High Voltage Equipment Calibration Services

Current Transformers 

• at primary currents up to 5000 A at 50 Hz
• at rated secondary currents of 1 A or 5 A.

to Standards:

• AS 60044.1
• AS 1675
• IEC 61869-2
• includes polarity check

Least Uncertainties:
Current Error: ±0.025%
Phase Displacement: ±0.05 crad or ±1.7 min

Voltage Transformers 

• at primary voltages up to 100 kV at 50 Hz
• at rated secondary voltages of 63.5 V or 110 V..

to Standards:

• AS 60044.2
• AS 1243
• IEC 61869-3
• includes polarity check

Least Uncertainties:
Voltage Error: ±0.03%
Phase Displacement: ±0.06 crad or ±2 min

High voltage voltmeters/dividers

Calibration:

• DC: (+ve or -ve) up to 90 kV (if HV DC test supply provided)
• DC: (+ve or -ve) up to 50 kV (if HV DC tets supply not provided)
• AC rms: up to 100 kV
• AC peak (+ve or -ve) up to 140 kV
• AC peak/√2 (+ve or -ve) up to 100 kV

• DC: ±2% of reading or ratio
• ACrms: ±4%
• ACpeak: ±4%
• ACpeak/√2: ±4%

X-ray dividers (medical, scientific)

As above for HV Voltmeters/Dividers

Insulation resistance testers

Calibration:

• at voltages up 5 kV d.c.
• from 1 MΩ to 100 GΩ

• DIgital meters: ±3% of reading
• Analogue meters: ±5% of reading (depends on meter)

High voltage testing (hv withstand, insulation tests, insulators, etc)

to Standards

• AS 1931.1
• IEC 60060-1

• AC voltages up to 100 kVrms at 50 Hz, with 20 kVA supply capacity
• AC voltages up to 300 kVrms at 50 Hz, with 3.6 kVA supply capacity (resistive load) or 7.5 kVA (capacitive load)

Puncture/withstand testing:

up to 5 kV/AC/DC ay 125 VA

• up to 5 kV at 500 VA

Insulation Resistance testing (cable, motors, insulation, etc)

• Insulation Resistance
• Polarisation Index (PI)
• Dielectric Absorption Ratio (DAR)
• Dielectric Discharge Indicator (DD)
• Step Voltage (SV)

• at voltages up 5 kV d.c.
• from 1 MΩ to 100 GΩ

High voltage operating sticks

ISSC14-Chapter 13

Guide to Electrical Workers Safety Equipment-Industry Steering Safety Committee

• Inspection
• High Voltage Withstand and Leakage Test (microamperes) at 45 kVrms per each 300 mm section

Field capability

High Voltage Voltmeters/Dividers

• DC: (+ve or -ve) up to 90 kV
• AC rms: up to 70 kV , 50 Hz to 400 Hz

• DC: ±2.5% of reading or ratio
• ACrms: ±5%

X-ray dividers (medical, scientific)

As above for HV Voltmeters/Dividers

Insulation resistance testing (cable, motors, insulation, etc)

Test parameters:

• Insulation Resistance
• Polarisation Index (PI)
• Dielectric Absorption Ratio (DAR)
• Dielectric Discharge Indicator (DD)
• Step Voltage (SV)
• at voltages up 5 kV d.c.
• from 1 MΩ to 100 GΩ