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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660694 This criteria will normally be met after a test duration of five times the thermal time constant of the tested device. Some insulating materials retain a charge after an impulse test and for these cases care should be taken when reversing the polarity.
Guide for application of IEC 62271-100 and IEC 60694. Part I and II
A clear distinction shall be made between internal and external tightness. Please contact the Customer Service Centre see below for further information. A complete secondary system may consist of parts belonging to both classes.
The second objective is to limit the fire impact, if fire or ignition occurs inside the enclosure. For three-pole switchgear and iecc with a rated normal current not exceeding A, the tests may be made with all poles connected in series.
Procedure C of IEC may be applied as an alternative to the 15 impulses withstand test. Point 7 When materials other than those given in table 3 are used, their properties shall be considered, notably in order to determine the maximum permissible temperature rises. For example, edition numbers 1. The temperature of the liquid dielectric itself shall be measured in the upper layer of the dielectric. The rated peak withstand current shall correspond to the rated frequency.
Cable couplers primarily intended for industrial use, either indoors or outdoors, shall comply with the requirements of IEC and IEC Alarm pressure for operation Damp heat, steady state IEC Means shall be provided to enable gas systems to be safely replenished whilst the equipment is in service.
In the case of a single-phase test, the following shall apply: Information about dielectric tests is given in annex F. In the dielectric testing of switchgear and controlgear incorporating vacuum switching devices, precautions should be taken to ensure that the level 60649 possible emitted X-radiation is within safe 606994.
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Equipment for outdoor installation provided with additional protection features against rain and other weather conditions shall be specified by means of the supplementary letter W placed after the second characteristic numeral, or after iiec additional letter, if any. P liq the drop in pressure in a given time caused by the leakage rate 60964 liq without replenishment 3. Installation and mitigation guidelines — Section 2: Where household humidity sensing controls are applied, they shall comply with the requirements of IECwhich sets the particular requirements for automatic electrical humidity sensing controls for household and similar use.
Where lighting is installed, consideration should be given to lec heat and electromagnetic noise produced by the lighting on the auxiliary and control-circuit components. Only one conductor should be connected to a terminal; the connection of two or more conductors to one terminal is permissible only in those cases where the terminal is designed for this purpose. The tests shall be performed in dry conditions and also in wet conditions for outdoor switchgear and controlgear. Auxiliary switches, which are operated in conjunction with the main contacts, shall be positively driven in both directions.
Switching devices, the incorrect operation of which can cause damage or which are used for assuring isolating distances, shall be provided with locking facilities as specified to the manufacturer for example, provision of padlocks.
Some of them are recalled hereunder for easier use. Supplementary requirements for fuses for use by authorized persons fuses mainly for industrial application — Iwc I to V: Values of columns 356 and 8 are applicable for type tests only.
e-cigré > Publication > Guide for application of IEC and IEC Part I and II
Low-voltage circuit-breakers incorporating residual current protection shall also comply with IEC NOTE 1 Due to the absence of oxygen, a harmonization of the limits of temperature for different contact and connection parts in the case of SF 6 switchgear 6094 appropriate. Testing and measurement techniques — Ripple on d. Each test shall be preceded by a no-load operation of the mechanical switching device and, with the exception of earthing switches, by measurement of the resistance of the main circuit.
Vibration, shock, bump and seismic tests on measuring relays and protection equipment — Section 3: The test arrangement shall be noted in the test report. Iwc auxiliary and control circuits of switchgear and controlgear shall be considered ice have passed the tests if no disruptive discharge occurs during each test. If they are required for gradient distribution, they shall remain in position for the test.