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2. CONTACTOR
2-1 STRUCTURE AND OPERATION
2-1-1 Standard Type Contactor
(1) Structure
The contactor is roughly composed of the following 3 parts.
(a) Part of contact: Part through which a current passes, and at which a circuit is opened and closed.
(b) Part of electromagnet: Part of power which moves the part of contact.
(c) Part of frame: An external frame housing the contact and the electromagnet to constitute a protective
(Case and cover) structure for improving the safety, such as insulation, etc.
Moreover, the structure consists of the horizontal plunger and the link structure types as shown in the following
table.
Table 4. Horizontal plunger and link structure
Outline Features Frame used
Horizontal plunger ･ Working directions of the moving ･ Simple structure
contact and moving core are 8C ～ 250C
horizontal.
Link structure ･ Movement of the moving contact ･ Light shock to
is horizontal. mounting board . 300C ～ 600C
･ Movement of the moving core is ･ Compact and
vertical. light weight.
The exploded view of H35 as an example of the horizontal plunger type, and that of H300C as an example of
the link structure are shown in Fig. 1 and Fig. 2, respectively.
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