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
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