 |
|
 |
|
|
|
|
|
|
|
|
|
|
 |
|
Major Facilities |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 Name of the Equipment: Sweep Frequency Response Analyzer (SFRA)
Application: It detects mechanical failure or movement of transformer core or windings due to short circuits, mechanical stresses or transportation.
Principle of Operation: The instrument automatically sweeps the object under test with sinusoidal voltages over a wide range (10 Hz to 10 MHz) and measures its response. Thereafter, it is compared to baseline and results available from other similar units. A built-in analysis and display package enables diagnosis in respect of the mechanical integrity of the core & winding.
Features /Specifications:
Frequency range 10 Hz to 10 MHz
Output voltage: 10V peak to peak at 50 ohms.
Test method for data collection: Sweep frequency
Number of points: 1250 logarithmically spaced
Accuracy:  1dB down to -70 dB
PC communication: Ethernet /USB
Software: M5200 SFRA office view,
compatible with
windows 2000 / xp
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Name of the Equipment: Insulating Oil Test Set
Application: It measures the dielectric strength of transformer oil as per IS- 1866(83). A low value for the dielectric breakdown voltage generally serves to indicate the presence of contaminants such as water, dirt or other conducting particles in the oil.
Principle of Operation: It consists of three main parts
1. Oil Testing Cell
2. H.T. Transformer
3. Control Cables
Supply Voltage 230V / 50Hz are transformed into a high voltage by HT transformer. HT side of transformer is connected to electrodes arranged in oil test cell. The voltage is increased in steps till the spark between the electrodes occurs. The result can be viewed on three LCD display or can be printed as a hard copy. In auto modes it takes the average six readings.
Specification:
Input Voltage: 220/230V, 50 Hz
Output Voltage: 0-100 KV
Capacity: 1.0 KVA
Rate of Rise of Voltage: 2.0KV per sec.
Stirring time, wait time and settle time: Programmable
Cooling: Air Cooling
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
   |
|
| |
|
|
|
Name of the Equipment: Automatic Capacitance and Tan Delta Test Set
Application: It measures Capacitance, Dielectric Constant, Tan Delta and Resistivity of insulating medium. Though specifically designed for testing oil and other dielectric fluids, it can be used to test other insulating media, provided a suitable test fixture is available. The instrument is fully automatic and microprocessor controlled.
Principle of operation:
The instrument basically makes measurement for resistance, capacitance and dissipation factor.
The resistance measurement is accomplished by using semiconductor junction that converts the current from the sample into a voltage with logarithmic compliance.
The capacitance measuring circuit uses a transformer ratio-arm bridge to compare the unknown capacitance sample to a reference capacitor. The inherent characteristics of the transformer ratio arm bridge allow convenient three terminal measurements to be made.
Specifications:
Test Voltage: 0-2400 in 1 volt step at line frequency
Accuracy: ± 1% of Output
Capacitance: 0-200--1600 pf
Accuracy: ± 0.1% of reading ± 0.1pf
Preset Resolution: 0.01pf
Dielectric Constant: 1 to 20 when using typical oil test cell
Accuracy: ± 0.1%
Dissipation Factor(DF): 0-1.00
Accuracy:
± 1% of reading +0.00002
Best resolution: 0.00001(10-5)
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Name of Equipment: Moisture in Oil – Test Sensor
Application: It measures the water content in transformer oil. It is configured to display the following quantities:
1. Relative saturation in percentage (0 to 100 %)
2. Temperature (-40 to 180 deg. Celsius)
3. Parts Per Million (mg per kg)
Principle of Operation: It comprises of a stainless steel probe and a probe cable to connect the probe to transmitter/ display
- Steel probe houses the moisture and temperature sensors and can be installed on any valve of size 15mm or larger.
- Moisture censor works on the principle of change in the capacitance due to the change in permittivity due to the presence of moisture.
Specification:
Sensors are robust and can withstand pressure from vacuum to 280 Pascal and temperature up to 180 deg. Celsius. Its calibration is stable and accuracy is ±1%. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Name of the Equipment: Portable Dissolved Gas Analysis Set
Application: Provides advance warning of developing faults in transformer. Its use can be extended to other oil filled equipments such as tap changers and circuit breakers. Even gas samples taken from Bucholtz relay can also be tested. The equipment analyses the concentration of the degradation product in the form of gases: H2, CH4, C2H2, C2H4, C2H6, CO, CO2.
Principle of Operation: It uses photo acoustic spectroscopy to achieve unprecedental performance for DGA equipment.
DGA diagnostic algorithm options:
1. IEEE key Gas Method
2. Roger Ratio Method
3. Duval's Triangle Method
Features/Specification:
1. Contains an embedded PC and touch screen
2. Incorporated transport Pro PC software contains instructions to guide the users through operation and algorithm to assist the diagnosis of the equipment.
3. PCs internal database can store 1600 records
4. Communication with external PC is possible via USB connection
5. A thermal printer is provided to maintain hard copy of the record
6. Power supply requirements are 100 - 240 volts, 47-63 Hz. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Simulation of electric/electronic circuits using MATLAB 7(Simulink), LAB VIEW along with hardware(NI ELVIS) & Electric/Electronic Circuits. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Name of Transformer Design Software: Softtra
It is designed by Softbitonline. It can design transformer in the range:
Distribution Transformer: 25 KVA to 2000 KVA
Power Transformer: 25 KVA to 10 MVA
DATA to be Specified:
1. HT & LT, KVA/MVA rating, Frequency and number of phases
2. Short Circuit Impedance
3. No Load Loss
4. Short Circuit Loss
5. Efficiency at specified %ge load and power factor value
6. Current Density: Specified or can be set by the software itself
Design Details:
The software is designed to provide
1. Core Details
2. Coil and Core Assembly Drawing
3. Estimating and Costing
4. Outline Assembly Drawing, etc.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|