KXM2E moulded case circuit breaker series MCCB MCB

KXM2E series electric molded case circuit breaker:

Main feature:

◎Have three section protection operation current, operation time is optional

◎user can adjust trip mechanism according to load current

◎have pre-alarm indication and overload indication

◎have overload alarm but non trip function which is special for fire fighting

◎Provide handheld type special detector, convenient for user to test circuit breaker parameter

Model No. and meaning:

Note:1)distribution type: no code; electric motor type code:2 ; warm tropical type code: TH

     2)direct operation: no code; electric operation code: P; turning handle type: Z

Summarization:

KXM2E series electric moulded case circuit breaker, rated isolating voltage is 800V, apply to circuit of AC50Hz, rated working voltage is 400V, rated working current till 800A for infrequence converting and electric motor infrequence start. Circuit breaker have overload long delay inverse time limit, short circuit short delay inverse time limit, short circuit delay definite time limit, short circuit instantaneous and undervoltage protection function, can protect circuit and power supply be destroyed.

◎Circuit breaker can be installed both vertically and horizontally

◎Circuit breaker suitable for isolating , express code is " "

Main performance technology:

◎KXM2E series digital moulded case circuit breaker have three section protection operation current, operation time optional: user can adjust trip mechanism according to load current requirement

◎Digital trip mechanism power be provided by circuit breaker itself, current signal and trip mechanism power supply come from annular current mutual inductor of circuit breaker;

Have pre-alarm function: circuit breaker cover LED indicate golden when overload current exceed presetting current;

Have overload indication: circuit breaker cover LED indicate red when ;pad current exceed presetting current;

Have special fire fighting function(overload alarm but non trip): circuit breaker won't trip when overload, but will output an one electrical independent contact signal to drive relative alarm device

◎Provide handheld type special detector, convenient for user to test circuit breaker parameter

◎According to IEC60947

Working surrounding and installation criteria:

◎Installation place altitude should lower than 2000m

◎Surrounding media temperature can't higher than +40℃ or lower than -5℃, average temperature in 24 hours can't be higher than +35℃(except special order request)

◎Installation place relative humidity can't exceed 50% at max temperature +40℃; higher relative humidity is acceptable when the temperature lower than +40℃, max relative humidity can reach 90% when the temperature at +20℃, we have special policy in condensation condition which may caused by temperature changing.

◎Humid tropical type circuit breaker relative humidity can't exceed 95% at 25℃;

◎Pollution degree: III

◎Main circuit of circuit breaker installation type is III, auxiliary circuit and control circuit (non connect to main circuit) installation type is II

◎Circuit breaker apply to electric magnetic surrounding A

◎Humid tropical circuit breaker can resist humid tropical, smoke, mycete affect.

◎Circuit breaker should install in the place without explosion risk, without conducting dust, unable metal corrosive and non-damage isolator

◎Installation place can't hit by rain, snow directly

◎Circuit breaker should install according to instruction.

Classification:

◎By rated current(A):

KXM2E-100:32(16,20,25,32),63(32,36,40,45,50,55,60,63),100(63,65,70,75,80,85,90,95,100)

KXM2E-225:100,125,140,160,180,200,225

KXM2E-400:200,225,250,280,315,350,400

KXM2E-630:400,420,440,460,480,500,530,560,600,630

KXM2E-800:630,640,660,680,700,720,740,760,780,800

◎By wire connecting way: front panel wire connecting, back panel wire connecting, front panel plug in type, back panel plug in type

◎By accessory: with accessory and without accessory

◎By inner accessory and outer accessory: Inner accessory have shunt trip mechanism(MX), undervoltage trip mechanism(MN), overload alarm(SD) and auxiliary contact(OF) five type; outer accessory have turning handle operation mechanism, electric operation mechanism, handheld type KXM2E detector.

Structure introduction:

◎Protection:

1.Overload long delay time operation current Ir1, have 4 tap position/gear to 10 tap position/gears according to different circuit breaker rated current adjustment.

2.Long delay time operation time t1, have 4 tap position/gears adjustment.

3. Short circuit delay time operation current Ir2, have 10 tap position/gears adjustment.

4. Short delay time operation time t2, have 4 tap position/gears adjustment.

5.Short circuit instantaneous operation current Ir3, have 8 gears/tap position, 9 gears/tap position and 10 gears/tap position adjustment.

6.Pre-alarm operation current Ir0, have 7 tap position/gears adjustment.

◎Other function

7.Testing terminal for trip mechanism present setting parameter testing

8.Electric trip mechanism working indication

9.Pre-alarm indication

10．Overload indication

11.Trip button

Trip mode and accessory code

Note:348 specification in KXM2E-630 and KXME-800, auxiliary contact(SD) is a pair contact(one normally open, one normally close), 368 specification auxiliary contacts are three pairs contacts(three normally open, three normally close)

Main technical index:

Power loss and derating factor

◎Power loss:

◎Derating factor of surrounding temperature changing

Electric trip mechanism characteristic:

◎Trip mechanism characteristic: have overload long delay inverse time limit, short circuit short delay inverse time limit, short circuit delay definite time limit, short circuit instantaneous and undervoltage protection function, user can set according your detailed request. Trip mechanism characteristic as below drawing:

                                                          Current(XIr1)(A)

◎Long delay time over current protection inverse time limit operation characteristic as below table:

Note: 1.Operation time according to I2T1=(2Ir1)2t1(1.2Ir1≤1≤Ir2)

2.Operation time tolerance is ±20%

3.Returnable time not less than 70% of operation time

◎Short delay time over current protection characteristic as below table:

Circuit breaker overall size and installation size

◎KXM2E-100(M,H) 3P, KXM2E-100 4P front panel wire connecting

X-X, Y-Y is 3P circuit breaker center

KXM2E-100(M,H) 3P, KXM2E-100 4P back panel wire connecting

X-X, Y-Y is 3P circuit breaker center

Note: Back panel wire connecting, plug in type overall and installation, hole boring size, according to accessory supplier's size, this series accessory size only for reference.  

◎KXM2E-100(M,H) 3P, KXM2E-100 4P plug in type front panel wire connecting

X-X, Y-Y is 3P circuit breaker center

KXM2E-100(M,H) 3P, KXM2E-100 4P plug in type back panel wire connecting

X-X, Y-Y is 3P circuit breaker center

Note: Back panel wire connecting, plug in type overall and installation, hole boring size, according to accessory supplier's size, this series accessory size only for reference.

◎KXM2E-225(M,H) 3P, KXM2E-225 4P front panel wire connecting

X-X, Y-Y is 3P circuit breaker center

KXM2E-225(M,H) 3P, KXM2E-100 4P back panel wire connecting

X-X, Y-Y is 3P circuit breaker center

Note: Back panel wire connecting, plug in type overall and installation, hole boring size, according to accessory supplier's size, this series accessory size only for reference. 

◎KXM2E-225(M,H) 3P, KXM2E-225 4P plug in type front panel wire connecting

X-X, Y-Y is 3P circuit breaker center

KXM2E-225(M,H) 3P, KXM2E-225 4P plug in type back panel wire connecting

X-X, Y-Y is 3P circuit breaker center

Note: Back panel wire connecting, plug in type overall and installation, hole boring size, according to accessory supplier's size, this series accessory size only for reference.

◎KXM2E-400(M,H) 3P, KXM2E-400 4P front panel wire connecting

X-X, Y-Y is 3P circuit breaker center

KXM2E-400(M,H) 3P, KXM2E-400 4P back panel wire connecting

X-X, Y-Y is 3P circuit breaker center

Note: Back panel wire connecting, plug in type overall and installation, hole boring size, according to accessory supplier's size, this series accessory size only for reference. 

◎KXM2E-400(M,H) 3P, KXM2E-400 4P plug in type front panel wire connecting

X-X, Y-Y is 3P circuit breaker center

KXM2E-400(M,H) 3P, KXM2E-400 4P plug in type back panel wire connecting

X-X, Y-Y is 3P circuit breaker center

Note: Back panel wire connecting, plug in type overall and installation, hole boring size, according to accessory supplier's size, this series accessory size only for reference.

◎KXM2E-630(M,H) 3P, KXM2E-630 4P front panel wire connecting

KXM2E-800(M,H) 3P, KXM2E-800 4P front panel wire connecting

X-X, Y-Y is 3P circuit breaker center

KXM2E-630(M,H) 3P, KXM2E-630 4P back panel wire connecting

KXM2E-800(M,H) 3P, KXM2E-800 4P back panel wire connecting

X-X, Y-Y is 3P circuit breaker center

Note: Back panel wire connecting, plug in type overall and installation, hole boring size, according to accessory supplier's size, this series accessory size only for reference. 

◎KXM2E-630(M,H) 3P, KXM2E-630 4P plug in type back panel wire connecting

  KXM2E-800(M,H) 3P, KXM2E-800 4P plug in type back panel wire connecting

X-X, Y-Y is 3P circuit breaker center

Note: Back panel wire connecting, plug in type overall and installation, hole boring size, according to accessory supplier's size, this series accessory size only for reference.

◎If users no special request, trip mechanism characteristic parameter as below configuration:

Note:KXM2E series digital type moulded case circuit breaker accessory as same as KXM2.