Threshold value switch is a simple temperature control of the action histerezowym. It can be used as a stand-alone unit (it has a built-in relay) or control additional switching elements - contactors.

Switch threshold can be used as histerezowy the temperature control process is not required where high accuracy temperature control.

A typical application circuit is a function of the additional thermal protection devices, such as baking ovens.

Threshold switch is produced in two versions: auto and manual.

The auto version of the relay is switched when the set temperature threshold, and the return of the relay contact switch occurs when the temperature drops below the set threshold for the hysteresis.

The manual version is the inclusion of the controller by pressing a button connected to the terminals of the controller. After reaching the set temperature control is turned off. Reconnection is done by pressing the key.

 
WP is performed in two temperature ranges:

• 0-300 ° C and 300-500 ° C, other ranges on request.
• Hysteresis is typically 5 ° C.
• It is adapted for PT100 sensors.

The controller is powered directly from the mains 220V, 50Hz, other power option.

It has a built-in relay changeover.
The contact can switch 5A current (resistive load) and the voltage 220 VAC.

WP is installed in a typical rail housing with dimensions of 35mm x 89mm.
Operation temperature range is from 0 to 60 ° C.
Settings are made potentiometer knob.

Versions of the controller:

• WP - auto
• WP - manual