When is ct metering required

PTs or voltage transformers reduce the voltage running through a meter socket, providing additional safety for workers. Bypass options for CT meter sockets can vary. An auto bypass, or plunger bypass, feature means when the CT meter is pulled out of the socket, the CTs are automatically shunted. A test switch is typically not used in conjunction with auto bypass sockets but can be if specified by the utility. Milbank also offers CT rated meter sockets with heavy duty lever bypass including the UXL shown here.

Milbank offers a range of CT meter sockets with the different features mentioned above available. One common option is the UCRL , a 13 terminal ringless meter socket. Download our Instrument Rated catalog to see more options. An Introduction to CTs A CT rated meter socket carries an induced current, reducing the amperage of the current running through the meter. Electrical installation work — means installation, alteration, repair or maintenance of an electrical installation.

Let's help you see the right content. Please make a selection Electrician Gasfitter Consumer View all content. We are using cookies. Energy Safe Victoria Technical information Electrical installations and infrastructure Electrical technical guidelines and determinations Contestable metering.

Legislation and regulations Electrical Safety Management Schemes Electrical technical guidelines and determinations Exemptions. I am a: Electrical Worker Gasfitter Other. The correction factor is the factor by which the reading of a watthour meter must be multiplied to correct for the effects of the error ratio and phase angle of the CT.

If your Heat Rate Program requires the metering of storage heat, baseboard heat, dual fuel, or any other electric heat, low-grade current transformers will simply not do. Our metering-grade current transformers are made from premium grade laminated silica steel cores and are manufactured to meet IEEE C Current Transformers for Metering There are two types of electric meters: self-contained direct drive and transformer rated.

We have the solution! The characteristics of a CT meter include its ratings. CT meters now are generally rated at 20 amps. This means that the current coils of the meter are capable of handling 20 amps. You may think that this is low. But, remember that CT meters are used with CTs. Also remember that CTs have outputs determined by their ratios.

They are rated with an output on the secondary side of 5 amps. If you remember, when using the rating factor of a CT it is possible for the CT to put out 20 amps.