RDB8A-63 miniature circuit breaker (hereinafter referred to as circuit breaker), mainly used in the protection distribution lines with AC 50Hz, rated working voltage not exceeding 400V, rated current not exceeding 63A, and rated short-circuit breaking capacity not exceeding 6000A; it can also be applied to DC voltage unipolar not exceeding 110V, two poles not exceeding 220V, rated DC current not exceeding 63A, rated DC short-circuit breaking capacity not exceeding 6000A in protective distribution lines; used for infrequent connection, breaking and switching of lines, with overload , Short circuit protection function. At the same time, it has powerful auxiliary function modules, such as auxiliary contacts, contacts with alarm indication, shunt release, undervoltage release, remote trip control and other modules.
1.Process guaranteed performance
2.Small volume, large capacity
3.Super-strong wiring capacity
4.Good insulation between phases
5.Super-strong conductivity
6.Low temperature rise and power consumption
Main technical data
Overcurrent tripping characteristics: Under normal installation conditions and reference ambient temperature (30-35)°C
the overcurrent tripping characteristics of the circuit breaker meet the requirements in Table 1.
The rated short-circuit breaking capacity of the circuit breaker is shown in Table 2.
| Number | Trip type | Rated current In | AC experimental current | Appointed time | Expected outcome | lnitial state | |
| 1 | C | All values | 1.13In | t≥1h | No trip | Cold state | |
| 2 | C | All values | 1.45In | t<1h | Trip | lmmediately after serial | |
number 1 cools down3C≤32A2.55In1s<1h<60sCold state>32A1s<1h<120s4C≤32A5In7In0.1s≤t≤15sNotripCold state>32A0.1s≤t≤30s5CAll values10In15Int<0.1sTripCold state
| Trip type | Rated current A | Rated short circuit segment capacity | cosφ |
| C | 1≤In≤63 | 6000 | 0.75-0.80 |
Mechanical and electrical lfe:Under the specified rated voltage, the circuit breaker makes and breaks the rated current,the power factor is 0.85-0.9, and it is tested at the frequency of 120 (>32A) or 240 (>32A) operating cycles per hour. The mechanical and electrical life is 4000 times.
