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 name Electronic release Compound release
    Auxiliary contact,under
    voltage release,alam contact    		 287 378
    Two auxiliary contact sets,
    alarm contact    		 268 368
    Shunt release,alarm
    contact,auxiliary contact    		 238 348
    Under voltage release,
    alarm contact    		 248 338
    Auxiliary contact alarm contact 228 328
    Shunt release alarm contact 218 318
    Auxiliary contact
    under-voltage release    		 270 370
    Two auxiliary contact sets 260 360
    Shunt release
    under-voltage release    		 250 350
    Shunt release
    auxiliary contact    		 240 340
    Under-voltage release 230 330
    Auxiliary contact 220 320
    Shunt release 210 310
    Alarm contact 208 308
    No accessory 200 300

    Main Technical Parameter

    1 Rated value of circuit breakers

    Model Imax
    (A)    		 Specifi-
    cations
    (A)    		 Rated
    Operation
    Voltage(V)    		 Rated
    Insulation
    Voltage(V)    		 Icu
    (kA)    		 Ics
    (kA)    		 Number
    of Poles
    (P)    		 Arcing
    Distance
    (mm)
    LYMM1-63S 63 6,10,16,20
    25,32,40,
    50,63    		 400 500 10* 5* 3 ≤50
    LYMM1-63H 63 400 500 15* 10* 34
    LYMM1-100S 100 16,20,25,32
    40,50,63,
    80,100    		 690 800 35/10 22/5 3 ≤50
    LYMM1-100H 100 400 800 50 35 2,3,4
    LYMM1-225S 225 100,125,
    160,180,
    200,225    		 690 800 35/10 25/5 3 ≤50
    LYMM1-225H 225 400 800 50 35 2,3,4
    LYMM1-400S 400 225,250,
    315,350,
    400    		 690 800 50/15 35/8 34 ≤100
    LYMM1-400H 400 400 800 65 35 3
    LYMM1-630S 630 400,500,
    630    		 690 800 50/15 35/8 34 ≤100
    LYMM1-630H 630 400 800 65 45 3

    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 area Initial state
    Non-tripping current 1.05In 2h(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 State Note
    1.0in  >2h  Cold State
    1.2In  ≤2h  Proceeded immediately after the No.1 test
    1.5In  ≤4min  Cold State 10≤In≤225
     ≤8min  Cold State 225≤In≤630
    7.2In  4s≤T≤10s  Cold State 10≤In≤225
     6s≤T≤20s  Cold State 225≤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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