UL 60947-5-1:2014 PDF Download

The UL 60947-5-1:2014 standard specifies the requirements and tests for control circuit devices and switching elements used in switchgear and controlgear systems.

The standard applies to control circuit devices with a rated voltage not exceeding 1,000 V AC (at a frequency not exceeding 1,000 Hz) or 600 V DC, with some exceptions for lower voltages. These control circuit devices include manual control switches (such as pushbuttons and rotary switches), electromagnetically operated control switches (including time-delayed or instantaneous contactor relays), pilot switches (like pressure switches and thermostats), position switches operated by a machine or mechanism, and associated control circuit equipment (such as indicator lights).

It also covers specific types of switching elements associated with other devices, including auxiliary contacts of switching devices, interlocking contacts of enclosure doors, control circuit contacts of rotary switches, and control circuit contacts of overload relays. Contactor relays must also meet the requirements and tests specified in IEC 60947-4-1, except for the utilization category, which must comply with this standard.

The standard does not cover relays covered in IEC 60255 or automatic electrical control devices for household and similar purposes. The color requirements for indicator lights and pushbuttons are specified in IEC 60073 and publication 2 of the International Commission of Illumination.

The objective of this standard is to define the characteristics, electrical and mechanical requirements, and functional requirements of control circuit devices. It also addresses the tests required to verify their rated characteristics, as well as the environmental conditions, dielectric properties, and terminal requirements that these devices must meet.

Additionally, a modification has been made for the United States and Canada. In the United States, equipment operating at more than 600 V is considered high-voltage equipment, while in Canada, equipment operating at more than 750 V is considered high-voltage equipment according to the National Installation codes.