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SUPPORTING POWER

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UNINTERRUPTABLE POWER SUPPLIES

SUPPLY

INSTALL

MAINTENANCE

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AC ELECTRICAL

EXTRA SOCKETS UNIT

NEW CONSUMER UNITS

FULL
REWIRES

ALL TO BS7671

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DC POWER SYSTEMS

SUPPLY

INSTALL

ROUTINE
MAINTENANCE

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SUPPORT CONTRACTS DESIGNED TO MEET
CUSTOMERS' INDIVIDUAL REQUIREMENTS

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These batteries had been removed from a customers site.

The age of the battery played no part in it’s premature failure - just neglect.

The investigation into this failure concluded that the float voltage on the power supply had drifted from the pre-set 54.5 volts to 59.2 volts.

The result of the incorrect setting was that the battery had been overcharged for many months causing it to eventually catch fire.

Thankfully the case design meant that the worst the battery could do before it was noticed was to smoulder badly.

However the next step would have been thermal run-away.

An annual maintenance visit would have prevented this from happening; financial constraints were blamed for the neglect.

Customer comments were deemed unsuitable for this document.