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ZTELEC has three test rooms subject to regular calibration and checks, and SIT-certified instrumentation,used to offer a laboratory service for checking insulation, making electrical measurements of any type andmeasuring leakage, even on the customer's own transformers and machinery. The laboratory service canidentify malfunctions and non-conformities in the device under test that would not be found with a visualinspection, Furthermore, the professionalism of the test room personnel and their test and measurementexperience mean they can offer constructive measures to remove problems or solutions to improveinstallation. A full test report is issued after testing.

The ZTELEC Test and Measurement Laboratory can carry out most verification tests at the installationsite. This means that correct operation of the transformer connected to the system can be verified safelyon site. The following tests can be carried out directly on site:

Visual inspection to check condition
Measure electrical resistance

Check correct operation of protectiveaccessories. Measure insulation resistance
Analyse oil to determine ppm of PCB andPCT and emission following sampling for gaschromatography

Transfommation ratio and polarity / vector group
Measure sound pressure in dB(A)

FRA - frequency response analysis - to check the mechanical condition of the core, windings and clamping structure

ZTELEC can provide maintenance throughout Europe and outside the EC. Highly qualified personnel forevery type of transformer or reactor, dry or oil, and distribution, special or power.

A range of maintenance procedures can be carried out at the installation site:

Replace insulators
Replace gaskets
Replace accessories
Repair tanks of oil transformers in the event of small leaks
Install ventilation bars or fan units on cast resin or oil transformers to provide a power increase of up to 40%
Any other work that can be carried out at the installation site

In the event of abnormal operation/falure of transformers, ZTELEC provides immediate support to verifythe problems. Following telephone support or a site inspection by specialist personnel, we can provide adetailed estimate for repair and/or replacement. The transformer repair service is avallable for any trans-former type, even those not made by ZTELEC.

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