Germany VDE-AR-N 4110 (Medium Voltage)

This section describes the parameter configuration for the ABB CM-UFD.M31 and CM-UFD.M31M relays to comply with the VDE-AR-N 4110 standard in Germany.

This standard governs grid connection requirements for systems connected to the medium-voltage network and defines precise thresholds for voltage, frequency, and fault detection to ensure system stability and safety within the public grid infrastructure.

Germany VDE-AR-N 4110 settings for ABB CM-UFD.M31(M)
Menu	Submenu		Configuration option
Monitoring functions	Overvoltage >UAV	Monitoring	disabled
Monitoring functions	Overvoltage >UAV	Threshold value	0.005 xU_n
Monitoring functions	Overvoltage >UAV	Hysteresis	0.1 %
Monitoring functions	Overvoltage >U1	Monitoring	enabled
Monitoring functions	Overvoltage >U1	Threshold value	1.25 x U_n
Monitoring functions	Overvoltage >U1	Hysteresis	1 %
Monitoring functions	Overvoltage >U1	Tripping delay	0.1 s
Monitoring functions	Overvoltage >U2	Monitoring	disabled
Monitoring functions	Overvoltage >U2	Threshold value	0.005 x U_n
Monitoring functions	Overvoltage >U2	Hysteresis	0.1 %
Monitoring functions	Overvoltage >U2	Tripping delay	0.01 s
Monitoring functions	Undervoltage <U1	Monitoring	enabled
Monitoring functions	Undervoltage <U1	Threshold value	0.8 x U_n
Monitoring functions	Undervoltage <U1	Hysteresis	1 %
Monitoring functions	Undervoltage <U1	Tripping delay	2.4 s
Monitoring functions	Undervoltage <U2	Monitoring	enabled
Monitoring functions	Undervoltage <U2	Threshold value	0.3 x U_n
Monitoring functions	Undervoltage <U2	Hysteresis	1 %
Monitoring functions	Undervoltage <U2	Tripping delay	0.8 s
Monitoring functions	Overfrequency >F1	Monitoring	enabled
Monitoring functions	Overfrequency >F1	Threshold value	51.5 Hz
Monitoring functions	Overfrequency >F1	Hysteresis	0.1 Hz
Monitoring functions	Overfrequency >F1	Tripping delay	5 s
Monitoring functions	Overfrequency >F2	Monitoring	enabled
Monitoring functions	Overfrequency >F2	Threshold value	52.5 Hz
Monitoring functions	Overfrequency >F2	Hysteresis	0.1 Hz
Monitoring functions	Overfrequency >F2	Tripping delay	0.1 s
Monitoring functions	Underfrequency <F1	Monitoring	enabled
Monitoring functions	Underfrequency <F1	Threshold value	47.5 Hz
Monitoring functions	Underfrequency <F1	Hysteresis	0.1 Hz
Monitoring functions	Underfrequency <F1	Tripping delay	0.1 s
Monitoring functions	Underfrequency <F2	Monitoring	disabled
Monitoring functions	Underfrequency <F2	Threshold value	0.01 Hz
Monitoring functions	Underfrequency <F2	Hysteresis	0.01 Hz
Monitoring functions	Underfrequency <F2	Tripping delay	0.01 s
Monitoring functions	ROCOF Short for "Rate of Change of Frequency". In grid monitoring relays, it refers to how quickly the electrical frequency is changing over time. It's used to detect unstable grid conditions - especially during events like load shedding or generator disconnection - and can trigger protective actions if the frequency changes too rapidly.	Monitoring	disabled
Monitoring functions	ROCOF	Threshold value	0.005 Hz/s
Monitoring functions	ROCOF	Number of cycles	1
Monitoring functions	ROCOF	Tripping delay	0.01 s
Monitoring functions	ROCOF	Error time	0.01 s
Monitoring functions	Vector Shift VS	Monitoring	disabled
Monitoring functions	Vector Shift VS	Threshold value	0.1*
Monitoring functions	Vector Shift VS	Error time	0.01 s
Switch-on conditions	Switch-on delay	Switch-on delay	600 s
Switch-on conditions	Switch-on delay	Short interruption	enabled
Switch-on conditions	Voltage window	Monitoring	enabled
Switch-on conditions	Voltage window	Minimum	49.9 Hz
Switch-on conditions	Voltage window	Maximum	50.1 Hz
Switch-on conditions	Frequency window	Monitoring	enabled
Switch-on conditions	Frequency window	Minimum	49.8
Switch-on conditions	Frequency window	Maximum	50.2