EEU Tender for oil test instruments
ETHIOPIAN ELECTRIC UTILITY (EEU) Technical Specifications for Fully Automatic Dielectric Constant Tandelta and Resistivity test set
1 Dielectric Constant & Dissipation Factor
A)Test Voltage
Range: 0 to 2400V AC at 50 Hz
Resolution: 1Volt
Accuracy: +/- 1% of output

B)Dielectric Constant Measurement
Range: 1 to 20 when using a typical oil test cell (C=70pF)
Resolution: 0.001
Accuracy: +/-0.1%

C)Dissipation Factor (DF)
Range: 0 – 1.000
Resolution: 0.00001(10-5)
Accuracy: +/-1% of reading+/-0.0001

4. Cell Constant: 50-80pf

5. Sp. Resistivity
A)Test Voltage
Range: 100-1000v DC
Resolution: 1volt
Accuracy: ±1% of setting

B)Resistivity Measurement
Range: 10(9) to 10(15) ohm-cm
Resolution: 3 digits
Accuracy: ±2% of reading at 10(9) to 10(13) ohm-cm
±5% of reading at 10(13) to 10(14) ohm-cm
±1% of reading above10(14) ohm-cm

6. Results
(1) Fully Automatic Measurements of DF, Resistivity& Dielectric constants
(2) Shall Support Manual Measurements at selectable voltage

7. Display: LCD

8. Key Board
a) Water Proof
b) Alpha numeric
c) Soft - function entries

9. RS-232 Ports/Serial & Parallel port: Should have facility to connect the instrument to
a) PC
b) Printer

10. Oil Test Cell As per IS-6103
Construction: 3 Terminal configuration
Material: SS 316 with Teflon Spacers
Cell Capacitance: 50-80pf
Cell Electrode spacing: 2mm
Volume: 45 mL

11. Oil Test Cell Heater
General Specification
a) High frequency Induction heater
b) Rate of rise of Temp 6°C/min
c) Temperature sensor probe
d) Automatic heating OFF/ON and Display
e) Temperature Display
Power Supply: 230VAC, ±10% 50Hz
Temperature Range: 20-110°C
Accuracy: ±2°C

Desired features
Test set up shall be/have
a) Fully Automatic controlled by microprocessor
b) Windows software for interfacing to a PC.
c) Automatic Calibration of C& DF measurement.
d) Traceable Calibration certificate.
e) Service facility in India