AS NZS IEC 60947.5.5:2015 pdf free
AS NZS IEC 60947.5.5:2015 pdf free.Low-voltage switchgear and controlgear
In accordance with 4.4.4 of ISO 13850, when the emergency stop signal has been generated during actuation of the emergency stop device, the emergency stop function shall be maintained by latching of the actuating system. The emergency stop signal shall be maintained until the emergency stop device is reset (disengaged). It shall not be possible for the emergency stop device to latch-in without generating the emergency stop signal.In case of failure in the emergency stop device (including the latching means), the generation of the emergency stop signal shall have priority over the latching function.
When the actuator is installed according to the instructions:
– the perpendicular pulling force applied to the wire or rope necessary for generating the emergency stop signal (opening of the contacts) shall be less than 200 N;
– the wire or rope shall resist a tension force 10 times higher than the perpendicular pulling force necessary for generating the emergency stop signal;
– the perpendicular deflection of the wire or rope necessary for generating the emergency stop signal shall be less than 400 mm;
– the breaking or disengagement of the wire or rope shall generate the emergency stop signal;
In accordance with 8.1.1 and 8.1.2 of IEC 60947-1, type tests shall be made to prove compliance with the requirements of clauses 4, 5 and 6.
An emergency stop device may have combinations of both main and auxiliary contacts.The tests given in 7.5 and 7.6 are to verify that all these contacts are not adversely affected by mechanical shocks.
Some tests, for example based on visual inspection, or by checking the literature provided with the emergency stop device, require only one sample.
For the tests described in 7.3.3, 7.4, 7.5, 7.6 and 7.7, three identical samples of emergency stop device shall be selected, and each sample shall be subjected successfully to the sequence of tests, in the order given in this clause.
When more than one type of emergency stop device is manufactured to the same basic design, less than three identical samples may be tested, providing that more than three products of the same family are tested. Such an acceptance shall be fully documented.AS NZS IEC 60947.5.5 pdf free download.
