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
Code | A2 | A4 | D1 | D2 |
Voltage specification | AC230V | AC400V | ||
Rated frequency | 50Hz | 50Hz |
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
Code | A2 | A4 | D1 | D2 | D3 |
Voltage specification | AC230V | AC400V | DC24V | ||
Rated frequency | 50Hz | 50Hz |
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)
Moulded case Inm | Conventional thermal current Ith A | Rated current when AC 400V Ie A | Rated current when DC230V Ie A |
Inm≤225A | 3 | 0.26 | 0.14 |
Inm≥400A | 6 | 3 | 0.2 |
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:
Model No. Classification | KXM2-63 KXM2-100 KXM2-225 | KXM2-400 KXM2-630 KXM2-800 KXM2-1250 | KXM2-63 KXM2-100 KXM2-225 KXM2-400 KXM2-630 KXM2-800 KXM2-1250 |
Structure type | Electromagnet | Electric motor | AC-DC |
Code | A2,A4 | A2,A4 | A1/D1,A2/D2,D3 |
Voltage specification | AC230V, AC400V | AC230V, AC400V | AC230V/DC220V |
Rated frequency | 50Hz | 50Hz | 50Hz |
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 |  |
KXM2-63,100,225 electric operation mechanism(AC) switch ON/OFF schematic diagram | Specification: AC50Hz,230V,400V | |
KXM2-400,630,800,1250 electric operation mechanism(AC) switch ON/OFF schematic diagram | Specification: AC50Hz,230V,400V | |
KXM2-63,100,225,400,630,800,1250 electric operation mechanism(AC/DC) switch ON/OFF schematic diagram | Specification: AC/DC50Hz, AC110C/DC110C; AC230V/DC220C, DC24V |
Circuit breaker install electric operation mechanism total height(mm)(see table 9)
Table 9: Circuit breaker install electric operation mechanism total height
Model No. Height | KXM2-63L | KXM2-63M | KXM2-100L | KXM2-100M KXM2-100H | KXM2-225L | KXM2-225M KXM2-225H | KXM2-400L KXM2-400M KXM2-400H
| KXM2-630L KXM2-630M KXM2-630H | KXM2-800M KXM2-800H | KXM2-1250H |
Hi(AC) | 155 | 164 | 152 | 170 | 182 | 199 | 238 | 246 | 247 | 300 |
H2(DC) | 160 | 171 | 153 | 171 | 177 | 194 | 255 | 262 | 261 | 290 |
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:
Model No. | KXM2-63 | KXM2-100 | KXM2-225 | KXM2-400 | KXM2-630 | KXM2-800 | KXM2-1250H |
installation size | 49 | 51 | 54 | 88 | 89 | 76 | 103 |
Operation handle to circuit breaker center Y | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
3. Mechanical interlock between two circuit breakers
Installation size drawing(see table 11)
4. Table 11 Mechanical interlock between two circuit breakers installation size
Model No. | C | D | E |
KXM2-63 | 80 | 30 | 80 |
KXM2-100 | 90 | 30 | 90 |
KXM2-225 | 100 | 30 | 100 |
KXM2-400 | 136 | 30 | 40 |
KXM2-630 | 172 | 48 | 62 |
KXM2-800 | 167 | 28 | 40 |
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)
Code | A | B | C | D | E | F | G | H | I | J | K | L | M |
Rated current(A) | 10 | 16 | 20 | 25 | 32 | 40 | 50 | 63 | 80 | 100 | 125 | 160 | |
Code | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Rated current(A) | 180 | 200 | 225 | 250 | 315 | 350 | 400 | 500 | 630 | 700 | 800 | 1000 | 1250 |
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
