ABB Stotz S&J Monitoring Relay CM-UFD.M31

Manufacturer: ABB Stotz S&J
Designation: Monitoring Relay
Type: CM-UFD.M31
Electrical connection type: Screw connection
With removable terminals: no
1-phase undervoltage possible: yes
3-phase undervoltage possible: yes
1-phase overvoltage possible: yes
3-phase overvoltage possible: yes
1-phase window possible: yes
3-phase window possible: yes
Includes DC undervoltage function: no
Includes DC overvoltage function: no
Includes DC window function: no
Voltage measurement range 1: 0..540 V
Type of voltage measurement range: AC
Rated control supply voltage Us at AC 50 Hz: 24..240 V
Rated control supply voltage Us at AC 60 Hz: 24..240 V
Rated control supply voltage Us at DC: 24..240 V
Type of voltage for operation: AC/DC
Response value voltage: 0..540 V
Min. adjustable response delay time: 0 s
Max. permissible response delay time: 0 s
Min. adjustable reset delay time: 0 s
Max. permissible reset delay time: 0 s
Number of contacts as changeover: 3
Width: 108 mm
Height: 90 mm
Depth: 67 mm

The grid feed monitoring relay CM-UFD.M31 monitors voltage and frequency in single-phase and three-phase networks. In conjunction with inverters featuring integrated island grid detection, it meets the requirements for grid protection according to VDE-AR-N 4105:2018-11 (Generation plants connected to low-voltage networks) and VDE-AR-N 4110:2018-11 (Generation plants connected to medium-voltage networks). For use in older installations, the setting values according to VDE-AR-N 4105:2011 and BDEW (Feed-in to medium-voltage networks) are also selectable. An alarm memory stores the last 99 disconnection causes and their respective timestamps. It also monitors the connected coupling switches, vector jump detection, and ROCOF frequency gradient monitoring. EAN: 4013614492914.