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.