Circuit breaker inner accessories and outer accessories:

Circuit breaker inner accessories:

1.Under voltage tripping mechanism(MN):

When voltage descend (or descend slowly) to 35%-70% of the rated voltage, under voltage tripping mechanism should have action; under voltage tripping mechanism should prevent circuit breaker close when power supply voltage lower than 35% of tripping mechanism voltage; under voltage tripping mechanism should ensure circuit breaker close when power supply voltage equal or higher than 85% of tripping mechanism voltage.

Rated parameter(see table 6)

Table 6 Under voltage tripping mechanism rated voltage and frequency

2.Shunt tripping mechanism (MX)

Circuit breaker can disconnect reliability when Shunt tripping mechanism voltage is 70%-110% of the rated voltage. (see table 7)

Table 7 Shunt tripping mechanism rated voltage and frequency

Note: When voltage specification is DC24V, rated current should get 5A±0.5A

Under voltage tripping mechanism wire connecting drawing:

Shunt tripping mechanism wire connecting drawing:

3.Auxiliary contact(OF) and alarm contact(SD)

a.        Auxiliary contact(OF)

Auxiliary contact wire connecting drawing

b.        Alarm contact(SD)

Alarm contact not act when circuit breaker OF/OFF normally, only alarm after trip-free(or fault trip), contact would change original position, from always open  to close or from always close to open. Alarm contact recover to original status after circuit breaker re-close.

Alarm contact wire connecting drawing

4.Prepaid electric meter special tripping mechanism

Rated working voltage(Ue) of the prepaid electric meter special tripping mechanism is AC230/50Hz, it can work normally when 65%-110% of Ue, circuit breaker will delay 0.5s-2s switching off after cut off Ctrl terminal.

Circuit breaker outer accessories:

1.        Electric operation mechanism rated parameter and code(see table 8)

Table 8 Electric operation mechanism rated voltage and frequency:

KXM2-63,100,225   electric operation mechanism:
KXM2-400,630,800,1250   electric operation mechanism:
KXM2-63,100,225,   400,630,800,1250 DC-AC electric operation mechanism:
Handle   operation mechanism

Circuit breaker install electric operation mechanism total height(mm)(see table 9)

Table 9: Circuit breaker install electric operation mechanism total height

2.        Manual operation mechanism installation size(see table 10)

KXM2-63～800 handle installation bore hole indicating drawing:

KXM2-1250 handle installation bore hole indicating drawing:

Table 10 Manual operation mechanism installation size:

3.        Mechanical interlock between two circuit breakers

Installation size drawing(see table 11)

4.        Table 11 Mechanical interlock between two circuit breakers installation size

Note: Should install circuit breaker into install rack firstly, then install interlock mechanism into circuit breaker. Related circuit breaker installation size please check Table 3, table 4.

Ordering instruction:

User place an order should order by order code

Order code consist of:

Model No.+ rated current specification code (see below table) + inner accessories rated voltage code(null:00) +electric operation mechanism rated voltage code (null:00)

For example: Order KXM2-100L, 50A, 3P, shunt tripping mechanism(MX)(AC230V), electric operation mechanism(AC230V), 10 sets

Order code is: KXM2-100LP/3310 50A AC230V 10