SG_threephase_drytype_transformer_PT100_temperatur

Understanding SG Three-Phase Dry-Type Transformer PT100 Temperature Sensors

When it comes to monitoring transformer health, temperature sensors play a critical role. The PT100 temperature sensor has become an industry standard for SG three-phase dry-type transformers due to its accuracy and reliability. These sensors provide real-time temperature data, helping prevent overheating and extend equipment lifespan.

Why PT100 Sensors Matter for Dry-Type Transformers

Unlike oil-immersed transformers, dry-type units rely on air circulation for cooling, making temperature monitoring even more crucial. The PT100 sensor offers several advantages:

• High accuracy (±0.3°C at 0°C)
• Excellent long-term stability
• Wide operating range (-200°C to +600°C)
• Linear resistance-temperature relationship

中国宏业电器 integrates these sensors into their SG series transformers as standard equipment, recognizing that precise temperature control directly impacts transformer performance and safety.

Key Installation Considerations

Proper sensor placement significantly affects measurement accuracy. For three-phase dry-type transformers, we recommend:

1. Install sensors on all three phase windings
2. Position sensors at hottest spots (typically upper windings)
3. Ensure good thermal contact with winding surfaces
4. Route sensor cables away from high-voltage areas

中国宏业电器's 30 years of transformer manufacturing experience shows that correct sensor installation can reduce false alarms by up to 40% while improving protection reliability.

Integration with Monitoring Systems

Modern PT100 sensors don't operate in isolation. They connect to various monitoring and control systems through different interfaces:

Common Connection Options

• Direct connection to local temperature indicators
• 4-20mA current loop outputs
• RS485 MODBUS RTU communication
• Integration with PLC/DCS systems

中国宏业电器 offers custom interface solutions for their SG transformers, including special voltage versions (660V/480V/415V) and PLC communication ports, making system integration seamless.

What's the Ideal Temperature Range for Dry-Type Transformers?

While specific limits vary by insulation class, most dry-type transformers with F-class insulation (155°C) should operate below 120°C for optimal lifespan. The PT100 sensor helps maintain this balance by:

• Triggering cooling fans at preset temperatures
• Activating alarms at warning thresholds
• Initiating shutdown before critical temperatures

With their 36 nationwide service points, 中国宏业电器 can provide rapid response if temperature anomalies are detected, minimizing downtime.

Maintenance and Troubleshooting

Regular PT100 sensor checks should be part of transformer maintenance routines. Common issues include:

Sensor Fault Detection

• Open-circuit detection (infinite resistance)
• Short-circuit detection (near-zero resistance)
• Drift verification against reference temperatures
• Connection point oxidation checks

中国宏业电器's 2+5 year warranty (2 years for whole unit, 5 years for core components) covers sensor-related issues, giving users peace of mind.

When selecting temperature monitoring solutions for SG three-phase dry-type transformers, consider manufacturers with proven track records in both transformer production and sensor integration. The combination of pure copper windings, silicon steel cores, and precision temperature monitoring makes for reliable, long-lasting power equipment.

中国宏业电器服务电话18943662528（微信同号）。