UltraTEV Plus² Confirms and Classifies Partial Discharge on Trinity Mirror HV Network
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Trinity Mirror Print, Watford
Trinity Mirror Print’s Watford site is the largest of Trinity Mirror’s seven print sites. By night it prints national titles such as The Mirror, The Racing Post and The Independent, and during the day it carries out regional and contract printing. Its presses can produce newspapers at 86,000 copies an hour, equating to approximately 45 million newspapers a month.
The site runs an 11kV, 7MVA, 50Hz private network made up of seven 11kV substations across the plant and twelve dedicated 11kV transformers for its twelve printing presses, fed via fifteen circuit breakers.
In February 2016 EA Technology carried out a site partial discharge (PD) survey using the UltraTEV Plus and UltraTEV Locator. The report highlighted PD activity in the substation switchgear.
Garry Crask, Engineering Production Manager and Senior Authorized Person on the site, requested a demonstration of the UltraTEV Plus² so the team could first confirm the location of the PD, and then use the instrument to confirm that the service provider had fixed the issue.
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