10 Years Factory Miniature Circuit Breaker FTB1 Wholesale to Zambia
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
Made in the USA
The Larson Electronics MDC-240-100MB-8X120 Mobile Distribution System steps down 240 VAC electrical current to 120V AC 60hz. This power distribution system provides operators the ability to safely tap into commonly found 240VAC power from a variety of sources including generators and direct grid power. This portable spiderbox is suitable for outdoor applications.
The MDC-240-100MB-8X120 temporary power distribution system provides a safe and reliable way for operators in industrial settings to tap into and utilize power sources independently of the work area. This unit provides an effective power distribution system for operators performing plant turnarounds, maintenance and cleaning in hazardous areas, equipment installations and repairs, and any activities requiring an alternative to native power sources. This portable transformer is designed to operate with 240V 60hz which it then steps down to 120 VAC. The power distribution system on this portable substation makes 120VAC available via eight 20A, 120V GFCI protected 5-20 duplex receptacles with weatherproof covers.
10′ of #6/4 Type-W line in power cord is included to connect the substation to a primary 240V primary power supply. This power distribution system conforms to UL 508A.
The main load center is protected by a 100 amp load center with main breaker for circuit protection. 120V line out protection is provided by eight 20amp, 125 Volt, 1 pole breakers. Connection for 120V is through receptacles mounted on the side of the load center. Receptacles include eight 5-20 120v, GFCI waterproof duplex receptacles. The load center is mounted within NEMA 3R enclosure.
The transformer and load center/distribution assembly is mounted to a standard upright steel dolly cart style frame resulting in an extremely stable, durable, and mobile power distribution platform. Two run-flat tires and a cart style mounting platform provides easier substation mobility. This temporary power distribution solution can be modified to meet the needs of job-site receptacle requirements. Units are available up to 150kva, and can be equipped with skids or trailer mounted.
This power distribution system is NEMA 3R rated and ideal for indoor/outdoor use and applications including but not limited to; construction sites, plant maintenance, plant turnarounds, hazardous location operations, shows, exhibits, and shipyard operations.
Larson Electronics is a manufacturer and can build portable transformer systems to your specifications. Although we carry several models of power distribution systems, we can deliver custom ordered units almost as quickly as our prebuilt units. If this model does not meet your needs, please contact us at 1-800-369-6671 or email@example.com to discuss your specific requirements.