Smart Reclosed Breaker


MT84SR series self-restoring over-voltage and under-voltage protection miniature circuit breakers can distinguish between manual switch-off and over-current tripping, and provide different solutions for this two different condition; over-voltage protection and under-voltage protection can be provided when the grid voltage is too low, at the same time, it can protect the line from overload and short

Rp4,680,000

MT84SR series self-restoring over-voltage and under-voltage protection miniature circuit breakers can distinguish between manual switch-off and over-current tripping, and provide different solutions for this two different condition; over-voltage protection and under-voltage protection can be provided when the grid voltage is too low, at the same time, it can protect the line from overload and short

Technical Data
Poles 1P ,2P, 3P, 4P
Rated voltage Single phase 230V~ /Three phase 400V~
Frequency 50/60Hz
Time delay of
reset current fault 1st: 5s; 2nd: 20s; 3rd: 60s; 4th: lock
Work temperature -25℃~+55℃
Storage temperature -40℃~+70℃
Relative humidity ≤95%
Installation 35mm DIN Rail Mounting
Mechanical life ≥10000 trips
Action time Open≤0.2s Close≤0.3s (Exclude time delay)

Auto Reset Over/Under Voltage Protector
Item Voltage time Description
O/V1 ≥275V 5S O/V1 is activated when voltage ≥275V,and
Device trip when O/V conyinues ≥5S
O/V2 ≥300V 1.5S O/V2 is activated when voltage≥300V, and
device trip when O/V continues ≥ 1.5s
O/V3 ≥350V 0.3S O/V3 is activated when voltage≥350V, and
device trip when O/V continues ≥ 0.3s
O/V4 ≥400V 0.1S O/V4 is activated when voltage≥400V, and
device trip when O/V continues ≥ 0.1s
U/V1 ≤160V 3S U/V1 is activated when voltage≤160V, and
device trip when U/V continues ≥ 3s
Auto Reset Current Fault
The device reclosed after current fault, the equipment keeps
closed for more than 15 minutes, which is defined as a successful
Definition of closing. After the closing is successful, the set reclose times of the
Success reset equipment will automatically be cleared. When such current fault
trip occurs again, the device will delay 5 seconds to auto reclose.
Mode of current fault auto reclose: the device is connected to the
power supply when the red light is on. 1) The device will first auto
reclose, if device in open state, with a time delay of 5s; 2)The
Process of device will second auto reclose, if failed to recloe in first time, with
Current fault a time delay of 20s; 3)The device will third auto reclose, if failed to
auto reset recloe in second time as well, with a time delay of 60s; 4)The device
will be in current fault lock state, with red/green flashing, if also
failed to reclose the third time, and stops auto reclose again.
Remove After checking the fault manually, pull out and push in the lock back
Current to the device, and manually close the handle once and such current
fault lock fault lock will be removed

SKU: MT84SR Category: Tag:
Weight 1 kg

Technical Data
Poles 1P ,2P, 3P, 4P
Rated voltage Single phase 230V~ /Three phase 400V~
Frequency 50/60Hz
Time delay of
reset current fault 1st: 5s; 2nd: 20s; 3rd: 60s; 4th: lock
Work temperature -25℃~+55℃
Storage temperature -40℃~+70℃
Relative humidity ≤95%
Installation 35mm DIN Rail Mounting
Mechanical life ≥10000 trips
Action time Open≤0.2s Close≤0.3s (Exclude time delay)

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