Instrument Transformer Testing / Metering Units
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, AS 61869.2):
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.
Calibration by primary injection with one primary turn, up to 5000 A. NATA
from 0.5/5 to 5000/5 for 5 A-rated secondaries
from 5/1 to 5000/1 for 1 A-rated secondaries
Voltage Transformers (AS 60044.2, IEC 61869-3, AS 1243, AS 61869.3):
Single phase Voltage transformers by primary injection, up to 66 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
Interposer transformers, of 1:1 ratio, at rated voltages up to 110 V, at 50 Hz. NATA
Instrument Transformer Test Laboratory
8 m x 6 m x 3 m high, (air-conditioned), expandable with additional air-conditioned Annex (3.5 m x 2 m x 3 m high), 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, adjustable;
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 ratio 66 kV√3 // 110 V√3.
Active CT/VT Burden unit, 1/5 A and 63.5 /110 V
Power Meter, a.c. and d.c.
Revenue Metering Unit