ME terminals (test separation terminal blocks). A new generation of test separation terminal blocks with screw, spring cage, or plug-in connections that allow for immediate circuit separation or the connection of test devices, current transformers, or other components in the circuit. All switching states are easily recognizable at a glance. Additionally, a comprehensive and flexible accessory program is available. Through terminals and PE terminal blocks with a uniform design. Flexibly applicable bridges, test, and switching accessories. Shaft with 6 functions. Elongated insulation switch establishes contact and securely locks into the respective switching status. Safe short-circuiting is easy with conventional plug-in bridges or conveniently with switching strips. Suitable marking cards.