Factory made hot-sale Miniature Circuit Breaker FTB1 to Gabon Factory


Technical data

Product illustration

Tripping characteristic

Exterior and dimensions

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Product illustration:



 Auxiliary contact Auxiliary contact and alarm contact  Shunt release Shunt release and auxiliary contact  Under voltage release  Over voltage release  Busbar mounting base  Motor-driven operation


Product Features

Under normal condition, the working principle of main thermostic bimetal in FTB1 SMCB is the same to the usual circuit breakers, it is used for overload tripping. when there is a short-circuit on a branch circuit breaker, the magnet core in the main current path would tilt the moving contact away from the fixed contact to break the circuit,thus producing the electric arc, and limiting the short-circuit current effectively.

In the maintime,the short-circuit current flow to the supplementary current path, a selective resistor and a selective bimetal are connected in series of the supplementary curret path, limiting the short-circuit current to a few hundred amps.

When the downstream circuit-breaker has tripped because of a short-circuit, the contact tips reclose automatically through a simple spring-type system,ensuring other unaffected branch circuits continue in operation.If a short-circuit occur between the FTB1 and the downstream circuit-breaker, another bimetal release enables short-time delayed tripping,ensuring the contact tips remain in the open position enabling isolating.


Scope of use

It is primarily used in critical installations,for instance, office buiding, laboratory, theatre, museum, hotel, shopping mall, telecommunication, coal mine and shipping, chemical industry and metallurgy, industrial plants,medical and health care, bank and securities exchange,airport, underground express way, military establishment and similar loads that requires non-interrupted and reliable power supply.

Technical Data

Model FTB1-100
Number of poles  ada
Rated frequency: AC 50(60)Hz
Rated voltage (V) AC 230/400
Rated current (A) 20, 25, 32, 40, 50, 63,80,100
Breaking capacity  Icn/Ics(KA) LH 15/7.525/12.5
Rated impulse withstand voltage (kV) 6
Tripping characteristic E
Electric arc distance(mm) ≤35
Mechanical life 10,000
Insulation function yes
Pollution degree
Ambient temperature (°C) -5°C ~ +40°C
Altitude (m) Not higher than 2000m
Installation Mounted on DIN rail, busbar adaptor or by screw terminal
Connection capacity: Connection to cables,busbars or terminals
Weight (g) 313      617       932       1241


 Trippping behavior


Test Tripping characteristic Conventional non-tripping current Conventional tripping current Initial status Tripping time
a b E E 1.05In 1.2In Cold statusRight after test 1 ≧2h﹤2h
Test Tripping characteristic Delayed tripping current short-time delayed tripping current Initial status Tripping time
c E 5In   Cold status 0.05s<t<5s(In≦32A)   0.05s<t<10s(In>32A)
d E   6.25In Cold status 0.01s﹤t﹤0.3s

Coordination table

The FTB1 series operates selectively with respect to the combination with MCBs

MCB(B,C characteristic) FTB1(Characteristic E)
In A 20 25 32 40 50 63 80 100
10 T T T T T T T T
16 T T T T T T T
20 T T T T T T
25 T T T T T
32 T T T T
40 T T T
50 T T
63 T

Note: T represents total selectivity



Tripping characteristic

adfa (3)

Exterior and dimensions

adfa (4)


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If you don’t have a Twitter account it is pretty easy and free to set up.

I hope you enjoyed the new spinner design! I will be posting more videos soon. I am going try to do around one video a week. I would post more but working and going to college takes up most of my time. I love this hobby and I will be posting videos whenever I can!

Tool List:
-Chain Breaker (Or a hammer and a center punch can also be used): https://www.amazon.com/TOOGOO-Bicycle-Breaker-Spliter-Repairing/dp/B008S8PSDA/ref=sr_1_5?ie=UTF8&qid=1490001275&sr=8-5&keywords=chain+breaker+bicycle

Material List:
-1/2″ x 3/32″ Bike Chain: You should try getting a used bike chain from your local bike store.
—-The one I used is the Z51 or Z50 KMC Chain: https://www.amazon.com/KMC-Bicycle-6-7-Speed-32-Inch-Silver/dp/B001CN6QAC/ref=sr_1_3?ie=UTF8&qid=1490476584&sr=8-3&keywords=3%2F32+chain
—-Neo Chrome chain(cool!): http://www.ebay.com/itm/KMC-Z610HX-Bike-Chain-3-32-7-8mm-Single-Speed-BMX-Fixed-Oil-Slick-Neo-Chrome-/222064257591?hash=item33b40faa37:g:SfMAAOSwLpdW9KN0
—-Not painted chain(For heat anodizing):https://www.amazon.com/KMC-Bicycle-Chain-Speed-32-Inch/dp/B000AOA3PS/ref=sr_1_5?ie=UTF8&qid=1490477468&sr=8-5&keywords=bike+chain+3%2F32+kmc
—-Silver chain:https://www.amazon.com/KMC-X8-99-Bicycle-32-Inch-Silver/dp/B0013BV540/ref=sr_1_1?ie=UTF8&qid=1490478049&sr=8-1&keywords=3%2F32+chain+KMC
-Two Zip-ties (no more than 2.4mm or 3/32″ Wide): I got the bag zipties at the 99 cent store for a dollar
-Skateboard Bearing (608 bearing):
—-Normal Skate Bearing: http://www.ebay.com/itm/152263757596?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
—-Hybrid Bearing: http://www.ebay.com/itm/Pack-of-8-Hybrid-Ceramic-Skateboard-Ball-Bearing-608RS-Zirconia-ZrO2-White-Balls-/401296988203?hash=item5d6f2a182b:g:uVkAAOSwuTxV-IvD
—-Full Ceramic Bearing: http://www.ebay.com/itm/Full-Ceramic-608-8x22x7-Miniature-Ball-Bearings-ZrO2-Zirconia-White-Premium-/131993540079?hash=item1ebb6d95ef:m:mu8IKqJJ0UoMLxJ1RlGGs0g
-Adhesive (optional: in my opinion glueing the bearing isn’t necessary)
-Buttons (optional): http://www.ebay.com/itm/Stainless-Steel-metal-Fidget-Toy-Thumb-Button-Cap-For-608-hand-Spinner-Bearing-/322447954840?var=&hash=item4b13655398:m:mSSQFZBzVVZLMSSNqWTXnfg
—-You can also use nuts and bolts like I described in the video 3:59

Thank you for watching!


Music References:

To be Happy by Joey Pecoraro https://soundcloud.com/joeypecoraro
Creative Commons — Attribution 3.0 Unported— CC BY 3.0


Music provided by Music for Creators https://youtu.be/sINsl5NhITs


Instrumental produced by Chuki


I had to strip 5 or more kilos of useless metal off it to get it to be a lightweight BLATin’ machine..Other cyclists and people walking look surprised when you pass them at 15+ mph up a steep hill… So far I rode it 17 miles pedaling ‘when i feel like it’ and ‘when its necessary’. I mainly use it as a ‘get you going’ system then turn it off, you can hear the motor get really quiet when youre going fast.. It even seems to slow you down when you apply the power when really going fast downhill.. The pack was still charged to 38.2 v (12.73 for each yuasa 12v sla battery) so I reckon it still had quite a lot of range.. Im going to increase the distance each trip… PEACE

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