Title: Communication Cable Insulation Testing Records
The following is a summary of the communication cable insulation testing records:The testing was conducted on a group of communication cables, each measuring 1000 meters in length. The cables were subjected to a series of insulation tests to ensure their reliability and performance. The testing records indicate that all the cables passed the insulation tests with flying colors.The first test involved measuring the insulation resistance of each cable. This was done by applying a high voltage to the cable and measuring the resistance between the conductors. The results showed that all the cables had an insulation resistance well above the specified minimum value.The second test was to check for any leakage current in the cables. This was done by applying a small voltage to the cable and monitoring the current flowing through it. The results confirmed that all the cables were free from leakage current.The third test was to evaluate the mechanical properties of the cables. This involved stretching and bending the cables to ensure they were capable of withstanding the stresses associated with their intended use. The results indicated that all the cables were of good mechanical quality.In conclusion, the communication cable insulation testing records show that all the cables tested were of high quality and suitable for their intended use. The testing results provide assurance that these cables will perform reliably and safely in their intended application.
Date: 2023-05-01
Test Location: Cable Factory, City A, Country B
Test Equipment: High Voltage Insulation Tester, Model No. CDE-1234
Test Cable: 1000V Copper Core, 300mm² Cross-Section, PVC Jacket
Test Parameters:
High Voltage: 1000V DC
Test Duration: 1 Minute
Temperature: 25°C ± 5°C
Humidity: 60% ± 10%
Test Results:
| Time (Seconds) | Voltage (V) | Current (mA) | Resistance (MΩ) | Capacitance (pF) | Tangent of Loss (tan δ) |
| 0 | 1000 | 0.5 | 1000 | 200 | 0.25 |
| 10 | 1000 | 0.45 | 1010 | 210 | 0.24 |
| 20 | 1000 | 0.42 | 1020 | 220 | 0.23 |
| 30 | 1000 | 0.38 | 1030 | 230 | 0.22 |
| 40 | 1000 | 0.35 | 1040 | 240 | 0.21 |
| 50 | 1000 | 0.32 | 1050 | 250 | 0.20 |
| 60 | 1000 | 0.31 | 1060 | 260 | 0.19 |
| 70 | 1000 | 0.29 | 1075 | 275 | 0.18 |
| 80 | 1000 | 0.28 | 1195 | 395 | 0.17 |
| 90 | 1000 | 0.27 | 1325 | 545 | 0.16 |
| Max Voltage Drop (ΔV): -5V (-5%)
| Min Voltage Drop (ΔV): -3V (-3%)
| Average Voltage Drop (ΔV): -4V (-4%)
| Max Current Drop (ΔI): -8mA (-8%)
| Min Current Drop (ΔI): -6mA (-6%)
| Average Current Drop (ΔI): -7mA (-7%)
| Max Resistance Change (ΔR): +7MΩ (+7%)
| Min Resistance Change (ΔR): +5MΩ (+5%)
| Average Resistance Change (ΔR): +6MΩ (+6%)
| Max Capacitance Change (ΔC): +3pF (+3%)
| Min Capacitance Change (ΔC): +2pF (+2%)
| Average Capacitance Change (ΔC): +2.5pF (+2.5%)
| Max Tangent of Loss Change (Δtan δ): -8%
| Min Tangent of Loss Change (Δtan δ): -6%
| Average Tangent of Loss Change (Δtan δ): -7%
| Total Test Duration: 6 Seconds
| Total Voltage Drop: -4V (-4%)
| Total Current Drop: -7mA (-7%)
| Total Resistance Change: +6MΩ (+6%)
| Total Capacitance Change: +2.5pF (+2.5%)
| Total Tangent of Loss Change: -7%
| Test Conclusion: The cable insulation is satisfactory and meets the specified standards.
| Signature: ____________________
| Date: ____________________
| Test Operator: ____________________
| Approval: ____________________
| Date of Approval: ____________________
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