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    Item No.: LYMM1

    LYMM1 Series moulded casecircuit breakers(MCCB)

    Description：

    Applications
    LYMMl series moulded case circuit breaker(hereinafter referred to as circuit breaker) is applicable for AC 50/60HZ powerdistribution network circuit with rated insulation voltage of 800v, rated operation voltage of 690V and rated operation currentfrom 10A to 630A, it's used to distribute power and prevent circuit and power supply equipment from damage due to overload.short circuit, under voltage and other faults, it's also used for infrequent start of motor as well as overload, short circuit andunder voltage protection
    This circuit breaker owns advantages of small volume, high breaking capacity, short arcing (or nonarcing)etc, it can beequipped with accessories like alarm contact, shunt release, auxiliary contact etc, it's an ideal product for user. The residual current circuit breaker can either be vertically installed (vertical installation) or be horizontally installed (horizontalinstallation)
    The product is in accordance with the standards of lEC60947-2 and Gb140482

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      Product model and meaning

      Note: There are four types of neutral pole (N pole) for four phases product.The neutral pole of type A is not equipped with overcurrent tripping element, its always switched on, and it is not switched on or off together with other three poles.The neutral pole oftype B is not equipped with over-current tripping element, and it’s switched on or of together with other three poles(the neutralpole is switched on before being switched of)The neutral pole of type C is equipped with over-current tripping element, and it’sswitched on or off together with other three poles(the neutral pole is switched on before being switched off) The neutral pole oflype D is equipped with over-current tripping element, it’s always switched on and is not switched on or off together with otherthree poles

      Applications

      LYMMl series moulded case circuit breaker(hereinafter referred to as circuit breaker) is applicable for AC 50/60HZ powerdistribution network circuit with rated insulation voltage of 800v, rated operation voltage of 690V and rated operation currentfrom 10A to 630A, it’s used to distribute power and prevent circuit and power supply equipment from damage due to overload.short circuit, under voltage and other faults, it’s also used for infrequent start of motor as well as overload, short circuit andunder voltage protection
      This circuit breaker owns advantages of small volume, high breaking capacity, short arcing (or nonarcing)etc, it can beequipped with accessories like alarm contact, shunt release, auxiliary contact etc, it’s an ideal product for user.

      The residual current circuit breaker can either be vertically installed (vertical installation) or be horizontally installed (horizontalinstallation)
      The product is in accordance with the standards of lEC60947-2 and Gb140482

      Classification

      By breaking capacity: a standard type(type S) b higher breaking capacitytype(type H)By connection mode: a front board connection, b back board connection,c plugin type
      By operation mode: a direct handle operation, b rotation handle opera-tion,c electrical operation
      By number of poles: 1P,2P, 3P,4PBy accessory: alarm contact, auxiliary contact, shunt release, undervoltage release.

      Normal Service Condition

      The altitude of the installation site shall not exceed 2000m
      Ambient air temperature¥The ambient air temperature shall not exceed +40’C¥The average value shall not exceed +35’℃ with in 24 hoursThe ambient air temperature shall not be less than-5’CAtmosphere condition
      There relative humidity of atmosp here shall not exceed 50% at highest temperatureof +40℃,and it can be higher at a lower temperature,when the average lowest temp-erature in the wettest month doesn’t exceed 25℃ can be 90%,condensation onproduct surface due to temperature change must be take into account.
      The pollution level is class3

      Accessory nameElectronic releaseCompound release
      Auxiliary contact,under
      voltage release,alam contact      		287378
      Two auxiliary contact sets,
      alarm contact      		268368
      Shunt release,alarm
      contact,auxiliary contact      		238348
      Under voltage release,
      alarm contact      		248338
      Auxiliary contact alarm contact228328
      Shunt release alarm contact218318
      Auxiliary contact
      under-voltage release      		270370
      Two auxiliary contact sets260360
      Shunt release
      under-voltage release      		250350
      Shunt release
      auxiliary contact      		240340
      Under-voltage release230330
      Auxiliary contact220320
      Shunt release210310
      Alarm contact208308
      No accessory200300

      Main Technical Parameter

      1 Rated value of circuit breakers

      ModelImax
      (A)      		Specifi-
      cations
      (A)      		Rated
      Operation
      Voltage(V)      		Rated
      Insulation
      Voltage(V)      		Icu
      (kA)      		Ics
      (kA)      		Number
      of Poles
      (P)      		Arcing
      Distance
      (mm)
      LYMM1-63S636,10,16,20
      25,32,40,
      50,63      		40050010*5*3≤50
      LYMM1-63H6340050015*10*34
      LYMM1-100S10016,20,25,32
      40,50,63,
      80,100      		69080035/1022/53≤50
      LYMM1-100H10040080050352,3,4
      LYMM1-225S225100,125,
      160,180,
      200,225      		69080035/1025/53≤50
      LYMM1-225H22540080050352,3,4
      LYMM1-400S400225,250,
      315,350,
      400      		69080050/1535/834≤100
      LYMM1-400H40040080065353
      LYMM1-630S630400,500,
      630      		69080050/1535/834≤100
      LYMM1-630H63040080065453

      Note: When the test parameters for the 400V, 6A without heating release
      2 Inverse time breaking operation characteristic when each pole of over-current release for power distribution is powered on at the same time

      ltem of test Current (I/In)Test time areaInitial state
      Non-tripping current 1.05In2h(n>63A),1h(n<63A)Cold state

      Tripping current 1.3In
      2h(n>63A),1h(n<63A)      		Proceed immediately
      after No.1 test

      3 Inverse time breaking operation characteristic when each pole of over-current release for motor protection is powered on at the same time.

      Setting Current Conventional time Initial StateNote
      1.0in >2h Cold State
      1.2In ≤2h Proceeded immediately after the No.1 test
      1.5In ≤4min Cold State10≤In≤225
       ≤8min Cold State225≤In≤630
      7.2In 4s≤T≤10s Cold State10≤In≤225
       6s≤T≤20s Cold State225≤In≤630

      4 The instantaneous operation characteristic of circuit breaker for power dis-tribution shall be set as 10In+20%, and the one of circuit breaker for motorprotection shall be set as12ln+20%

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