Abb instrument transformers

Transformers used to feed measuring instruments , electricity meters, protection relays and similar equipment. In modern substation current and voltage transformers can be replaced by sensors. Instrument transformers will transmit the signal to the metering and protective relaying instrumentation, with the purpose of protection of important equipment. Voltage units are available for line-to-line applications, designated by Y, and for line-to-ground applications, designated by GY.

Indoor voltage transformers - Insulation level from up to 40.

Transformers can be equipped with fuse, introduced in the primary winding, or without fuse.

Product scope - ANSI indoor voltage transformers.

Designed for service in metal- clad switchgear and used for metering, relaying, or control power. Single, double, and tapped secondary designs with two accuracy and thermal rating options. We offer wide range of conventional instrument transformers as well as electronic instrument transformers , shortly called sensors. Our conventional instrument transformer portfolio includes various types of products for indoor applications in medium voltage and for indoor and outdoor applications in high voltage systems.

There are three primary applications for which. General principles of measuring current and voltage. Current transformers operating principles. Variation of errors with current.

Electronic Instrument Transformers (Sensors) offer an alternative way of making the current and voltage measurements. Sensors based on alternative principles have been introduced as successors to conventional instrument transformers in order to significantly reduce size, increase safety, and to provide greater rating . A solution for high accuracy voltage measurement of your electric power grid. Gas-insulated instrument transformers to enhance safety and reliability, and decrease maintenance costs. All our current transformers are built-to-order to customer specifications.

Externally mounted bushing current transformers are designed for use on existing power transformers or circuit breakers for relaying purposes. Installation time is minimum since it is not necessary to remove bushings or open the tank for mounting. The PA current transformers are used in electric power grids with system voltage of up to 1kV and frequency of Hz. The IMC is an indoor current transformer used with indicating instruments for switchboards and other industrial applications.

Applicable to single or polyphase low voltage circuits, a single 600:ratio unit will perform at the 0. The PV voltage instrument transformers are used in electric power grids with system voltage of up to 1kV and frequency of Hz. ABB Guangdong Sihui Instrument Transformer Co. The history of developing and .