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EATON
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Protection characteristics
Under voltage protection
The intelligent controller measures the RMS value of the primary
circuit voltage. When the three line voltages are all less than
the set point, that is, when the maximum value of the three line
voltages is less than the under voltage protection threshold, the
undervoltage protection will act; when the maximum value of the
three line voltages are greater than the return value, the alarm
action will return.
Action characteristics: When the maximum voltage is less than
the action threshold (1), the alarm or trip delay will be activated;
At the end of the action delay time (2), an alarm or trip signal will
be issued, and the under voltage fault protection will act; When
the maximum voltage is greater than the return threshold (3), the
return delay will be activated; At the end of the return delay time
(4), the alarm will be removed and the under voltage fault protec-
tion will return.
Action threshold (V)
100 ~ return threshold (Step is 1)
Action delay time (s)
0.2 ~ 60 (Step is 0.1)
Return threshold (V)
Action threshold ~ 1200 (Step is 1)
This set point is only available when the execution
mode is "Alarm", and the return value must be greater
than or equal to the start value.
Return delay time (s)
0.2 ~ 60 (Step is 0.1)
Action or alarm characteristics
(Delay tolerance ±10%)
Umax / action threshold <0.9
Fixed time action or alarm
Umax / action threshold
1.1
No action or alarm
Under-voltage alarm return
characteristic (Delay tolerance
±10%)
Umax / action threshold >1.1
Return
Umax / action threshold
0.9
No return
Alarm contact output
When the execution mode is alarm, the "under voltage alarm" contact output can be added
Over voltage Protection
The intelligent controller measures the RMS value of the primary
circuit voltage. When the three line voltages are all greater than
the set value, that is, when the minimum value of the three line
voltages is greater than the over voltage protection threshold, the
over voltage protection will act; when the three line voltages are
less than the return value, the alarm action will return.
Action characteristics: When the minimum voltage is greater than
the action threshold (1), the alarm or trip delay will be activated;
At the end of the action delay time (2), an alarm or trip signal will
be issued, and the over voltage fault protection will act; When the
execution mode is set as alarm, after the alarm action, the return
delay will be activated when the minimum voltage is less than the
return threshold (3); At the end of the return delay time (4), the
alarm will be removed and the over voltage fault protection will
return.
Action threshold (V)
Return threshold~1200 (Step is 1)
Action delay time (s)
0.2~60 (Step is 0.1)
Return threshold (V)
100~Action threshold (Step is 1)
This set point is only available when the execution
mode is "Alarm", and the return value must be greater
than or equal to the start value.
Return delay time (s)
0.2~60 (Step is 0.1)
Action or alarm characteristics
(Delay tolerance ±10%)
Umin/action threshold
≥
1.1
Fixed time action or alarm
Umin/action threshold<0.9
No action or alarm
Over voltage alarm return
characteristic (Delay tolerance
±10%)
Umax/action threshold
≤
0.9
Return
Umax/action threshold>1.1
No return
Alarm contact output
When the execution mode is alarm, the "over voltage alarm" contact output can be added
Under voltage protection acting principle
1. Action threshold
2. Action delay time
3. Return threshold
4. Return delay time
Over voltage protection acting principle
1. Action threshold
2. Action delay time
3. Return threshold
4. Return delay time
Instruction Leafl et
Effective September 2022
IZM6 Series Air Circuit Breaker
Operating Instruction Leafl et
