MTR - Instrument transformers

Superseded by EN 61869-2:2012

EN following parallel vote

Applies to newly manufactured current transformers for use with electrical measuring instruments and electrical protective devices at frequencies from 15 Hz to 100 Hz. Applies basically to transformers with separate windings, but also to autotransformers.

Concerns requirements and tests, in addition to those given in chapter 1 of HD 553, that are necessary when inductive current transformers are used with electrical protective schemes in which the prime requirement is the maintenance of a defined performance up to several times the rated current when the current contains an exponentially decaying d.c. component of defined time constant.

D114/118: CLC/TC 96 disbanded * Superseded by EN 61558-1:2005

Deals with all aspects of safety (such as electrical, thermal and mechanical) of: a) Stationary or portable, single-phase or polyphase, air-cooled (natural or forced) isolating and safety isolating transformers; b) Stationary or portable, single-phase or polyphase, air-cooled (natural or forced) separating transformers, auto-transformers, variable transformers and small reactors. Has the status of a group safety publication in accordance with IEC Guide 104.

EN following parallel vote * Issued by BTTF 64-1 superseded by TC 96 disbanded by 114 BT * Superseded by EN 61558-1:2005

This part 2-15 of IEC 61558 applies to stationary, single-phase or polyphase, air-cooled (natural or forced) isolating transformers for the supply of group II medical locations, designed to be permanently connected to the fixed wiring of IT supply system. This standard also applies to transformers incorporating electronic circuits. This standard does not apply to external circuits and their components intended to be connected to the input and output terminals or socket-outlets of the transformer. It has the status of a group safety publication in accordance with IEC Guide 104. This part 2 is intended to be used in conjunction with IEC 61558-1.

This part of EN 60044 applies to new single-phase capacitor voltage transformers connected between line and ground for system voltages Um 72,5 kV at power frequencies from 15 Hz to 100 Hz. They are intended to supply a low voltage for measurement, control and protective functions. The capacitor voltage transformer can be equipped with or without carrier-frequency accessories for power line carrier-frequency (PLC) application at carrier frequencies from 30 kHz to 500 kHz.

EN following parallel vote ** SIST EN pomotoma razveljavljen 2008-05, preklic razveljavitve 2008-11. 2008-11 dodan tudi prevod naslova.

SIST EN pomotoma razveljavljen 2008-05, preklic razveljavitve 2008-11. 2008-11 dodan tudi prevod naslova.

Applies to new inductive voltage transformers for use with electrical measuring instruments and electrical protective devices at frequencies from 15 to 100 Hz. This standard relates basically to transformers with separate windings, but also to autotransformers. It replaces HD 554(92) plus Amendments 1 and 2 only for inductive voltage transformers. HD 554 remains in force for capacitive voltage transformers.

This part 2 of EN 61558 is intended to be used in conjunction with EN 61558-1. This international standard deals with all aspects of safety such as electrical, thermal and mechanical. This part of EN 61558 applies to stationary or portable, single-phase or polyphase, air-cooled (natural or forced), associated or independent: - constant voltage auto-transformers; - constant voltage separating transformers; - constant voltage isolating transformers; - constant voltage safety isolating transformers; having a rated supply voltage not exceeding 1 000 V a.c., a rated frequency not exceeding 500 Hz, an internal operational frequency not exceeding 30 kHz and no limitation of the rated output. It has the status of a group safety publication in accordance with IEC Guide 104

This part 2 of EN 61558 applies to stationary or portable, single-phase or polyphase, air-cooled safety isolating transformers associated or otherwise. It has the status of a group safety publication in accordance with IEC Guide 104. This part 2 supplements or modifies the corresponding clauses in EN 61558-1.

Deals with all aspects of safety such as electrical, thermal and mechanical. This part 2-13 of EN 61558 applies to stationary or portable, single-phase or polyphase, air-cooled (natural or forced), independent or associated auto-transformers, having a rated supply voltage not exceeding 1000 V a.c., a rated frequency not exceeding 500 Hz. This part 2-13 is intended to be used in conjunction with EN 61558-1. This standard replaces Chapter III of IEC 60989. It has the status of a group safety publication in accordance with IEC Guide 104.

CM prepared by BTTF 56-3 * Superseded by EN 60044-2:1999 and EN 60044-5:2004

Covers requirements, in addition to those given in HD 553 and HD 554, for transformers with combined voltage and current in the same casing.