Standards for electrical safety

The standard EN 60947-5-1 applies for control circuit devices and switching elements, signalling, interlock etc. on relays and switchgear. It applies for control circuit devices with a rated voltage of up to 1000 VAC (up to 1000 Hz) or 600 VDC.

The standard covers specific types of control circuit devies, such as:

• Manually operated auxiliary current switches, e.g. pushbuttons, rotary switches, foot switches;
• Electromagnetically operated auxiliary current switches, delayed or instantaneous, e.g. auxiliary contactors;
• Automatically operated auxiliary current switches such as limiters, controllers, monitors, e.g. pressure-controlled auxiliary current switches;
• Temperature-dependent auxiliary current switches (thermostats), program switches;
• Position switches, e.g. auxiliary current switches operated via a machine part or mechanism;
• Devices assigned within the control circuit, e.g. lamps.

This standard EN 60947-5-5 provides detailed information on the electrical and mechanical design of emergency stop devices with mechanical latching function and on their testing. It applies to electrical control equipment and switching elements used to generate an emergency stop command. Such equipment may be installed either in its own housing or in accordance with the manufacturer’s specifications.

Selection of the correct control/signal device is a key factor for the safety of man and machine. Rely on a safe solution with Pilz E-STOP pushbuttons, muting lamps and manually operated control devices. [... more]