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MCCB ETS6N Moulded Case Circuit Breaker 35/50KA 50/50KA
Manufacturer OEM
Standards:IEC/EN60947-2
Breaking capacity:10KA-35KA
Rated Current:100-400A
MCCB is the short form of Molded Case Circuit Breaker. It is the circuit breaker used when the loaded current is higher than the limit of a MCB. MCCB is an electrical protection device which has the same protection of MCB. It is used for protection against overload and short circuit faulse and can be also used as an isolator or main switch. It is mainly used in industrial applications and higher current rating and fault level residential applications because its wide rated current and high breaking capacity. MCCB can be used to offer protection for the capacitor bank generator and main electric feeder distribution.
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Description
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 STM6, peak value of the short-circuit current and the 12t energy in the circuit will be much smaller than the prospective value.
U-shaped static contact
Unique U-shaped static 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 static 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 electro dynamic repulsion force can make the static 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: modularized 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.
Modularized accessories have insulation function, which is easy for hot-line operation and installation.
Feature 3:miniaturized frame
5frame sizes:125 type,160 type,250 type,630 type,800 type Rated current of ETS6 series 10A~800A
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 static 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. it can be with communication function can select monitoring accessories to realize door display, read, set and control.
Feature 6: modularized arc extinguishing system
Feature 7: unification, under the same frame size have the same dimensions, installation dimensions and appearance style. which is completely unified design.
Working environment and installation conditions: 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 molds;
It can withstand the effect of nuclear radiation:
The max inclination is22.5℃.
It still can work reliably when the ship subjects to normal vibration;
It can still work reliably if the product subjects to the earthquake (4gl.
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.
Circuit breaker components:
1Auxiliary switch
2Alarm switch
3Shunt release
4Undervoltage release
5Terminal cap
6Phase partition
7 Front-board wiring
8Electric operation
9Manual operation
10 Plug-in type back-board wiring
11Back-board wiring
