IS 5553( Part 4 ) t 1983
Indian Standard
( Reaffirmed 1995 )
REACTORS - SPECIFICATION
PART 4 DAMPING REACTORS
(
First Revision )
First Reprint MARCH 1996
UDC
621’316’935
@I BIS 1990
BUREAU
MANAK
Se+vnbcr
1990
OF INDlAN
BHAVAN,
STANDARDS
9 BAHADUR SHAH
NEW DELHI 110002
ZAFAR
MARG
Price Group 1
Transformers
Sectional
Committee,
ETD
16
FOREWORD
This Indian Standard ( Part 4 ) ( First Revision ) was adopted by the Bureau of Indian Standards
on 22 December
1989, after the draft finalized by the Transformers
Sectional Committee had
been approved by the Electrotechnical
Division Council.
This standard was first published in 1970. This revision
bring it in line with the IEC Pub 289 ( 1988) ‘Reactors’.
In this revision the requirements
for reactance
Part 1
General
Part 2
Shunt reactors
Part 3
Current
Part 4
Damping
Part 5
Tuning reactors
Part 6
Earthing
Part 7
Arc suppression reactors
Part 8
Smoothing
limiting
and neutral
has been undertaken
with a view to
have been covered in eight parts as follows:
earthing
reactors
reactors
transformers
( Neutral
couplers )
reactors
This standard has been -based on IEC Pub 289 ( 1988) : ‘Reactors
reactors’, issued by the International
Electrotechnical
Commission.
This part shall be read in conjunction with Part 1 of this standard.
is also given inPart
1 of this standard.
Section
Four
Damping
A list of referred
standards
Indian Standard
REACTORS-SPECIFICATION
PART
(
4
DAMPING
REACTORS
First Revision )
shall be selected at least equal to the
maximum permissible current of the associated
capacitor battery or battery section.
reactor
1 SCOPE
1.1 This standard
( Part 4 ) covers damping
reactors which are used particularly for limiting
the inrush currents occuring during the switching of capacitor banks to ac networks.
They
are connected in series with the capacitors.
During normal operation
the capacitor rated
current flows through the damping
reactors.
The maximum permissible ( overload ) current
of the damping reactor is equal to the corresponding value of the capacitor bank as called
for in the relevant standards for power ( shunt )
capacitors.
NOTE - For special capacitor applications, such as in
static var sources or HVDC
systems the currents as
specified in the power capacitor
standards
are not
always applicable.
1.1.1 Damping reactors are usually single or
three-phase,
dry type natural
(self)
cooled,
tvithoht iron core, for indoor
or
outdoor
installation.
NOTE - The maximum permissible current according
to IS 2834 : 1981 power capacitor is a current with the
rms value equal to 1’3 times the value obtained at rated
sinusoidal voltage across the capacitor.
4 INRUSH
4.1 The Rated Inrush Current-The
rated
inrush current shall be selected to cover all
recognized
cases of switching
the capacitor
battery or battery sections. The relevant inrush
resonant frequency
shall be specified in the
inquiry.
The manufacturer
shall on request
supply information about the expected Q-factor
The
of the damping reactor at this frequency.
damping
reactor
shall be capable
of withstanding the dynamic effects of this rated inrush
current. :
NOTES
1 The thermal
without
2 TERMINOLOGY
2.0 For the purpose of this standard
ing definitions shall apply.
2.1 Rated Continuous
CURRENT
effect of the inrush current
significance.
is normally
2 If-the damping reactor is required to withstand overcurrent in excess of the rated inrush current, for example,
due to capacitor faults the ~magnitude and duration of
such overcurrent shall be specified.
the follow-
5 INSULATION
Current ( IN )
LEVEL
The rated inrush current is the peak value of
the highest inrush current
specified
for the
damping reactor.
5.1 Unless otherwise
specified the insulation
level shall correspond
to the highest voltage
for equipment Urn of the system in which the
damping reactor
is to be installed.
If one
terminal of the damping reactor is intended to
be directly
earthed,
non-uniform
insuIation
may be applied by agreement
between the
manufacturer
and the purchaser.
2.3 Rated Inductance
6 TEMPERATURE
The rms value of the current
the damping reactor.
flowing
through
2.2 Rated Inrush Current (lin )
( LN )
The inductance
value at system
specified ~for damping reactor.
frequency
6.1 For damping reactors the temperature-rise
limits given in 3 of IS 2026 ( Part 2 ) : 1977,
shall be applicable.
2.4 Q-Factor
7 RATING
The ratio of reactance
to resistance
for the
damping
reactor
at specified frequency
and
temperature.
The
rated
continuous
The entries on the plate shall be indelibly
marked ( for -example, by etching, engraving
or stamping).
Current
current
PLATES
7.1 Each
reactor
shall be provided
with a
rating plate of weatherproof
material, fitted in
a visible position,
showing the appropriate
items as follows:
3 RATING
3.1 Rated Continuous
RISE
of the damping
1
IS 5553(Part 4) : 1999
7.1.1 The following information
is to be given
on the plate in all cases.
8.2 Routine
The following shall constitute the routine test:
a) Type of reactor,
4
b) Number of this specification,
c) Indication
of insulation
resistance
[see 16.6 of IS 2026 ( Part 1) : 1977 1,
serial number,
e) Year of manufacture,
f) Insulation level,
g) Rated
Measurement
of
winding
resistance
[see 8.6 of IS 2026 (Part 1) : 1977 J,
b) Measurement
of the source of manufacture,
d) Manufacturer’s
Tests
frequency,
4
Measurement
of inductance
4
Separate-source
voltage withstand
test
( see 8.6 of Part 3 of this standard ), and
4
Inter-turn
( see 8.5 ).
cover
voltage
h) Rated inductance,
8.3 Special
j) Rated -continuous current,
The following shall constitute
k) Temperature
m) Rated inrush current,
n) *factor
b) Q-factor
at a specified frequency,
and
8 TESTS
current
the special tests:
withstand
measurement
8.5 hrterturn
8.0 General requirements for routine, type and
special tests, provisions given in 16.1 of IS 2026
( Part 1) : 1977 shall apply.
test
( see 8.6 ),
( see 8.7 ).
Voltage
Withstand
Test
This test shall be performed in general accordance with 8.7 of Part 3 of this standard, with
following exception:
8.1 Type Tests
4
test
8.4 The measurement
may be made at any
current value suitable, or by a bridge method.
The rated inductance value is referred to system
frequency.
p) Total mass.
The following shall constitute
withstand
Tests
a) Inrush
and
rise,
( see 8.4 ),
The test voltage shall be twice
occurring at rated inrush current.
type tests:
Measurements
of
winding
resistance
[ see 16.2 of IS 2026 ( Part 1 > : 1977 I,
8.6 Separate-Source
Test
of insulation
resistance
1.see 16.6 of IS 2026 ( Part 1) : 1977 1,
The test is to be made at system frequency
in accordance
with 8.10 of Part 3 of this
standard.
b) Measurement
4
Measurement
of inductance
4
Separate-source
voltage
withstand
( see 8.6 of Part 3 of this standard ),
test
4
Inter-turn
( see 8.5 ),
withstand
test
f)
Temperature
rise test
of this standard ), and
d
Lightning
test ( see 8.9 of Part 3 of
__
_ impulse
_.
this standard 1.
overvoltage
( see 8.4 ),
8.7 Q-factor
Voltage
the voltage
Withstand
Measurement
The measurement
is made by the bridge
method at the specified inrush resonant frequency ( see 5.5 of Part 5 so far as applicable ).
9 TOLERANCE
( SCG8.8 of Part 3
9.1 The tolerance shall be as follows:
+
_ 20%
o 0L ofrated inductance.
” ,”
2
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implementing the standard, of necessary details, such as symbols and sizes, type or grade designations.
Enquiries relating to copyright be addressed to the Director (Publications), BIS.
Review of Indian Standards
Amendments are issued to standards as the need arises on the basis of comments. Standards are also
reviewed periodically; a standard along with amendments is reaffirmed when such review indicates that
no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users
of Indian Standards should ascertain that they are in possession of the latest amendments or edition by
referring to the latest issue of ‘BIS Handbook’ and ‘Standards Monthly Additions’.
This Indian Standard has been developed from Dot : No. ETD 16 ( 2777 )
Amendments Issued Since Publication
Amend No.
Text Affected
Date of Issue
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