Residual current monitors (RCMs) perform a wide range of functions for protecting people and machine, they enable the detection of system malfunctions and facilatate troubleshooting before the protective device is switched off, which increases plant and operating safety, and cuts costs. These residual current monitors control an electrical installation for the presence of an unbalanced residual current and indicate when it exceeds a predetermined level. They can optionally be used for alarming and triggering switching devices.
