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Database: 189760 (18 Oct 2025)
TB/T 1849-1987 English PDF
US$279.00 ยท In stock
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TB/T 1849-1987
: Insulation Clearance for Contact Network in Tunnel
Status: Obsolete
Standard ID
Contents [version]
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Standard Title (Description)
Status
PDF
TB/T 1849-1987
English
279
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Insulation Clearance for Contact Network in Tunnel
Obsolete
TB/T 1849-1987
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Basic data
Standard ID
TB/T 1849-1987 (TB/T1849-1987)
Description (Translated English)
Insulation Clearance for Contact Network in Tunnel
Sector / Industry
Railway & Train Industry Standard (Recommended)
Classification of Chinese Standard
S32
Word Count Estimation
3,35
Date of Issue
1/16/1988
Date of Implementation
7/1/1988
Regulation (derived from)
According to the TB directory and review results, revise, still in use, the conditions are ripe for revision catenary insulation gap
Summary
This standard applies to single-phase power frequency electric railway tunnel in the 25kV catenary insulating gap, altitude not exceeding 1000m, the general environment. In extremely wet and heavy pollution (eg offshore, a busy section of the steam locomotive, serious industrial pollution, leaking hanging ice) and other harsh environments, while the use of this standard shall not be lower than normal static gap.