China XUCKY Electric customized M11 Electronic Moulded Case Circuit Breaker are new upgraded circuit breakers researched and developed by the company combined with the advantages of similar international products and demand of domestic and international markets.
M11, M11LY, M11RT, M11E and M11EL series of circuit breakers are new upgraded circuit breakers researched and developed by the company combined with the advantages of similar international products and demand of domestic and international markets.
With insulation voltage up to 1000V, the circuit breaker is applicable for distribution systems of AC50Hz, rated working voltage 690V and rated working current from 10A-1250A, used to distribute electric power energy, protect circuits and power equipment against overload, short circuit, under voltage and so on, also can be used for infrequent startup of motor and protect it from overload, short circuit or under voltage.
It is featured with small size, high breaking, short flashover, etc., is the ideal product for users. It can be vertically installed or horizontally installed.
M11DC series DC moulded-case circuit breaker (hereinafter referred to as circuit breaker) is suitable for DC systems of rated voltage up to and including DC 1000V and rated current 10~800A, used to distribute electric power energy, protect circuits and power equipment against overload, short circuit and so on.
The products can be fed with wires from top and bottom, and it is polarity-free.
It complies with the standards IEC 60947-2, GB14048.2, etc.
Feature 1: current limiting capacity
Current-limiting refers to limit of the increase of short-circuit current in the loop, and in the loop protected by M11, peak value of the short-circuit current and the I2t energy in the circuit will be much smaller than the prospective value.
U-shaped fixed contact
Unique U-shaped fixed contact can achieve pre-breaking technology:
The so-called pre-breaking technology refers to when short-circuit current flows through the contact system, electric power generated by U-shaped fixed contact and moving contact is mutual exclusive. The greater the short-circuit current is, the greater the repulsion of the electromotive force, and it is generated together with the short-circuit current at the same time. Before the trip action occurs, the electrodynamic repulsion force can make the fixed and moving contact separation, by increasing the arc to increase the equivalent resistance between them to achieve the purpose of suppressing increase of short-circuit current.
Feature 2: modular accessories
◆ Accessory: For the circuit breakers of the same frame, they has uniform sizes regardless of the breaking capacity and rated current;Accessory: Users can freely
◆ choose and expand functions of circuit breakers according to their needs
◆ Modular accessories have insulation function, which is easy for hot-line operation and installation.
Feature 3: miniaturized frame
5 frame sizes: 125 type, 160 type, 250 type, 630 type, 800 type, 1250 type
Rated current of M11 series 10A~1250A
Feature 4: contact repulsion device (patented technology)
The technical scheme adopted by the invention is:
As shown in Figure 1, the new contact device is mainly consisted of fixed contact, moving contact, shaft 1, shaft 2, shaft 3 and springs;
When the circuit breaker is in the closed state, shaft 2 acts on the right side of the spring angle; When the circuit breaker has a large fault current, the moving contact will be subjected to the electric repulsion generated by the current itself, and rotate with the center of shaft 1, when shaft 2 rotates to the top of the spring angle with the moving contact, it makes moving contact to rapidly rotate upwards and quickly break the circuit upon the reaction of spring, it has enhanced the breaking capacity of the product through optimization of the contact structure.
Feature 5: intelligence
Network communication is more convenient. It accesses to Modbus communication system through dedicated connection. M11E / M11EL with communication function can select monitoring accessories to realize door display, read, set and control.
Feature: modularized arc extinguishing system
Feature 7: unification
The six series of M11, M11LY, M11DC, M11RT, M11E, and M11EL under the same frame size have the same dimensions, installation dimensions and appearance style, which is completely unified design.
◆ Altitude up to 2000m;
◆ Ambient medium temperature should be within -5℃ to +40℃ (+45℃ for marine products);
◆ It can withstand the effect of damp air;
◆ It can withstand the effect of moulds;
◆ It can withstand the effect of nuclear radiation;
◆ The max inclination is 22.5℃.
◆ It still can work reliably when the ship subjects to normal vibration;
◆ t can still work reliably if the product subjects to the earthquake (4g).
◆ Places where the surrounding medium is free from explosion danger, and far away from gas or conductive dust that would erode the metal or destroy the insulation;
◆Keep away from rain or snow.
1 Auxiliary switch | 5 Terminal cap | 9 Manual operation |
2 Alarm switch | 6 Phase partition | 10 Plug-in type back-board wiring |
3 Shunt release | 7 Front-board wiring | 11 Back-board wiring |
4 Undervoltage release | 8 Electric operation |
M11 | 125 | C | P | 4 | |||
↓ | ↓ | ↓ | ↓ | ↓ | |||
Product code | Frame size | Current class | Code of control circuit source voltage | Pole number | |||
Moulded-case | 125 160 250 400 630 800 | S | M | H | P: electric operation | 3: 3-pole | |
circuit breaker | Note: | 125 | 25/15 |
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35/25 | Z: rotary handle | 4: 4-pole |
125 is upgraded type of 63 frame | 160 | 35/25 | 50/35 | 70/50 | W: direct operation | ||
160 is upgraded type of 100 frame | 250 | 35/25 | 50/35 | 70/50 | |||
250 is upgraded type of 225 frame | 400 | 50/35 | 65/42 | 85/50 | |||
630 is upgraded type of 400 frame | 630 | 50/35 | 65/42 | 85/50 | |||
800 | 50/35 | 65/42 | 85/50 |
300 |
125A |
2 |
A |
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↓ |
↓ |
↓ |
↓ |
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Release type and internal accessory |
Rated current (A) |
Application |
Code of four-pole product |
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The first digit represents release type |
125 |
10, 16, 20, 25, 32, 40, 50,63, 80, 100, 125 |
1: power distribution |
A: N-pole without protection cannot close or open |
2: Has instantaneous release only |
160 |
63, 80, 100, 125, 140, 160 |
2: motor protection |
B: N-pole without protection can close and open |
3: Complex release Note: |
250 |
100, 125, 140, 160,180, 200, 225, 250 |
C: N-pole with protection can close and open |
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Later two digits are the code of accessories (see accessory table) |
400 |
250, 300, 315, 350, 400 |
D: N-pole with protection cannot close or open |
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630 |
400, 500, 630 |
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800 |
500, 630, 700, 800 |
Q1 |
D1 |
Q |
2 |
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↓ |
↓ |
↓ |
↓ |
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Accessory voltage |
Electric operation voltage |
Installation methods |
Install wiring board or not |
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Undervoltage release |
Shunt release |
Auxiliary alarm |
DC1 Electric Operation |
DC3 Electric Operation |
Q: Front-board |
1: No |
Q1: AC220V |
F1: AC220V |
J1: AC125V |
D1: AC220V |
D5: AC230V |
H: Back-board |
2: Yes |
Q2: AC240V |
F2: AC380V |
J2: AC250V |
D2: AC230V |
D6: AC110V |
C: Plug-in type |
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Q3: AC380V |
F3: DC110V |
J3: DC125V |
D3: AC380V |
D7: DC220 |
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Q4: AC415V |
F4: DC24V |
J4: DC24V |
D4: AC400V |
D8: DC110 |
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D9: AC110-240V |
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D10: DC100-220V |
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Note: |
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Adaptable voltages for two electric |
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operations. Please refer to the |
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introduction of external accessory. |
● Circuit breaker can be equipped with undervoltage release, shunt release, auxiliary contacts, alarm contacts, electric operating mechanism, rotary operating handle and other accessories.
● Circuit breaker has protection functions of overload long delay, short-circuit short delay and short-circuit instantaneous protection, the user can set the required protection characteristics (user only needs to operate the DIP switch for settings of protection function parameters).
● Circuit breaker has ground fault and thermal analog protection functions, pre-alarm indication over-current indication, load current indication, digital current analysis technology, and it can achieve a higher level of protection.
M11 thermal overload technical data sheet |
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Frame current (A) |
125 |
160 |
250 |
400 |
630 |
800 |
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Model |
M11-125C |
M11-125S |
M11-125H |
M11-160C |
M11-160S |
M11-160H |
M11-250C |
M11-250S |
M11-250H |
M11-400S |
M11-400H |
M11-630S |
M11-630H |
M11-800S |
M11-800H |
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Pole number |
1, 2, 3, 4 |
2, 3, 4 |
3, 4 |
3, 4 |
3, 4 |
3, 4 |
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Rated current (A) |
10, 16, 20, 32, 25, 40, 50,63, 80, 100, 125 |
63, 80, 100, 125, 140, 160 |
100, 125, 140, 160, 180,200, 225, 250 |
250,315,350,400 |
250, 315, 350, 400, 500, 630 |
500, 630, 700, 800,1000,1250 |
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Rated voltage (V) |
AC400V |
AC400V |
AC400V |
AC400V |
AC400V |
AC400V |
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Rated insulation voltage (V) |
AC1000V |
AC1000V |
AC1000V |
AC1000V |
AC1000V |
AC1000V |
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Short-circuit breaking capacity(KA)Icu/Ics |
AC400V |
10/15 |
18/15 |
25/18 |
20/15 |
25/18 |
35/25 |
25/15 |
25/18 |
35/25 |
35/25 |
50/35 |
35/25 |
50/35 |
50/35 |
65/65 |
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Operating cycle number |
Electrical life |
6000 |
3000 |
3000 |
2000 |
2000 |
1500 |
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Mechanical life |
9000 |
7000 |
7000 |
4000 |
4000 |
4000 |
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Outline dim(mm) |
1P |
25-130-68-90 |
- |
- |
- |
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a-b-c-ca |
2P |
50-130-68-90 |
60-155-68-90 |
60-155-88-115 |
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3P |
75-130-68-90 |
90-155-68-90 |
90-155-88-115 |
105-165-68-92 |
105-165-88-115 |
140-257-103-155 |
140-257-103-155 |
210-275-103-155 |
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4P |
100-130-68-90 |
120-155-68-90 |
120-155-88-115 |
140-165-68-92 |
140-165-88-115 |
184-257-103-155 |
184-257-103-155 |
280-275-103-155 |
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Weight (kg) |
1P |
0.32 |
- |
- |
- |
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2P |
0.5 |
0.55 |
1 |
1.1 |
1.5 |
1.7 |
5.5 |
5.7 |
9.5 |
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3P |
0.55 |
0.65 |
1.1 |
1.2 |
1.9 |
2.1 |
7 |
7.5 |
12.5 |
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4P |
0.65 |
0.8 |
1.4 |
1.5 |
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Electric operating device (MD) |
● |
● |
● |
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External driving operating handle |
● |
● |
● |
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Automatic release |
Thermal electromagnetic type |
Thermal electromagnetic type |
Thermal electromagnetic type |
M11RT thermal adjustable and magnetic adjustable (TAMA) technical data sheet |
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Frame current (A) |
160 |
250 |
400 |
630 |
1250 |
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Model |
M11RT-160S |
M11RT-160H |
M11RT-250S |
M11RT-250H |
M11RT-400S |
M11RT-400H |
M11RT-630S |
M11RT-630H |
M11RT-1250S |
M11RT-1250H |
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Pole number |
3, 4 |
3, 4 |
3, 4 |
3, 4 |
3, 4 |
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Rated current (A) |
20-25, 25-32, 32-40, 40-50, 50-63, |
100-125, 125-160, 160-200, 200-250A |
200-250, 250-320,320-400 |
400-500, 500-630 |
630-800,800-1250 |
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63-80,80-100, 100-125A, 125-160A |
AC400V |
AC400V |
AC400V |
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Rated voltage (V) |
AC400V |
AC400V |
AC1000V |
AC1000V |
AC1000V |
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Rated insulation voltage (V) |
AC1000V |
AC1000V |
35/25 |
50/35 |
35/25 |
50/35 |
50/35 |
65/50 |
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Short-circuit breaking capacity (KA)Icu/Ics |
AC400V |
25/18 |
35/25 |
25/18 |
35/25 |
2000 |
2000 |
1500 |
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Operating cycle number |
Electrical life |
3000 |
3000 |
4000 |
4000 |
4000 |
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Mechanical life |
7000 |
7000 |
1000 |
1000 |
1000 |
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Outline dim(mm) a-b-c-ca
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3P |
90-155-68-90 |
90-155-88-115 |
105-165-68-92 |
105-165-88-115 |
140-257-103-155 |
140-257-103-155 |
210-275-103-155 |
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4P |
120-155-68-90 |
120-155-88-115 |
140-165-68-92 |
140-165-88-115 |
185-257-103-155 |
185-257-103-155 |
280-275-103-155 |
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Weight (kg) |
3P |
1 |
1.1 |
1.5 |
1.7 |
5.5 |
5.7 |
9.5 |
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4P |
1.1 |
1.7 |
1.9 |
2.1 |
7 |
7.5 |
12.5 |
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Electric operating device (MD) |
● |
● |
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External driving |
● |
● |
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operating handle |
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Automatic release |
Thermal electromagnetic type |
Thermal electromagnetic type |
M11E Electronic type MCCB technical data sheet |
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Frame current (A) |
160 |
250 |
400 |
630 |
1250 |
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Model |
M11Е-160H |
M11Е-250H |
M11Е-400H |
M11Е-630H |
M11Е-1250H |
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Pole number |
3, 4 |
3, 4 |
3, 4 |
3, 4 |
3, 4 |
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Rated current (A) |
16-32, 40-125,80-160 |
16-32,40-125,80-160,100-250 |
200-400 |
200-400,300-630 |
400-800,800-1250 |
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Rated voltage (V) |
AC400V |
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Rated insulation voltage (V) |
AC1000V |
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Short-circuit breaking capacity(KA)Icu/Ics |
AC400V |
35/25 |
35/25 |
50/35 |
50/35 |
65/50 |
Operating cycle number |
Electrical life |
1500 |
1000 |
1000 |
1000 |
1000 |
Mechanical life |
7000 |
7000 |
4000 |
4000 |
4000 |
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Outline dim(mm) a-b-c-ca
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3P |
90-155-88-115 |
105-165-88-115 |
140-257-103-155 |
140-257-103-155 |
210-257-103-155 |
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4P |
90-155-88-115 |
140-165-88-115 |
185-257-103-155 |
185-257-103-155 |
280-257-103-155 |
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Weight (kg) |
3P |
1.8 |
2.1 |
5.5 |
5.7 |
5.7 |
4P |
2.3 |
2.6 |
7 |
7.5 |
7.5 |
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Electric operating device (MD) |
● |
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External driving operating handle |
● |
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Automatic release |
Electronic type |
Intelligent release panel
● IR(A) Isd(x IR) Ii(x IR)
● IR: Overload long delay tripping setting current; Isd: Short-circuit short delay tripping setting current;
● Ii: Short-circuit instantaneous tripping setting current;
● tR: Overload long delay setting time, factory default: 60s;
● tsd: Short-circuit short delay setting time, factory default: 0.1s;
● Ip: Overload pre-alarm setting current, factory default: 0.85*IR;
1:Power supply input DC24V(+) |
6:485B- |
2:Power supply input DC24V(-) |
7:Closing and opening common terminal of electric operating mechanism |
3:485A+ |
8:Closing and opening common terminal of electric operating mechanism |
4:485A+ |
9:Opening of electric operating mechanism |
5:485B- |
10:Closing of electric operating mechanism |
What is a molded case circuit breaker?
Molded Case Circuit Breakers (MCCB) is a required component of electrical systems, providing overload protection and short-circuit protection. In most cases, MCCBs are installed in the main power distribution board of a facility, allowing the system to be easily shut down when necessary.
What is the difference between a MCCB and ICCB breaker?
ICCBs are similar to molded case circuit breakers, but unlike MCCBs, insulated case breakers often use an electronic circuit to monitor electrical current and a stored energy mechanism that is usually charged by manipulating a charging handle.
What is the difference between MCCB and RCCB?
An MCCB works on a thermal magnetic mechanism, which means it's built to protect against both overload and short circuit faults. An RCCB only offers protection against residual currents or earth leakage current, and is usually used to prevent shocks from electricity and other hazards caused by earth fault currents.
What is a MCCB used for?
A moulded case circuit breaker (MCCB) is a type of electrical protection device that is used to protect the electrical circuit from excessive current, which can cause overload or short circuit.
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