I. Product Usage 

DFF1 series auxiliary switch is a kind of new switch produced by our plant in accordance with foreign advanced technology used for control, signal, interlock, other usages of switch equipment and control equipment.

II. Product Structure and Performance Characteristics of DFF1 Auxiliary Switch 

Composed by dual-breaker contact head components with 5 modal points and 2 terminals for 3 open and 2 closed or 2 open and 3 closed, the auxiliary switch enjoys its flexible operation, and safe, reliable contact. The pressure among contract heads shall be produced by individual compressed spring making the axis of rotation rotate 90° through external force for interconversion between closure and disjunction with an eye-catching serial number at the top of insulation parts of each return loop.

III. Usage Environment and Installation Conditions of DFF1 Auxiliary Switch

1.With an altitude less than 3,000 meters; 

2.With an environment temperature of -40℃~+40℃; 

3.RH: When the maximum temperature reaches to +40℃, the relative air humidity should not be over 50%, but higher relative humidity is allowed at lower temperature.   

4.With an installation category (over-voltage category) of II (load level).

5.With a surrounding medium without explosion hazard, fire, dust, destructive insulation or a place where is sufficient to corrode metallic gases.

IV. Specification Model and Parameters

 Meaning of model 

Design No.

Code of auxiliary switch: The first capital Chinese phonetic alphabet of “Fu”

Essential parameter

Works code

V. Overall Size and Installation Dimension of Auxiliary Switch

 As shown in The Overall Size and Installation Dimension of Auxiliary Switch

 Assembly Diagram of DFF1 Auxiliary Switch

 Single DFF1 Auxiliary Switch

Single DFF1 Auxiliary Switch with Small Bracket