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IEC 60694 PDF

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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NOTE Attention is drawn to the need to comply with local regulation relevant to pressure vessels. This test is intended to verify the contact performance under these low-voltage conditions. For ie switchgear and controlgear, new insulating oil shall comply with IEC This filter also reduces circulating radio-frequency currents in the test circuit, generated by the high-voltage transformer or picked up from extraneous sources.

It shall be measured during the last quarter of the test period by means of at least three thermometers, thermocouples or other temperature-detecting devices equally distributed around the switchgear and controlgear at about the average height of its current-carrying parts and at a distance of about 1 m from the switchgear and controlgear. The method and extent of identification of conductors, for example by numbers, colours or symbols, is the responsibility of the manufacturer.

After completion of verification, detail drawings and other data shall be returned to the manufacturer for storage.

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Testing and measurement techniques — Section The measured value of the d. Otherwise, the switchgear and controlgear shall be considered to have failed the test.

The supply system should preferably be referenced to earth i. Auxiliary switches, which are operated in conjunction with the main contacts, shall be positively driven in both directions. This identification may be limited to the ends of the conductors. Wiring should take into account the proximity of heating elements.

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The magnitude of induced voltages in a secondary system depends both on the secondary system itself and on conditions such as the earthing and rated voltage of the main circuit. After the tests, they shall still be fully operational. Alternatively, in the case of a multi-function device, the positions may be marked with graphical symbols for diagrams of IEC For particular applications, different values may be specified to the manufacturer in accordance with clause 9 of the relevant equipment standard.


The testing laboratory shall check that drawings and data schedules adequately represent the essential details and parts of the switchgear and controlgear to be tested, but shall not be responsible for the accuracy of the detailed information.

NOTE Several gas-filled compartments may be permanently interconnected to form a common gas-system gastight assembly. Test conditions 7, 8 and 9 may be omitted if the arrangement of the terminals of each pole is symmetrical with respect to the base. Except for slow operation during maintenance, the main contacts shall only 606694 under the action of the drive mechanism and in eic designed manner, and not in the case of reapplication of the energy supply after a loss of energy.

Values of columns 356 and 8 are applicable for type tests only. NOTE 4 The maximum induced voltage values may be exceeded at interfaces to instrument transformers.

P liq the drop in pressure in a given time caused by the leakage rate F liq without replenishment 3. Where a component may need adjustment during its service life, easy access should be considered without ieec of electrical shock. Appliance couplers primarily intended for industrial use, either indoors or outdoors, shall comply with the requirements iecc IEC and IEC This criteria will normally be met after a test duration of five times the thermal time constant of the tested device.

After this period, a non-operation of the switchgear and controlgear with its associated auxiliary and control circuit is acceptable provided that the functionality resets to its original characteristics when environmental conditions inside the enclosure for auxiliary and control circuits are back to the specified service conditions.

NOTE These values can be used to calculate times between replenishments, Toutside extreme conditions of temperature or frequency of operations. The IEC collaborates closely with the International Organization for Standardization Oec in accordance with conditions determined by agreement between the two organizations. Alarm pressure for operation NOTE 3 In the case of the application of ied contacts, the rated short-time withstand current iiec be reduced if current limiting equipment, other than fuses, is employed.


For higher altitude, see IEC The minimum nominal creepage distance of 600694 outdoor external ceramic 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: The surface temperature of a component immersed in a liquid dielectric shall be measured only by thermocouples attached to the surface of this component.

The voltage share is specified in 6. The manufacturer shall provide a statement to the testing laboratory of those parts that may be renewed during the tests. NOTE 1 NOTE 2 Protection against 6064 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 6094 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 ice, mm long Access with a wire test-wire 1,0 mm diameter, mm long The designation of the degree of protection corresponds to IEC Each test shall be performed: Generation, transmission and distribution of electricity?

The “common values” as used in tables 1a and 1b apply to phase-to-earth, between phases and across the open switching device, if not otherwise specified in this standard. Examples of types of standardized fuses IEC The tests shall be performed in dry conditions and also in wet conditions for outdoor switchgear and controlgear. NOTE 2 If no sufficient current is flowing through the contact, oxidation may increase the resistance. At the time of 606694, the editions indicated were valid.