CENELEC
Project
| Reference | prEN 50526-2:2012 |
|---|---|
| Title | Railway applications - Fixed installations - D.C. surge arresters and voltage limiting devices - Part 2: Voltage limiting devices |
| Project Number | 21094 |
| Abstract/Scope | This European Standard applies to Voltage Limiting Devices (VLDs) to be applied in d.c. traction systems in order to comply with protective provisions against electric shock from d.c., and mixed a.c. – d.c. voltages, in accordance with EN 50122, taking into account stray current provisions. VLDs operate in a way as to connect the track return circuit of d.c. railway systems to earthing system or conductive parts within the overhead contact line zone or current collector zone in order to: 1) prevent impermissible touch voltages caused by train traffic or short circuits; and/or 2) prevent impermissible touch voltages by reducing the fault circuit impedance and thus causing tripping of the circuit breaker by overcurrent. |
| Status |
Enquiry stage
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Status
| Current Stage code | 4060 |
|---|---|
| Current Stage code date | 2012-09-10 |
| Current Stage code deadline | 2012-10-01 |
| Deadline date for vote |
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Details
| IEC Technical Body | |
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| Reference Document | |
| ICS | 29.120.50 - Fuses and other overcurrent protection devices 29.280 - Electric traction equipment |
| Keywords | Railway; Fixed Installations; Surge arrester; Voltage; Limiting device |
| Note | 2012-02-07 - Enquiry allocated to aclausse@cencenelec.eu * D129/042: NWI approved * Not to be offered to IEC (see D126/046) * Renumbered from prEN 50123-8 * D143/C025: 2nd extension of the deadline for submission of draft for Formal Vote approved |
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History
Implementation Dates
| date of Ratification (DOR) (1) | |
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| date of Availability (DAV) (2) | |
| date of Announcement (DOA) (3) | - |
| date of Publication (DOP) (4) | - |
| date of Withdrawal (DOW) (5) | - |
Relations
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| Normative reference (6) |
(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved
(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat
(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level
(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement
(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn
(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.
