T/Guard+ System

Description

Features
  • No calibration or maintenance ever
  • Probes requires no gage factor or calibration
  • ASCII or OPC Server, CANopen (DeviceNet); MODBUS, DMP 3.0, IEC 61850 and TCP/IP optional communication protocols
  • Voltage or current output
  • Accuracy of ±1°C
  • 1 to 16 optical channels
  • 16 Form-C (can be set as A or B relays) with galvanic isolation
  • Data acquision optional

A multichannel fiber optic system for high voltage and transformer hot spot temperature measurement incorporating 16 Form-C relays

Download Datasheet (PDF)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 T/Guard+™ system is available with 1 to 16 channels. It can be mounted in an optional NEMA-4 enclosure with a see-through window door. 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 Neoptix T/Guard+™ system is available with a data logging option that relies on removable flash cards. This option allows recording of temperature data points and alarms status information directly into the T/Guard+™ system without the need for permanent connection to a remote acquisition system or to a PC. Data collected by the T/Guard+™ is saved in a standard SD multimedia flash card. The system can accept memory cards of up to 128 megabytes, which is sufficient to log over 6 millions data points. This represents more than twenty years of data logging for a transformer instrumented with 8 temperature probes! The SD card can be read by any PC through a standard SD card reader. Moreover, 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 has 16 Form-C (SPDT) industrial relays with galvanic isolation which can also be set up as Form-A or Form-B relays by user. The system can be easily connected to any acquisition system, like a SCADA, through its built-in OPC server, its RS-232C communication port or by the standard 4-20 mA analog outputs (0-10 Volts on request). The T/Guard+™system may also be ordered with DNP 3.0 and IEC 61850 connectivity.

System’s configuration is made through the indutrial grade front panel keypad or the communication port. The T/Guard+™front panel features a 4 lines by 20 characters backlight LCD display.

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 65°C; non-condensing
Environmental control:
Automatic heating/cooling optional with NEMA 4-12 enclosure
Storage temperature:
-40 to 70°C; non-condensing
Display:
4 lines X 20 Characters LCD display
Units:
User selectable; Metric or Imperial
Operating Mode:
Front panel keypad, RS-232/485 commands (OPC Server)
Communication port:
Serial (RS-232 or RS-485); Ethernet optional
Communication protocols:
ASCII or OPC Server and CANopen (DeviceNet); MODBUS, DMP 3.0, IEC 61850 and TCP/IP optional
Analog outputs:
Standard: 0-10 Volts, Optional (no charge): 4-20 mA
Relays:
16 Form-C (SPDT) relays with galvanic isolation; can also be set up by user as Form-A or Form-B relays.
Data logging:
Optional; Up to 128 megabytes on MMC/SD removable flash card
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 input:
21~28VDC (nominal) 24VDC, 2A; Universal power supply optional.
Enclosure:
Powder coated Gage 16 steel enclosure with direct access to relays and analog outputs
NEMA-4 Enclosure with see-through window optional
Dimensions:
Width: 250 mm; Height: 350 mm; Depth: 150 mm
Weight:
6.1 Kg
Warranty:
5 years warranty, covers parts and labors
Ordering Codes:

 

Literature/images

LITERATURE

 

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:

NEMA Enclosure for T/Guard+ System (Part: TGP-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.

Power supply for T/Guard+ System (Part: TGP-TPS)
Supplementary 24 VDC, 2A, universal (100-240VAC @ 47-63 Hz) power supply for your T/Guard+ Signal Conditioner. Desktop version with 1.5 meter cable. Includes wall plug for your country

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.

Supplementary data logging flash card (Part: NXP-314-256)
Neoptix approved 256 MB SD Flash Card. Add more logging capacity to your T/Guard+ System or devote one card to each of your project!