Tyskland – VDE-AR-N 4105 (lavspænding)

Dette afsnit beskriver de landespecifikke parameterindstillinger for ABB CM-UFD.M31 og CM-UFD.M31M-netovervågningsrelæer som påkrævet for at overholde kravene til den tyske VDE-AR-N 4105-standard for nettilslutninger med lavspænding.

Disse indstillinger sikrer korrekt integration af distribuerede energiressourcer i det offentlige net ved at overholde de nationale grænser for spænding, frekvens og afbrydelsesadfærd, som defineret for systemer, der er tilsluttet lavspændingsdistributionsnetværket.

Tyskland VDE-AR-N 4105-indstillinger for ABB CM-UFD.M31(M)
Menu	Undermenu		Konfigurationsmulighed
Monitoring functions	Overvoltage >UAV	Monitoring	enabled
Monitoring functions	Overvoltage >UAV	Threshold value	1.1 x U_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	1 s
Monitoring functions	Undervoltage <U2	Monitoring	enabled
Monitoring functions	Undervoltage <U2	Threshold value	0.45 x U_n
Monitoring functions	Undervoltage <U2	Hysteresis	1 %
Monitoring functions	Undervoltage <U2	Tripping delay	0.3 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	0.1 s
Monitoring functions	Overfrequency >F2	Monitoring	disabled
Monitoring functions	Overfrequency >F2	Threshold value	0.01 Hz
Monitoring functions	Overfrequency >F2	Hysteresis	0.01 Hz
Monitoring functions	Overfrequency >F2	Tripping delay	0.01 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 Forkortelse for "Rate of Change of Frequency". I netovervågningsrelæer henviser det til, hvor hurtigt den elektriske frekvens ændrer sig over tid. Det anvendes til at registrere ustabile forhold i elnettet – især under hændelser som lastfrakobling eller frakobling af generatorer – og kan udløse beskyttelsesforanstaltninger, hvis frekvensen ændrer sig for hurtigt.	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	60 s
Switch-on conditions	Switch-on delay	Short interruption	enabled
Switch-on conditions	Voltage window	Monitoring	enabled
Switch-on conditions	Voltage window	Minimum	0.85 x U_n
Switch-on conditions	Voltage window	Maximum	1.1 x U_n
Switch-on conditions	Frequency window	Monitoring	enabled
Switch-on conditions	Frequency window	Minimum	47.5
Switch-on conditions	Frequency window	Maximum	50.1