No. Parameter Description
6 Grid reconnection
voltage upper limit (V)
The standards of certain countries and regions require that after
the inverter shuts down for protection due to a fault, if the
power grid voltage is higher than Grid reconnection voltage
upper limit, the inverter is not allowed to reconnect to the grid.
7 Grid reconnection
voltage lower limit (V)
The standards of certain countries and regions require that after
the inverter shuts down for protection due to a fault, if the
power grid voltage is lower than Grid reconnection voltage
lower limit, the inverter is not allowed to reconnect to the grid.
8 Grid reconnection
frequency upper limit
(Hz)
The standards of certain countries and regions require that after
the inverter shuts down for protection due to a fault, if the
power grid frequency is higher than Grid reconnection
frequency upper limit, the inverter is not allowed to reconnect
to the grid.
9 Grid reconnection
frequency lower limit
(Hz)
The standards of certain countries and regions require that after
the inverter shuts down for protection due to a fault, if the
power grid frequency is lower than Grid reconnection
frequency lower limit, the inverter is not allowed to reconnect
to the grid.
7.1.4.2 Setting Protection Parameters
Choose Settings > Protection parameters to set protection parameters.
No.
Parameter Description
1 Unbalance voltage
protection threshold
(%)
Species the inverter protection threshold when the power grid
voltage is unbalanced.
2 Insulation resistance
protection threshold
(MΩ)
To ensure device safety, the inverter detects the insulation
resistance of the input side with respect to ground when it
starts a self-check. If the detected value is less than the preset
value, the inverter does not connect to the grid.
4 Phase angle oset
protection
The standards of certain countries and regions require that the
inverter needs to be protected when the phase angle oset of
the power grid three phases exceeds a certain value.
5 Voltage threshold for
10-minute overvoltage
protection (V)
Species the 10-minute overvoltage protection threshold.
6 Duration threshold for
10-minute overvoltage
protection (ms)
Species the 10-minute overvoltage protection duration.
SUN2000-(100KTL, 110KTL, 115KTL)-M2
User Manual 7 Man-Machine Interactions
Issue 07 (2023-04-30) Copyright © Huawei Technologies Co., Ltd. 86
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