Fiber optic temperature measurement system for dry-type transformers

NegotiableUpdate on 10/12

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

Characteristic description: This product is very suitable for high voltage, strong magnetic field, flammable and explosive temperature measurement occasions. For example, high voltage hot spot temperature measurement for electrical equipment such as dry-type transformers in rail transit, and temperature measurement for special environments such as photovoltaic equipment, switchgear high voltage contacts, dry-type transformers, oil immersed transformers, medical, mining, etc.

Product Details

The measurement range specified in the "Electronic Temperature Controllers for Transformers" (JB/T7631-2016), which traditionally use Pt100 as a temperature sensor, can only be limited to below 1000V, and this sensor is made of metal material, which poses a safety hazard. Therefore, temperature sensor probes and leads for measuring transformer winding temperature have higher requirements.

The dry-type transformer fiber optic temperature measurement system uses a fluorescent fiber optic temperature sensor independently developed by Fuzhou Huaguang Tianrui as the temperature sensing element. This temperature sensing element is immune to electromagnetic interference and resistant to high voltage (100KV/fiber to ground lead distance of 0.4m). Fluorescent fiber optic temperature measurement completely solves potential safety hazards from the source of temperature measurement and enhances the safety level of transformers.

Fluorescent fiber optic temperature measurement system for dry-type transformerstarget

For the operating environment of dry-type transformers, isolation and shielding from external electrical interference signals are achieved from the power supply, signal input terminal, signal output terminal, and temperature control box shell.
No metallic substances, inherently safe.
In response to on-site working environments such as vibration, dust, moisture, and oil stains, multiple layers of protective measures are taken to ensure that the fiber optic thermostat has good electromagnetic compatibility, ensuring stable and reliable operation of the thermostat.

Technical parameters of fiber optic temperature measurement system for dry-type transformer

The following parameters are displayed as standard parameters and can be customized according to specific customer needs, making it easier to respond promptly to inquiries by phone:

ambient temperature	-20℃~+55℃
ambient humidity	≤95% （25℃）
Working Voltage	AC220V（+10%，-15%）
operating frequency	50Hz or 60Hz (± 2Hz) (AC)
measurement range	-40 ℃~200.0 ℃ (customizable)
measurement accuracy	±1℃ （可定制更高精度）
resolution	0.1℃
Control error	≤±0.5℃
Control output capacity	5A/AC250V
Number of temperature measurement channels	4 channels (expandable)
sensor type	Quartz fiber optic, standard 5-meter (customizable)
Temperature compensation range	-19.9℃~+19.9℃

Note: This sensor is wirelessly calibrated and does not require manual calibration by the user. The system adopts adaptive measurement and does not require LD value calibration.

Product Function Selection

Working power supply (customizable)	1、DC110V 2、DC220V 3、AC220V
Temperature measuring element	1. Platinum thermistor PT100 2. Fluorescent optical fiber
Number of temperature measurement channels	1-16 channels, multi-channel temperature measurement
Installation method	1. Wall mounted installation
Basic functions (regular D-type)	1. Three way winding temperature measurement; Automatic/manual start stop cooling fan; Compensation function for temperature display values in each channel; 2. Provide black box function, which can record the temperature data of the last power outage and the highest historical temperature; 3. TFT LCD display, LED display light, easy to operate; 4. Real time display of temperature curves and data storage; 5. Provide transformer door cabinet point opening alarm function; 6. Provide 1 set of over temperature alarm contacts (1 normally open, 1 normally closed); 7. Provide 1 set of over temperature trip contacts (1 normally open, 1 normally closed); 8. Provide one set of remote transmission contacts for the fan (1 normally open, 1 normally closed); 9. Provide 1 set of temperature controller fault alarm contacts (1 normally open, 1 normally closed);
定制功能（特殊需求可定制）	1. Provide 1 core temperature measurement and 2 core over temperature alarm contacts (1 normally open, 1 normally closed) (I function); 2. Provide RS485 communication function, communication with time stamps, capable of receiving time synchronization, MODBUS-RTU protocol (F function); 3. Fan fault diagnosis function, and provide fan fault alarm contacts (L function); 4. Provide 4 independent 4-20mA analog current output functions (E function); 5. Provide temperature measurement and control for the computer room environment; 6. Alarm function for winding temperature rise rate and iron core temperature rise rate; 7. The communication protocol can adopt methods such as Profibus, IEC60870-5-103, Ethernet communication, etc;