10 Years Factory Miniature Circuit Breaker FTB1 to Germany Factories
Exterior and dimensions
Our company insists all along the quality policy of "product quality is base of enterprise survival; customer satisfaction is the staring point and ending of an enterprise; persistent improvement is eternal pursuit of staff" and the consistent purpose of "reputation first, customer first" for 10 Years Factory Miniature Circuit Breaker FTB1 to Germany Factories, We warmly welcome you to establish cooperation and create a bright future together with us
|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|
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.
|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)|
The FTB1 series operates selectively with respect to the combination with MCBs
|MCB(B,C characteristic) FTB1(Characteristic E)|
Note: T represents total selectivity
Exterior and dimensions
Go to http://www.southlandelectrical.com/itemdesc.asp?ic=HEB1B035-NS to shop online for this ITE Siemens HEB1B035, 35 Amp, 277 Volt, 1 Pole Circuit Breaker. Southland Electrical is a world class leader in Power Distribution and Low Voltage Motor Control. For over 30 years we have been buying and selling New, New Surplus and Reconditioned industrial electrical equipment.
This is an old Multi-Amp CB7140 breaker test set. The 71 means it was designed in 1971 and the 40 means it is capable of about 40,000 amperes short pulse. Probably only about 30 kA into a breaker with only about 8 VAC.
I originally retrofitted this test set in 1994 for a company in NJ, and I used a Samsung laptop computer and some proprietary PC boards to create a breaker testing system that ran under MSDOS and could save results into a database. It had several drawbacks and it was difficult to use and essentially unmaintainable because of the obsolete computer. It was sold or transferred several times before coming back for a more modern retrofit with the MAC-20.