normal condition

◆ Surrounding air temperature
The upper limit of the ambient air temperature is+40 ℃;
The lower limit of the ambient air temperature is -5 ℃;
The average temperature of the surrounding air within 24 hours shall not exceed+35 ℃.
◆ Altitude: The altitude of the installation site shall not exceed 2000m.
◆ Atmospheric conditions:
The relative humidity of the atmosphere shall not exceed 50% when the surrounding air temperature is+40 ℃; At lower temperatures, there can be higher relative humidity; The average maximum relative humidity in the wettest month is 90%,
At the same time, the monthly average minimum temperature for the month is+25 ℃, taking into account the condensation that occurs on the surface of the product due to temperature changes.
Pollution level: The pollution level is level 3.

Main technical parameters
Rated value of circuit breaker

Model: FSM1-63L/125L/250L/400L/630L/800L/1250L
FSM1-63H/125H/250H/400H/630H/800H/1250H
Rated current of shell frame level (A): 63~1250
Rated current (A): 10~1250
Rated working voltage Ue (V): 400
Rated insulation voltage Ui (V): 800
Rated ultimate short-circuit breaking capacity (kA) 400V: 25 *~100
Rated operating short-circuit breaking capacity (kA) 400V: 18 *~100
Maintainable mechanical life (times): 5000/10000/20000
Electrical lifespan AC400V (times): 800/2000/3000
Number of poles: 2/3/4
Distance between flying 5 melons (mm): ≤ 50/≤ 100
Inverse time limit breaking action characteristics of overcurrent release for distribution circuit breakers when all poles are simultaneously energized
Test current name: Agreed non tripping current: 1.05I/in
Agreed time: 2h (In>63A), 1h (ln ≤ 63A)
Starting state: cold state
Test current name: Agreed tripping current: 1.30I/in
Agreed time: 2 hours (ln>63A), h (ln ≤ 63A)
Starting state: Immediately after Experiment One
Inverse time limit breaking action characteristics of circuit breakers for motor protection when all poles of overcurrent release are simultaneously energized
1.0I/in - agreed time>2h - starting state - cold state
1.2I/in - agreed time ≤ 2h - starting state - starting immediately after test one
1.5I/in - agreed time ≤ 2min - starting state - hot state - note: In ≤ 25
≤ 8min - Starting state - Hot state - Remarks: 25A<In ≤ 800A
7.2I/in - Agreed time 0.5s ≤ T ≤ 5S - Starting state - Cold state - Remarks: In ≤ 25A
6s ≤ T ≤ 20s - Starting state - Cold state - Remarks: 25A<In ≤ 800A

Internal and external accessories of circuit breakers

Internal accessories of circuit breakers
◇ Undervoltage release
When the voltage drops (even slowly) to within the range of 70% and 35% of the rated voltage, the undervoltage release should act; Undervoltage release when the power supply voltage is lower than the release voltage
At 35%, the undervoltage release should be able to prevent the circuit breaker from closing; When the power supply voltage is equal to or greater than 85%, it should be possible to ensure that the circuit breaker is closed.
Special reminder: Circuit breakers equipped with undervoltage releases can only open and close normally when the undervoltage is at the rated voltage.

Rated voltage and frequency of undervoltage release

A2 voltage specification: AC230V
A2 rated frequency: 50Hz
A4 voltage specification: AC400V
A4 rated frequency: 50Hz
◇ Shunt release device
The circuit breaker can reliably disconnect at a rated voltage of 70%~110%

Rated voltage and frequency of shunt release

A2 voltage specification: AC230V
A2 rated frequency: 50Hz
A4 voltage specification: AC400V
A4 rated frequency: 50Hz
D3 voltage specification: DC24V
Note: When selecting DC24V voltage specification, the rated current reaches 5A ± 0.5.