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FISO Technologies Inc. - Temperature Monitor

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FISO Technologies Inc. - Introduction

FISO is a leading developer and manufacturer of fiber optic sensors and signal conditioners used in medical, energy, process control and R&D applications.


FISO Technologies Inc. is a leading developer and manufacturer of fiber optic sensors and signal conditioners. Committed to providing customers with innovative and reliable solutions for measuring parameters such as temperature, pressure, displacement and position, strain and load as well as refractive index, both in harsh environments and challenging applications, FISO’s targeted markets are medical, process control, energy and research laboratories.


Fiber optic sensors and probes are designed by experienced engineers and scientists who always have in mind the needs of their customers. FISO know that our customers are working in challenging environments and need products that are based on cutting-edge technologies. One of their strongest competitive advantages is our ability to respond quickly to the needs of their customers and customize their solutions when necessary.


FISO strive as strongly as our customers to offer the best products and technologies. Besides its extreme accuracy, the advantages of fiber optics are: very high precision, intrinsically safe per nature, minimally invasive (nanotechnology), and immunity to radio frequencies, electromagnetic interferences and microwave radiations.


The company was founded in 1994 and is part of Roctest. Its products are sold in more than 75 countries through a network of representatives and distributors. Since 2003, FISO Technologies Inc. meets the requirements of the ISO 9001:2015 and ISO 13485:2016 certifications. The company is assessed and certified by BSI Group, and strictly applies its quality policy day after day.

Visit FISO website

Nortech Transformer Winding Hot Spot Temperature Monitoring

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FISO’s Nortech Transformer Winding Hot Spot Temperature Monitoring System offers direct, real-time, and long-term monitoring of power transformers, which allows for smarter dynamic substation and power grid management.


FISO’s solutions will maximize any transformer’s performance by monitoring its true temperature, which reduces premature aging and allows for intelligent preventive maintenance planning. Overall, FISO’s solutions will have a positive impact in terms of return on your investment.

The Nortech Fiber Optic System

  • Reliable & cost effective hot spot solution
  • IEC compliant EasyDisk sensor installation
  • Leak-free tank wall optical interface
  • User-friendly installation and operation
  • Nortech Client PC software support


FISO’s proposition to support the work of utility businesses is the Nortech Transformer Winding Hot Spot Temperature Monitoring System. Using the proven fiber optic technology, the Nortech system allows for direct, real-time, and long-term monitoring of power transformers, thus providing smarter dynamic substation and power grid management. 

Catalogue

GaAs Detection Principle

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The temperature monitor measurement principle is based on white light absorption/transmission by a GaAs (gallium arsenide) semiconductor. The impacts of temperature variations on this semiconductor are well known and predictable. As the temperature of the semiconductor changes, the semiconductor’s transmission spectrum (i.e. the light that is not absorbed) also shifts. At any given temperature, there will be a wavelength at which the transmission essentially jumps from 0% to 100%. This jump is called the absorption shift, and the relationship between the specific wavelength where the absorption shift takes place and the temperature is predictable. 


The sensor consists of a tiny GaAs semiconductor crystal that is bonded to one end of a well-polished fiber optic.

Temperature Sensor

The white light launched from the monitor into the fiber optic travels through to the GaAs crystal, passing through it while being partially absorbed, and is then reflected to the monitor by a mirror located at the very tip of the sensor. The light reflected to the monitor is coupled into an optical spectrum analyzer, which then measures the optical power transmission versus the wavelength. The position of the absorption shift is determined by the monitor using a proprietary signal analysis algorithm and is then correlated to the temperature of the GaAs crystal. 


Furthermore, since the semiconductor will not change over time, all sensors can be interchanged with no need for calibration or entry of factors when swapping sensors. For the same reason monitors never need recalibration after leaving the factory when used under normal operating conditions.

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The TPT-62 Fiber Optic Temperature Sensor with the EasyDisk

The TPT-62 fiber-optic temperature monitor probe family employs industry-standard 62.5µm core OM1 fiber optic for highly improved optical, mechanical, and reliability properties over legacy 200 µm core (1st generation) fiber optic sensors.


The EasyDisk sensor tip assembly ensures IEC60076-2 (Annex E) compliant installation and enables quick insertion of the probes into the spacers within the windings of transformers..

Data Sheet
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The Nortech Fiber Optic Monitors

The fiber optic signal conditioners are designed for direct, accurate and real-time temperature monitoring to manage and maximize your transformer’s performance.


The Nortech temperature monitor family comes in three different classes: the EasyGrid is the most comprehensive model, the EasyGrid LT is a compact and very cost-effective model for low channel count monitoring applications, and the EasyGrid Base is and even more compact model designed for easy network integration.

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EasyGrid Key Features:

  • Up to 18 optical channels
  • 0, 8 or 16 form C fully programmable relays
  • Modbus,IEC61850*, DNP3.0*, Modbus TCP-IP* and IEC 60870-5-104* communication protocols
  • 1 analog output for each optical channel
  • Large display screen (colour touch screen)
  • 1 system relay for independent system fail-safe alarm
  • Serial port: Modbus (ASCII / RTU)
  • Ethernet over fiber optics*
  • Internal data storage and removable media storage (SD card) for easy data export
  • Auto diagnostic & autocorrect
  • No calibration required

Learn more
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EasyGrid LT Key Features:

  • Up to 8 optical channels
  • 0 or 8 form C fully programmable relays
  • Modbus,IEC61850*, DNP3.0*, Modbus TCP-IP* and IEC 60870-5-104* communication protocols
  • 1 analog output for each optical channel
  • Large LCD screen
  • 1 system relay for independent system fail-safe alarm
  • Serial port: Modbus (ASCII / RTU)
  • Front access for easy wiring
  • Internal data storage and export through USB port
  • Auto-diagnostic & autocorrect
  • No calibration required

Learn more
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EasyGrid Base Key Features:

  • Up to 12 optical channels
  • Real-time temperature monitoring
  • Modbus, IEC61850*, DNP3.0*, Modbus TCP-IP* and IEC 60870-5-104* communication protocols
  • 1 analog output for each optical channel
  • Smart Grid Network compatible
  • 1 system relay for independent system fail-safe alarm
  • Serial port: Modbus (ASCII / RTU)
  • Ethernet over fiber optics*
  • Internal data storage and export through USB port
  • Auto-diagnostic & autocorrect
  • No calibration required

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Accessories: External extension Cable

  • Polyurethane external fiber optic cable for harsh environments. ST connectors for trouble-free installation. High quality assembly.

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Accessories: EasyPlate/EasyRing

  • Interface plate specifically designed for oil-filled applications. Leak-free design. Long-term reliability.

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Accessories: EasyThrough

  • 3/8” NPT; oil tight; stainless steel mating. High pressure and high temperature resistant. Preinstalled on the EasyPlate.

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Accessories: EasyCover

  • Stainless steel protective enclosure for the tank wall interface between the Easythroughs and external extension cables. Designed to protect both the ST-ST optical connections and the extension cables from the outside environment.

Videos

How to install sensors in transformers according to IEC

Learn how to install HotSpot sensors into transformers according to IEC and how FISO EasyDisk can increase long time reliability.

EASYTEST II - Product presentation

Presentation of FISO's EasyTest II, portable fiber optic temperature sensor reader. 

200µm VS 62µm Fiber Optic Review

Advantages of using 62.5µm over 200µm fiber optic.

FISO - EASYGRID Installation & Commissioning

Your first monitor install..

Additional Information

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We are very happy to discuss your transformer temperature measurement needs anytime.  Drop us a line and we will schedule a call.

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