Contact Sales. Compare The maximum number of products that can be compared is 4. Overcurrent or undercurrent in window mode Overcurrent or undercurrent detection. Adjustable Screw terminals, 1 x 0. AWG 11 solid without cable end Screw terminals, 2 x 0. AWG 14 solid without cable end Screw terminals, 1 x 0. AWG 12 flexible with cable end Screw terminals, 2 x 0.
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IEC 60255-6 Electrical relays - Measuring relays and protection equipment
Permission to photocopy portions of any individual standard for educational classroom use can also be obtained through the Copyright Clearance Center. The standard has also been updated to include many changes to provide for a more effective document that is now representative of currently manufactured relay products used in the industry. The changes are as described in the following list. Clause 3, Definitions, has been revised to provide for alphabetical classification by function.
Clause 4, Service conditions, has been revised to provide categories for specific temperature ranges and differentiation of ambient and extreme temperature ranges. Relative humidity now specifies relay or relay systems. Other conditions have been changed to show numeric designations. Clause 5, Electrical ratings, specifies additional standard current and voltage ratings and notes, applicable to Table 3.
Table 4 specifies additional maximum design voltages for dc control.
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A subclause has been added to address latching current requirements. Clause 6, Heating limits of temperature rise for coils, has been revised to add information on how the temperature rise of the coils is to be determined. Clause 7, Mechanical requirements, has been added to provide information on the mechanical durability of relays, plug-in feature requirements, and relay setting controls to harmonize with current IEC requirements.
Clause 8, Insulation tests, was changed from Dielectric tests and now includes the requirement for an impulse voltage test as a design test. Table 9 and Figure 1 have been added to this clause. In preparing this standard, consideration has been given to the work of other committees, and especially to international standards that have been published or that are under preparation by Technical Committee 95 of IEC. Users are encouraged to check this URL for errata periodically.
Patents Attention is called to the possibility that implementation of this standard may require use of subject matter covered by patent rights. The IEEE shall not be responsible for identifying patents or patent applications for which a license may be required to implement an IEEE standard or for conducting inquiries into the legal validity or scope of those patents that are brought to its attention. Participants At the time this standard was completed, the C Beckwith Thomas R. Beckwith Jeffrey Burnworth John W. Chadwick, Jr. Clifford L. Downs John J.
Horwath James D. Johnson Peter A. Kotos Michael J. Strang Robert J. Sullivan John Tengdin David Viers The following members of the individual balloting committee voted on this standard. Balloters may have voted for approval, disapproval, or abstention. Angle Stan J. John J. Strang Charles Sufana Robert J. Mills, Chair Richard H.
Bowman Dennis B. Guenin Mark S. Halpin Raymond Hapeman William B. Hopf Lowell G. Johnson Herman Koch Joseph L. Law Daleep C. Mohla Paul Nikolich T. Olsen Glenn Parsons Ronald C. Petersen Gary S. Robinson Frank Stone Malcolm V. Thaden Richard L. Townsend Joe D. Watson Howard L.
BS EN 60255-6:1995
Contents 1. Normative references Special terms Service conditions Electrical ratings Heating limits of temperature rise for coils Mechanical requirements Insulation tests Overview This standard specifies standard service conditions, standard ratings, performance requirements, and testing requirements for relays and relay systems used to protect and control power apparatus. The standard establishes a common reproducible basis for designing and evaluating relay and relay systems.
Annex A provides a cross-reference to the applicable IEC standards. Certain specific tests required for relays and relay systems are covered in separate IEEE standards as noted below. Standardized test waveforms that are representative of surges observed and measured in actual installations are applied to the terminals of the system.
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The relay or relay system must be able to withstand the applied surges without damage to components and without operating incorrectly. The tests establish a method to evaluate the susceptibility of the relay under test to single frequency electromagnetic fields in the radio frequency domain, such as those generated by portable or mobile radio transceivers. Generators which that produce a standard waveform are used to apply discharges to conductive and non-conductive points on equipment under test.
It does not cover relays designed primarily for industrial control, for switching communication or other low-level signals, or any other equipment not intended for control of power apparatus. Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies.
BS EN - Electrical relays. Measuring relays and protection equipment
For undated references, the latest edition of the referenced document including any amendments or corrigenda applies. Special terms A relay is an electric device designed to respond to input conditions in a prescribed manner and, after specified conditions are met, to cause contact operation or similar abrupt change in associated electric control circuits. A relay may consist of several relay units, each responsive to a specified input, with the combination of units providing the desired overall performance characteristic of the relay. Inputs are usually electrical but may be mechanical, thermal, other quantities, or a combination of quantities.
Limit switches and similar simple devices are not relays.
Related IEC 60255-6 Electrical relays - Measuring relays and protection equipment
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