Panasonic Corporation Electromechanical Control Business Division

industrial.panasonic.com/ac/e/

Technical Terminology & Cautions for Use (Detection Switches)

Panasonic Corporation 2021

AECTB36E 202110

TECHNICAL TERMINOLOGY

■ Definition of operating characteristic

The main terminological illustrations and

meanings which are used with snapaction

switches are as follows.

Center of mounting holes

FP

OF

RF

TT

MD

OT

TTP

OP

PT

TF

RP

Classification Terminology Symbol

Unit

Varying

display

method

Starting current

Force

Operating

Force

OF

N

Max.

The force required to cause contact

snap-action. It is expressed terms of force

applied to the the actuator.

Release

Force

RF

N

Min.

The force to be applied to the the actuator

at the moment contact snaps back from

operated position to total travel position.

Totaltravel

Force

TF

N

Force applied to an actuator required to

move from an operating position to a total

travel position

Movement

Pretravel

PT

mm,

degree

Max.

Distance or agree of the actuator movement

from free position to operating position.

Overtravel

OT

mm,

degree

Min.

The distance or degree which the actuator

is permitted to travel after actuation without

any damage to the switching mechanism.

Movement

Differential

MD

mm,

degree

Max.

The distance or degree from operating

position to release position of the actuator.

Totaltravel

TT

mm,

degree

The migration length or the move angle

from the free position to total travel position

of actuator

Position

Free Position

FP

mm,

degree

Position of the actuator when no force is

applied to.

Operating

Position

OP

mm,

degree

±

The position of the actuator when the

traveling contacts snaps with the fixed

contact.

Release

Position

RP

mm,

degree

The position of the actuator when the

traveling contact snaps back from operating

position to its original position.

Total travel

Position

TTP

mm,

degree

The stopping position of the actuator after

total travel.

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