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KW4T Series Diamond Thermal Protector
KW4T Series Diamond Thermal Protector

KW4T Series Diamond Thermal Protector

The temperature protector with metal casing is a miniature product developed by our company
Rhombus structure, small size, easy to install
Motor thermal protector/thermal circuit breaker
No flicker, precise working temperature
Small thermal protector with metal shell
Realize stable, reliable and long service life with non-current-carrying device design
Product Detail

Diamond Thermal Protector


Product Overview

  • The temperature protector with metal casing is a miniature product developed by our company

  • Rhombus structure, small size, easy to install

  • Motor thermal protector/thermal circuit breaker

  • No flicker, precise working temperature

  • Small thermal protector with metal shell

  • Realize stable, reliable and long service life with non-current-carrying device design


Design Principle

The structure design is simple, consisting of strip-shaped high-sensitivity bimetallic elements, moving contacts, static contacts, screws, cover plates, etc. The bimetal element is placed on the bottom shell, the moving contact and the static contact are closed, and the circuit is conducted. When the electrical appliance heats up for some reason, and the temperature rises to the rated operating temperature of the product, the bimetallic element is heated to produce internal stress and act quickly, disconnecting the contact, cutting off the power supply, and stopping the electrical appliance, thus playing a protective role against overheating. When the temperature of the protected electrical appliance drops to the product's rated reset temperature value, the bimetal element returns to its original state. The moving and static contacts are closed, and the electrical appliance resumes operation. The protection function of the product can be divided into two types: normally open type and normally closed type, that is, when the temperature reaches the design value, the circuit is turned on and the circuit is turned off.


Due to the use of a metal shell, the protector has stronger mechanical strength and can be covered with an insulating sheath to insulate the metal parts of the motor.

Dimensions

电机热保护器系列-产品说明书_28_06.jpg

Temperature Specification

Operating Temperature

Reset Temperature

Operating Temperature

Reset Temperature

40±5℃

≥27℃

105±5℃

70±15℃

45±5℃

≥30℃

110±5℃

70±15℃

50±5℃

≥30℃

115±5℃

75±15℃

55±5℃

≥30℃

120±5℃

80±15℃

60±5℃

≥35℃

125±5℃

85±15℃

65±5℃

40±15℃

130±5℃

90±15℃

70±5℃

45±15℃

135±5℃

95±15℃

75±5℃

50±15℃

140±5℃

100±15℃

80±5℃

55±15℃

145±5℃

105±15℃

85±5℃

60±15℃

150±5℃

110±15℃

90±5℃

65±15℃

155±5℃

115±15℃

95±5℃

65±15℃

160±5℃

120±15℃

100±5℃

65±15℃

Special specifications according to customer requirements


Action temperature: 40~160℃±5℃, every 5℃, it is a temperature specification.

Reset temperature: 2/3 of the nominal operating temperature, with a tolerance of ±15°C, or made according to customer requirements.

Service life: The current can operate more than 10,000 times within the range of 6A.

Electrical Specifications

250V AC 3A;125V AC 6A;24V DC 6A;

Number Naming Reference

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Characteristic Curve

Approximate value is only used to select samples for certification test

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These curves are only used to provide guidance when choosing a protector for a specific application. Other factors should be considered when choosing a protector, such as the distance from the heat source and the installation method. The trip time depends on the terminal configuration and installation conditions.


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