SIST ES 202 999 V1.1.1:2012

• Abstract:

  DES/SAFETY-00007

• Status: Published
• Publication Date: 06-Feb-2012
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 09-Jun-2011
• Due Date: 14-Aug-2011
• Completion Date: 07-Feb-2012
• Ref Project: ETSI ES 202 999 V1.1.1 (2010-11) - SAFETY; Remote Power Feeding Installations; Safety requirements for the erection and operation of information technology installations with remote power feeding

Overview

SIST ES 202 999 V1.1.1:2012 specifies comprehensive safety requirements for the erection and operation of information technology installations with remote power feeding. Published by the Slovenski inštitut za standardizacijo (SIST), this standard aligns with ETSI ES 202 999 V1.1.1, focusing on ensuring the protection of personnel and equipment in environments where remote power feeding, either through direct current (d.c.) or alternating current (a.c.), is used to supply IT systems.

Remote power feeding involves transmitting electrical power over telecommunication cables, frequently used in telecom, data centers, and industrial control applications. Due to the inherent risks of electrical power, particularly at higher voltages, adherence to standardized safety practices is critical.

Key Topics

• Scope and Applicability: Covers installations where operating voltages exceed 50 V a.c. (rms) or 120 V d.c. between conductors or between conductor and earth.
• Definitions: Establishes key terms such as remote power feeding equipment, circuits, devices, and the different types of remote power feeding (a.c., d.c., single-ended, double-ended, series, parallel, internal, external).
• Permitted Limits: Specifies maximum voltage and current values for safe operation and details conditions under which these limits may be exceeded.
• General Safety Requirements:
  • Location of remote power equipment in restricted access areas.
  • Monitoring systems for fault detection and signalling.
  • Measures to prevent electrical shock and potential hazards.
• Equipment and Cable Requirements:
  • Labelling cables with appropriate safety symbols.
  • Design features for switching off power at accessible points.
  • Proper grounding and balancing to minimize risks from power mains and other electrical influences.
• Operational Instructions: Guidance on roles, procedures, and necessary precautions, including the need for trained personnel and the prevention of inadvertent power activation.

Applications

The standard is valuable for organizations involved in the deployment, maintenance, and operation of remotely powered information technology and telecommunication systems. Typical use cases include:

• Telecommunications: Remote powering of repeaters, line amplifiers, and other equipment located far from the centralized power source.
• Data Centers: Distributed IT infrastructure relying on power delivered over network cables.
• Railway and Industrial Networks: Powering control and signal equipment via railway or industrial telecommunication lines.
• Public Utilities: Remote power feeding for monitoring, control, and communication equipment in utility networks.

By following SIST ES 202 999 V1.1.1:2012, operators can effectively manage the risks of electrical shock, equipment damage, and operational hazards associated with remote power feeding installations.

Related Standards

To ensure comprehensive electrical safety and compliance, this standard should be used alongside:

• EN 60950-1: Information technology equipment - Safety - General requirements.
• EN 60950-21: Information technology equipment - Safety - Remote power feeding.
• CENELEC EN 60417-1: Graphical symbols for use on equipment.
• ITU-T Directives: Protection of telecommunication lines against harmful effects from electric power.
• ITU-T Recommendation K.10: Low-frequency interference due to unbalance about earth of telecommunication equipment.

SIST ES 202 999 V1.1.1:2012 is an essential reference for safety management in IT and telecom sectors where remote power feeding is used, supporting regulatory compliance, operational safety, and system reliability.

ETSI Standard
SAFETY;
Remote Power Feeding Installations;
Safety requirements for the erection and operation
of information technology installations
with remote power feeding
2 ETSI ES 202 999 V1.1.1 (2010-11)

Reference
DES/SAFETY-00007
Keywords
control, interface, management, power, remote,
safety, system
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2010.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 ETSI ES 202 999 V1.1.1 (2010-11)
Contents
Intellectual Property Rights . 4
Foreword . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 7
4 Limits . 7
4.1 Permitted limit values in maintenance range . 7
4.2 Equipment with which limit values are exceeded according to clause 4.1 . 7
5 General requirements . 7
6 Requirements on equipment and lines . 8
7 Requirements on operating instructions . 9
8 Recommendation of operating instructions (informative). 9
History . 11

ETSI
4 ETSI ES 202 999 V1.1.1 (2010-11)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This ETSI Standard (ES) has been produced by ETSI Technical Committee Telecommunications Equipment Safety
(Safety).
ETSI
5 ETSI ES 202 999 V1.1.1 (2010-11)
1 Scope
The present document contains safety requirements for the erection of information technology installations with remote
power feeding at an operating a.c. voltage exceeding 50 V (rms value) or an operating d.c. voltage exceeding 120 V,
conductor to conductor and/or conductor to earth. It applies in addition to EN 60950-1 [3] and EN 60950-21 [4] and
contains terms, requirements and tests.
If special standards are applicable for installations and parts of installations these shall take precedence; for example
EN 60950-1 [3] and EN 60950-21 [4].
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] CENELEC EN 60417-1 (1999): "Graphical symbols for use on equipment. Overview and
application".
[2] CENELEC EN 60900 (2004): "Live working. Hand tools for use up to 1 000 V a.c. and
1 500 V d.c".
[3] CENELEC EN 60950-1: "Information technology equipment - Safety - Part 1: General
requirements".
[4] CENELEC EN 60950-21: "Information technology equipment - Safety - Part 21: Remote power
feeding".
[5] ITU-T Directives concerning the protection of telecommunication lines against harmful effects
from electric power and electrified railway lines (volume IV).
[6] ITU-T Recommendation K.10: "Low frequency interference due to unbalance about earth of
telecommunication equipment".
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
Not applicable.
ETSI
6 ETSI ES 202 999 V1.1.1 (2010-11)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions given in EN 60950-1 [3],
EN 60950-21 [4] and the following apply:
load power-fed point: load power-fed point extracts electric power from the remote power feeding circuits via its
remote power feeding equipment
remote power feeding: supply of electric power in the form of direct or alternating current to information technology
installations through cables of the associated telecommunication line
remote power feeding cables: cables of a telecommunication line which are used for remote power feeding and may at
the same time be telecommunication cables
NOTE: They are components of the information technology installation.
remote power feeding circuit: circuit which is established by interconnecting remote power feeding devices and cables
to form a functional entity
NOTE: See also RFT circuit (remote feeding telecommunication circuit), RFT-C circuits and RFT-V circuits
according to EN 60950-21 [4].
remote power feeding devices: devices used for remote power feeding, e.g. to supply or extract electric power
remote power feeding equipment: equipment from which the electric power necessary for the remote power feeding
of information technology installations is extracted
NOTE 1: It is a component of the information technology installation.
NOTE 2: For information technology equipment see EN 60950-1 [3].
remote power feeding point: remote power feeding point supplies remote power feeding circuits with electrical current
via its remote power feeding equipment
remote power feeding section: part of remote power feeding circuits located between a remote power feeding point
and the immediately following power-fed point, or between two adjacent power-fed points
RFT-C circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions, the currents in the circuit do not exceed defined values
NOTE: See EN 60950-21 [4].
RFT-V circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions, the voltages are limited and the accessible area of contact is limited
NOTE: See EN 60950-21 [4].
type of remote power feeding: electrical operating mode of the remote power feed in a remote power feeding circuit. It
is specified by particular characteristics of the circuit configuration and power feeding method. A distinctions is made
in particular between the following ones:
• a.c. remote power feeding: power-fed points receive an a.c. supply;
• d.c. remote power feeding: power-fed points receive a d.c. supply;
• double-ended remote power feeding: remote power feeding circuit has two remote power feeding points;
• external remote power f
...

Final draft ETSI ES 202 999 V1.1.1 (2010-09)
ETSI Standard
SAFETY;
Remote Power Feeding Installations;
Safety requirements for the erection and operation
of information technology installations
with remote power feeding
2 Final draft ETSI ES 202 999 V1.1.1 (2010-09)

Reference
DES/SAFETY-00007
Keywords
control, interface, management, power, remote,
safety, system
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2010.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 Final draft ETSI ES 202 999 V1.1.1 (2010-09)
Contents
Intellectual Property Rights . 4
Foreword . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 7
4 Limits . 7
4.1 Permitted limit values in maintenance range . 7
4.2 Equipment with which limit values are exceeded according to clause 4.1 . 7
5 General requirements . 7
6 Requirements on equipment and lines . 8
7 Requirements on operating instructions . 9
8 Recommendation of operating instructions (informative). 9
History . 11

ETSI
4 Final draft ETSI ES 202 999 V1.1.1 (2010-09)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This ETSI Standard (ES) has been produced by ETSI Technical Committee Telecommunications Equipment Safety
(Safety), and is now submitted for the ETSI standards Membership Approval Procedure.
ETSI
5 Final draft ETSI ES 202 999 V1.1.1 (2010-09)
1 Scope
The present document contains safety requirements for the erection of information technology installations with remote
power feeding at an operating a.c. voltage exceeding 50 V (rms value) or an operating d.c. voltage exceeding 120 V,
conductor to conductor and/or conductor to earth. It applies in addition to EN 60950-1 [3] and EN 60950-21 [4] and
contains terms, requirements and tests.
If special standards are applicable for installations and parts of installations these shall take precedence; for example
EN 60950-1 [3] and EN 60950-21 [4].
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] CENELEC EN 60417-1 (1999): "Graphical symbols for use on equipment. Overview and
application".
[2] CENELEC EN 60900 (2004): "Live working. Hand tools for use up to 1 000 V a.c. and
1 500 V d.c".
[3] CENELEC EN 60950-1 (2005): "Information technology equipment - Safety - Part 1: General
requirements".
[4] CENELEC EN 60950-21 (2002): "Information technology equipment - Safety - Part 21: Remote
power feeding".
[5] ITU-T Directives concerning the protection of telecommunication lines against harmful effects
from electric power and electrified railway lines (volume IV).
[6] ITU-T Recommendation K.10 (March 1993): "Low frequency interference due to unbalance about
earth of telecommunication equipment".
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
Not applicable.
ETSI
6 Final draft ETSI ES 202 999 V1.1.1 (2010-09)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions given in EN 60950-1 [3],
EN 60950-21 [4] and the following apply:
load power-fed point: load power-fed point extracts electric power from the remote power feeding circuits via its
remote power feeding equipment
remote power feeding: supply of electric power in the form of direct or alternating current to information technology
installations through cables of the associated telecommunication line
remote power feeding cables: cables of a telecommunication line which are used for remote power feeding and may at
the same time be telecommunication cables
NOTE: They are components of the information technology installation.
remote power feeding circuit: circuit which is established by interconnecting remote power feeding devices and cables
to form a functional entity
NOTE: See also RFT circuit (remote feeding telecommunication circuit), RFT-C circuits and RFT-V circuits
according to EN 60950-21 [4].
remote power feeding devices: devices used for remote power feeding, e.g. to supply or extract electric power
remote power feeding equipment: equipment from which the electric power necessary for the remote power feeding
of information technology installations is extracted
NOTE 1: It is a component of the information technology installation.
NOTE 2: For information technology equipment see EN 60950-1 [3].
remote power feeding point: remote power feeding point supplies remote power feeding circuits with electrical current
via its remote power feeding equipment
remote power feeding section: part of remote power feeding circuits located between a remote power feeding point
and the immediately following power-fed point, or between two adjacent power-fed points
RFT-C circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions, the currents in the circuit do not exceed defined values
NOTE: See EN 60950-21 [4].
RFT-V circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions, the voltages are limited and the accessible area of contact is limited
NOTE: See EN 60950-21 [4].
type of remote power feeding: electrical operating mode of the remote power feed in a remote power feeding circuit. It
is specified by particular characteristics of the circuit configuration and power feeding method. A distinctions is made
in particular between the following ones:
• a.c. remote power feeding: power-fed points receive an a.c. supply;
• d.c. remote power feeding: power-fed points receive a d.c. supply;
• double-ended remote power feeding: remote power feeding
...

SLOVENSKI STANDARD
01-marec-2012
9DUQRVW1DSHOMDYH]DGDOMLQVNRQDSDMDQMH]HOHNWULþQRHQHUJLMR9DUQRVWQH
]DKWHYH]DSRVWDYLWHYLQREUDWRYDQMHQDSHOMDYLQIRUPDFLMVNHWHKQRORJLMH]
GDOMLQVNLPQDSDMDQMHP
SAFETY - Remote Power Feeding Installations - Safety requirements for the erection
and operation of information technology installations with remote power feeding
Ta slovenski standard je istoveten z: ES 202 999 Version 1.1.1
ICS:
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

ETSI Standard
SAFETY;
Remote Power Feeding Installations;
Safety requirements for the erection and operation
of information technology installations
with remote power feeding
2 ETSI ES 202 999 V1.1.1 (2010-11)

Reference
DES/SAFETY-00007
Keywords
control, interface, management, power, remote,
safety, system
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2010.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 ETSI ES 202 999 V1.1.1 (2010-11)
Contents
Intellectual Property Rights . 4
Foreword . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 7
4 Limits . 7
4.1 Permitted limit values in maintenance range . 7
4.2 Equipment with which limit values are exceeded according to clause 4.1 . 7
5 General requirements . 7
6 Requirements on equipment and lines . 8
7 Requirements on operating instructions . 9
8 Recommendation of operating instructions (informative). 9
History . 11

ETSI
4 ETSI ES 202 999 V1.1.1 (2010-11)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This ETSI Standard (ES) has been produced by ETSI Technical Committee Telecommunications Equipment Safety
(Safety).
ETSI
5 ETSI ES 202 999 V1.1.1 (2010-11)
1 Scope
The present document contains safety requirements for the erection of information technology installations with remote
power feeding at an operating a.c. voltage exceeding 50 V (rms value) or an operating d.c. voltage exceeding 120 V,
conductor to conductor and/or conductor to earth. It applies in addition to EN 60950-1 [3] and EN 60950-21 [4] and
contains terms, requirements and tests.
If special standards are applicable for installations and parts of installations these shall take precedence; for example
EN 60950-1 [3] and EN 60950-21 [4].
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] CENELEC EN 60417-1 (1999): "Graphical symbols for use on equipment. Overview and
application".
[2] CENELEC EN 60900 (2004): "Live working. Hand tools for use up to 1 000 V a.c. and
1 500 V d.c".
[3] CENELEC EN 60950-1: "Information technology equipment - Safety - Part 1: General
requirements".
[4] CENELEC EN 60950-21: "Information technology equipment - Safety - Part 21: Remote power
feeding".
[5] ITU-T Directives concerning the protection of telecommunication lines against harmful effects
from electric power and electrified railway lines (volume IV).
[6] ITU-T Recommendation K.10: "Low frequency interference due to unbalance about earth of
telecommunication equipment".
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
Not applicable.
ETSI
6 ETSI ES 202 999 V1.1.1 (2010-11)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions given in EN 60950-1 [3],
EN 60950-21 [4] and the following apply:
load power-fed point: load power-fed point extracts electric power from the remote power feeding circuits via its
remote power feeding equipment
remote power feeding: supply of electric power in the form of direct or alternating current to information technology
installations through cables of the associated telecommunication line
remote power feeding cables: cables of a telecommunication line which are used for remote power feeding and may at
the same time be telecommunication cables
NOTE: They are components of the information technology installation.
remote power feeding circuit: circuit which is established by interconnecting remote power feeding devices and cables
to form a functional entity
NOTE: See also RFT circuit (remote feeding telecommunication circuit), RFT-C circuits and RFT-V circuits
according to EN 60950-21 [4].
remote power feeding devices: devices used for remote power feeding, e.g. to supply or extract electric power
remote power feeding equipment: equipment from which the electric power necessary for the remote power feeding
of information technology installations is extracted
NOTE 1: It is a component of the information technology installation.
NOTE 2: For information technology equipment see EN 60950-1 [3].
remote power feeding point: remote power feeding point supplies remote power feeding circuits with electrical current
via its remote power feeding equipment
remote power feeding section: part of remote power feeding circuits located between a remote power feeding point
and the immediately following power-fed point, or between two adjacent power-fed points
RFT-C circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions, the currents in the circuit do not exceed defined values
NOTE: See EN 60950-21 [4].
RFT-V circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions, the voltages are limited and the accessible area of contact is limited
NOTE: See EN 60950-21 [4].
type of remote power feeding: electrical operating mode of the remote power feed in a remote power feeding circuit. It
is spe
...