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30kV heat shrink joint
30kV heat shrink joint
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Application areas:
Intermediate processing for 30kV cross-linked cables
Product Description
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a . Many cable joint failures are caused by poor sealing. Our company uses a new process (three-layer sealing process) to make the cable safer and more reliable in operation. The so-called three-layer sealing refers to the outer sheath sealing, the inner sheath sealing, and the sealing at both ends of the inner insulation tube, for a total of three seals.
b . The insulation tube was lengthened, which solved the creepage problem.
c . The sheath is flexible and flame-retardant.
Product Parameters
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Serial Number |
Test Item 1 ) |
Standard requirements |
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Indoor |
outdoor |
middle |
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1 |
Power frequency withstand voltage test |
81kV , 5min |
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Power frequency withstand voltage test under rain |
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At 72kV , for 1 minute, the combined sample did not exhibit flashover or breakdown. |
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2 |
Partial discharge test at room temperature |
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The discharge quantity of the combined sample at 30kV is ≤10pC. |
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3 |
High-temperature impulse voltage test, under θ t 2) |
170kV , 10 positive and 10 negative polarity impacts without flashover or breakdown. |
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6 |
Constant pressure load cyclic test (in air) |
Cycling 60 times at θt temperature and 45kV . |
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7 |
Partial discharge (at θt2 ) 4 ) and ambient temperature t ) |
≤10pC at 30kV |
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8 |
Short -circuit thermal stability (shielded 5 ) |
Under the I SC shielding of the cable , two short circuits resulted in no visible damage; |
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9 |
Short-circuit thermal stability (conductor) |
When the conductor temperature is raised to θ SC , two short circuits occur without visible damage. |
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10 |
Impulse voltage test |
10 impacts per polarity |
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11 |
AC withstand voltage |
45kV , 15min |
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12 |
Humidity test |
22.5kV , 300 |
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13 |
Salt spray test |
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22.5kV , 1000H | ------ |
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1) Unless otherwise specified, the test shall be conducted at ambient temperature; 2) θt is the highest temperature of the conductor during normal operation plus ( 5-10 ) ℃ ; 3) Each cycle lasts 8 hours , with a temperature stabilization time of at least 2 hours and a cooling time of at least 3 hours ; 4) Take measurements at the end of the heating period; 5) This test is only applicable to terminals that can be directly or indirectly connected to the cable's metal shield via a bushing; |
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Product Selection
|
voltage level |
Number of wire cores |
Cable cross-section /mm2 |
Product Code |
|
18/30 ( 36 ) kV 19/33 ( 36 ) kV |
3,1 |
35-50 70-120 150-240 300-400 500-630 |
18/30kVRSJY-3/1(1/1) 18/30kVRSJY-3/2(1/2) 18/30kVRSJY-3/3(1/3) 18/30kVRSJY-3/4(1/4) 18/30kVRSJY-3/5(1/5) |
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