Mains monitoring relay NKR 5

Mains monitoring relay NKR 5 – Schalk – nkr509 – 4046929301046: Network monitoring relay NKR 5 Design of the electrical connection Screw connection, 1-phase undervoltage possible, 3-phase undervoltage possible, voltage measuring range 1 150 ... 230V, voltage measuring range 2 196 ... 196V, voltage type of the measuring range AC, rated control supply voltage Us at AC 50 Hz 140 ... 250V, rated control supply voltage Us at AC 60 Hz 140 ... 250V, type of voltage for actuation AC, response value voltage 150 ... 230V, min. adjustable response delay time 0.5s, max. permissible response delay time 0.5s , Min. adjustable off-delay time 0s, Max. permissible off-delay time 0.5s, Number of contacts as NC contacts 0, Number of contacts as NO contacts 0, Number of contacts as changeover contacts 1, width 18mm, height 88mm, depth 55mm, the mains monitoring relays are used for monitoring of one- to three-phase networks. When used in a three-phase network, the phase angle can be monitored in addition to the voltage. The switching threshold can be freely set from 150 to 230V or to a defined fixed value of 196V (DIN VDE). With the NKR 5, the status of the phase voltages and the rotating field direction are displayed via 4 LEDs. A phase failure is optically saved by a flashing LED. The relay either switches on automatically after the voltage returns, or only after acknowledgment by the internal or an external button (error memory function), dimensions: 18x55mm, 230V AC, 1 changeover contact 10A potential-free, Uvar 150-230V, Ufix 196V