T/Guard System for Transformer Hot Spot Monitoring
Description
- No calibration or maintenance ever
- Probes requires no gage factor or calibration
- Available with 1 GB datalogging memory
- RS-232, 485, Ethernet or
MODBUS communication - Voltage or current output
- Accuracy of ±1°C
- Available with 1 to 16 channels
A multichannel fiber optic system for high voltage and transformer hot spot temperature measurement
DOWNLOAD THE PDF DATASHEET
of the T/Guard System
The Neoptix™ T/Guard™ is a multi-channel fiber optic temperature monitoring system for power transformer hot spot measurements. The T/Guard system has been developed with long-term performance and stability in mind. This fiber-optic temperature monitoring system for power transformers offers accuracy, toughness and long-term resistance to failure.
Coupled with the T/Guard system, the Neoptix™ T2™ fiber-optic temperature probe provides accurate and direct temperature monitoring of transformer windings. This solution provides a realistic, real-time view of winding conditions that is quicker and more accurate than top oil thermocouple measurements, and greatly complements indirect measurements based on thermal models.
Neoptix™ T/Guard system give the exact temperature of probes in 165 millisecond per channel. Peak load or emergency overloads are thus detected almost instantaneously. With Neoptix technology, you have a new tool to optimize high-voltage transformer performance and life expectancy.
The Neoptix™ T/Guard system is specifically designed to meet power transformer industry requirements: extended intervals between servicing, low maintenance, rugged components and the ability to withstand the harshest conditions. All components have been specifically selected for long term performance, including the light source that has an MTBF superior to the life of the transformer. Moreover, compared to other technologies available on the market, like fluorescent decay, our sensor, based on solid state semi-conductor, do not fade or drift over time, allowing a constant and absolute temperature measurement of your transformer windings over the lifespan of the equipment.
Our fiber-optic probes are made only with dielectric materials and are designed to withstand initial manufacturing conditions, including kerosene desorption and heat runs, as well as long term oil immersion and vibration. Moreover, the Neoptix™ temperature probes are interchangeable and no calibration or inconvenient gage factors are required when changing sensors. 
The system is based on the proven solid state GaAs technology. An original algorithm is used to analyze the signal and provide repeatable and reproducible measurements.
The T/Guard System is available with 1 to 8 optical channels and comes standard with an LCD display with LED based backlight. Power consumption of the system is 4 wattss.
The mounting brackets are integrated directly into the T/Guard enclosure, which allow a clean and robust installation into your control cabinet or substation. It is optionally available mounted in a NEMA4-12 enclosure. Automatic cooling and heating could be ordered with this protective enclosure.
The T/Guard™ system can be delivered with a 1 Gigabytes on-board datalogging memory that allows Utilities and transformer operators to record temperature data points and alarm status information directly into their T/Guard temperature monitoring system, without the need for permanent connection to a remote acquisition system. The T/Guard option is delivered with a 1 GB memory size, which is sufficient to log over 24 millions data points. This represents more than forty years of data logging for a transformer instrumented with eight temperature transducers. The T/Guard system is a completely independent monitoring solution and the logged file can be retrieved by a PC using RS-232 serial communication. Data points are saved with a time stamp that comes from the internal real-time clock of the T/Guard System.
The T/Guard system is easy to interface to an existing marshaling or substation system via its 4-20 mA analog outputs (0-10 Volts optional) or its MODBUS communication interface. It also has RS-232 or RS-485 communication and features an optional TCP/IP bridge. When used with the optional Neoptix NeoLink™ software on the serial port, the T/Guard becomes an indispensable monitoring instrument.
T/Guard System is covered by a complete 5-years warranty
Specifications
Model name:
T/Guard™ System
Number of channels:
Available with 1 to 16 channels
Resolution:
0.1°C (0.2°F)
Precision:
±1°C (1.6°F) or 1 % FS
Response time:
250 milliseconds; probe dependent
Operating temperature:
-40 to 70 °C; non-condensing
Storage temperature:
-40 to 70°C; non-condensing
Temperature reading range:
-40 to 300 °C
Display:
4 lines X 20 Characters LCD display
Units:
User selectable; Metric or Imperial
Communication port:
RS-232, RS-485; Ethernet and MODBUS optional
Operating Mode:
RS-232/485: Neoptix™ NeoLink™ PC Software or ASCII commands; MODBUS if installed
Analog outputs:
Standard: 4-20 mA, Optional (no charge): 0-10 Volts
Calibration:
No system recalibration needed over lifespan to remain within specifications
Light source MTBF:
> 25 years of continuous use
Probe compatibility:
Neoptix T1™ and T2™ temperature probes for oil-fileld and dry-type transformer.
Power:
18 to 24 VDC, 8 Watts
Dimensions:
Width: 170 mm; Height: 60 mm; Length: 280 mm
Weight:
2.1 kg
Warranty:
5 years warranty, covers parts and labors
Ordering Codes:
Literature/images
LITERATURE
- T/Guard™ System Datasheet
Format: PDF - File size: 900 KB
IMAGES & GRAPHS
T/Guard Wallmount Installation Guide (CAD file available on request)
Accessories
Specific accessories specifically designed to complement and enhanced your T/Guard System fiber optic signal conditioner:
T/Guard transport case (Part: TGD-CAS)
Protective case for T/Guard signal conditioner, aluminum with foam to fit signal conditioner, sensors and accessories
Serial Ethernet Communication (Add "E1" at the end of T/Guard ordering code)
Access your transformer temperature readings from anywhere in the world! This option adds Ethernet connectivity, as a serial bridge, to your T/Guard System. You can use fixed or dynamic IP address.
NEMA Enclosure for T/Guard System (Part: TGD-NM4)
NEMA-4 water, oil and dust tight protective enclosure for T/Guard System signal conditioner. Made with 14GA steel, finished with heat fused polyester powder, electrostatically applied on a phosphatized base. AINSI/ASA 61 grey. NEMA-4-12/IP66.
Heating for NEMA enclosure for T/Guard System (Part: NXP-310)
Heating option for NEMA-4 enclosure for "T/Guard" signal conditioner, controlled with automatic thermostat, 550 Watts heater, specify 120V or 220VAC.
Cooling for NEMA enclosure for T/Guard System (Part: NXP-309)
Cooling system for T/Guard System NEMA-4 enclosure, controlled with automatic thermostat, hermetically sealed CFC free heat pipe core, maintenance free permannently lubrificated ball bearing type fan, maintain NEMA-4 type 12 integrity.
Tabletop type power supply for T/Guard System (Part: NXP-303)
Supplementary 18 VDC universal (100-240VAC @ 47-63 Hz) power supply for your Reflex and T/Guard Signal Conditioner. Desktop version with 1.5 meter cable. Includes wall plug for your country
DIN rail power supply for T/Guard System (Part: TGD-DPS)
DIN rail mountable 24 VDC universal (100-240VAC @ 47-63 Hz), 0.6A, power supply for your T/Guard Signal Conditioner.
