Good quality 300 Amp Circuit Breaker - DAB5 MCB – DaDa
- Contact Us
- Address: Shanghai DaDa Electric Co.,Ltd.
- Phone: 0086-15167477792
- Email: charlotte.weng@cdada.com
Good quality 300 Amp Circuit Breaker - DAB5 MCB – DaDa Detail:
Normal operating conditions and installation conditions
Ambient air temperature: -5℃~40℃, and average temperature in 24h below +35℃.
Altitude of the installation site should not exceed 2000m.
Atmospheric relative humidity at ambient air temperature is + 40℃ for not more than 50%, in the low temperature can have higher relative humidity. For example, in +20℃ , the relative humidity can reach 90%.
It should be noted that, due to temperature changes, for appropriate condensation produced occasionally, appropriate measures should be taken (such as drainage holes).
The installation adopts vertical installation. The inclination of the mounting plane to the vertical plane should not exceed ± 5 °
The place without significant shake and shock vibration.
If installed in a closed protective case, and more than one are installed closely, which should be used after the derating, derating factor optional 0.7 ~ 0.8, use high-value for metal protective case, for plastic protective case, you can use low value .
Structure
Parts of DAB5-63 Miniature Circuit Breaker made in china are positioned by the plastic housing. Case is made of new plastic with flame retardant, high strength and arc-resistant, which has stronge impact resistance and good flame retardant properties. Contact system uses electric repulsion structure, the effect of current limiting is significant, greatly improving the 220V circuit breaker‘s breaking capability. Release uses solenoid-type electromagnetic trip, accurate and stable setting current. Multi-pole products are assembled by the single pole.
DAB5 series new miniature circuit breakers are used for non-trained personnel to use, without maintenance. The protection characteristics of over-current release has been set before leaving the factory, the user can not adjust it when using, to avoid affecting performance.
DAB5-63 series new circuit breakers can be built-in various accessories, such as shunt release, over-voltage protection device, convertible DC circuit breakers and so on.
Using wire connection, the maximum round copper conductors is 25mm ². Use TH35-7.5 standard steel rail for installation.
Structure Description
Main contacts of DAB5-63 Miniature Circuit Breaker made in china switch on by manual operation or electric. After the main contact closes, the free trip mechanism locks the main contact in the closing position. The coil of the overcurrent release and the thermal element of the thermal release are connected in series with the main circuit. The coil of the undervoltage release is connected in parallel with the power supply. When the circuit has short-circuit or serious overload, the armature of overcurrent release will pull in, so that the free trip mechanism act, the main contact disconnect the main circuit. When the circuit is overload, the thermal element of the thermal release heats to make the bimetal bend and push the free trip mechanism to act. When the circuit is undervoltage, the armature of the undervoltage release is released, and also make the free tripping mechanism act. Shunt release is used as a remote control, in normal work, the coil is cut off, when needing distance control, press the start button to make coil have electricity, armature drives free tripping mechanism to act, the main contact is cut off.
Main parameters and technical performance
Main Specifications:
According to the rated current In: 1A, 2A, 3A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A.
According to the pole(POLE): 1P.Single-pole; 2P. Two-poles; 3P. Three-poles; 4P. Four-poles.
According to the circuit breaker instantaneous release form: a.B type (3ln ~ 6ln); b.C type (5ln ~ 10ln); c.D type (10ln ~ 20ln).
Mechanical and electrical life: a. Electrical life: not less than 4000 times; b. Mechanical life: not less than 10000 times.
Rated short – circuit capacity
| Rated current | Pole | Rated voltage（V） | Rated short – circuit current（A） |
| 1~63A | 1P | 230/400 | 6000 |
| 1~63A | 2P、3P、4p | 400 | 6000 |
Over-current protection characteristics Ambient temperature 30 ℃ ~ 35 ℃ and less
| No. | Trip type | Rated current In | Test current A | Appointed time | Prosrective result | Initial state |
| 1 | C、D | All value | 1.13In | t≤1h | Non tripping | Cold |
| 2 | C、D | All value | 1.45In | t＜1h | Tripping | After the last test |
| 3 | C、D | ≤32 | 2.55In | s＜t＜60s | Tripping | Cold |
| ＞32 | 1s＜t＜120s | |||||
| 4 | C | All value | 5In | t≤0.1s | Non tripping | Cold |
| 10In | ||||||
| 5 | C | All value | 10In | t≤0.1s | Tripping | Cold |
| Trip type | Rated current (A) | Rated short – circuit breaking capacity A | COSΦ |
| C、D | 6≤In≤63 | 6000 | 0.75~0.80 |
Mechanical and electrical life: the circuit breakers make and break the rated current in the rated voltage, power factor is 0.85 ~ 0.9, frequency test of operating cycle 120 times(> 32A) or 240 times(≤ 32A) per hour, of which mechanical and electrical life is 4000 times.
Product detail pictures:
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