Scope of application 

SMGM1 series of plastic shell circuit breakers (hereinafter referred to as circuit breakers) rated insulation voltage of 800V (SMGM1-63 to 500V) for AC 50Hz, rated voltage 690V and below (SMGM1-63 to 400V) Rated operating current to 800A Circuit for frequent conversion and the motor is not frequent starting (SMGM1-800 without motor protection type) purposes. Circuit breakers with overload short-circuit and under-voltage protection function to protect lines and power equipment from damage.

Circuit breakers can be mounted vertically (ie, vertical) can also be installed horizontally (ie, cross-loaded).

Circuit breakers with isolation function The corresponding symbols are:

The following standards apply to circuit breaker products:

General principles of IEC 60947-1 and GB14048.1

IEC60947-2 and GB14048.2 low-voltage circuit breakers

IEC60947-4-1 and GB14048.4 electromechanical contactors and motor starters

IEC60947-5-1 and GB14048.5 electromechanical control circuit appliances

 

 

Normal use and installation conditions

○ Normal use conditions:

A) the ambient air temperature does not exceed the upper limit of +400 C; lower limit of not less than-50C; 24h within the average of not more than +350 C:

Note: Circuit-breakers used at ambient air temperatures above +400 ° C or below -5 ° should be consulted with the manufacturer.

B) the altitude of the installation site does not exceed 2000m;

C) The relative humidity of the atmosphere does not exceed 50% at a maximum ambient temperature of + 400 ° C; a relatively high relative humidity can be obtained at a lower temperature

(For example, 90% at 200 ° C and taking into account condensation due to temperature changes on the surface of the product.

○ Normal installation conditions:

A) installation categories: circuit breaker main circuit Ⅲ type control circuit and auxiliary circuit for Ⅱ;

B) installation conditions: the general should be vertical installation can also be installed horizontally (horizontal);

C) pollution level: 3.

D) External magnetic field: the external magnetic field near the installation site in any direction does not exceed 5 times the geomagnetic field.

 

Model and meaning 

 

Release mode and accessories code 

 Pic.1

The main technical parameters 

 Pic.2

Protection characteristics

Power distribution

Pic.3

Note: SMGM1-250 in the 100A, 125A, 140A specifications without 5In electromagnetic release.

Protection of motor

Pic.4

 

Product categories

According to the number of points: two poles, three poles, four poles

By use: power distribution, motor protection

 

By operating mode points:

Pic.5

Appearance and installation dimensions(mm)

Pic.6

Pic.7