Installation relay with manual operation, suitable for switching single-phase or three-phase consumers up to 20A. Due to its universal applications in building technology and home installation, the following applications and controls can be realized: switching of lighting systems and electric heating, switching of ventilation and air conditioning systems, fans, switching of heat pumps, switching of electrically controlled roller shutters and blinds, switching of incandescent lamps and gas discharge lamps. The series of installation relays Z-R meets the requirements of EN/IEC 60947 and EN/IEC 1095. Manual operation for testing purposes, switching contacts with safe isolation AC1 according to EN 60947-4-1 (Z-R, Z-RK), option for optical indication of operating status via LED, front-side switching position indication through manual operation button, all terminals - coil and contacts - with terminal aid. No "backstabbing" of connection wires possible, main contacts with standard pin assignment movable, use of flame-retardant materials as well as chlorine- and halogen-free plastics, touch safety according to VBG4. Advantages: optionally three versions (Z-R, Z-RK, Z-RE), low switching noise and hum-free, easy connection due to generously sized terminals delivered in the open state, simple snap-on mounting for 35mm DIN rail, high flexibility through various contact configurations, easy access for connecting the coil supply.