Ironclad switch figure ( Enclosed type load switch) With the characteristics of selection

Ironclad switch, also known as closed-end load switch diagram is its shape and structure. It has installed in cast iron or steel plate shell inside the knife type contact and arc extinguishing system, fuse and operating mechanism, etc. It has the following characteristics: (compared with knife switch 1) Contact with arcing chamber ( Hood) , arc not squirt, can need not concern interphase short circuit accident will happen; ( 2) Fuse high breaking capacity, generally for 5 ka, the most can reach more than 50 ka. ( 3) Operating mechanism for energy storage closing type, and a mechanical interlock. The former can make the closing of the switch and brake speed has nothing to do with operation speed, thus improve the performance of actions on the switch and arcing performance; The latter to ensure the closing in a state of play is not out of the box cover and the box lid before closing completed brake, improves security; ( 4) Have a strong closed shell, can protect the operator from arc burns. Ironclad switch HH3, HH3, HH10, HH11 series, such as the selection of rated current from 10 a to 400 a, including 60 a and total pressure of the following can be used for asynchronous motor starting control switch. Switch with iron shell control electrical heating and lighting circuit, can choose according to the rated current of the circuit. Used to control the asynchronous motor, as a result of the switch on and off capacity of 4, ie the motor starting current is in full pressure ( 4 ~ 7) More than rated current, so the rated current of the switch should be rated current of the motor 1. More than 5 times.