Detailed Explanation of Motor Insulation Sensor Standard Specifications and Warrenson Electric's Compliance Application

During the operation of industrial motors, standardized insulation condition monitoring is a core aspect of ensuring equipment safety. Warrenson Electric's WRS-MTS2X low-voltage motor insulation sensor and WRS-MTS31 medium-voltage motor insulation sensor are both built on multi-dimensional standard-matching technology, establishing a fully compliant insulation monitoring system for motors of different voltage levels. The following analysis covers three dimensions: design, parameters, and functionality.

I. Design Principles: Accurate Matching of Measurement Methods and Standards

(1) Application of DC Injection Method in Low-Voltage Scenarios

The WRS-MTS2X uses a 500V DC injection method for insulation resistance measurement, fully complying with the technical requirements of GB/T 20160-2006 "Rotating Machinery Insulation Resistance Test." This method ensures the standardization of insulation resistance measurement results and the reliability of condition assessment by applying DC injection at specific voltages.

In terms of operational mechanisms, the sensor implements a full-cycle management approach of "monitoring power supply parameters during operation and automatically measuring insulation during shutdown." This aligns with the lifecycle monitoring provisions of GB/T 14711-2013 "General Safety Requirements for Small and Medium Rotating Motors," ensuring continuous and stable motor operation.

Workflow:

(2) Research on High-Voltage Coupling Technology in Medium-Voltage Scenarios

The WRS-MTS31, used in conjunction with the WRS-MTS3X high-voltage coupler, employs a 2500V DC injection method to test the main insulation of motors, ensuring compliance with the GB/T 20160-2006 standards for medium-voltage motor insulation testing. Its features of real-time voltage and current collection and automatic monitoring mode switching align with the safety concept of "real-time warning for abnormal conditions" in GB/T 14711-2013, enabling rapid identification of insulation hazards.

II. Technical Parameters: Rigorous Implementation from Multiple Indicators to Standards

(1) Standardized Design for Power Supply and Energy Efficiency

Power Supply Compatibility: Both sensors use an AC 85-265V 50Hz power supply, with the low-voltage model consuming <10W and the medium-voltage model <15W, complying with GB/T 11022-2020 "Common Technical Requirements for High-Voltage AC Switchgear." This ensures compatibility with conventional grid environments while maintaining low power consumption.

Measurement Accuracy:

The low-voltage model measures insulation resistance in the range of 1kΩ–999MΩ with an error ≤1%; the medium-voltage model has an error <3% in the 1MΩ–999MΩ range and <5% in the 1000MΩ–9999MΩ range, both meeting the accuracy requirements of GB/T 20160-2006.

(2) Standard Validation of Environmental Adaptability

Temperature Range: The low-voltage model operates at -25°C to 60°C, while the medium-voltage model operates at -20°C to 60°C (with storage temperature extended to -20°C to 75°C). Both have passed environmental tests such as GB/T 2423.1-2008 (low temperature) and GB/T 2423.2-2008 (high temperature), ensuring adaptability to complex industrial environments.

Humidity Requirements: Both models require relative humidity <95% (non-condensing), complying with the GB/T 2423.3-2016 "Damp Heat, Steady State" standard.

III. Functional Characteristics: Deep Integration of Intelligence and Standardization

(1) Compliance with Industrial Communication Protocols

Both sensors feature an RS-485 interface and Modbus protocol, meeting the requirements of GB/T 19582-2008 "Industrial Automation Network Specifications," and support seamless integration with PLC and SCADA systems. Some models also support 433MHz wireless communication, enhancing system deployment flexibility to meet the data exchange demands of smart factories.

(2) Comprehensive Safety Protection Mechanisms

Insulation and Electrical Alarms: Insulation alarm thresholds can be set from 1kΩ to 100MΩ, with warning boundaries for parameters such as voltage, current, and harmonics. This complies with the safety requirements of GB/T 14711-2013 and aligns with power quality standards such as GB/T 14549-1993 (harmonics) and GB/T 12326-2020 (voltage fluctuations).

Medium-Voltage Interlock Control System: The WRS-MTS31 can interface with motor control switches, automatically switching operating modes and outputting relay alarm signals. This creates a closed-loop system of "monitoring–alarm–control" to enhance the overall safety of medium-voltage systems.

(3) Electromagnetic Compatibility and Reliability Design

The sensors strictly adhere to standards such as GB/T 17626.2-2018 (electrostatic discharge immunity) and GB/T 17626.3-2016 (radio frequency immunity). Special anti-interference designs ensure stable operation in high-frequency electromagnetic environments, preventing data distortion.

IV. Alignment with International Standards

(1) Global Adaptation of Performance Evaluation

According to IEC 60034-1 "Rotating Electrical Machines—Rating and Performance," core parameters such as motor efficiency and power must be monitored in real time. Warrenson sensors collect current and voltage data, providing a foundation for evaluating whether motors meet rated performance and helping companies comply with international market access requirements.

(2) Insulation Withstand Voltage Aligned with International Standards

The 500V DC test voltage of the WRS-MTS2X and the 2500V DC test voltage of the WRS-MTS31 correspond to IEC 60243-1 "Electric Strength of Insulating Materials" and IEC 60270 "High-Voltage Test Techniques," respectively. Both testing processes strictly follow international safety standards to ensure globally recognized insulation performance evaluation results.

V. Standard Extension—Demonstrating Full-Chain Compliance Value

The sensors cover not only core dimensions but also multiple standards, including insulation structure evaluation (GB/T 17948.3-2017), relay protection testing (GB/T 7261-2016), and instrument transformer technology (GB/T 20840.1-2010). This comprehensive data collection provides robust support for the full lifecycle management of motors. Warrenson Electric treats standardization as a core competency, offering reliable and compliant insulation monitoring solutions in sectors such as new energy and rail transportation.