UPS Battery Change

May 20, 2019

Battery change on a 40KVA UPS system following a UPS preventative maintenance visit which highlighted the requirement for replacement batteries


UPS Battery change

April 24, 2019

UPS Battery change for a 120KVA UPS system. Two parallel strings of batteries (individually fused/switched) enables one string to be taken out of service, so that the system can continue to operate should a power failure occur.


Power consumption and harmonic monitoring

April 12, 2019

After all the razzle-dazzle of DCW (Data Centre World), it’s back to the real world. Power consumption and harmonic monitoring on a 1,000kVA LV switchboard in an aluminium melting plant.


UPS maintenance

March 26, 2019

The importance of regular UPS maintenance cannot be overstated. A battery change and new cooling fans gave this 60KVA UPS a new lease of life.


300 UPS systems ready for delivery

March 14, 2019

Busy couple of months as we test and deliver nearly 300 small (pluggable) on-line and line-interactive UPS systems ranging from 1000VA to 3KVA


Master Plus UPS Installation

February 26, 2019

UPS project recently completed with parallel Master Plus UPS’s, each with two parallel strings of 10 year design life front access sealed lead acid batteries to provide each UPS with 6 hours autonomy at full load. A wall mounted external manual bypass switch (EMBS) allows for bypassing the parallel UPS’s seamlessly or isolating either UPS for maintenance. The EMBS is also fitted with a load bank connection socket.

Site acceptance tests (SAT’s) incorporating power disturbance monitoring, thermal imaging and a full battery discharge test on each system were also performed.


Sentinel Dual

February 7, 2019

Sentinel Dual 10KVA with additional battery pack being tested prior to shipment. The “Dual” brand can be installed as a stand-alone unit (tower) or 19” rack mounted.  Universal/adjustable rack supports are available together with SNMP/Network cards.

Active Harmonic Filters

January 17, 2019

Commissioned an Active Harmonic Conditioner yesterday. It’s nice when you can immediately see the effect that the conditioner has on the high harmonic currents drawn by this site.

Top graph          Harmonic Conditioner – ON

Bottom graph  Harmonic Conditioner – OFF

  • Small Harmonic Graphs

Happy Christmas

December 18, 2018

SS_Christmas 2018 small

21 year old UPS that has never failed!

December 6, 2018

Had a trip down memory lane recently. Cetronic installed this parallel redundant UPS system with plante batteries back in 1997. Although the system is about to be replaced it’s never failed in 21 years!LinkedIn Reliable UPS0001LinkedIn Reliable UPS0002

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