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      1.  

        Fiber Optic Sensors and Thermometers for Oil Filled Transformer Hot Spot Temperature Measurement

        Original
        price: Negotiable
        minimum:
        Total supply:
        Delivery term: The date of payment from buyers deliver within days
        seat: Beijing
        Validity to: Long-term effective
        Last update: 2020-03-13 15:46
        Browse the number: 246
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        Company Profile
         
         
        Product details

        1.?Product Introduction

        Transformers winding hot points is the highest temperature in the insulation system of the winding. It is well known that the short-term effects of transformers overheat are reduction in insulation, temporary deterioration of mechanical characteristics, and reductions in short circuit intensity. In the long run, the life of the transformer will be shortened, aging of the Insulation materials will be accelerated, and sealant will become brittles. That is to say, winding overheat during operation affects the safety and life of transformers.?


        Cooling control of power transformers is traditionally provided by a winding temperature indicator (WTI) that is based on a measurement of the top-oil temperature and a simulation of the winding hottest spot temperature. This method has some drawbacks and utilities are now applying more fiber optic temperature sensors & monitoring system for this critical function.

        The fiber optic temperaturesensors?are of extremely high di-electrical strength and can be installed directly onto windings without causing insulation or PD issues. The monitors are of up to 16 channels, can communicate directly with SCADA?system through RS485?or other smart communication protocols. It also allows users to control the cooling efficiency and provide trends/alarms in real-time.?


        ?2.Product Specification

        Model No.

        HQ-E116

        Temperature Range

        -40℃-260℃

        Temperature Accuracy

        ±1℃

        Temperature Resolution

        0.1℃

        Number of Channels

        Upto 16 channels

        Temperature Unit

        ℃?or ℉

        Display Mode

        Digital tube display, display directly if less than 8 channels, display in turn if more than 8 channels

        Response Frequency

        2 seconds per channel (Depend on probes’ position)

        Power Supply

        24V DC

        Digital Interface

        Two RS-485

        USB

        Analogue ouput: 4-20mA

        8 relays

        Memory

        1GB memory space, flash drive (USB port) accessible

        Power Consumption

        ≤10W

        Communication Protocol

        Modbus (IEC 61850 customizable)

        Fiber Optic Length

        Per requirement


        3. Installation diagram

        ? ?

        4. Main advantages of using fiber optic temperature sensors in transformers are:? ? ??

        ● Accurate, direct temperature reading of winding hot spots

        ●?Predicts or adjusts the dynamic loading of high voltage transformers
        ● Prevents premature failures
        ● Provides cost effective monitoring of transformers temperature
        ● Extends transformer life and helps estimate the insulation degradation rate
        ● Complements predictive hot-spot algorithm simulations


        5. Project Reference

        http://www.herchopto.com/

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