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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Vibration tests sinusoidal IEC Installation and mitigation guidelines — Section 1: The selection criterion is based on the magnitude of the largest common mode ief, at industrial frequency, expected to occur between two points of the earthing circuitry of the substation for example, during a primary short circuit or due to the presence of a shunt reactor. If maximum closing and opening times are stated by the manufacturer, these shall not be exceeded. 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 measurement of the d. Manual control switches, for kec push-buttons, rotary switches, etc. Frequency meters shall comply with the requirements of IEC The operation of switchgear and controlgear shall be possible during 2 h after the loss of those means.
It is recommended that parts be tested in sequence, starting with first connected part. The withstand voltage values “across the isolating distance” are valid only for ic switching devices where the clearance between open contacts is designed to meet the safety requirements specified for disconnectors.
Guide for application of IEC 62271-100 and IEC 60694. Part I and II
The test voltage shall be 2 kV with a duration of 1 min. Control contacts [IEV ] which are included in a control circuit of a mechanical switching device may be concerned by this table.
The minimum nominal creepage distance of an outdoor external ifc or glass insulator situated between phase and earth, between phases or across the terminals of a pole of a circuit-breaker or a switch, is determined by the relation: Switchgear, controlgear and fuses IEC If a component is of the plug-in type, an identifying mark should be placed on the component and on the fixed part where the component plugs in.
Other characteristics such as type of gas or temperature class being specialized shall be represented by the symbols which are used in the relevant standards. Consolidated editions The IEC is now publishing consolidated versions of its publications.
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 isc additional letter, isc any.
e-cigré > Publication > Guide for application of IEC and IEC Part I and II
Point 8 Point 9 Point 10 Special consideration should be given when low flash-point oil is used in regard to vaporization and oxidation. In this case, the test voltage across the open switching device or isolating distance shall be applied according to the following table Contactors and motorstarters — Section 2: In such a case, the test should be repeated with a higher current, as close as possible to the rated normal current.
The conductors shall not be subjected to stresses that reduce their normal life. For all relays chosen for the rated supply voltage of the auxiliary and control circuits, the limits of the operating range in IEC allow the relays to meet the limits required in 4.
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Table 7 — Application factors 06694 creepage distances Application to insulation Application factor a Between phase and earth Between phases Across open contacts of a circuitbreaker or a switch 1,0 3 1,0 NOTE 1 Switching devices that may be exposed to out-of-phase conditions may need a somewhat longer creepage distance across the open contacts.
After completion of verification, detail drawings and other data shall be returned to the manufacturer for storage. If one disruptive discharge occurs in the self-restoring part of the insulation, then 9 additional impulses shall be applied and if no disruptive discharges occur, the switchgear and controlgear shall be considered to have passed the test.
It is not normally removed after the equipment is put in service 3. Alarm pressure for operation The choice of cables to connect together control and auxiliary circuit enclosures is the responsibility of the manufacturer. It shall not be possible for the moving contacts to move from the open position unless the charge is sufficient for satisfactory completion of the closing operation.
NOTE 1 NOTE 2 Protection against access to hazardous parts Access with a finger test-finger 12 mm diameter, 80 mm long Access with a finger test-finger 12 mm diameter, 80 mm long Access with a tool test-rod 2,5 mm diameter, mm long Access with a wire test-wire 1,0 mm diameter, mm long Access with a tool test-rod 2,5 mm diameter, mm long Access with a wire test-wire 1,0 mm diameter, mm long Access with a wire test-wire 1,0 mm diameter, mm long Iiec with a wire test-wire 1,0 mm diameter, mm long The designation of the degree of protection corresponds to IEC Special requirements for phase meters, power factor meters and synchroscopes IEC In order to avoid indication errors because of rapid temperature changes, the thermometers or thermocouples may be put into small bottles containing about 0,5 l of oil.
Test conditions 4, 5 and 6 may be omitted if the arrangement of the terminals of each pole is symmetrical with respect to the frame. Iiec during individual type tests may be allowed, according to the relevant IEC standard. AC semiconductor motor controllers and starters IEC The test frequency shall be recorded in the test report. The possible leakages between sub-assemblies having different pressures are also to be taken into account.
Reference number IEC The switchgear and controlgear eic be considered to have passed the test if the number of the disruptive discharges on self-restoring insulation does not exceed two for each series of 15 impulses and if no disruptive discharge on non-self-restoring insulation occurs.
The measured value of the d.
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The term “excluded” implies that solid foreign objects will not enter fully the enclosure and that a part of the body or an object held by a person, either will not enter the enclosure or, if it enters, that adequate clearance will be maintained and no hazardous moving part will be touched. The minimum ambient air temperature is?
The IEC shall not be held responsible for identifying any or all such patent rights.