Factory supplied Miniature Circuit Breaker FTB1 to Hamburg Factories
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
To purchase, visit: http://www.swgr.com/store/circuit-breakers/molded-case/product/NA361200,22-10239.aspx
Stock # 22-10239, SQUARE D, Circuit Breaker, Catalog No. NA361200, Frame Amps 1200, Trip Amps 1200, 3 Poles, 600 Volts
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MIDWEST Electrical Testing & Maintenance Co., Inc.
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2000w Dc 24v Ac 220v 230v 240v Converter Pure Sine Wave Power Inverter With Charger 35a, Lcd Remote Control General specification: Model:sg-20002c Nominal Power:2000w Peak Power:6000w Output Waveform:pure wave/same as input(bypass mode) Ac output: Ac220v/230v/240v(optional) Efficiency:88%(peak) Line Efficiency:95% Factor:0.9-1.0 Voltage rms : 230vac Frequency: 50hz 0.3hz Short Circuit Protection: Yes(10s after fault) specification/input: Voltage: Minimum Start Low Battery Alarm: 21v Trip: High 32v Recover: 26v Ac charger: Range:194-243vac/164-243vac(w) Rate: Initial for Up:0-15.7v for 12v(*2 for 24v, *4 for 48v) Shutdown:15.7v for for *4 for Control:yes By & Waveform:sine (grid or Voltage:230vac Max.
Ac :270vac Frequency:50hz Re-engage:48hz for 50hz, Re-engage:54hz for Overload Protection:circuit breaker Transfer Switch Rating : 30amp Without Connected: Current: 35amp: Size and Weight: Dimensions(l*w*h): 442*218*179mm 23kg Display: Leds+lcd