YCB6 Miniature Circuit Breaker(MCB)
YCB6 Miniature Circuit Breaker(MCB)
YCB6-63 miniature circuit breaker(circuit breaker) is applicable to the circuit with AC50Hz/60Hz, rated voltage of no more than 400V， rated current up to 63 A for overload protection and short circuit protection. This product can be applied to various places such as industrial, commercial, tall buildings,and residential houses.
Standard: IEC60898-1
Type designation
Technical data
| Type | Standard | IEC/EN 60898-1 | |
| Electrical features |
Rated current In | A | 1,2,3,4,6,10,16,20,25,32,40,50,63 |
| Poles | P | 1,2,3,4 | |
| Rated voltage Ue | V | 230/400 | |
| Insulation voltage Ui | V | 500 | |
| Rated frequency | Hz | 50/60 | |
| Rated breaking capacity | A | 30,004,500 | |
| Rated impulse withstand voltage(1.2/50)Uimp | V | 4000 | |
| Dielectric test voltage at ind.Freq.for 1min | kV | 2 | |
| Pollution degree | 2 | ||
| Thermo-magnetic release characteristic | B,C,D | ||
| Mechanical features |
Electrical life | t | 6000 |
| Mechanical life | t | 20000 | |
| Protection degree | IP20 | ||
| Reference temperature for setting of therma element |
℃ | 30 | |
| Ambient temperature (with daily average≤35℃) |
℃ | -5~+40 | |
| Storage temperature | ℃ | -25~+70 | |
| Installation | Terminal connection type | Cable/Pin-type busbar | |
| Terminal size top/bottom for cable | mm² | 25 | |
| AWG | 18-3 | ||
| Terminal size top/bottom for busbar | mm² | 25 | |
| AWG | 18-3 | ||
| Tightening torque | N*m | 2 | |
| In-lbs | 18 | ||
| Mounting | On DIN rail EN 60715(35mm)by means of fast clip device | ||
| Connection | From top or bottom |
Selection
| B,C,D | 1.13ln | t≤1h(In≤63A) | Not tripping | B | 3In | t≤0.1s | Not tripping | |
| 1.13ln | t≤2h(In>63A) | C | 5In | t≤0.1s | ||||
| B,C,D | 1.45In | t<1h(In≤63A) | Tripping | D | 10ln | t≤0.1s | ||
| 1.45ln | t<2h(In>63A) | B | 5In | t<0.1s | Tripping | |||
| B,C,D | 2.55ln | 1s<t<60s(In≤32A) | Tripping | C | 10ln | t<0.1s | ||
| 2.55In | 1s<t<120s(In>32A) | D | 20ln | t<0.1s |
Curve
Temperature drop correction table
The maximum allowable current of the circuit breaker is related to the ambient temperature of the circuit breaker. The ambient temperature refers to the temperature in the distribution box or switch cabinet where the circuit breaker is installed. The reference temperature of various circuit breakers can be found in the values of the colored rows in the table.
| temperature(℃) | -5 | 0 | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 |
| Rated current | |||||||||||
| 1A | 1.16 | 1.14 | 1.11 | 1.09 | 1.07 | 1.05 | 1.02 | 1.00 | 0.98 | 0.95 | 0.92 |
| 2A | 2.30 | 2.26 | 2.22 | 2.18 | 2.13 | 2.08 | 2.04 | 2.00 | 1.96 | 1.92 | 1.88 |
| 4A | 4.72 | 4.63 | 4.53 | 4.43 | 4.32 | 4.22 | 4.11 | 4.00 | 3.89 | 3.77 | 3.65 |
| 6A | 6.97 | 6.84 | 6.71 | 6.57 | 6.43 | 6.29 | 6.15 | 6.00 | 5.85 | 5.69 | 5.53 |
| 10A | 12.25 | 11.95 | 11.65 | 11.34 | 11.02 | 10.69 | 10.35 | 10.00 | 9.64 | 9.26 | 8.86 |
| 16A | 18.72 | 18.35 | 17.98 | 17.60 | 17.22 | 16.82 | 16.42 | 16.00 | 15.57 | 15.13 | 14.68 |
| 20A | 23.24 | 22.80 | 22.36 | 21.91 | 21.45 | 20.98 | 20.49 | 20.00 | 19.49 | 18.97 | 18.44 |
| 25A | 29.12 | 28.57 | 28.01 | 27.43 | 26.85 | 26.24 | 25.63 | 25.00 | 24.35 | 23.69 | 23.01 |
| 32A | 37.18 | 36.49 | 35.78 | 35.05 | 34.32 | 33.56 | 32.79 | 32.00 | 31.19 | 30.36 | 29.50 |
| 40A | 46.66 | 45.77 | 44.86 | 43.93 | 42.98 | 42.01 | 41.02 | 40.00 | 38.96 | 37.88 | 36.78 |
| 50A | 58.57 | 57.43 | 56.26 | 55.06 | 53.84 | 52.59 | 51.31 | 50.00 | 48.65 | 47.27 | 45.84 |
| 63A | 74.73 | 73.17 | 71.57 | 69.94 | 68.27 | 66.56 | 64.81 | 63.00 | 61.14 | 59.22 | 57.24 |
Overall and mounting dimensions(mm)
General
Type designation
Function
| Accessory name | Code | Function |
| Auxiliary contact | OF | Provide auxiliary signal and control auxiliary circuit |
| Alarm contact | SD | When the circuit breaker is due to a fault,the alarm signal would work and indicate. |
| Shunt release | MX | Over the range of 70%～110%of the rated control supply voltage,the release should trip the circuit breaker to protect the circuit. |
| Shunt release+ Auxiliary contact |
MX+OF | Remote control of circuit and control the auxiliary circuit by auxiliary contact. |
| Over-voltage and under-voltage release |
MV+MN | When the rated voltage 230V increase to 270V+/-5%or reduce to 170V+/-5%, the circuit breaker should trip for over-voltage and under-voltage protection. |
installation
Al the electrical accessories should be installed at the side of the circuit breaker,details are shown in the figure below.(Remark:eeach MCB can be installed with 3(MAX.)indicating accessories.)
Operating Conditions
● Ambient temperature:-5℃~+40℃;
● Altitude:Below 2000m;
● Environment:The medium should be no risk of blasting and can’t corrode the metal and damage insulating gas as well as conductive dust;
● Installation:35mm standard din rail.
Technical data
Auxiliary contact and Alarm contact technical parameters
| Accessory name | Rated current(A) | Number of contacts | ||
| AC 380V | AC 220V | AC 110V | ||
| Auxiliary contact OF |
3 | 6 | 1 | 1NO 1NC |
| Alarm contact SD |
3 | 6 | 1 | 1NO 1NC |
Shunt release,Shunt release+Auxiliary contact technical parameters
| Accessory name | Rated insulation voltage Ui |
Rated control voltage Us |
Tripping power consumption (W or VA) |
Operation voltage Us |
| Shunt release MX |
415V | AC/DC:220~380V 110~220V |
240 | 0.7~1.1 |
| AC/DC:24~48V | 120 |
Under-voltage &Over-voltage Release technical parameters
