JPH0710302Y2 - 信号ケーブルの絶縁不良検知装置 - Google Patents
信号ケーブルの絶縁不良検知装置Info
- Publication number
- JPH0710302Y2 JPH0710302Y2 JP1988044902U JP4490288U JPH0710302Y2 JP H0710302 Y2 JPH0710302 Y2 JP H0710302Y2 JP 1988044902 U JP1988044902 U JP 1988044902U JP 4490288 U JP4490288 U JP 4490288U JP H0710302 Y2 JPH0710302 Y2 JP H0710302Y2
- Authority
- JP
- Japan
- Prior art keywords
- signal cable
- signal
- detection
- insulation failure
- soil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 title claims description 45
- 238000009413 insulation Methods 0.000 title claims description 36
- 230000002950 deficient Effects 0.000 claims description 20
- 239000002689 soil Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 description 9
- 241000196324 Embryophyta Species 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Locating Faults (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988044902U JPH0710302Y2 (ja) | 1988-04-01 | 1988-04-01 | 信号ケーブルの絶縁不良検知装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988044902U JPH0710302Y2 (ja) | 1988-04-01 | 1988-04-01 | 信号ケーブルの絶縁不良検知装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01148872U JPH01148872U (enrdf_load_html_response) | 1989-10-16 |
| JPH0710302Y2 true JPH0710302Y2 (ja) | 1995-03-08 |
Family
ID=31271237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988044902U Expired - Lifetime JPH0710302Y2 (ja) | 1988-04-01 | 1988-04-01 | 信号ケーブルの絶縁不良検知装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0710302Y2 (enrdf_load_html_response) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3792350A (en) | 1972-03-15 | 1974-02-12 | Bell Telephone Labor Inc | Detection of metalshield faults in buried cable |
| US3991363A (en) | 1975-08-11 | 1976-11-09 | Bell Telephone Laboratories, Incorporated | Method and apparatus for detecting faults in buried insulated conductors |
| US4039938A (en) | 1976-09-08 | 1977-08-02 | Bell Telephone Laboratories, Incorporated | Method and apparatus for detecting faults in buried insulated conductors |
-
1988
- 1988-04-01 JP JP1988044902U patent/JPH0710302Y2/ja not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3792350A (en) | 1972-03-15 | 1974-02-12 | Bell Telephone Labor Inc | Detection of metalshield faults in buried cable |
| US3991363A (en) | 1975-08-11 | 1976-11-09 | Bell Telephone Laboratories, Incorporated | Method and apparatus for detecting faults in buried insulated conductors |
| US4039938A (en) | 1976-09-08 | 1977-08-02 | Bell Telephone Laboratories, Incorporated | Method and apparatus for detecting faults in buried insulated conductors |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01148872U (enrdf_load_html_response) | 1989-10-16 |
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