XUFD – Grid and System Protection Relay (XUFD)

• XUFD (ANSI 27, 59, 81O, 81U, 81R, 78V)

The relay XUFD of the easy PROFESSIONAL LINE is a digital grid and system protection relay for decentralized generation units, such as hydroelectric power plants and photovoltaic systems.

The legal requirements for grid and system protection vary depending on the country, but in general, this protection is mandatory even for relatively small generation units (typ. 10 ... 30 kW) as soon as they feed into the public grid. (For Germany, for example, the limit is 30 kW.)

Protection Settings

The XUFD has a huge variety of ready-to-use parameter sets for many connectivity directives that exist worldwide. After selecting the directive that is valid for your country/area, the XUFD is ready to protect your system.

If the local directive allows some parameters to vary their values then these settings are done with the same ease because the XUFD continuously checks all settings for conformity with the pre-selected directive.

But of course, it is also possible to make all protection settings (under-/overvoltage, under-/overfrequency, frequency gradient/RoCoF, vector surge) freely and independent of any directives.

Available connectivity directives:

(Obsolete standards are also still available for backwards compatibility, but have been omitted from this list.)

• Germany

• VDE-AR-N 4105: 2018 (Pn ≤ 50kW)

• VDE-AR-N 4105: 2018-11 (Pn > 50kW)

• VDE-AR-N 4105: 2018-11 (Umrichter)

• VDE-AR-N 4105: 2018-11 (TR3-25)

• Austria

• OVE TOR R25 NS SYNC (ÖVE Type A/B low voltage synchr. generators)

• OVE TOR R25 NS ASYNC (ÖVE Type A/B low voltage asynchr. generators)

• OVE TOR R25 MS SYNC (ÖVE Type A/B medium voltage synchr. generators)

• OVE TOR R25 MS ASYNC (ÖVE Type A/B medium voltage asynchr. generators)

• OOE TOR R25 NS SYNC (Oberösterreich OOE Type A/B low voltage synchr. generators)

• OOE TOR R25 NS ASYNC (Oberösterreich OOE Type A/B low voltage asynchr. generators)

• OOE TOR R25 MS SYNC (Oberösterreich OOE Type A/B medium voltage synchr. generators)

• OOE TOR R25 MS ASYNC (Oberösterreich OOE Type A/B medium voltage asynchr. generators)

• W TOR R25 NS SYNC (Wien Type A/B low voltage synchr. generators)

• W TOR R25 NS ASYNC (Wien Type A/B low voltage asynchr. generators)

• W TOR R25 MS SYNC (Wien Type A/B medium voltage synchr. generators)

• W TOR R25 MS ASYNC (Wien Type A/B medium voltage asynchr. generators)

• Italy

• CEI 021: 2019

• Great Britain

• G99/1/3: 2018 LV

• G99/1/3: 2018 HV

• G98/1/2: 2018

• Belgium

• C10-11: 2019 LV-IP (Interface Protection low voltage)

• C10-11: 2019 LV-ASS (Automatic Separation System / Low Voltage)

• C10-11: 2019 HV-IP (Interface Protection / High Voltage)

• C10-11: 2019 HV-ASS (Automatic Separation System / High Voltage)

• Switzerland

• NA/EEA CH 2014 NS Typ A <1MW (Low Voltage Type A up to 1 MW)

• NA/EEA NE7 CH 2020 NS Typ A (Low Voltage Type A > 800 W to ≤ 250 kW)

• NA/EEA NE7 CH 2020 NS Typ B (Low Voltage Type A > 250 kW)

• Europe

• EN 50438: 2013

• Denmark

• EN 50438: 2013 DK

• France

• VDE 0126-1-1: 2013 (ERDF‑NOI‑RES_13E)

• Turkiye, Norway

• VDE 0126-1-1: 2013

• South Africa

• NRS 097-2-1: 2017

• Australia, New Zealand

• AS/NZS 4777.2: 2015

Auxiliary Voltage

Voltage supply via wide-range power supply unit: