Parameter Description
Lower voltage threshold
(V) for grid connection
According to the standards of certain countries and regions, initial grid
connection is not allowed when the grid voltage is below the
minimum voltage for grid connection.
Upper frequency
threshold (Hz) for grid
connection
According to the standards of certain countries and regions, initial grid
connection is not allowed when the grid frequency is higher than the
maximum frequency for grid connection.
Lower frequency
threshold (Hz) for grid
connection
According to the standards of certain countries and regions, initial grid
connection is not allowed when the grid frequency is below the
minimum frequency for grid connection.
Grid reconnection
voltage upper limit (V)
According to the standards of certain countries and regions, grid
reconnection is not allowed when the grid voltage is higher than the
maximum voltage for grid reconnection.
Grid reconnection
voltage lower limit (V)
According to the standards of certain countries and regions, grid
reconnection is not allowed when the grid voltage is below the
minimum grid voltage for grid reconnection.
Grid reconnection
frequency upper limit
(Hz)
According to the standards of certain countries and regions, grid
reconnection is not allowed when the grid frequency is higher than
the maximum grid frequency for grid reconnection.
Grid reconnection
frequency lower limit
(Hz)
According to the standards of certain countries and regions, grid
reconnection is not allowed when the grid frequency is below the
minimum grid frequency for grid reconnection.
Grid automatic
reconnection time
Species the time after which the device begins restarting after the
power grid recovers.
Protection Parameters
Parameter
Description
Insulation resistance protection
threshold (MΩ)
To ensure device safety, the device detects the insulation
resistance of the DC side to the ground when it starts a self-
check. If the detected value is less than the preset value, the
device does not connect to the grid nor start.
Active islanding protection Species whether to enable the active islanding protection
function.
Passive islanding protection Species whether to enable the passive islanding protection
function.
Unbalance voltage protection
(%)
Species the device protection threshold when the power grid
voltage is unbalanced.
Phase protection threshold (°) The Japanese standard requires that during passive islanding
detection, the protection should be triggered if an abrupt
voltage phase change is detected.
SmartLogger3000
User Manual 6 WebUI Operations
Issue 10 (2022-08-20) Copyright © Huawei Technologies Co., Ltd. 146
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