Low Voltage Current Transformer Metering

The importance of instrument transformer tests is often underestimated.

Low voltage current transformer metering.

Low voltage single ratio metering current transformers are either a ring type or plastic molded case. Current transformer shapes and sizes vary depending on the end user or switch gear manufacturer. This is why it is necessary to match the respective currents and voltages to the values appropriate to connected measuring protection and control. The most common usage of instrument transformers is to operate instruments or metering from high voltage or high current circuits safely isolating secondary control circuity from the high voltages or currents.

Current transformers play an important role in the monitoring and protection of electrical power systems. High voltage current transformers are mounted on porcelain or polymer insulators to isolate them from the ground. Is a type of instrument transformer that is designed to produce an alternating current in its secondary winding which is proportional to the current being measured in its primary current transformers reduce high voltage currents to a much lower value and provide a convenient way of safely monitoring the actual electrical current flowing in an ac. These low voltage potential transformers 468 460 2vt469 2vt460 3vtl and 3vtn are generally housed in low voltage switchgears switchboards or motor control centers and provide the necessary voltage signals to the metering device that displays the primary system voltage value for monitoring the condition of the overall electrical system.

The current transformer c t. Current and voltage measurements from 0 6 kv to 48 kv for the protection and monitoring of medium voltage power systems. The portfolio of instrument transformers ranges from low voltage at 600 v suitable for industrial and high accuracy revenue metering all the way up to high voltage at 1 200 kv. The range of electric values in power supply systems is very extensive.

Isolate the instruments from the power circuits standardise the instruments usually at 5 amps or 1 amp the scale of the instrument according to the ct ratio then becomes the only non standard feature of. Eaton s b line series current transformer metering product line includes ct rated meter sockets ct enclosures ct mounting bases combination ct enclosure meter sockets test switches and transockets that are designed to meet customers needs in a variety of applications and are suited for many utility specifications. Ct s are instrument transformers used for converting primary current into a reduced secondary current for use with meters relays control equipment and other instruments. Metering current transformers cts are used with the measuring instruments such as ammeters voltmeters kilowatt hour meters etc to.

Split core current transformers either have a two part core or a core with a removable section.