YCM8 Thiết bị đóng cắt MCCB

 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

 

 

 

 

 

 

 

 

 

 

 

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.

TypeFrame InmBreaking capacity Icu/Ics(kA)  OperationPoles

YCM8125H  P4

MCCB800: 500,600,700,800125SHP: electric drive operation3: three poles

1250: 1000,1250,160016015/1025/18Z: rotational handle4: four poles

Note:25025/1835/25W: operate directly 

125 is the upgraded 63 frame,40025/1835/25  

160 is the upgraded 100 frame，63035/2550/35  

250 is the upgraded 225 frame，80035/2550/35  

630 is the upgraded 400 frame1600-50/35  

   -65/50 

Tripping mode and
inner accessoryRated Current (A)ApplicationOption for 4P MCCB

300125A2A

The first number indicate release mode125:   10, 16, 20, 32, 40, 50, 63,80, 100, 125 1: for distribution A: N pole without protection,can not switch

2: only with the instantaneous release device160:   10, 16, 20, 32, 40, 50, 63，80, 100, 125, 140, 1602: for protecting the motorB: N pole without protection,can switch

3: complex release250:   100, 125, 140, 160, 180,200, 225, 250 C: N pole with protection,can switch

Note: the last two numbers are attachment code(see attachment table)400:  250, 300, 315, 350, 400 D: N pole with protection,can not switch

 630:  400, 500, 630  

 800:  500, 630, 700, 800, 1000,1250  

 1600: 1000,1250,1600  

Accessory voltageMotor-driven operation voltageConnectionWith the connection  plate or not

Q1D1Q2

Shunt  ReleaseAuxiliary AlarmDC3Q: Front1: not

F1: AC220VJ1: AC125VElectric OperatingH: Back2: yes

F2: AC380VJ2: AC250VD5: AC230VC: Plug-in 

F3: DC110VJ3: DC125VD6: AC110V  

F4: DC24VJ4: DC24VD7: DC220V  

  D8: DC110V  

  D9: AC110-240V  

  D10: DC100-220V