System-disconnection relay EU400 NA-protection
13
Subject to technical changes
Application and brief description
The grid- and plant protection device EU400 monitors voltage and frequency in three-phase networks . It
complies with the requirements of VDE-AR-N 4105:2018-11 or VSE NA/EEA-NE7 - CH 2020, in stand-alone
power generation plants for feeding into the low-voltage grid. For VDE-AR-N 4105:2018-11, the
corresponding parameters were stored in program 2 or for VSE NA/EEA-NE7 - CH 2020, in program 15, and
the monitoring of the coupling switch and the protection of the parameters were adapted accordingly
For supply to the medium-voltage network in accordance with VDE-AR-N 4110:2018-11 or in the high-voltage
network in accordance with VDE-AR-N 4120:2018-11, it is suitable as unit protection on generators and NA
intermediate protection, if no Q-U protection is required, a higher NA protection.
The device has a two-channel error-proof design and thus meets the requirements of VDE-AR-N 4105:2018-
11 and ASE RR/IPE-NR 7 - CH 2020. The function of the connected switch is monitored. If monitoring is
activated, the device does not restart if a shutdown fault is detected; if switch-on errors are detected, an
attempt is made to restart the system, which increases the availability of the system. Limit values for different
applications are predefined. They can be changed if required and be protected with a code and/or a seal.
With a test-button the function of the connected switches can be tested and their switching-time can be
measured. The standby input allows a remote shutoff e.g. with a RCR.
Summary of the functions
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Under and overvoltage monitoring 15…520 V
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Measuring phase-neutral or phase-phase
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Monitoring of under-
and overfrequency 45…65 Hz
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Monitoring of quality of voltage (10-minutes-average)
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Monitoring of
vector shift 2…65°
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Monitoring of rate of change of frequency (ROCOF, df/dt) 0,100...5,000 Hz/s
•
Monitoring of zero voltage U
0
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One-fault-proof with monitoring of connected switches (defeatable when using the integrated switch of
pv and battery inverter acc. to DIN EN 62109 (VDE 0126-4))
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2 automatic restarts at switch-on error
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Passive anti-islanding protection acc. to ch. 6.5.3 and app. D2
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Switching delay adjustable 0.05 … 300 s
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Switching back
delay adjustable 0 … 6.000 s
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Switching back delay at alarms <3 s: 5 s
Preset values acc. to
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VDE-AR-N 4105:2018-11 (Pr2), VDE-AR-N 4105_2011-08 (Pr1)
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VDE-AR-N 4110 + 4120:2018-11 (PR11-14) and BDEW (Pr 3-6)
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G59/3 and G83/2 for Great Britain
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ÖVE standard for Austria
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VSE NA/EEA-NE7 - CH 2020 for Switzerland
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Alarm counter for 100 alarms (trip value, cause and rel. time stamp)
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Record of added times of alarms
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Input for standby with counter and recording of time
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Test button and simulation with measuring of switching-times
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Sealing, all values can be read-out when sealed
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Easy installation and programming with pre-set programs
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Housing for DIN-rail-mount, 105 mm wide, mounting height 66 mm
