High Quality Moulded Case Earth Leakage Circuit Breaker (mm1L)

1.Application MM1L series earth leakage circuit breaker are one of the new type earth leakage breakers which have been developed by the company using international advanced design and manufacturing technology. Suitable for a line of AC50Hz/60Hz, rated voltage up to 400V, rated current 16A to 630A. and is acted as infrequent changeover of circuit or infrequent starting of motor. The breaker has overload, short-circuit and under-voltage protective function, which can protect the circuit and the power equipment against damage, meanwhile, it can provide protection to these fire dangers that caused by these long-time existed grounding fault that can not be detected by the over-current protection. This breaker can be installed vertically(upright) or horizontally(transverse).Wiring of the breaker can not be in adverse direction, that means power supply line must be connected to terminal 1,3 and 5,and the load line connected to terminal 2,4 and 6. The rated residual operating current I△n and the maximum breaking time can be adjusted on site according to practical condition. The leakage protection module still can work normally when the phase voltage reduce to 50V. It has the same overall size with the AM1 series breakers, which make the installation more exchangeable. The breakers are suitable for isolation, its symbol are: The breakers comply with the demands of the following standards:IEC60947-1 and GB/T 14048.1 GeneralIEC60947-2 and GB 14048.2 Low voltage breakersIEC60947-4 and GB 14048.4 Contactors and motor startersIEC60947-5.1 and GB 14048.5 Electrical equipments of electromechanical control circuit 2. Main Technical Specifications TypeMM1L-100MM1L-225MM1L-400MM1L-630Frame Current Inm(A)100225400630Rated current In(A)(10)16,20,25,32,40,50,63,80,100100,125,160,180,200,225225,250,315,350,400400,500,630Pole Number34343434Rated Insulation Voltage Ui(V) AC800 Rated Working voltage Ue(V) AC 400V Rated impulse with stand voltage Uimp(V) 8000 Arc-over Distance(mm) >50 Breaking capacity gradeMH MH M M Limiting short-circuit breaking capacity lcu (kA)AC400V5085505085506565Service short-circuit breaking capacity lcs(kA)AC400V3550353550354242Rated residual operating current I △n(mA)Non-delay type 100/300/500 Delay type 100/300/500300/500/1000Rated residual nonoperatingcurrent I △no(mA) 1/2 I △ n Operation performance (time)Electrified1500100010001000Unelectrified8500700040004000             Note: According to the pole number of product, it calssifies three and four poles. The neutral pole (N-Pole) of the four-poles products has four types: Type A: N-pole without over-current release unit, it has been connected all the time, not closing and opening with the other three poles.Type B: N-pole without over-current release unit, which closing and opening with the other three poles. Type C: N-pole fixed with over-current release unit, which closing and opening with the other three poles. Type D: N-pole fixed with over-current release unit, it has been connected all the time, not closing and opening with the other three poles.1. The limiting breaking and arc-over distance includes horizontal and vertical installation.2. If the three-pole breaker of this series is connected with three phase load, the load can not have neutral line, otherwise the breaker will have fault action.3. If the three-pole breaker of this series is connected with single phase load, the phase line willbe connected to the left pole, and the neutral line is connected to the right pole, the middle pole is blanket3. Protection Characteristic The thermal release of the breaker has again-time-limit property; the electromagnetic release is inst. Operation, its property see table 2(for distribution),table 3 (motor protection). Rated current of Release(A)Thermal release (ambient temperature+40oC)Electromagnetic release operating current(A)1.05In(cold state ) non-operating time (h)1.03In(hot state) acting time (h)10 ≤ In ≤ 631110In±20%63 ≤ In ≤ 12522125 ≤ In ≤ 630225In±20% 10In±20% Rated current of ReleaseThermal release (ambient temperature +40oC)Electromagnetic Release operating current(A)1.0In (cold state) non-operating time(h)1.20In(hot state) acting time(h)1.50In(thermal state) operating time7.2In(cold state) operating time10≤In≤400228min6s < TP ≤ 20S12In±20%4. Residual current operating time of earth leakage circuit breaker4.1 Non-delay type operation characteristics see table 4(I△n≤30mA should be Non- delay type)Rated currentI△n2I△n5I△na10I△nNon-delay typeMax.breaking time(s)0.30.150.040.04      Note: ato I△n≤30mA earth leakage circuit breaker, 0.25A can instead of 5I△n According toa, adopt 0.25A, then 10 I△n is 0.5A.4.2 Delay type operation characteristics see table 5Limiting non-driven time of delay type earth leakage circuit breaker according to 2l△n,operation characteristics see table 5Delay time (s)Max. breaking time(s) at I△nLimiting non-driven time (s) at 2 I△nMax. breaking time(s)Max. breaking time(s) at 5I△nMax. breaking time(s) at 10 I△n0.10.40.060.2