YCM8 SERIES MCCB
SHORT DESCRIPTION:
General
YCM8 Series circuit breakers were developed according to the demand of domestic and international market as well as features of similar products.
Its rated insulation voltage up to 1000V, is suitable for AC 50Hz distribution network circuit whose rated operation voltage is up to 690V, rated operation current from 10A to 800A. It can distribute power, protect the circuit and power supply devices from the damage of overload, short circuit and under voltage, etc.
This series circuit breaker feature small volume, high breaking capacity and short arcing. It can be installed vertically (namely vertical installation) and also installed horizontally (namely horizontal installation).
It complies with standards of IEC60947-2
Feature
Feature 1: Current limiting ability
Limiting the rise of short circuit current of circuit. The peak short circuit current and I2t power are much lower than the value expected.
U shape fixed contact design
The U shape fixed contact design achieves the technique of pre-breaking:
When the short circuit current pass through the contact system, there are forces that repel each other on the fixed contact and moving contact. The forces were produced with short circuit current synchronous and enlarge while short circuit current enlarge. The forces make the fixed contact and moving contact apart before tripping. They elongated the electric arcing to enlarge their equivalent resistance to limit the rise of short circuit current.
Feature 2: Modular accessories
The size of accessories is same for YCM8 with same frame.
You can choose the accessories according to your needs to extend the function of YCM8.
Feature 3: Frame miniaturization
5 frame class: 125 type, 160 type, 250 type, 630 type, 800 type
The rated current of YCM8 series: 10A~1250A
The outlook size of 125 frame is same as the original 63 frame, width is only 75mm.
The outlook size of 160 frame is same as the original 100 frame, width is only 90mm.
The outlook size of 630 frame is same as the original 400 frame, width is only 140mm.
Feature 4: Contact repulsion
The technical scheme:
See figure1, this new contact device is mainly consist of fixed contact, moving contact, shaft 1, shaft 2, shaft 3 and spring.
When the circuit breaker is closed, shaft 2 is at the right of spring angle. When there is large fault current, the moving contact rotate around the shaft 1 under the electric repulsion caused by current itself. When shaft 2 rotate over the top of spring angle, the moving contact rotate upward quickly under the reaction of spring and breaking the circuit fast. The breaking capacity is improved with the optimized contact structure.
Feature 5: Intelligent
YCM8 can be connected to Modbus communication system with special wire easily. With communication function, it can match with
monitoring unit accessories to realize the door display, reading, setting and control.
Feature 6: Arc extinguishing system is modular
Working Environment and Installation Condition
- Altitude: Below 2000m
- Temperature: The temperature of media is not higher than 40℃ ( +45℃ for marine products) and not lower than -5℃.
- Can withstand the bad environment of damp air, mold, radiation.
- The maximum inclination is 22.5 degree.
- Can work reliably under normal vibration of ship.
- Can work reliably under earthquake(4g).
- Should be no rain and snow hit.
- The media should be no explosion danger and no gas which can corrode the metal or destroy the insulating or conductive dust.
