The design and manufacture of test equipment and instruments for the worldwide electricity supply industry is our speciality.
From our factory in Australia we export most of our production to countries throughout the world.
Check the standard product listing on the left. We also make customised products.
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MODEL 590F LIVE HV CT TESTER |
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 Accurate testing of live HV CTs is made possible using
the Model 590F in combination with our Model 590G.
The primary current is measured with a hot stick mounted
590F-1 unit, which has an electronically compensated.
clipon CT. The unit is battery powered and uses a fibre
optic link for transmitting primary current information to
the Model 590G which can be 400M away.The 590G measures the CT secondary current and computes the ratio and phase error of the CT. The measurement accuracy is typically better than 0.1% for primary currents from 25A up to 1450A. The hotstick is rated at 100kV although the breakdown voltage of the hotstick and fibre optic cable is much higher. For higher voltage CTs a longer hotstick can be used. The main issue is operator safety, not voltage rating of the 590F. A large jaw clipon rated 2,500A is also available with the 590F for live testing of LV CTs. |
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