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Instrument Transformer Testing

All tests and measurements are made with instruments traceable to Australian National Standards, by staff highly experienced in testing measurement and calibration related to the electrical power industry. The particular capabilities that are within our NATA Scope of Accreditation are identified by NATA. Tests/calibrations outside the NATA Scope are identified with '(traceable)'.

INSTRUMENT TRANSFORMER ACCURACY TESTS:

Current Transformers (AS 60044.1, IEC 61869-2, AS 1675):

Current transformers by primary injection, up to 5000 A applied primary current at 50 Hz with either 1 A or 5 A rated secondary currents, at burdens of unity or 0.8 power factor lagging.

Instrument Transformer Automatic Comparator

AC Ammeters

Calibration by primary injection with one primary turn, up to 5000 A.        NATA
Ratios available:
from 0.5/5 to 5000/5 for 5 A-rated secondaries
from 5/1 to 5000/1 for 1 A-rated secondaries

AC Ammeters

Voltage Transformers (AS 60044.2, IEC 61869-3, AS 1243):


Single phase Voltage transformers by primary injection, up to 132 kV/√3 rated primary voltage at 50 Hz at 50 Hz, with either 63.5 V or 110 V rated secondary voltages, at burdens of unity or 0.8 power factor lagging.        NATA

Voltage Transformers

Instrument Transformer Test Laboratory

8 m x 6 m x 3 m high, (air-conditioned) as follows:

• High-current supply (15 kVA), up to 5000 A at 50 Hz at low voltage;

• High-voltage supply 10 kVA (20 kVA short-time) up to 100 kV at 50 Hz, short-circuit protected;

Instrument Transformer Test Laboratory

Reference Equipment

• Instrument Transformer Automatic Comparator: CT: 1 A or 5 A input; VT: 63.5 V or 110 V input.

• Standard Current Transformers: ratios 5 A - 5000 A/5 A & 1 A and ratios 0.5 A/5 A to 100 A/5 A.

• Standard Voltage Transformers: ratios from 110 V/63.5 V & 110 V, up to 33 kV/63.5 V & 110 V, with additional ratios 66 kV√3 // 110 V√3 and 132 kV√3 // 110 V√3.