Renewable Design for Miniature Circuit Breaker FTB1 Wholesale to belarus
Exterior and dimensions
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|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
Common Enclosure for 3P and 4P MCCBs, with Generous space for cable termination, having In-built neutral Link for TPN system and providing IK08 and IP30 Protection.
Mounting holes for easy wall mounting, along with Louvers for better heat dissipation.Effortless Installation
Size I suitable up to 125A MCCBs and Size II suitable from 160A to 250A MCCBs.
A truly lavish home for your MCCB
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Central Mississippi Home Inspections, LLC has over 18 years experience and has inspected thousands of houses from new construction to 100+ year old historic homes. We are “Problem Solvers Not Deal Breakers” We are located in Jackson, MS which is located in the central part of the state. We do cover all of the Jackson metro including Madison, Ridgeland, Clinton, Brandon, Flowood, Pearl, Richland, Florence, Canton, Edwards and Raymond.
Central Mississippi Home Inspections, LLC
P.O. Box 16491
Jackson, MS 39236
(601)977-0720 fax 957-3853