UL 60947
Hi everyone,
The UL 60947 standard is the American market adaptation of the IEC 60947, encompassing a series of specifications for low-voltage switchgear and controlgear. Each section of this standard defines specific safety and performance criteria for different types of devices. Here are the subcategories of the UL 60947 series and a brief description for each:
UL 60947-1: General Rules - Defines the basic safety and performance requirements for all low-voltage switchgear and controlgear.
UL 60947-2: Circuit Breakers - Contains specifications for circuit breakers used to protect electrical circuits.
UL 60947-3: Switches and Disconnectors - Sets standards for switches, disconnectors, and similar devices used in electrical circuits.
UL 60947-4-1: Contactors and Motor Starters - Includes safety criteria for contactors and motor starters used to control electric motors.
UL 60947-4-2: Protective Motor Starters - Defines standards for devices that protect motors from overload and electrical faults.
UL 60947-4-3: AC Semiconductor Motor Controllers and Starters - Contains requirements for semiconductor-based devices used to control AC motors.
UL 60947-5-1: Control Circuit Devices and Switching Elements - Covers safety standards for buttons, switches, and other switching elements used in control circuits.
UL 60947-5-2: Proximity Switches - Specifies technical and safety requirements for proximity switches used to detect the presence of objects.
UL 60947-5-3: Illuminated Actuators - Defines specifications for illuminated actuators used in control panels.
UL 60947-5-4: Position Switches - Includes safety and performance requirements for position switches used to detect mechanical position or movement.
UL 60947-5-5: Sensors Used in Control Circuits - Specifications for sensors used to detect physical variables like temperature and pressure.
UL 60947-5-6: DC Control Systems - Safety and performance standards for devices used in DC control systems.
UL 60947-5-7: Emergency Stop Devices - Standards for emergency stop devices used in emergency situations, ensuring these devices respond quickly and safely.
UL 60947-6-1: Transfer Switching Equipment - Safety and performance requirements for devices that enable automatic or manual switching between power sources.
UL 60947-6-2: Power Distribution and Motor Control Centres - Specifications for systems used in power distribution and motor control operations.
UL 60947-7-1: Terminal Blocks - Design and safety requirements for terminal blocks used in electrical connections.
UL 60947-7-2: PCB Connection Devices - Safety and quality standards for connection devices used on printed circuit boards.
UL 60947-7-3: Connection Devices - General and specific requirements for various connection devices used in electrical circuits.
UL 60947-8: Semiconductor Devices for Load Control - Specifications for semiconductor-based devices used to control electrical loads.
The UL 60947 series provides comprehensive and detailed standards for the design and use of a wide range of low-voltage switchgear and controlgear. Each section offers specific requirements and safety recommendations for a particular type of device or application area, ensuring safe and effective use in the American market.