The Parameters
| Type | Bimetal Thermal Protector |
| Product Name | 170C 175C 180C 185C 190C 195C Automatic Reset Normally Close Normal
Opened BW Series Motor Thermal Protector |
| Rated Current | 10A |
| Rated Voltage | 250V AC |
| Action/Reset Temperature | 45℃ to 250℃/40℃ to 220℃ |
| Cable Length | Mormal 70MM or Customized |
| Reset Type | Automatic Reset |
| Contact Type | Normal Open/Nomal Closed |
| Case | Metal Case |
| Lifespan | 10000 times |
| Electric Intensity | >800V |
| Contact Resistance | <30m ohms |
| Insulation Resistance | >100M ohms |
| Response Speed | Less than or equal to 1℃/Min |
Principle and characteristics
The BW-type thermal protector is made up of a disk-shaped and high
sensitive bimetallic element, a traveling contact, a statics
contact, a ledger plate,a shell,heat-resistant wires etc. When the
protector works,the bimetallic element is free and unlocked , the
traveling contact and the statics contact closes,the main circuit
is in conducting state.If the protector gives out heat for some
reason, the temperature will rise up and as if it gets to the
rating action temperature,the bimetalic element will react rapidly
because of the inner stress for the heat,which can promote the
traveling contact so as to disconnect the contact and cut off the
power supply to have a protective effect. When the temperature
drops to the rating reset temperature,the bimetallic element
returns to the initial state, the traveling contacts close,the
protector recovers to work and loops in this way. The product has
the advantages:very little resistance,temperature-sensing,acted
quicky,Safe and reliable,small, light etc.
Model Number Explain
BW-A: The metals outer shell type product.
BW-B: The plastics outer shell type product.
The metals outer shell type the product outer shell take an
electricity, should add to insulate a coat.
Technical Parmeters
| Action temperature | Reset temperature | | Action temperature | Reset temperature |
| 45±5℃ | 40±6℃ | 150±5℃ | 120±15℃ |
| 50±5℃ | 43±6℃ | 155±5℃ | 125±15℃ |
| 55±5℃ | 45±6℃ | 160±5℃ | 130±15℃ |
| 60±5℃ | 50±10℃ | 165±5℃ | 135±15℃ |
| 65±5℃ | 50±10℃ | 170±5℃ | 140±15℃ |
| 70±5℃ | 50±10℃ | 175±5℃ | 145±15℃ |
| 75±5℃ | 55±10℃ | 180±5℃ | 150±15℃ |
| 80±5℃ | 55±10℃ | 185±5℃ | 155±15℃ |
| 85±5℃ | 55±10℃ | 190±5℃ | 160±15℃ |
| 90±5℃ | 60±10℃ | 195±5℃ | 165±15℃ |
| 95±5℃ | 65±10℃ | 200±5℃ | 170±15℃ |
| 100±5℃ | 75±10℃ | 205±5℃ | 175±15℃ |
| 105±5℃ | 80±15℃ | 210±5℃ | 180±15℃ |
| 110±5℃ | 80±15℃ | 215±5℃ | 185±15℃ |
| 115±5℃ | 85±15℃ | 220±5℃ | 190±15℃ |
| 120±5℃ | 90±15℃ | 225±5℃ | 195±15℃ |
| 125±5℃ | 95±15℃ | 230±5℃ | 200±15℃ |
| 130±5℃ | 100±15℃ | | 235±5℃ | 205±15℃ |
| 135±5℃ | 105±15℃ | | 240±5℃ | 210±15℃ |
| 140±5℃ | 110±15℃ | | 245±5℃ | 215±15℃ |
| 145±5℃ | 115±15℃ | | 250±5℃ | 220±15℃ |
| The specification can also be manufactured as request. |
Application
This porduct is widely used in washing machine motor,air
conditioner motor,dry washer motor,water pump motor,the electronic
ballast,voltage transformer,electric tools,microwave oven motor,
Ventilator motor,electronic component,electric heating electric
appliance etc.
Test Method
Sample is connected to the fixture of the equipment,and placed into
the test equipment (Hot current of air in the space of test should
be equipped with a stirrer and temperature is controllable).A
detect current about 10mA(no more than 100mA)is passed through the
sample and a thermometer is placed junction to the sample to
monitor the opening temperature .The temperature of the test
equipment is raised at the rate of 0.5~1℃ per minute until the
sample functioned.
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