IEC 61334-3-21:1996
Distribution automation using distribution line carrier systems - Part 3: Mains signalling requirements - Section 21: MV phase-to-phase isolated capacitive coupling device
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About This Item
IEC 61334-3-21:1996 defines the technical reference for distribution automation using distribution line carrier systems, specifically for mains signalling requirements for an MV phase-to-phase isolated capacitive coupling device. In practical terms, it is relevant when evaluating how signalling equipment interfaces with medium-voltage networks and how the coupling device supports dependable communication on power lines. For engineering, testing, and procurement teams, IEC 61334-3-21:1996 helps anchor technical review, documented evaluation, and compliance workflows around a clearly identified coupling arrangement.
IEC 61334-3-21:1996 standard overview
This document is the primary reference for the MV phase-to-phase isolated capacitive coupling device within the IEC 61334 series on distribution automation using distribution line carrier systems. Its likely purpose is to define the signalling-related expectations that apply to this coupling method so that equipment can be assessed against a consistent technical basis. Organizations involved in technical validation, conformity assessment, or engineering documentation may use it to support product evaluation and regulatory preparation for distribution network applications.
Applications of IEC 61334-3-21:1996
IEC 61334-3-21:1996 is most relevant in projects involving medium-voltage distribution systems that use line carrier signalling for automation or control functions. It may be used during specification review, laboratory evaluation, or system integration work where a phase-to-phase isolated capacitive coupling device is selected for mains signalling. Typical users include utilities, equipment manufacturers, test laboratories, and procurement teams that need a technical document to support interoperability checks, installation planning, and quality workflows for distribution network communications.
Why IEC 61334-3-21:1996 matters
Using IEC 61334-3-21:1996 can reduce risk by giving engineers and compliance teams a clear technical basis for assessing a coupling device intended for MV mains signalling. It supports testing consistency, operational consistency, and more structured conformity assessment preparation by aligning evaluation activities with a defined reference. For procurement and acceptance processes, the document can help confirm that the selected equipment fits the expected engineering specification and is suitable for documented technical review before deployment.
- Medium-voltage distribution line carrier signalling for automation and control
- Phase-to-phase isolated capacitive coupling device requirements for mains signalling use
- Technical reference for laboratory evaluation and verification activities
- Useful for procurement review, conformity assessment, and engineering documentation
- Publication Date: 1996-03-28
- Standard Status: Original
- Publisher: IEC
- Edition: 1
- This Version: IEC 61334-3-21:1996 (1996-03-28)
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