EN 60143-2:1994
(Main)Series capacitors for power systems - Part 2: Protective equipment for series capacitor banks
Series capacitors for power systems - Part 2: Protective equipment for series capacitor banks
Covers protective equipment for series capacitor banks, with a size larger than 10 Mvar per phase. Protective equipment is the main circuit apparatus and ancillary equipment, which are part of a series of capacitor installations, but which are external to the capacitor part itself.
Reihenkondensatoren für Starkstromanlagen - Teil 2: Schutzeinrichtungen für Reihenkondensatorbatterien
Condensateurs série destinés à être installés sur des réseaux - Partie 2: Matériel de protection pour les batteries de condensateurs série
Concerne les matériels de protection pour les batteries de condensateurs série, de puissance supérieure à 10 Mvar par phase. Le matériel de protection étant l'appareillage de circuit principal et du matériel auxiliaire, qui font partie de l'installation des condensateurs série, mais qui sont à l'extérieur de la partie constituée par les condensateurs eux-mêmes.
Series capacitors for power systems - Part 2: Protective equipment for series capacitor banks
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2000
Series capacitors for power systems - Part 2: Protective equipment for series
capacitor banks
Series capacitors for power systems -- Part 2: Protective equipment for series capacitor
banks
Reihenkondensatoren für Starkstromanlagen -- Teil 2: Schutzeinrichtungen für
Reihenkondensatorbatterien
Condensateurs série destinés à être installés sur des réseaux -- Partie 2: Matériel de
protection pour les batteries de condensateurs série
Ta slovenski standard je istoveten z: EN 60143-2:1994
ICS:
31.060.70 0RþQRVWQLNRQGHQ]DWRUML Power capacitors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
CEI
NORME
IEC
INTERNATIONALE
143-2
INTERNATIONAL
Première édition
STANDARD
First edition
1994-07
Condensateurs série destinés à être installés
sur des réseaux —
Partie 2:
Matériel de protection pour les batteries
de condensateurs série
—
Series capacitors for power systems
Part 2:
Protective equipment for series capacitor banks
réservés — Copyright — all rights reserved
© CEI 1994 Droits de reproduction
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143-2 ©IEC:1994 – 3 –
CONTENTS
Page
FOREWORD 7
Clause
SECTION 1: GENERAL
1.1 Scope and object
1.2 Normative references
1.3 Definitions
SECTION 2: QUALITY REQUIREMENTS AND TESTS
2.1 Overvoltage protector
2.1.1 Protective spark gap 27
2.1.1.1 Purpose 27
2.1.1.2 Classification
2.1.1.3 Tests
2.1.2 Non-linear resistor (varistor)
2.1.2.1 Purpose
2.1.2.2 Classification
2.1.2.3 Tests
2.2 By-pass circuit-breaker
2.2.1 Purpose
2.2.2 Classification
2.2.3 Tests
2.3 Disconnectors 49
2.3.1 Purpose 49
2.3.1.1 By-pass disconnector
2.3.1.2 Series disconnector
2.3.2 Classification
2.3.3 Tests 49
2.4 Current-limiting damping equipment
2.4.1 Purpose
2.4.2 Classification
2.4.3 Tests
2.5 Discharge reactor
2.5.1 Purpose
2.5.2 Classification
2.5.3 Tests
143-2 ©IEC:1994 — 5 —
Clause Page
61 2.6 Voltage transformer
2.6.1 Purpose
61 2.6.2 Classification
2.6.3 Tests
2.7 Current transformer
2.7.1 Purpose
2.7.2 Classification
2.7.3 Tests
2.8 Signal column
2.8.1 Purpose
2.8.2 Classification
2.8.3 Tests
2.9 Relay protection, control equipment and platform to ground
communication equipment
2.9.1 Purpose
2.9.2 Classification
2.9.3 Tests
SECTION 3: GUIDE
3.1 General
71 3.2 Specification data for series capacitors
73 3.3 Protective spark gap
75 3.4 Non-linear resistor (varistor)
3.5 By-pass circuit-breaker
3.6 Disconnectors 91
3.7 Current-limiting damping equipment 91
3.8 Discharge reactor 95
3.9 Voltage transformer
3.10 Current transformer 97
3.11 Relay protection, control equipment and platform to ground communication
equipment 97
3.12 Precommissioning tests
3.13 Commissioning tests 99
Annex A— Bibliography
143-2 ©IEC:1994 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
SERIES CAPACITORS
FOR POWER SYSTEMS -
Part 2: Protective equipment for series
capacitor banks
FOREWORD
The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
1)
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international cooperation on all questions concerning standardization in the electrical and
electronic fields. To this end and in addition to other activities, the IEC publishes International Standards.
Their preparation is entrusted to technical committees; any IEC National Committee interested in
the subject dealt with may participate in this preparatory work. International, governmental and
non-governmental organizations liaising with the IEC also participate in this preparation. The IEC
collaborates closely with the International Organization for Standardization (ISO) in accordance with
conditions determined by agreement between the two organizations.
The formal decisions or agreements of the IEC on technical matters, prepared by technical committees on
2)
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
They have the form of recommendations for international use published in the form of standards, technical
3)
reports or guides and they are accepted by the National Committees in that sense.
In order to promote international unification, IEC National Committees undertake to apply IEC International
4)
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
5)
equipment declared to be in conformity with one of its standards.
International Standard IEC 143-2 has been prepared by IEC technical committee 33:
Power capacitors.
The text of this standard is based on the following documents:
DIS Report on Voting
33(CO)115 33(CO)124
Full information on the voting for the approval of this standard can be found in the report
on voting indicated in the above table.
IEC 143 consists of the following parts, under the general title: Power capacitors:
143: 1992, Series capacitors for power systems (when revised, this standard will become
–
IEC 143-1);
143-2: 1994, Series capacitors for power systems – Part 2: Protective equipment for series
–
capacitor banks.
Other parts are under consideration.
143-2 © IEC:1994 - 9 -
SERIES CAPACITORS
FOR POWER SYSTEMS -
Part 2: Protective equipment for series
capacitor banks
Section 1: General
1.1 Scope and object
This pa rt of IEC 143 covers protective equipment for series capacitor banks, with a size
larger than 10 Mvar per phase. Protective equipment is defined as the main circuit appa-
ratus and ancillary equipment, which are part of a series capacitor installation, but which
are external to the capacitor part itself. The recommendations for the capacitor part are
given in IEC 143. The protective equipment is mentioned in clauses 1.3 and 7.6 of
IEC 143.
The protective equipment, treated in this standard, comprises the following items listed
below.
- overvoltage protector,
- protective spark gap,
non-linear resistor (varistor),
- by-pass circuit-breaker,
disconnectors,
- current-limiting damping equipment,
- discharge reactor,
- voltage transformer,
- current transformer,
- signal column,
relay protection, control equipment and platform to ground communication
equipment.
See figure 1.
Principles involved in the application and operation of series capacitors are given in
section 3.
Examples of fault scenarios are given in section 3.
Examples of protective schemes utilizing different overvoltage protectors are given in
clause 2.1.
143-2 ©IEC:1994 -11 -
Module 1 Module N
Segment AN
Segment Al !
4 4 Phase
Phase A
• bank A
F
Segment B1 Segment BN
Phase
Phase B
bank B
°\
Segment CN
Segment Cl
Phase
Phase C
bank C
L L
IEC 673194
1 Assembly of capacitor units,
2 Main protective equipment for a segment,
3 By-pass disconnector,
4 Series disconnector.
Figure 1 - Series capacitor bank nomenclature
NOTE - Capacitor fuses are not treated in this standard, since they are treated in IEC 143 and IEC 595.
The object of this standard is:
to formulate uniform rules regarding pe rformance, testing and rating,
-
to illustrate different kinds of overvoltage protectors,
-
- to provide a guide for installation and operation.
1.2 Normative references
The following normative documents contain provisions which, through reference in this
text, constitute provisions of this part of IEC 143. At the time of publication, the editions
indicated were valid. All normative documents are subject to revision, and pa rties to agree-
ments based on this part of IEC 143 are encouraged to investigate the possibility of apply-
ing the most recent editions of the normative documents indicated below. Members of IEC
and ISO maintain registers of currently valid International Standards.
The following IEC publications and reports are quoted in this standard:
-13 -
143-2 ©IEC:1994
4: Measurement of pa rtial discharges
IEC 44-4: 1980, Instrument transformers - Pa rt
International Electrotechnical Vocabulary (IEV)- Chapter 436: Power
IEC 50(436): 1990,
Capacitors
High-voltage alternating-current circuit-breakers
IEC 56: 1987,
High-voltage test techniques - Part 1: General definitions and test
IEC 60-1: 1989,
requirements
Basic environmental testing procedures - Part 2: Tests - Test Db and
IEC 68-2-30: 1980,
guidance: Damp heat, cyclic (12 + 12 hour cycle)
IEC 76-1, 1993, Power transformers - Part 1: General
IEC 99-1: 1991, Surge arresters - Part 1 : Non-linear resistor type gapped arresters for
a.c. systems
IEC 99-4: 1991, Surge arresters - Part 4: Metal-oxide surge arresters without gaps for a.c.
systems
IEC 129: 1984, Alternating current disconnectors and earthing switches
Series capacitors for power systems
IEC 143: 1992,
IEC 185: 1987, Current transformers
Voltage transformers
IEC 186: 1987,
Electrical relays - Part 6: Measuring relays and protection equipment
IEC 255-6: 1988,
IEC 289: 1988, Reactors
rts 1-2): 1993, Tests on insulators of ceramic material or glass for overhead
IEC 383 (Pa
lines with a nominal voltage greater than 1 000 V
Internal fuses for series capacitors
IEC 595: 1977,
Amendment 2, 1987
IEC 654 (Parts 1-4): 1979-1987, Operating conditions for industrial-process measurement
and control equipment
Common clauses for high-voltage switchgear and controlgear standards
IEC 694: 1980,
1: Generic specification
IEC 794-1: 1993, Optical fibre cables - Part
2: Product specifications
IEC 794-2: 1989, Optical fibre cables - Part
NOTE - No standard exists for varistors for series capacitors (S.C.). The relevant tests for series
capacitors varistors are therefore dealt with in this standard.
– 15 --
143-2©IEC:1994
1.3 Definitions
of IEC 143, the following definitions apply:
For the purpose of this pa rt
1.3.0 definitions of capacitor parts and accessories: They are in accordance with
IEC 143.
Supplementary gap which may be set to spark over at a voltage
1.3.1 back-up gap:
level higher than the protective level of the primary protective device, and which is
normally placed in parallel with the primary protective device.
1.3.2 bank protection: General term for all protective equipment for a capacitor bank,
or part thereof.
1.3.3 by-pass current: Current flowing through the by-pass device or devices in
parallel with the series capacitor. This current can either be a fault current or a normal
current.
Device such as a switch or a circuit-breaker used in parallel with
1.3.4 by-pass device:
a series capacitor and its overvoltage protector to shunt line current for a specified time,
or continuously. Besides by-passing the capacitor, this device may also have the capabil-
ity of inserting the capacitor into a circuit and carrying a specified current.
Device to short-circuit the series capacitor after it is
1.3.5 by-pass disconnector:
by-passed by the by-pass device.
fault current: Current flowing through the by-passed series capacitor
1.3.6 by-pass
bank caused by a fault on the line.
gap): Gap, or system of gaps, to protect either the
1.3.7 by-pass gap (protective
capacitor (Type K) against overvoltage or the non-linear resistor (Type M) against
rts for a specified time.
overload by carrying load or fault current around the protected pa
Device that requires all three poles of the by-pass
1.3.8 by-pass interlocking device:
device to be in the same open or closed position.
1.3.9 capacitance unbalance protection: Device to detect unbalance in capacitance
between capacitor groups within a phase, such as that caused by blown capacitor fuses or
faulted capacitors, and to initiate an alarm or the closing of the by-pass device, or both.
s the capacitor/rack assemblies and all
1.3.10 capacitor platform: Structure that suppo rt
associated equipment and protective devices, and is supported on insulators compatible
with phase-to-earth insulation requirements.
1.3.11 capacitor switching step: See module.
1.3.12 continuous operating voltage (COV = MCOV) (U c) (of a varistor): The (Maximum)
value of power
Continuous Operating Voltage, COV, is the designated permissible r.m.s.
143-2 ©IEC:1994 – 17 –
r.m.s. frequency voltage that may be applied continuously between the varistor terminals.
NOTES
1 COV of the series capacitor varistor is usually equal to the rated voltage of the series capacitor. This
definition is different from the definition of COV for a ZnO arrester according to IEC 99-4.
2 Consideration to short-time overvoltages of the series capacitor, such as voltages produced by swing
currents and overload currents, should be taken into account when the protective level of the varistor is
determined.
limiting da
...
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