IEC +A+A(E). Edition consolidated with amendments and This English-language version is derived from the. This standard applies to all high-voltage switchgear and controlgear except as otherwise specified in the relevant IEC standards for the particular type of. Find the most up-to-date version of IEC at Engineering
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Therefore, a minimum value of current may be required for class 1 contact. The values of rated normal currents should be selected from the R 10 series, specified in IEC Terminal blocks for wiring components inside the enclosure shall be chosen according to the cross-section of the conductors used.
For operation of shunt opening releases, the relative tolerance shall comply with the requirements of 5. If no other method to determine the value I t 2 t t is available, then it shall be determined from the oscillogram using the method of evaluating I t given in annex B. For these conditions, condensation may occasionally occur. Where contact with a heater or shield can occur accidentally, the surface temperature shall not exceed the temperature-rise limits for accessible parts which need not be touched in normal operation, as specified in table 3.
The test voltages are given in table 2a or 2b.
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Contactors and motorstarters — Section 2: It should not be subjected to other dielectric tests within 2 h prior to the present test. Alternatively, in the case of a multi-function device, the positions may be marked ice graphical symbols for diagrams of IEC NOTE For editorial reasons, mainly due to the characteristics of the transient recovery voltages, the subdivision in voltage ranges differs from that in IEC The impulse voltage peak value shall be 5 kV.
A voltage of 1,1 U r 3 shall be applied to the switchgear and controlgear and maintained for at least 5 min, U r being the rated voltage of the iex and controlgear.
NOTE Values higher than 2,5 or 2,6 times the rated short-time withstand current may be required according to the characteristics of the system. NOTE 5 An auxiliary contact which complies with class 1, 2 or 3 for d. Control contacts [IEV ] which are included in a control circuit of a mechanical switching device may be concerned by this table.
Point 11 The temperature shall not reach a value where the elasticity of the material is impaired. For a rated frequency of 50 Hz and below it is equal to 2,5 times the rated short-time withstand current, and for a rated frequency of 60 Hz it is equal to 2,6 times the rated short-time withstand current.
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Electric traction IEC If facilities are provided for connecting incoming and outgoing neutral, protective and PEN conductors, they shall be situated in the vicinity of the associated phase conductor terminal. The tests shall be performed in dry conditions only. If measuring impedances different from those specified in CISPR publications are used, they shall be not more than ?
Equipment for outdoor installation provided with additional protection features against rain and other weather conditions shall be specified by means of the 60649 letter W placed after the second characteristic numeral, or after the additional letter, if any. Performance of relay contacts shall comply with the requirements of IEC Annexes A, B and C form an integral part of this standard.
NOTE 4 The maximum induced voltage values may be exceeded at interfaces to instrument transformers. Where a contact other than an auxiliary or control contact is made available to the user, the technical documents 60649 by the manufacturer should include the rated continuous current and making and breaking capacity of this contact. The manufacturer shall maintain detailed design records of all component parts of the switchgear and controlgear tested and shall ensure that these may be identified from information included in the drawings and data schedules.
Ancillary equipment — Section One: The reduction of this range will be considered at a ic stage of standardization. When the manufacturer states that supplementary insulation such as tape or barriers is required to be used in service, such supplementary insulation shall also be used during the tests.
The temperature of the liquid dielectric itself shall be measured in the upper layer of the dielectric. Please contact the Customer Service Centre see below for further information. The user is responsible for ensuring that the contact performance is adequate for the task.
Guide for application of IEC 62271-100 and IEC 60694. Part I and II
At each step a radio interference measurement shall be taken and the radio interference level, as recorded during the last series of voltage reductions, shall be plotted versus the applied voltage; the curve so obtained is the radio interference characteristic of the switchgear and controlgear. For an operating device combined with a switching device, it may be sufficient to use only one combined nameplate.
Electrical installations of buildings IEC When the distance between the poles of switchgear and controlgear ifc not inherently fixed by the design, the distance between the poles for the test shall be the minimum ice stated by the manufacturer. Consolidated editions The IEC is now publishing consolidated versions of its publications.
NOTE The R 10 series comprises the numbers 1 — 1,25 — 1,6 — 2 — 2,5 — 3,15 — 4 — 5 — 6,3 — 8 and their products by 10 n. In such a case, the test should be repeated with a higher current, as close as possible to the rated normal current.
Enclosures should be constructed, insulated, made watertight, etc.
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The case, tank, frame and other normally earthed parts shall be connected to earth. The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields.
Auxiliary and control contacts shall be suitable for the number of electrical and mechanical operating cycles specified for the switching device.