Construction and Function
demoMCCB

  1. GRID UNIT:
  2.   The arc generated between contact is extended, it divides and cools, and current is intercepted certainly.

  3. CONTACT:
  4.   It consists of a fixed contact and a movable point of contact, and "ON" and "OFF" of the electricity are carried out.

  5. SWITCHING MECHANISM:
  6.   The mechanism in which each pole opens and closes contact simultaneously.

  7. BASE AND COVER:
  8.   The synthetic resin cast which has the intensity and heat resistance which bear the internal pressure of interception, and arc-proof is used.

  9. TERMINAL:
  10.   It is the portion which connects external conductor.

  11. OVERLOAD TRIP DEVICE:
  12.   Overload current and earth leakage current are detected, and a breaker style is operated. There are Fully Magnetic (Hydr- aulic Magnetic), Thermal Magnetic, and Electronically controlled in a princi- ple of operation.

  13. HANDLE:
  14.   It is equipment which performs opening-and-closing operation.

  15. TRIP BUTTON:
  16.   It is the button which trips a breaker from the exterior mec- hanically. (There are some which are not attached in a product in part.)