ISS EIT.ERE - All-or-nothing electrical relays

EN-IEC 60255-181 specifies the minimum requirements for functional and performance evaluation of frequency protection. This document also defines how to document and publish performance test results. This document covers the functions based on frequency measurement or rate of change of frequency measurements. This document also covers frequency protection where additional blocking elements are used. This document defines the influencing factors that affect the accuracy under steady state conditi...view more

This part of IEC 62246 which is a blank detail specification defines requirements and tests for
reed switches for use in general and industrial applications.
This document is intended to be used in conjunction with IEC 62246-1:2015 and specific
products standards applying as switching elements.
This document selects from IEC 62246-1:2015 and from other sources the appropriate test
procedures to be used in detail specifications derived from this specification.
Reed switch types are specifie...view more

2018-04 AJC - IEC published corrigendum.

This part of IEC 61810 specifies reliability test procedures for electromechanical elementary
relays when enhanced requirements for the verification of reliability apply.
Particular provisions are given for relays incorporated in safety-related control systems of
machinery in accordance with IEC 62061 and ISO 13849-1. For such relays, B10 values for
dangerous failures (B10D values) are derived from the tests specified in this document.

This part of IEC 61810 covers test conditions and provisions for the evaluation of endurance
tests using appropriate statistical methods to obtain reliability characteristics for relays.
This document applies to electromechanical elementary relays considered as non-repaired
items (i.e. items which are not repaired after failure).
The lifetime of a relay is usually expressed in number of cycles (CTF). Therefore, whenever
the terms “time” or “duration” are used in IEC 61649, they carry the me...view more

This part of IEC 61811 applies to electromechanical telecom elementary relays. Relays
according to this standard are provided for the operation in telecommunication applications.
However, as electromechanical elementary relays, they are also suitable for particular
industrial and other applications.
This standard selects from IEC 61810 series and other sources the appropriate methods of test to
be used in detail specifications derived from this specification, and contains basic test
schedu...view more

This part of IEC 62246 which is a generic specification applies to all types of reed switches
including magnetically biased reed switches of assessed quality for use in general and
industrial applications.
NOTE 1 Mercury wetted reed switches are not covered by this standard due to their possible environmental
impact.
It lists the tests and measurement procedures which may be selected for use in detail
specifications for such reed switches.
This standard applies to reed switches which are ...view more

This part of IEC 61810 specifies special requirements and tests for elementary relays with
forcibly guided contacts, also known as mechanically linked contacts. These special
requirements apply in addition to the general requirements of IEC 61810-1.
NOTE 1 This standard does not apply to electromechanical control circuit devices as described in IEC 60947-5-1.
NOTE 2 IEC 61810-2-1 provides guidelines for the assignment of reliability values.
NOTE 3 Contacts that are not mechanically linked (...view more

This part of IEC 61810 applies to electromechanical elementary relays (non-specified time allor-
nothing relays) for incorporation into low voltage equipment (circuits up to 1 000 V
alternate current or 1 500 V direct current). It defines the basic functional and safety
requirements and safety-related aspects for applications in all areas of electrical engineering
or electronics, such as:
• general industrial equipment,
• electrical facilities,
• electrical machines,
• electrical applian...view more

EN IEC 60255-121 specifies minimum requirements for functional and performance evaluation of distance protection function typically used in, but not limited to, line applications for effectively earthed, three-phase power systems. This standard also defines how to document and publish performance tests. This standard covers distance protection function whose operating characteristic can be defined on an impedance plane and includes specification of the protection function, measurement characteri...view more

EN IEC 60255-27 describes the product safety requirements for measuring relays and protection equipment having a rated a.c. voltage up to 1 000 V with a rated frequency up to 65 Hz, or a rated d.c. voltage up to 1 500 V. Above these limits, IEC 60664-1 is applicable for the determination of clearance, creepage distance and withstand test voltage. This standard details essential safety requirements to minimize the risk of fire and hazards caused by electric shock or injury to the user. This stand...view more

This part of the IEC 60255 series is applicable to measuring relays and protection equipment, taking into account combinations of devices to form schemes for power system protection including the control, monitoring, communication and process interface equipment used with those systems. This standard specifies the requirements for electromagnetic compatibility for measuring relays and protection equipment. Tests specified in this standard are not required for equipment not incorporating electron...view more

IEC 60255-127 specifies minimum requirements for over/under voltage relays. The standard includes specification of the protection function, measurement characteristics and time delay characteristics. This standard defines the influencing factors that affect the accuracy under steady state conditions and performance characteristics during dynamic conditions. The test methodologies for verifying performance characteristics and accuracy are also included in this standard.

This part of the IEC 60255 series is applicable to measuring relays and protection equipment, taking into account combinations of devices to form schemes for power system protection including the control, monitoring, communication and process interface equipment used with those systems. This standard specifies the requirements for electromagnetic compatibility for measuring relays and protection equipment. Tests specified in this standard are not required for equipment not incorporating electron...view more

This part of the IEC 60255 series specifies minimum requirements for thermal protection relays. This standard includes specification of the protection function, measurement characteristics and test methodologies. The object of this standard is to establish a common and reproducible reference for evaluating dependent time relays which protect equipment from thermal damage by measuring a.c. current flowing through the equipment. Complementary input energizing quantities such as ambient, coolant, t...view more

This part of the IEC 62246 which is a quality assessment specification defines requirements and tests to reed switches for use in general and industrial applications. This standard is intended to be used in conjunction with IEC 62246-1:2011. This standard selects from IEC 62246-1:2011 and from other sources the appropriate test procedures to be used in detail specifications derived from this specification. Reed switch types are specified depending on characteristic values and tests.

This part of IEC 61810 specifies reliability test procedures for electromechanical elementary
relays when enhanced requirements for the verification of reliability apply.
Particular provisions are given for relays incorporated in safety-related control systems of
machinery in accordance with IEC 62061 and ISO 13849-1. For such relays B10 values for
dangerous failures (B10d values) are derived from the tests specified in this standard.
This International Standard is only intended to be used ...view more

Will supersede EN 62246-1:2002

This part of IEC 61810 covers test conditions and provisions for the evaluation of endurance
tests using appropriate statistical methods to obtain reliability characteristics for relays. It
should be used in conjunction with IEC 61649.
This International Standard applies to electromechanical elementary relays considered as
non-repaired items (i.e. items which are not repaired after failure), whenever a random
sample of items is subjected to a test of cycles to failure (CTF).
The lifetime o...view more