Neoptix - Field Proven Fiber Optic Temperature Sensors

• Description
• Specifications
• Literature/Images
• Accessories

Description

The Qualitrol/Neoptix T/Guard 408 is a small form factor and cost oriented fiber optic hot spot monitoring system specifically designed for small and midsize dry type and oil-filled power transformers. It provides essential data during transformer heat run and help maximizing cooling efficiency with accurate hot spot temperature measurement. The hot spot monitoring complements predictive hot-spot algorithm simulations

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of the T/Guard 408

The Qualitrol® T/Guard 408 is a multichannel fiber optic temperature monitoring system for power transformer hot spot measurements. It 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 408 system, the Qualitrol® T2 fiber-optic temperature probes provide 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.

Qualitrol® 408 give the exact temperature of optical probes in 200 milliseconds per channel. Peak load or emergency overloads are thus detected almost instantaneously.

The 408 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 far superior (>300 years) to the expected life of the transformer. Moreover, compared to other technologies available on the market, such as fluorescent decay, our sensor, based on solid-state semiconductor, do not fade or drift over time, allowing a constant and absolute temperature measurement of your transformer windings over the lifespan of the equipment.

Qualitrol fiber-optic probes are based on the proven GaAs technology and made only with dielectric materials. They are designed to withstand initial manufacturing conditions, including kerosene desorption and heat runs, as well as long term oil immersion and vibration.

The 408 system is available with 4,6 or 8 optical channels. There is one four-digits high powered LED display for each channel, allowing a clear view from remote.

System's power consumption is 18 watts with all relays enabled. It accept a broad range of AC and DC inputs.

The 408 can be DIN rail mounted in the back of the cabinet using its integrated rail brackets or mounted directly on the cabinet swing door using the four bolts anchors.

The 408 comes standard with a built-in 1GB data logging memory that allows utilities and transformer operators to record temperature data points and alarm status information directly into their 508 temperature monitoring system, without the need for permanent connection to a remote acquisition system. This memory represents more than fifteen years of data logging at every minute for a transformer instrumented with eight temperature probes. The information can be accessed through serial port (408) or any web browser (408XT). Moreover, data points are saved with a time stamp that comes from the internal real-time clock.

The 408 T/Guard system is easy to interface to an existing marshalling or substation system through its 4-20 mA analog outputs or through its RS-485 serial port using MODBUS, DNP3 or IEC 80670-5-101 communication interfaces. The 408XT version is Ethernet / Smart Grid ready and incorporates, among others, IEC-61850 protocol.  Information collected by the system can also be accessed through any web browser over TCP/IP.

With its small footprint, the 408 is a space-efficient and versatile instrument. All connections are made through detacheable plugs for an easy and seamless installation or service.

The 408 system has eight built-in Form-C (SPDT) industrial relays with galvanic isolation that can also be set up as Form-A or Form-B relays by user.  The system has a fail safe mode whereby relays can be activated in case of system problem.

System's configuration is made through the industrial grade front panel keypad, serial terminal, PC software (408) or the built-in web-based server (408XT).

 

Specifications

T/GUARD 408 and 408XT SYSTEM SPECIFICATIONS

SYSTEM SPECFICATIONS

Number of channel:
4, 6 or 8 optical channels

Resolution:
0.1°C (0.1°F)

Accuracy:
±1.0°C (1.6°F) or 1 % Full-Scale input range

Calibration:
No system recalibration needed over lifespan to remain within specifications

System sampling rate:
200 ms switching rate between each channel; Variable if set to “WTune” feature Rate can be adjusted by user from 200 milliseconds to one point per week

Data logging rate:
Data logging rate can be adjusted by user from one point every second to one point per hour period.

Built-in calculations:
Min/Max, Global values

Upgradability -Firmware:
Flash upgradeable through serial port and Ethernet/web server (408XT)

Display:
One four-digits block of 7-segments with LED backlight per channel

Units:
User selectable, Metric or Imperial, LED indicators on front membrane

Data logging memory:
1 GB on-board datalogging memory. Logging feature available for probes, alarms, system status, relays functions in an ASCII file (equivalent to 15 years of continuous logging on 8 channels at every minute).

Temperature measurement range:
-80 to 300°C (-112 to 572°F)

 

COMMUNICATION AND I/O

Operating Mode:
System front panel keypad, ASCII commands over RS-485
Ethernet/web-based configuration (408XT)

Communication (hardware):
Isolated RS-485 serial port on screw terminal, Ethernet/100BASE-TX (408XT)

Communication protocols:
SERIAL:
- ASCII (terminal console)
- MODBUS RTU (2 or 4-wire config)
- DNP 3.0 (optional)
- IEC 60870-5-101 (optional)

ETHERNET (408XT) :
- HTTP (Web based)
- IEC 60870-5-104 (optional)
- IEC 61850 (optional)

Remote (SCADA) output :
4-20 mA output (Max allowable load resistance of 400 ohms)

Relays:
8 built-in relay drivers for transformer cooling control, enclosure cooling/heating, trips, alarms, etc. ; Form-C (SPDT) relays (5A/240VAC or 0.3A/240VDC or 34 A/24VDC max @ 50°C), Programmable system fault relay and fail safe mode

Relay drive:   
Direct with system’s built-in calculation algorythms 

Analog Outputs:
4-20 mA; Detachable header connector blocks, 5.08 mm pitch. Eight (8) analog outputs (one per channel)

 

MECHANICAL AND ENVIRONMENT

Operating temperature:
-40 to +70°C, 5-90% humidity, non-condensing

Storage temperature:
-40 to +85°C, 5-90% humidity, non-condensing

PCB env. protection:
MIL-I-46058C (IPC-CC-830) Type SR silicone conformal coating

Light source MTBF:
Light source lifespan and optimal system performance superior to 300 years of continuous use. No degradation of total system accuracy over light source lifespan. 

Form factor:
IP 65 enclosure, DIN rail 35mm or front panel with M6 or M8 bolts

Front membrane:
UV stabilized polyester with 5 million push MTBF keys

Connectors:
Optical: Standard ST connector
Analog, relays, serial and power-in: 5.08 mm pitch connectors socket for headers with screw terminals
Ethernet: Isolated RJ-45 (408XT)

Dimensions/weight:
Width: 280 mm ; Height: 110 mm; Thickness: 69 mm;
Mounting holes:  4x M8 from front or 4x M6 if fastened from back of system
Mounting hole specs: 255 mm x 85 mm;
Weight: 2.0 kg

 

COMPLIANCE

Conducted/Radiated Emissions, surge withstand and environmental:
IEC 6100-4-2  ESD
IEC 6100-4-3  Radiated RFI
IEC 6100-4-4  Burst
IEC 6100-4-5  Surge
IEC 6100-4-6  Induced (Conducted) RFI
IEC 6100-4-8  Magnetic field
IEC 6100-4-11  Voltage dip
IEEE C37.90  Dielectric strength (high pot)
IEEE C37.90.1-2002  Fast transient
IEEE C37.90.1-2002  Oscillatory
FCC 47 CFR Part 15, Sub B
ICES-003 Issue 4, Feb 2004

 

POWER

Power requirements:
85 - 264 Vac  or 120 - 370 Vdc, 47- 63 Hz Frequency range

Power consumption:
18 Watts

 

OTHER

Probe compatibility:
Compatible with all of Qualitrol / Neoptix GaAs fiber optic temperature probes and transducers.

Probe signal optimization:
System has built-in Neoptix™  WTune™  probe optimization algorithm

Warranty:     
One-year complete international warranty;  Extended warranty available

ORDERING CODES

 

T/Guard 408 (standard)

 

T/Guard 408 XT version

 

 

(specs R0v10)

 

Literature/images

LITERATURE

• T/Guard 408 System Datasheet
  Format: PDF - File size: 984 KB

 

IMAGES

T/Guard 408 side view

 

 

 

Accessories

Specific accessories specifically designed to complement and enhanced your T/Guard LinkSystem:

NeoLink Software (Part: NEO-LNK)
NeoLink control and datalogging software for the standard T/Guard 408 signal conditioner