GB6830-1986
The tolerable limits of danger ontelecommunication lines from power lines
电信线路遭受强电线路危险影响的容许值
GB 6830-1986 is a current mandatory Chinese national standard for The tolerable limits of danger ontelecommunication lines from power lines. It appears in the Electronics compliance cluster with a product safety focus and has an implementation date of Oct 1, 1987.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to the dangerous effects caused by AC power lines and AC electrified railway contact networks on adjacent telecommunication lines. It covers scenarios involving overhead telecommunication wires, telecommunication cables, and broadcast transmission cables under both fault and normal operating conditions. It is essential for engineers designing power and telecommunication infrastructure to ensure safe proximity and interference management.
Technical requirements
The standard specifies the tolerable limits for dangerous currents induced by electric fields. When a human body touches adjacent communication wires under specific fault or normal conditions, the induced current must not exceed the defined safety threshold. For overhead telecommunication lines, the standard defines the maximum allowable longitudinal electromotive force (EMF) caused by magnetic induction. It distinguishes between fault states (differentiating between general and high-reliability power lines) and normal operating states, setting strict voltage ceilings to protect personnel and equipment. For cable telecommunication lines, the allowable longitudinal EMF is calculated based on the cable's DC or AC test voltages, adjusted for remote power supply configurations. Engineers must ensure that potential differences from ground currents and combined magnetic/ground current effects do not exceed the specified safety margins. If induced values exceed the limits, the standard outlines mandatory protective measures. These include increasing separation distances, adding shielding, limiting short-circuit currents, and upgrading to shielded or fiber optic cables.
Testing methods
The standard primarily involves calculation and evaluation procedures rather than physical laboratory testing. Engineers must calculate the induced longitudinal EMF and ground potential rise under simulated fault and normal conditions. Compliance is verified by comparing these calculated values against the specified tolerable limits. If limits are exceeded, mitigation strategies must be evaluated and implemented.
FAQs
What types of telecommunication lines are covered under GB 6830-1986?
It covers overhead telecommunication wires, telecommunication cables, wired broadcast overhead lines and cables, and broadcast transmission cables located near strong power lines.
Does the standard differentiate between fault states and normal operation?
Yes, the standard sets distinct tolerable limits for both fault states and normal operating states of power lines and electrified railways, with fault states generally allowing higher temporary voltage limits.
What happens if the induced voltage exceeds the tolerable limits?
If limits are exceeded, engineers must implement protective measures such as increasing the distance between lines, adding shielding, restricting short-circuit currents, or upgrading telecommunication lines to shielded or fiber optic cables.
The summary above provides a high-level overview of GB 6830-1986. To ensure complete compliance for your power or telecommunication projects in the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 6830-1986 today to access all detailed parameters, calculation formulas, and protective measure requirements.
Applicability hints
- Type
- Safety
- CCS
- M04
- ICS
- 33.040.50
- Competent department
- Ministry of Industry and Information Technology
- Technical committee
- Ministry of Industry and Information Technology
Relationships
Replaced by:GB 6830-2025 (Upcoming)