LEM Voltage Transducer Selection Guide
This technical reference document provides detailed information about lem product specifications, characteristics, and performance parameters. Use this information to support your design and analysis activities.
Electrical characteristics are specified over the operating temperature range unless otherwise noted. Parameters are guaranteed by design, testing, or statistical analysis. Typical values is the most likely parametric norm at 25°C.
Thermal characteristics require careful attention during system design. The junction-to-ambient thermal resistance depends on the mounting configuration, PCB copper area, and airflow conditions. Use thermal simulation tools to predict operating temperatures under actual conditions.
Reliability data is based on accelerated life testing and field failure analysis. Mean time between failures (MTBF) calculations follow industry-standard methodologies. Contact BeiLuo for detailed reliability reports and qualification data.
💡 FAE Insights
⚠️ Common Pitfalls
- ✗ Underestimating isolation voltage requirements
- ✗ Neglecting environmental conditions in selection
- ✗ Choosing inappropriate output type for integration
- ✗ Not verifying specifications for system compatibility
- ✗ Overlooking transient voltage conditions in selection
📋 Customer Cases
Industrial Motor Drive Supplier
Industrial Automation
Challenge
Customer needed reliable voltage monitoring in a 690V motor drive system with strict isolation requirements and long-term reliability.
Solution
Recommended LEM voltage transducer with 5kV isolation and industrial-grade specifications to ensure safe operation and measurement accuracy.
Customer Feedback
"The voltage transducers provided stable performance across varying load conditions and maintained accuracy even under challenging environmental conditions. The 20-year product life warranty gave confidence in long-term system reliability."
Frequently Asked Questions
1. What isolation voltage requirements should I consider?
Isolation voltage requirements depend on your application voltage levels and safety standards. For industrial applications, typically 2.5kV or higher isolation is recommended. For 400VAC systems, a minimum of 2.5kV isolation is standard. Always consider safety margins and environmental conditions when selecting isolation voltage ratings. Our LEM voltage transducers provide 2.5kV to 5.7kV isolation, meeting industry standards.
2. How do I choose between analog and digital output?
Analog outputs (0-5V, 0-10V, 4-20mA) provide direct measurement signals for simple systems and are easy to integrate with existing analog instrumentation. Digital outputs (SPI, I2C, RS485) offer enhanced accuracy, communication protocols, and advanced features like diagnostics and configurability. Choose analog for simple monitoring, digital for complex systems with communication requirements.