Motor Protection Sensor

Features

  • Provides economical and reliable protection for 3-phase motors
  • Sharp increase in resistance near trip temperature
  • Wide trip temperature range from 85°C to 135°C
  • Rugged design for installation during motor manufacturing
  • Directly senses motor winding temperature
  • Rapid response to changes in temperature
  • No field adjustment required
  • Designed to work with TI® 40/41/42AA Series Electronic Motor Protection modules

Options

  • Wire length and color
  • Trip temperature

Description

Measurement Specialties' PTC Motor Protection Sensors are designed to provide economic and reliable overtemperature protection for three-phase motors. This assembly utilizes a small PTC disk that has a low base resistance. Once the motor winding temperature reaches the trip temperature of the PTC thermistor, its resistance increases several orders of magnitude for a small increase in temperature. This sharp increase in resistance is easily recognized buy the motor protection module or other electronics and can be used to shut down the system before any damage occurs.

Because the PTC assemblies are very small and rugged, they can be located in compact locations where protection is needed, such as directly inside the motor windings and can withstand standard varnish dip and bake operations and other handling.

A number of sensors can be connected in series to cover a larger area. If any of the assemblies see an overtemperature condition, it will increase in resistance and indicate a fault condition.

CustomizeThis Sensor! Motor Protection Sensor Motor Protection Sensor PTC Motor Protection Sensor Datasheet (142K) Create a Custom PTC Motor Protection
Sensor Solution
Motor Protection Sensor Product Information
Part Number T TRIP(°C) Wire Color Customize
Solution
P1005A085R153A 85 White/White Customize and configure your PTC Motor Protection Sensor Solution
P1005A095R153A 95 White/Black Customize and configure your PTC Motor Protection Sensor Solution
P1005A105R153A 105 White/Red Customize and configure your PTC Motor Protection Sensor Solution
P1005A115R153A 115 Black/Black Customize and configure your PTC Motor Protection Sensor Solution
P1005A125R153A 125 Black/Red Customize and configure your PTC Motor Protection Sensor Solution
P1005A135R153A 135 Red/Red Customize and configure your PTC Motor Protection Sensor Solution
R25 = 500 - 2500Ω
R (trip) = 1400Ω @ T TRIP ±5°C
Wire is AWG#22, Teflon insulated
The information on this website has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for inaccuracies. Furthermore, this information does not convey to the purchaser of such devices any license under the patent rights to the manufacturer. Measurement Specialties, Inc. reserves the right to make changes without further notice to any product herein. Measurement Specialties, Inc. makes no warranty, representation or guarantee regarding the suitability of its product for any particular purpose, nor does Measurement Specialties, Inc. assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability, including without limitation consequential or incidental damages. Typical parameters can and do vary in different applications. All operating parameters must be validated for each customer application by customer's technical experts. Measurement Specialties, Inc. does not convey any license under its patent rights nor the rights of others.