Laboratory

ABOUT THE LABORATORY

Starting from 2020, the laboratory of European standards, equipped with tools manufactured by Megger, has started functioning in JSC “Energoservice”.

JSC “Energoservice” owns following measuring equipments:
1. S1-1568 – 15 kV high performance diagnostic insulation tester;
2. TRAX 220 – Multifunction transformer and substation test system;
3. TDX 120 – High 12 kV viltage unit for tan delta, capacitance and excitation current measurements (TRAX additional accessory);
4. MRCT – Voltage and current transformer test instrument;
5. MRU-200-GPS – Earth resistance meter;
6. АИД-70 – AC/DC high voltage test system;

Our laboratory can make below listed measurements:

Power transformers and reactors

1. Measurement of no-load loss and current at low voltage/excitation current;
2. Magnetic balance test on 3 phase transformer;
3. Measurement of voltage ratio and check of phase displacement;
4. Verification of vector group and polarity;
5. Measurement of winding resistance;
6. Measurement of short circuit resistance at low voltage;
7. Insulation resistance tests of winding and magnetic circuit;
8. Measurement of capacitance and dissipation (individual temperature correction) factor (tgδ) between windings-to-earth, and between windings;
9. Demagnetization.

High voltage insulated bushings

1. Insulation resistance tests;
2. Measurement of capacitance and dissipation factor (tgδ) (individual temperature correction).

Current transformer

1. Measurement ratio error and phase displacement for all classes according to standard of issue;
2. Measuring magnetic flux by considering core saturation;
3. Measurement of winding resistance;
4. Measurement winding insulation resistance;
5. Measurement of capacitance and dissipation factor (tgδ).

Voltage transformer (VT, CVT)

1. Measurement ratio error and phase displacement for all classes according to standard of issue;
2. Measurement of winding resistance;
3. Measurement winding insulation resistance;
4. Measurement of capacitance and dissipation factor (tgδ) for capacitance voltage transformer (CVT).

Circuit breakers

1. Contact resistance;
2. Timing of operation (close/open/open-close/close-open/open-close-open);
3. Measurement pole insulation resistance.

Disconnector

1. Contact resistance;
2. Measurement pole insulation resistance.

Surge arrester

1. Measurement insulation resistance;
2. AC/DC high voltage test with measurement of leakage current.

Cables

1. Measurement insulation resistance before and after high voltage test;
2. AC/DC high voltage test with measurement of leakage current.

Switchgear

1. Measurement insulation resistance;
2. AC/DC high voltage test with measurement of leakage current.

AC motors / Generators

1. Measurement insulation resistance before and after high voltage test;
2. AC/DC high voltage test with measurement of leakage current;
3. Measurement of winding resistance.

Measurement of ground resistance

1. Earth resistance measurement;
2. Measurement of ground resistivity.

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