Schalk Network Monitoring Relay NKR 5

Manufacturer: Schalk
Designation: Network Monitoring Relay
Type: NKR 5
Electrical connection type: Screw connection
With removable terminals: no
1-phase undervoltage possible: yes
3-phase undervoltage possible: yes
1-phase overvoltage possible: no
3-phase overvoltage possible: no
1-phase window possible: no
3-phase window possible: no
Includes DC undervoltage function: no
Includes DC overvoltage function: no
Includes DC window function: no
Voltage measurement range 1: 150 to 230 V
Voltage measurement range 2: 196 V
Type of voltage in measurement range: AC
Rated control supply voltage Us at AC 50 Hz: 140 to 250 V
Rated control supply voltage Us at AC 60 Hz: 140 to 250 V
Type of voltage for actuation: AC
Response value voltage: 150 to 230 V
Min. adjustable response delay time: 0.5 s
Max. permissible response delay time: 0.5 s
Min. adjustable fallback delay time: 0 s
Max. permissible fallback 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 to monitor single-phase 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 indicates the state of the phase voltages and the direction of rotation via 4 LEDs. A phase failure is visually indicated by a blinking LED. The relay either automatically switches back on after voltage recovery 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.