Knopp Incorporated
"When You Test, Use The Best"


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Meter Testing
Transformer Testing
Precision Transformers
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Our Products

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We design and manufacture products used by the electric utility industry, manufacturers of various electrical products (such as transformers and electric motors), and professional electricians. We invite you to examine our offerings and provide us with any comments or questions you may have. We are always willing to discuss custom products to suit your specific requirements.

The pages listed at left break down our product line into manageable chunks. First, we list our line of electricity meter test equipment. This equipment is used to verify the accuracy of meters before they are used to measure energy consumption.

Our transformer test equipment performs a similar accuracy-measuring function. It is used to check the accuracy of transformers which are used to supply electricity meters. These transformers are a part of the measurement system, and, as such, their accuracy should be known as well.

Our precision transformers have many uses. Generally, they are used to extend the range of a measuring device, such as a voltmeter or an ammeter. Knopp precision transformers are also used by manufacturers of distribution transformers and electric motors to measure the electrical losses in those devices.

Knopp maintains precision reference transformers which are traceable to the United States' National Institute of Standards and Technology (NIST). We offer NIST-traceable calibrations of voltage and current transformers. Our limits are 14,400 Volts and 5,000 Amperes.

We manufacture passive burdens, both American National Standards (ANSI) and International Electrical Commission (IEC). These burdens are used in transformer testing to simulate the load which will eventually be connected to the transformer. Knopp burdens are passive in design which assures high stability and low drift over time.

We also offer a few other products which have been developed through requests from our customers. One such product is our Type CL-6 Loading Transformer. This unit is used as a current source and can produce up to 1,000 Amperes at 5 Volts.

Finally, we manufacture three  instruments used by electricians. These include our K-60 Voltage Tester (used to determine the presence or absence of voltage in electrical systems up to 600 volts) and our K-3 Phase Sequence Indicator (used to determine phase sequence in three-phase systems). We also manufacture the 4E2-1 Voltage Tester used by rapid transit districts to detect the presence, or absence, of voltage (up to 1500 volts) in the third rail of transit systems.

Our products are manufactured to the highest quality standards. Go ahead and compare, we're sure you'll be impressed.

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