25
value
Action delay
0~9999
Alarm delay value, in seconds
Reset threshold
-9999~9999
Alarm recovery value, unit and decimal point
position are consistent with the meter display
value
Reset delay
0~9999
Alarm recovery delay value, accurate to the
second
Zero alarm switch
Open close
Zero alarm enable, valid when low alarm
Alarm description:
The meter has two groups of alarms. Each group of alarms can detect a variety of alarm conditions, including
changes in the inputs of the electronic parameters, phase loss, reverse phase sequence, unbalance, and harmonics. The
switch input and reverse phase sequence only need to set the enable bit, and other alarms need to set the alarm
condition.
Alarm Type Description
：
1.Electric parameter alarm
Overcurrent: Zero alarm setting does not apply to overcurrent alarm. When the single phase current is greater
than or equal to the action value and meets the set action delay time, the single phase overcurrent alarm starts; when
the single phase current is lower than the set recovered value and meets the delay time. The single phase overcurrent
alarm is released.
Undercurrent: When the single phase current is lower than or equal to the action value and meets the set action
delay time, the single phase undercurrent alarm starts; when the single phase current is greater than the recovered
value and meets the delay time, the single phase undercurrent alarm is released.
Note: When undercurrent alarm and zero alarm is enabled, single phase current is equal to 0, the alarm is valid; when
undercurrent is enabled and zero alarm is forbidden, when single phase current is equal to 0, the alarm is invalid.
2.Phase current loss alarm
When any current (not all current) is equal to or lower than the action value and meets the delay time, phase A
current loss alarm occurs; and when any of the following conditions occurs, the alarm is released:
The three-phase current is greater than the recovered value and meets the delay time
The three-phase current is lower than the phase loss action value.
3.Reverse phase sequence alarm
：
The values of action and recovery and delay time are not applicable to the
reverse phase sequence alarm. When the phase sequence is not ABC normal phase sequence, an inverse phase
sequence alarm is generated.
4.DI alarm
：
When the DI state changes from the initial state, an alarm is generated.
The following is a schematic diagram of how the instrument handles alarm parameters.
Alarm value
Recovery value
Action Delay
Alarm interval
Recovery delay
