{"id":240760,"date":"2024-10-19T15:45:48","date_gmt":"2024-10-19T15:45:48","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-79232004\/"},"modified":"2024-10-25T10:30:59","modified_gmt":"2024-10-25T10:30:59","slug":"bs-79232004","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-79232004\/","title":{"rendered":"BS 7923:2004"},"content":{"rendered":"

This British Standard specifies tests and requirements for radial-field impregnated-paper-insulated cables and accessories in which, during normal operation, a gas pressure exceeding 1.2 MPa (12 bar) gauge is applied internally, i.e. with the gas in direct contact with the insulation.<\/p>\n

It also specifies tests for cables and accessories intended for use in systems with a nominal voltage not exceeding 275 kV between phases.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\nBRITISH STANDARD <\/td>\n<\/tr>\n
2<\/td>\nCommittees responsible for this British\ufffdStandard <\/td>\n<\/tr>\n
3<\/td>\nContents <\/td>\n<\/tr>\n
5<\/td>\n1 Scope
2 Normative references
3 Terms and definitions
3.1 rated voltage
3.2 rated voltage
3.3 maximum voltage
3.4 peak voltage
4 Voltage designation <\/td>\n<\/tr>\n
6<\/td>\n5 Characteristics <\/td>\n<\/tr>\n
7<\/td>\n6 Test categories, frequency and conditions
6.1 Categories of tests
6.2 Frequency of tests
6.3 Test conditions <\/td>\n<\/tr>\n
8<\/td>\n7 Routine tests on cables
7.1 General
7.2 Conductor resistance test
7.3 Capacitance test
7.4 Tan \u00b8 measurement test <\/td>\n<\/tr>\n
9<\/td>\nTable 1 Tan
7.5 High-voltage test
Table 2 High voltage test values
7.6 Test on oversheath
8 Sample tests on cables
8.1 Measurement of thickness <\/td>\n<\/tr>\n
10<\/td>\n8.2 Bending test
Table 3 Diameter of the test cylinder <\/td>\n<\/tr>\n
11<\/td>\n8.3 Quality of insulation paper
9 Routine tests on accessories
9.1 General
9.2 Joint sleeves and porcelain assemblies <\/td>\n<\/tr>\n
12<\/td>\n9.3 Gas regulators
9.4 Safety valves
10 Sample tests on accessories
10.1 Procedure
10.2 Requirement
11 Type tests on cables and accessories
11.1 General
11.2 Electrical test sequence <\/td>\n<\/tr>\n
13<\/td>\n11.3 Cold tan\ufffd\u00b8 measurement\/voltage test
11.4 Three-cycle bend test <\/td>\n<\/tr>\n
14<\/td>\n11.5 Load cycle voltage test <\/td>\n<\/tr>\n
16<\/td>\n11.6 Thermal stability test
11.7 Switching impulse voltage test <\/td>\n<\/tr>\n
17<\/td>\nTable 4 Waveshape
Table 5 Voltage levels <\/td>\n<\/tr>\n
18<\/td>\n11.8 Lightning impulse voltage test
table 6 Lightning impulse test voltage levels <\/td>\n<\/tr>\n
19<\/td>\n11.9 Dielectric security test
12 Non-electrical type tests on cables
12.1 General
12.2 Internal thermal resistance of complete cable
12.3 Test on pressure-retaining sheath <\/td>\n<\/tr>\n
20<\/td>\n12.4 Test on tail cable sheaths <\/td>\n<\/tr>\n
21<\/td>\n12.5 Oversheath tests <\/td>\n<\/tr>\n
22<\/td>\n13 Non-electrical type tests on accessories
13.1 General
13.2 Buried joints <\/td>\n<\/tr>\n
23<\/td>\nTable 7 Impulse voltage level requirements
13.3 Outdoor terminations
Table 8 Test voltages for salt fog test <\/td>\n<\/tr>\n
24<\/td>\n13.4 Gas-immersed terminations
14 Tests after installation
14.1 High voltage d.c. test
Table 9 High voltage test levels <\/td>\n<\/tr>\n
25<\/td>\n14.2 Conductor d.c. resistance
14.3 Voltage test on oversheath and other sheath insulation
14.4 Sheath voltage limiters
14.5 Link contact resistance test
14.6 Positive and zero sequence impedances <\/td>\n<\/tr>\n
27<\/td>\n14.7 Pneumatic test <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Electric cables. Internal gas-pressure cables and accessories for alternating voltages up to and including 275 kV (U<\/i>m<\/sub> = 300 kV). Requirements and test methods<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2004<\/td>\n30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":240762,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[493,2641],"product_tag":[],"class_list":{"0":"post-240760","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-29-060-20","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/240760","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/240762"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=240760"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=240760"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=240760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}