Replacement batteries for an APC UPS

February 10, 2021

Replacing the batteries on this APC Smart-UPS gives the system a new lease of life.

Seasons Greetings.

December 16, 2020

Very best wishes from Cetronic Power Solutions.

New UPS Installation

December 2, 2020

Installed a new 30KVA Multi Sentry UPS system with an external manual bypass switch.

This single system replaced 3 x parallel 120KVA UPS systems as the customers load requirements had reduced dramatically.

Parallel 40KVA UPS Replacement

November 17, 2020

A postponed UPS replacement due to the Corona Virus lockdown finally received approval to proceed.

The systems were installed without interrupting power to the load due to the fact that the UPS’s were originally installed with external manual bypass switches.

Busy UPS Maintenance Period

November 11, 2020

Following the Covid-19 “lockdown”, many companies are realising that now is the perfect time (before staff return to offices) to perform planned preventative maintenance visits

Tight UPS Installation

October 28, 2020

Visited a sight the other day to maintain 4 x parallel 40KVA UPS systems.

The UPS’s are mounted on a plinth with no room to pull them forward even onto a wheeled dolly.

In order to get into these UPS’s for repair or to replace batteries you have to disconnect and take one system out of the room, which provides enough side space to work on the others. Nightmare!

Battery Replacement with Smaller Blocks

October 14, 2020

When the original batteries on a UPS needed replacing, the customers load had reduced (over the years) to about 10% of the UPS capacity.

So rather than specify 10 minutes back-up at full UPS load, it was decided that 10 minutes at the lighter load was all that was needed.

The UPS was de-rated via the set-up software and battery fuse sizing was reduced.

New smaller battery rack installed with feet spacing to mimic the previous rack

UPS Inspection and Evaluation

July 22, 2020

A recent request to inspect and evaluate a UPS installation at a high street store uncovered the fact that the UPS was shut down with batteries disconnected. All equipment normally supported by a UPS (tills, security etc.) was just being powered from normal mains power



May 13, 2020

Recently installed a 10KVA Sentryum UPS to replace a competitors old defective system. As the original installation incorporated an external manual bypass switch, the replacement UPS was installed and switched into service without the need to interrupt the power.

This is the third generation of transformerless ON LINE UPS. The 10-20 kVA Sentryum rewrites the concept of flexible power by offering a choice of three compact cabinet sizes to suit the needs of any small datacentre or mission-critical application.

Enhanced overload and short circuit capacity guarantee maximum availability. Incorporating a 5-inch colour touchscreen display and intuitive LED status indicator that automatically changes colour based on the UPS’s current operating state.


April 15, 2020

An old 6KVA UPS was replaced with a new unity power factor “SDU” (Sentinel Dual) UPS.

As the original UPS was installed with an external manual bypass switch (EMBS) there was no interruption to server power and the whole was performed seamlessly.

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