a fault (see Figure 2). You may also wish
to connect the UPS output to your load via a power distribution unit (PDU).
■ Ensure correct phase rotation in the 3-phase wiring.
