International Electrotechnical Commission

Low-voltage switchgear and controlgear – Part 5-1: Control circuit devices and switching elements – Electromechanical control circuit devices - Edition 4.0
 N 60947-5-1

Annotation

Scope and object

This part of IEC 60947 applies to control circuit devices and switching elements intended for controlling, signalling, interlocking, etc., of switchgear and controlgear. It applies to control circuit devices having a rated voltage not exceeding 1 000 V a.c. (at a frequency not exceeding 1 000 Hz) or 600 V d.c. However, for operational voltages below 100 V a.c. or d.c., see 4.3.2.2. This standard applies to specific types of control circuit devices such as:

• manual control switches, for example push-buttons, rotary switches, foot switches, etc.;

• electromagnetically operated control switches, either time-delayed or instantaneous, for example contactor relays;

• pilot switches, for example pressure switches, temperature sensitive switches (thermostats), programmers, etc.;

• position switches, for example control switches operated by part of a machine or mechanism;

• associated control circuit equipment, for example indicator lights, etc.

NOTE 1 A control circuit device includes

(a) control switch(es) and associated devices such as (an) indicator light(s).

NOTE 2 A control switch includes (a) switching element(s) and an actuating system.

NOTE 3 A switching element can be a contact element or a semiconductor element.