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