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HOME > PRODUCTS > ON-LINE CONTINUOUS MONITORING |
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on-line monitoring system |
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| Transformer Diagnostics Monitor |
Introduction
- Integrated diagnostic monitoring system on 110~330kV transformer
insulation condition
- Very easy to integrate it into existing protection systems
- Monitors bushing insulation based on the sum of currents method
- Monitors PD caused by bushing and transformer insulation defects
- Monitors load current signals to detect critical winding deformation
resulting from short circuits
- Estimates an efficiency of the transformer cooling system
- Noise elimination method: T-F analysis, polarity discrimination, TOA
method
- Two years archive of events
- TDM software for Expert analysis
Features
1. Main insulation state
- Monitors partial discharges in transformer insulation
- Identifies defect type by correlation of partial discharges intensity and
type of the revealed defect with chromatography data
2. Bushing insulation state
- Monitors bushing tan delta, capacitance and conduction currents
- Monitors partial discharges in HV bushings
3. Asymmetry of Phase windings impedance
- Monitors the transformer neutral current indicating asymmetry in the
windings impedance, which occurs when windings deformation as result
of short circuit currents
4. Efficiency of Cooling system
- Monitors temperature difference between the top and the bottom
parts of the transformer tank along with the ambient temperature and
load
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| System Configuration |
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| Specifications |
| Operating temperature, ℃ |
-30 ~ 70 |
| Bushing sensor inputs |
3 |
| RFCT sensor input |
1 |
| Oil temperature sensor inputs |
2, RTD Pt-100 |
Ambient temperature sensor input |
1, RTD Pt-100 |
Ambient humidity sensor input
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1 |
| Load current sensor inputs |
3, CT
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| Neutral current sensor input |
1, CT
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| Communication interfaces |
USB / RS-232 / RS-485 |
| Communication protocol |
Modbus RTU |
| Output Relays |
3 (Status, Warning and Alarm) |
| Heater Relay |
1 |
| Power Supply |
100~240 VAC, 50/60 Hz |
| Total dimensions, mm |
230×170×40 |
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| Transformer Diagnostics Monitor |
Introduction |
On-line Electrical and Chemical Diagnostic Monitoring for oil-immersed large power transformers
: Partial discharge diagnostics & Dissolved gas analysis |
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| It is an on-line electrical and chemical diagnostic monitoring system for oil-immersed large power transformers. This device consists of Model TDM I for an electrical diagnostics and Model TGA-8 for a chemical diagnostics. TDM I monitors tan delta, capacitance, conductive currents and partial discharges of HV bushings and measures phase load currents and neutral current to detect winding imbalances and checks differences of temperature between top oil and bottom oil to estimate the efficiency of a cooling system. TGA-6 or TGA-8 analyzes the dissolved gases in the insulating oil using oil chromatography. The detectable gases include hydrogen (H2), carbon monoxide (CO), methane (CH4), ethane (C2H6), ethylene (C2H4), acetylene (C2H2) and so on. |
On-Site Installation
TGA-6/TGA-8 & TDM-1 |
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| System Configuration |
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| Standard Set |
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| TGA-6 / TGA-8 |
| No. |
Gas |
Range (ppm/l) |
Accuracy |
| 1 |
Hydrogen(H2) |
1~2,000 |
±(10%+1) |
| 2 |
Carbon monocide(CO) |
5~2,000 |
±(10%+5) |
| 3 |
Menthane(CH4) |
1~2,000 |
±(10%+1) |
| 4 |
Ethane(C2H6) |
0.1~2,000 |
±(10%+0.1) |
| 5 |
Ethylene(C2H4) |
0.1~2,000 |
±(10%+0.1) |
| 6 |
Acetylene(C2H2) |
0.1~500 |
±(10%+0.1) |
| 7 |
Carbon diocide(CO2) |
20~20,000 |
±(10%+20) |
| 8 |
Oxygen(O2) |
100~50,000 |
±(10%+100) |
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| Standard Set of TGA |
| No. |
Item |
Description |
Q'ty |
| 1 |
TGA chromatogram |
1235mm×790mm×470mm / 60kg |
1 ea |
| 2 |
Intelligent Controller |
450mm×440mm×180mm / 10kg |
1 ea |
| 3 |
Control Cabinet |
2200mm×800mm×600mm / 55kg |
1 ea |
| 4 |
Carrier gas |
GB/T8980-1996 high-purity nitrogen |
1 ea |
| 5 |
RS-485 communication cable |
All shielded 4 cores pair-twisted cable |
1 set |
| 6 |
Oil pipe |
Special copper pipe, 6×4mm |
1 set |
| 7 |
Oil valve |
Customized |
2 sets |
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