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Inspection Report英文版


Quality Inspection and Test Center for Equipment of Electric Power
(2011)Jian Zi No. JDL546

Inspection Report

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Quality Inspection and Test Center for Equipment of Electric Power Inspection Report
(2011)Jian Zi No. JDL546 Ⅰ. Entrustment Company Ⅱ. Sample Description Name: 10KV Heat Shrinkable Busbar Sleeve Model/Specification: MPG10Φ80/40 Manufacturer: Sample No.: Date of Manufacture: Sampling Manner: DL 2011-546 September 2011 Sample Delivery

Ⅲ. Inspection Standard DL/T 1059-2007 Heat Shrinkable Tube for Bus-bars of Electrical Equipment Ⅳ. Inspection Type Entrusted Inspection Ⅴ. Date of Inspection Oct.13~Nov. 14, 2011 Ⅵ. Inspection Conclusion According to the standard of DL/T 1059-2007 Heat Shrinkable Tube for Bus-bars of Electrical Equipment, we have conducted inspection for the 10KV heat shrinkable sleeve MPG10Φ80/40 in a series of items, and concluded that all inspection items are consistent with the requirements.

Date:

Special Stamp for Inspection Report of Quality Inspection and Test Center for Equipment of Electric Power

Quality Inspection and Test Center for Equipment of Electric Power

(2011)Jian Zi No. JDL546

Ⅶ. Inspection Instruction & Results 1. Exterior Inspection Inspect the heat shrinkable sleeve for bus bars visually, and its surface should be smooth, free of water marks, oil stains and pores or cracks visible to naked eyes. 2. Size Measuring The minimum thickness should be obtained by measuring six points evenly distributed on the circumference of sleeve with a micrometer. The length should be measured with a1mm steel tape. 3. Shrink Performance Take a sample over 300mm long, and measure the size before shrinking and after nonrestrictive shrinking respectively. Calculate the longitudinal variation rate after shrinking according to JB/T7829-2006. 4. Hardness Test The hardness test should be conducted according to GB/T 2411. When thickness of the test sample fails to meet the test requirement, it is allowed that a test sample is made with the raw materials and production processes the same with those of the tested samples. 5. Thermal Impact Test The thermal impact test should be carried out according to Appendix D of JB/T 7829-2006. 6. Mechanical Performance Test The mechanical performance test should be carried out according to GB/T 1040.2, and the aging test should be carried out according to GB/T 7141. 7. Volume Resistivity Test The volume resistivity test should be carried out according to GB/T 1410. 8. Oxygen Index Test The oxygen index test should be carried out according to GB/T 2406.2. 9. Power Frequency Voltage Test Have a bus bar not less than 1000mm long shrunk on a rectangular busbar connector applicable to it with the heat shrinkable tube, and then place another busbar connector of the same specification in parallel with the shrunk insulating busbar connector.Space between the two connectors is 70mm. Apply the power frequency voltage of 42kV on the insulating busbar connector for 1 minute.

The inspection results are showed in the following table.

Quality Inspection and Test Center for Equipment of Electric Power

(2011)Jian Zi No. JDL546

No. Inspection Item

Requirements of Standard

Inspection Result

Appraisal

1

Exterior Inspection

The surface is The surface should be smooth, free of water Consistent smooth, free of water marks, marks, oil stains and with the oil stains and pores or cracks pores or cracks requirements visible to naked eyes. visible to naked eyes. The longitudinal variation rate should be less than ± 10%, and the thickness unevenness should be less than 30%. Less than 90 The longitudinal Consistent variation rate is 5%, with the and the thickness requirements unevenness is 8%. Consistent with the requirements

2

Size after Shrinking and Shrink Performance Inspection Hardness (Shore A)

3

85

4

Thermal Impact

Consistent 158 ℃ , 168h, the sample The sample doesn’t with the crack or flow. should not crack or flow. requirements The tensile strength before and after aging of test piece should not be less than 8MPa, and the tensile strength variation rate should be within±20%. The tensile strength is 16.7MPa before Consistent aging and 15.5MPa with the after aging. The requirements tensile strength variation rate is -7%. The elongation at Consistent break is 344% before with the aging and 544% after requirements aging. 1.4×1015Ω·cm Consistent with the requirements Consistent with the requirements

5

Tensile Strength

6

Elongation Break

The elongation at break at before and after aging of test piece should not be less than 300%. Not less than 1.0×1014Ω·cm

7

Volume Resistivity

8

Oxygen Index

Not less than 27%

29%

9

Power Frequency Test

42kV, 1min, no Consistent 42kV, 1min, no flashover or flashover or with the breakdown breakdown with the requirements sample

Quality Inspection and Test Center for Equipment of Electric Power

(2011)Jian Zi No. JDL546

Appendix A

List of Main Instruments & Devices Used in the Inspection Instrument/ Device Code Measuring Range Uncertainty /Accuracy Calibration Institute

No.

Name. Model/Specification of Instrument &Device Frequency Resonance TAWF Series Device

Validity

1

312068

(0-75) kV

Grade 1

National Center for Sep. 25, 2012 High Voltage Measurement Hubei Measurement & Test May 31, 2012 Technology Research Institute May 14, 2012 Hubei Measurement & Test Oct. 10, 2012 Technology Research Institute Hubei Measurement & Test Oct. 26, 2012 Technology Research Institute

2

Tensile Testing Machine XL-50A

543

(0-500) N

Grade 1

3

Aging Test Chamber XG-CN

990014

(0-200) ℃

--

4

Thickness Micrometer

44848

( 0-250 ) mm

Grade 1

5

Megger ZC36

017

(106-1012) Ω

± 10%


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