12 Years Factory Miniature circuit breaker-FTB3 for belarus Factory
Exterior and dimensions
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- A breaking capacity of 12kA up to 32A and 10kA between 40 to 63A.
- Current-limiting scheme: in the event of a short circuit, are able to limit the let-through current to 60%-70% of the rated current.
- The trip mechanism ensures perfect closure every time,thereby considerably improving the performance of these devices and extending their average lifetime.
-The arc extinguishing system: allows the short-circuit currents of very high value to be interrupted extremely rapidly, the remarkable opening speed of contacts opening and the structure of the arcing chamber contribute to extinguishing the arc in the shortest possible time, ensuring reliable protection of short-circuit.
- The internal contact position allows an exact information of the circuit-breaker status: “green”,open contacts;“red”,closed contacts,independently of the toggle position.
- Sealing/locking sealable with 1 mm wire, to prevent unwanted tripping.
- The supply lines of the protected circuit can be connected to either the upper or lower terminals of the circuit-breakers(reversibility of connections).
- The double terminal of these circuit-breakers enables simultaneous connection of cables and busbars.
|Mechanical and electrical life:||20,000 operation|
|Installation||On symmetrical DIN rail 35mm /Panel Mounting|
|Connection capacity:||Cross-section of conductors up to 25mm², Cross-section of busbar from 0.8-2mm², reversibility of connections|
|Ambient temperature (°C)||-5°C ~ +40°C|
|Altitude (m)||not higher than 2000m|
|Relative air humidity||no more than 95%|
|Weight (g)||116||234 352 472|
Exterior and dimensions
Number of poles
Please refer to below table for the connection of wires with a cross section area
|Rated current In(A)||Nominal cross section area of copper wire(mm²)|
This video shows you how to locate and replace the fuse inside a fan. In some fans, the fuse is hidden inside one of the short fiberglass sleeves (gold color bundle in the picture) that cover the connections between the motor windings and the control wires. There is only one fuse but you will need to move cut the string and gently slide each sleeve until you find the small (grain of rice size) fuse. . What follows is informative feedback from a viewer with precise terminology for the circuit elements of interest.
Joshua Prince commented on a video on YouTube.
Shared publicly – 5:55 AM
Actually, clarification. The black square component you refer to at the start is not quite a fuse, as it wont trip off from over current. There really exists no fuse component in AC powered devices, but instead, are circuit breaker switches. Fuses are more common in DC devices. Not all devices, but some will have breakers, or also known as OVP switches (over voltage protection).
How can u tell if thermal switch??? From the way its placed. If you notice see how its tied against the coil directly?? Thats for a reason. Its a thermal safety relay/switch. It gets tripped off when the coil gets extreme hot, to prevent the coil catching on fire.. And usually the thermal switch has been set off, breaking the circuit and coils get no power. Direct contact, and heat transfers inductively. Now it has to be replaced with same rated replacement. Brand makes no differenc3. Just rating. And then fan bearings both front and rear bearings need lube, and if excess dust, cleaning. Which usually is why heated up firstly. Dust and worn dry bearings bottleneck the coils.
Once again to clarify its a thermal switch, not a fuse, or as i mentioned circuit breaker, which usually can be found on outdoor use AC current powered devices, such as air compressors, heat lamps, higher wattage lighting systems. So little black square component is an thermal switch. Usually rated around 115-120°f on 110-115v AC. Its the same in sense of an OVP Circuit breaker switch, where if the current exceeds the max rating allowed, it will trip it to the off position. In this case, if the coils on the stater gets too hot, or reaches max allowed.