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High Power Factor Motors

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Introduction

**PT100/RTD sensors** provide the highest level of thermal monitoring for critical motors. A PT100 measures resistance, which changes linearly with temperature, allowing a controller to read the temperature with high accuracy (typically $\pm 0.3^{\circ}\text{C}$). For hazardous area applications, thermal protection is paramount, as motor overheating can lead to ignition (breaching the T-Class). Our motors are fitted with PT100s in the windings and bearings, offering a continuous, analog signal that allows for precise alarm and trip settings, crucial for preventing catastrophic failure and maintaining Ex safety integrity.

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Why choose us?

Application Industries

  • High Voltage Motors (MV/HV): Mandatory monitoring due to high power and high cost of replacement.

  • VFD-Driven Motors: Essential for monitoring winding temperature, especially during low-speed, high-torque operation.

  • Explosion-proof Motors (Zone 1/2): Critical for maintaining the required T-Class max surface temperature limit.

  • Continuous Critical Process: Motors driving core process units in chemical and refinery plants.

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Key Specifications

Parameter Detail
**Sensor Type** PT100 (Platinum Resistance Thermometer, $100 \Omega$ at $0^{\circ}\text{C}$)
**Location** Stator Windings (3 or 6 elements) and/or Bearings (2 elements)
**Connection** 3-Wire or 4-Wire configuration for maximum accuracy
**Compliance** Required by IEC 60079 and NEMA standards for certain Ex/High Voltage motors
**Output** Analog signal (resistance change) read by an external protection relay

Hardcore Parameters

Key Advantages

  • **High Accuracy:** Provides a precise and reliable temperature reading, enabling proactive maintenance.

  • **Predictive Maintenance:** Allows for setting alarm thresholds before the critical trip point, enabling planned shutdowns.

  • **Ex Compliance:** The most reliable way to monitor and guarantee T-Class safety limits in hazardous areas.

  • **Superior Monitoring:** Can be integrated seamlessly into the facility's DCS (Distributed Control System) or PLC.

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  • **Wiring Diagrams:** Detailed connection schematics provided for integration with the client's thermal relay protection system.

  • **Calibration:** Sensors are factory-tested and calibrated to ensure compliance with the specified temperature curve.

  • **Accessory:** External junction boxes for sensor wiring are often included for clean installation.

Frequently Asked Questions

Frequently Asked Questions

  • Q: How do PT100s differ from Thermistors (PTC)?
  • A: PT100s offer a continuous, analog signal for precise temperature reading and monitoring. Thermistors (PTC) are binary (ON/OFF), triggering a trip at a single, fixed temperature point.
  • Q: Do all explosion-proof motors require PT100 protection?
  • A: Not all, but they are highly recommended for Ex motors run by VFDs or in Zone 1/Division 1 applications where precise T-Class monitoring is critical.
  • Q: Where are the PT100s usually placed in the windings?
  • A: Typically, three PT100s are placed between the phase coils (one per phase) in the stator slots to monitor the highest winding temperature areas.
About

Who we are

Shanghai Pinxing Explosion-proof Motor Co., Ltd. is a high-tech enterprise specializing in the design, research and development, manufacturing, and service of motors and motor control products.

Shanghai Pinxing is a AAA manufacturer of electrical equipment in China, specializing in the production of more than 1000 varieties of large and medium-sized high- voltage flameproof and increased safety explosion-proof motors, large and medium-sized high-voltage AC motors (including asynchronous, synchronous, frequency conversion and wound rotor motors), various types of small& medium-sized low-voltage explosion-proof motors, AC motors and so on. As a China High Power Factor Motors Suppliers and Custom High Power Factor Motors Company, Our products are exported to more than 40 countries and regions at home and abroad which are widely used in the fields of coal mining, metallurgy, cement, paper making, environmental protection, petroleum, chemical, textile, road traffic , water conservancy, power, shipbuilding and other factories and enterprises. We are moving towards energy conservation, efficiency, environmental protection, integrated automation and internationalization. Shanghai Pinxing Explosion-proof Motor Co., Ltd aims to provide good motor products and motor technology solutions for global industrial enterprises and various fields, and make "Pinxing"motor become the motor technology solution provider and motor manufacturer in the global motor industry.

Pinxing.

Shanghai Pinxing Explosion-proof Motor Co., Ltd. Shanghai Pinxing Explosion-proof Motor Co., Ltd.
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