Gold Member Since 2015
Audited Supplier
Elecal Electric Appliance Co., Ltd.

Circuit Breaker, Switch, Sm1 manufacturer / supplier in China, offering Sm1l Series Earth Leakage Circuit Breaker, H7 Isolating Switch, Zw32-12 Outdoor High Voltage AC Vacuum Circuit Breaker and so on.

(/ )

Sm1l Series Earth Leakage Circuit Breaker

FOB Price: US $1 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $1/ Piece
Get Latest Price
Port: Ningbo, China
Transport Package: Carton
Payment Terms: T/T

Request a custom order and have something just for you!

Send Customized Request
Basic Info
  • Model NO.: SM1L
  • Operation: Electric Type
  • Arc-extinguishing Medium: Air
  • Structure: Moulded Case Circuit Breaker
  • Type: Circuit Breaker
  • Trademark: ELECAL
  • Breaking Capacity: High Voltage Circuit Breakers
  • Speed: High-Speed Circuit Breaker
  • Installation: Fixed
  • Poles Number: 4
  • Function: Conventional Circuit Breaker
  • Origin: Wenzhou
Product Description

SM1L 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 In 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 General
IEC60947-2 and GB 14048.2 Low voltage breakers
IEC60947-4 and GB 14048.4 Contactors and motor starters
IEC60947-5.1 and GB 14048.5 Electrical equipments of electromechanical control circuit 

2. Main Technical Specifications 
Frame Current Inm(A)100225400630
Rated current In(A)(10)16,20,25,32,40,50,63,80,100100,125,160,180,200,225225,250,315,350,400400,500,630
Pole Number34343434
Rated 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)AC400V5085505085506565
Service short-circuit breaking capacity lcs(kA)AC400V3550353550354242
Rated residual operating current I n(mA)Non-delay type 100/300/500 
Delay type 100/300/500300/500/1000
Rated residual nonoperatingcurrent I no(mA) 1/2 I n 
Operation performance (time)Electrified1500100010001000

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 blanket

3. 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 ≤ 12522
125 ≤ 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 time
10≤In≤400228min6s < TP ≤ 20S12In±20%

4. Residual current operating time of earth leakage circuit breaker

4.1 Non-delay type operation characteristics see table 4(In≤30mA should be Non- delay type)
Rated currentIn2In5Ina10In
Non-delay typeMax.breaking time(s)

Note: ato In≤30mA earth leakage circuit breaker, 0.25A can instead of 5In According toa, adopt 0.25A, then 10 In is 0.5A.

4.2 Delay type operation characteristics see table 5

Limiting non-driven time of delay type earth leakage circuit breaker according to 2ln,operation characteristics see table 5
Delay time (s)Max. breaking time(s) at InLimiting non-driven time (s) at 2 InMax. breaking time(s)Max. breaking time(s) at 5InMax. breaking time(s) at 10 In

5 .Accessories of circuit breaker

5.1 The external accessories of the breaker

Motor-driven operation device

1) Wiring diagram of type CDM electromagnetic operation device(fitting SM1L-100,225) see thefollowing drawing (wiring diagram of the external accessories of the breaker in the dotted frame)

2) Wiring diagram of type CD motor-driven operation device (fitting SM1L-400I630) see belows(wiring diagram of the external accessories of the breaker in the dotted frame)

Code description: SB1 SB2 stand for push button.(provided by users themselves) Number "1" "2" "3" stand for number of wiring terminals.Voltage rating: AC50Hz 230V 400V, DC 220V

Code description: SB1 SB2 stand for push button. (provided by users themselves) "X" stands for line connection terminalsVoltage rating: AC50Hz 230V 400V; DC220V

Rotary handle operation device The mechanism is used in moulded case circuit breaker to operate the draw-out panel. Powerdistribution panel and supply box outside the panel by turning the handle,and to ensure thedoor of panel would not be openned when the breaker being on. The hand-drive mechanism can be equiped with two types of operation one is "A" modelsquare handle , the other is "B" model round handle.

5.2 The internal accessories of the breaker
5.2.1 Release pattern and accessories code see following table

Release patternand accessories codeName\TypeSM1L- 100,225SM1L-400SM1L-630
200, 300No accessories200: Magnetic release (only short circuit protection)
300: Thermal magnetic release(both overload and short circuit protection)
208, 308Alarm contact   
210, 310Shunt release   
220, 320Auxiliary contact   
230, 330Under-voltage release   
228, 328Auxiliary contact,Alarm contact   

5.2.2 The technical parameter and functions of the accessories
AccessoryRated operating voltage (V)
Shunt Release Us220(230)380(400)110220
Under-voltage Release Us220(230)380(400)  

Auxiliary contact and Alarm contact: Auxiliary contact is as some as Alarm contact , the techni-cal parameter see following table
Rated heating current Ith (A)Rated operating current Ie(A)Suited Frame Inm(A)
30.30.15100, 225
30.40.15400, 630
Accessories nameFunctionWiring connection diagram
Alarm contactIndicate circuit breaker at tripping 
Auxiliary contactIndicate circuit breaker at opening or closing 
Shunt releaseThe shunt release should make the breaker trip reliably when theoperatiopn voltage is 70%-110% of rated control voltage 
Under-voltageWhen Ue is 35%-70% of the rated control voltage, the under voltagerelease should make the breaker trip correctlyWhen Ue is 85%-110% of the rated control voltage, the under voltagerelease should make the breaker closeIn case of Ue less than 35%of the rated control voltage should preventthe breaker from closing 
TypeOutline dimensionsInstallation dimensions
Back panel connectionBack panel connectionPlug-in
Sm1l Series Earth Leakage Circuit Breaker
Send your message to this supplier
Ms. Chris Shen
To: Ms. Chris Shen

Enter between 20 to 4,000 characters.

This is not what you are looking for? Post a Sourcing Request Now