Brochure

Table Of Contents

Adsorption charge

Bellows

Capillary tube

Sensor

that have been created as the result of cut-in action. These design features ensure that the cut-out point of the KP

switch remains very accurate and completely independent of the magnitude of the current load.

FLA - Motor Full Load Amperes

FLA is the largest current that a motor or other device is designed to carry at rated voltage and other specic

conditions. Also often called current at rated conditions.

LRA - Locked Rotor Amperes

LRA is the current in amperes drawn by an electric motor with the shaft or rotor immobilized.

Thermostats

Dierential

The dierential is the dierence between the cut-in and cut-out temperatures.

The dierential is necessary for satisfactory automatic operation of the controlled system. Mechanical dierential

(intrinsic dierential). The mechanical dierential is the dierential set by the dierential spindle.

Reset:

Manual reset: Units with manual reset can only be restarted after activation of the reset button. On max reset

units the set value is equal to cut-out value for rising temperature.

Automatic reset: Units with automatic reset is restored to operational mode automatically.

Snap function

A specic contact force is maintained until snap is initiated. The time over which contact force reaches zero is a few

milliseconds; therefore, contact bounce cannot occur as a result, for example, of slight vibrations before cut-out. The

snap-action contact system will continue to function even when micro-welds are created between the contacts

during cut-in. The force created to separate the contacts is strong, and instantly shears o all contact surface welds

that have been created as the result of cut-in action. These design features ensure that the cut-out point of the KP

switch remains very accurate and completely independent of the magnitude of the current load.

FLA - Motor Full Load Amperes

FLA is the largest current that a motor or other device is designed to carry at rated voltage and other specic

conditions. Also often called current at rated conditions.

LRA - Locked Rotor Amperes

LRA is the current in amperes drawn by an electric motor with the shaft or rotor immobilized.

Thermostat charge

Figure 1: Thermostat charge

Sensors with adsorption charges contain a superheated gas together with a solid having a large adsorption surface.

The sensor can be placed in zones that are warmer or colder than the switch housing and capillary tube, but

variations of more than 70 °F may inuence scale accuracy.

Pressure switches and thermostats, Type KP