Knopp Incorporated
"When You Test, Use The Best"


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P-2000-2 Precision CT
P-5000 Precision CT
P-5000-4 Precision CT
WP-14000-4 Precision VT
WP-36000 Precision VT




Precision Transformers

Knopp has developed a worldwide reputation for designing and manufacturing voltage and current transformers with extremely high accuracy (low errors). Our capabilities include precision voltage transformers up to 36,000 Volts and current transformers up to 10,000 amperes. Typical accuracies are well within 0.02% on ratio and 2 minutes on phase angle. We can also custom-design a two-stage transformer for even better accuracy.

These transformers are commonly found in transformer test equipment used by many electric utilities and transformer manufacturers. Our transformers are also found in systems for measuring electrical losses in large distribution transformers and electric motors.

We have some "standard" catalog offerings but a large percentage of our work is in custom designs to suit specific requirements.

Our transformers are typically shipped with a Certificate of Calibration showing the accuracy as traceable to the United States' National Institute of Standards and Technology (NIST). We can also arrange for actual calibration of the transformer by NIST should that be preferred.

You may also want to check out our transformer calibration service.



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