TECSYSTEM NT935 AD 4-Channel Smart Temperature Controller
The TECSYSTEM NT935 AD is a 4-channel smart temperature monitor based on an electronic microcontroller, specifically designed for temperature monitoring of dry-type and cast resin transformers. This device integrates temperature monitoring, multi-stage alarms, automatic fan control, and remote communication, serving as the core control unit for thermal protection of dry-type/cast resin transformers.
Key Specifications:
· Brand: TECSYSTEM (Italy)
· Model: NT935 AD / Product Code 1CN0135
· Input Channels: 4 independent 3-wire PT100 platinum resistance inputs
· Output Configuration: 5 dry contact relay outputs (ALARM, TRIP, FAN1, FAN2, FAULT) + 4-20mA analog output + RS485 Modbus RTU communication
· Power Supply: 24-240V AC/DC universal, auto-sensing, 50/60Hz
· Measuring Range: 0°C to 240°C
· Measuring Accuracy: ±1% vfs, ±1 digit
· Display: Dual LED display showing real-time temperature, channel number, and alarm status
· Dimensions: 144 x 144 x 60 mm (W x H x D)
· Net Weight: 0.6 kg
· Protection Rating: IP65 (front panel)
· Operating Temperature: -20°C to +60°C
Key Features:
· VOTING Function: Multi-channel data logic judgment to prevent false alarms from single sensor failure, enhancing protection reliability
· FAIL SAFE: Automatically triggers protection action on sensor open circuit or short circuit
· Remote Communication: RS485 Modbus RTU for real-time temperature monitoring and remote parameter configuration
· Analog Output: 4-20mA output for DCS/SCADA system integration
· Programmable Thresholds: Independent alarm, trip, and fan start/stop temperature settings for all 4 channels
· Dual Fan Control: Automatic control of two cooling fans (FAN1, FAN2)
· Data Storage: Built-in EEPROM, parameters saved during power failure
Optional Configurations:
· cULus certification (for North American market)
· RINA certification (for marine applications)
· Special coating for electronic board (for tropical climates and high humidity environments)
Applications:
· Temperature Monitoring for Dry-Type and Cast Resin Transformers
· Medium-Voltage Transformer Thermal Protection
· Industrial Electrical Equipment Temperature Monitoring
· Marine Applications (RINA certification optional)
· North American Market (cULus certification optional)
Certifications:
· CE, EN50121-5 (standard)
· cULus (optional, North American market)
· RINA (optional, marine applications)
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