LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 4-2: CONTACTORS AND MOTOR-STARTERS - AC SEMICONDUCTOR MOTOR CONTROLLERS AND STARTERS (FIRST REVISION) (IEC 60947-4-2:2007, IDT)
This Malaysian standard applies to controllers and starters, which may include a series mechanical
This standard characterizes controllers and starters with and without bypass means.
Controllers and starters dealt with in this standard are not normally designed to interrupt
short-circuit currents. Therefore, suitable short-circuit protection (see 8.2.5) should form part
of the installation, but not necessarily of the controller or starter.
In this context, this standard gives requirements for controllers and starters associated with
separate short-circuit protective devices.
This standard does not apply to:
– continuous operation of a.c. motors at motor speeds other than the normal speed;
– semiconductor equipment, including semiconductor contactors (see 2.2.13 of IEC 60947-1)
controlling non-motor loads;
– electronic a.c. power controllers covered by IEC 60146.
Contactors, overload relays and control circuit devices used in controllers and starters should
comply with
Published
• (none) / (none) / (none)
PDF
15/05/2019
108
NSC 05 - Generation, Transmission & Distribution of Energy
