May 20, 2019
Battery change on a 40KVA UPS system following a UPS preventative maintenance visit which highlighted the requirement for replacement batteries
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.
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.
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.
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
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.
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.
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
December 18, 2018
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!