Schalk Network Monitoring Relay NKR 5

Manufacturer: Schalk
Designation: Network Monitoring Relay
Type: NKR 5
Connection type: Screw terminal
Removable terminals: no
Single-phase undervoltage possible: yes
Three-phase undervoltage possible: yes
Single-phase overvoltage possible: no
Three-phase overvoltage possible: no
Single-phase window possible: no
Three-phase window possible: no
Includes DC undervoltage function: no
Includes DC overvoltage function: no
Includes DC window function: no
Voltage measurement range 1: 150..230 V
Voltage measurement range 2: 196 V
Type of voltage measurement range: AC
Rated control supply voltage Us at AC 50 Hz: 140..250 V
Rated control supply voltage Us at AC 60 Hz: 140..250 V
Type of voltage for operation: AC
Response value voltage: 150..230 V
Min. adjustable response delay time: 0.5 s
Max. permissible response delay time: 0.5 s
Min. adjustable reset delay time: 0 s
Max. permissible reset delay time: 0.5 s
Number of contacts as changeover: 1
Width: 18 mm
Height: 88 mm
Depth: 55 mm

The network monitoring relays are used for monitoring single to three-phase networks. When used in a three-phase network, the phase position can also be monitored in addition to the voltage. The switching threshold can be freely set from 150 to 230 V or to a defined fixed value of 196 V (DIN VDE). The NKR 5 displays the status of the phase voltages and the direction of rotation via 4 LEDs. A phase failure is visually indicated by a blinking LED. The relay can either switch automatically after voltage restoration or only after acknowledgment by the internal or an external button (fault memory function). Dimensions: 18 x 55 mm, 230 V AC, 1 changeover contact 10 A potential-free, Uvar 150-230 V, Ufix 196 V, EAN: 4046929301046.