GB 6830-2025 The tolerable limits of danger on telecommunication lines from power lines

Scope

This document specifies the allowable values of dangerous voltages on telecommunication lines and dangerous currents flowing through human bodies when telecommunication lines are subject to dangerous influences from high-voltage power lines.
This document applies to various types of AC power lines and AC electrified railway contact networks, etc., which may have dangerous effects on adjacent telecommunication lines under the following states or conditions:
a) Fault state of high-voltage power lines: —— One phase of a three-phase power line with a directly grounded neutral point is short-circuited to ground; —— One phase of a three-phase power line with an indirectly grounded neutral point is short-circuited to ground; —— Two phases of a three-phase power line with an indirectly grounded neutral point are short-circuited to ground at different locations simultaneously; —— Short-circuiting and grounding of AC electrified railway contact network conductors; —— Short-circuiting and grounding of other asymmetric power line conductors.
b) Normal operating state of high-voltage power lines: —— Normal operation of AC electrified railway contact networks; —— Normal operation of other asymmetric power lines.

Development Information

Replace the following standards

Related Standards