Sm1l Series Earth Leakage Circuit Breaker

1.Application 

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 
 
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). 


  
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)
 

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
 
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

 

5.2.2 The technical parameter and functions of the accessories
 

Auxiliary contact and Alarm contact: Auxiliary contact is as some as Alarm contact , the techni-cal parameter see following table