m m n
-A
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1O018
ANSI@
C50.13-1989
Revision of
ANSI C50.13-1977
American National Standard
for Rotating Electrical Machinery-
Cylindrical-Rotor Synchronous Generators
Secretariat
National Electrical Manufacturers Association
Approved January 23,1989
American National Standards Institute, Inc
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A N S I C50.13 87
0 7 2 i 1 5 0 OOOb1838 3 E
’
of an American National Standard requires verification by ANSI that the reAmerican Approval
quirements for due process, consensus, and other criteria forapproval have been met by
National the standards developer.
Standard Consensus is established when, in the judgment of theANSI Board of Standards Review,
substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than asimple majority, but not necessarily unanimity. Consensus requires that all views and objections beconsidered, and that a concerted
effort be made toward their resolution.
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The American National Standards Institute does notdevelop standards and will in no circumstances give an interpretation of anyAmerican National Standard.Moreover, no person shall have theright or authority toissue an interpretation ofan American National
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Foreword
(This Foreword is not part of American National StandardC50.13-1989.)
This standard is a revision of American National Standard Requirements for
Cylindrical-Rotor Synchronous Generators,ANSI C50.13-1977. The major change
in the 1989 version of this standard is the additionof a subsection dealing with the
possible effects of system disturbances on generatorcomponents.
It is the intent of the Accredited Standards Committee on RotatingElectrical
Machinery, C50, to revise and update this standard at regular intervals.
Suggestions for improvement of this standard will be welcome.They shouldbe sent
to the National Electrical Manufacturers Association, 2101 L Street, NW, Suite
300, Washington, DC 20037.
This standardwas processed and approved for submittal to ANSI by Accredited
Standards Committee on Rotating Electrical Machinery, C50. Committee approval
of the standarddoes not necessarily imply that all committee members voted for its
approval. At the time it approved this standard, theC50 Committee had the following members:
Paul I. Nippes, Chair
James D. Raba, Secretary
Organization Represented
Name of Representative
.............................. D. C. Azbill
.......................
Stanley C. Houk
.........................
C. James Erickson
................... Gerald Schmid
...................... David L. Gebhart (Chair)
American Petroleum Institute
Association of Iron and Steel Engineers
Chemical Manufacturers Association
Crane Manufacturers Association of America
Electrical Apparatus Service Association
Electric Light and Power Group
............................
.................................
......................................
..........................................
FactoryMutualSystems
Hydraulic Institute
Institute of Electrical and Electronics
Engineers
National Electrical ContractorsAssociation
National Electrical ManufacturersAssociation
....................
............... .
............................
....................................
..............................
Society of Automotive Engineers
Technical Associationof the Pulp
and Paper Industry
U S . Department of the Navy
Individual Members
Lome W. Brotherton
Joseph P. Fifzgerald
Bjorn M. Kaupang
Paul 1. Nippes
Joseph E. Shea
J. C. White
Perry A. Weyant
t
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Wilson A. Giles
Preben Christensen (Alt)
Joseph J. Wilkes (Chair)
D. E. Loberg
Arnold R. Roby
John S. Swavel, J r
Glen H. Griffin (Alt)
J. L. Koepfinger (Alt)
David E. Soffrin (Alt)
Demitrious M. Karydas
Robert G. Crawford
S. B. Kuznefsov (Chair)
Brian E. B. Gott
M. H. Hesse
Peter R. Landrieu
William R. McCown
James A. Oliver
Nirmal K. Ghai (Alt)
Charles J. Hart
Sohn Keinz (Chair)
Joseph E. Martin
Dale Rawlings
Walter G. Stiffler
John Krueger
Robert A. Richardson
Harold J. Blakney
Reagan Clark
~-
"
A N S I C 5 0 - L 3 87
072Lt350 0004bYO
L
Subcommittee C50.1 on Synchronous Machines, which developed this standard,
had the following members:
Joseph J. Wilkes, Chair
James Raba, Secretary
COPYRIGHT American National Standards Institute
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Charles J. Czech
Joseph P. Fitzgerald
Nirmal K. Ghai
James J. Gibney, I11
Peter B. Goetz
Brian E. B. Gott
Glen H. Griffin
Howard E. Jordan
P. R. Landrieu
J. M. Mayher
William R. McCown
James R. Michalec
James A. Oliver
Arnold R. Roby
Perry A. Weyant
=3
A N S I C50.33 8 9 W 072Ll350 0004643 3
Contents
PAGE
SECI'ION
1. scope ........................................................................................................................
.
3.
2
4
Referenced American National Standards
...............................................................
7
7
Classification ............................................................................................................
3.1StatorTypes
....................................................................................................
3.2 RotorTypes ....................................................................................................
7
7
7
.
Usual Service Conditions .........................................................................................
4.1 VariationfromRatedVoltage
4.2VariationfromRatedHydrogenPressure
......................................................
4.3VariationfromRatedFrequency
....................................................................
7
7
7
7
.
Rating .......................................................................................................................
5.1 Outputrating ...................................................................................................
5.2
Capability
.......................................................................................................
5.3
Voltage
Ratings
.............................................................................................
7
7
8
8
.
Temperature Rise .....................................................................................................
6.1
Air-Cooled
Machines
.....................................................................................
6.2Hydrogen-CooledMachines
...........................................................................
8
8
9
.
Requirements for Abnormal Conditions ..................................................................
7.1 Armature Winding Short-Time Thermal Requirements .................................
7.2 Field Winding Short-Time Thermal Requirements ........................................
7.3 Rotor Short-Time Thermal Requirements for Unbalanced Faults
7.4MechanicalRequirementsforShortCircuits
.................................................
7.5ContinuousUnbalanceRequirements
............................................................
7.6RequirementsforSystemDisturbances
.........................................................
11
11
Efficiency .................................................................................................................
11
Overspeed ................................................................................................................
11
5
6
7
.
9.
8
........................................................................
9
9
9
................. 9
11
10. Telephone Influence Factor.....................................................................................
11
11
12
12
12
.
12. Direction of Rotation ...............................................................................................
12
13. Nameplate Marking..................................................................................................
12
14. Performance Specification Forms............................................................................
12
10.1Balanced .........................................................................................................
10.2ResidualComponent ......................................................................................
10.3SingleFrequency ............................................................................................
10.4Other ...............................................................................................................
11 Test ...........................................................................................................................
Tables
Table 1 Limiting Observable Temperature Riseof Air.Cooled.
Cylindrical-RotorGenerators
Table 2 Limiting Observable Temperature and Temperature
Rise of
Hydrogen.Cooled. Cylindrical-Rotor Generators in Degrees Celsius....
Table 3 1960 Single-Frequency TF,Weighting Factors
Table 4 Tests on Cylindrical-Rotor Synchronous Generators .............................
..................................................................
.....................................
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12
8
10
13
13
SECTION
PAGE
Figures
Figure 1 Performance Specification Form for Steam-Turbine-Driven, HydraulicTurbine-Driven,and Motor-Driven, Air-Cooled, Cylindrical-Rotor
SynchronousGenerators .........................................................................
14
Figure 2 Performance Specification Form for Steam-Turbine-Driven,
Hydrogen-Cooled, Cylindrical-Rotor Synchronous Generators............. 15
COPYRIGHT American National Standards Institute
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American National Standard
for Rotating Electrical Machinery -
Cylindrical-Rotor Synchronous Generators
1. Scope
4. Usual Service Conditions
The requirements in this standard apply to 60-hertz
cylindrical-rotor synchronous generators, except
those covered in ANSI C50.14-1977.
All requirements and definitions, except as specifically covered in this standard, shall bein accordance with ANSI C50.10-1977.
The usual service conditions uponwhich the
requirements for cylindrical-rotor synchronous
generators are based are given in ANSI C50.101977. In addition to these usual service conditions,
the following requirements shall be met.
2. Referenced American National Standards
This standardis intended for use in conjunction
with the following American National Standards.
When these referenced standards aresuperseded by
a revision approved by the American National
Standards Institute, Inc, the revision shall apply:
ANSI C50.10-1977, General Requirements for
Synchronous Machines
ANSI C50.14-1977 (R1989), Requirements for
Combustion Gas Turbine Driven Synchronous
Generators
ANSIIIEEE 115-1983, Test Procedures for Synchronous Machines
4.1 Variation from Rated Voltage. Generators shall
operate successfully at ratedkilovolt-amperes
(kVA) frequency, and power factor at any voltage
not more than 5 percent above or below rated voltage, but not necessarily in accordance with the
standards of performance established for operation
at rated voltage.
4.2 Variation from Rated Hydrogen Pressure.
Capabilities at hydrogen pressures other than rated
pressure shall be available from the manufacturer.
The capabilities at hydrogen pressures other than
rated pressure shall be determined such that the
hottest-spot temperature of the winding that is limiting at the-specified capability is essentially the
same as that at rating:
4.3 Variation from Rated Frequency. Capabilities
at frequencies other than rated frequency shall be
available from the manufacturer.
3. Classification
A cylindrical-rotor synchronous generatoris classified by one of the stator and one of the rotor types.
3.1 Stator Types.' The typeof stator is defined by
the method of armature winding cooling, either
directly or indirectly.
3.2 Rotor Types.' The type of rotor is defined by
the method of field winding cooling, either directly
or indirectly.
[Refer to ANSI C50.10-1977 for definitions.
5. Rating
5.1 Output Rating. The outputrating shall be
expressed in kilovolt-amperes available at the terminals at a specified speed, frequency, voltage, and
power factor.
The outputrating of hydrogen-cooled generators
shall be at the maximum hydrogen pressure
imposed on the generator enclosure. The output
rating, specified temperatures, and observable
temperature rises shall be based only on rated hyd-
7
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AMERICAN NATIONAL STANDARD C50.13-1989
Table 1
Limiting Observable Temperature Rise
of
&-Cooled, Cylindrical-Rotor Generators
Item
(1)
Method of
Temperature
Temperature
Rise
Determination
Machine Part
Armature
winding
(a) below 10 O00 kVA
1563
(b)
kVA and less
(c) 1564 kVA to 10 O00 kVA
( 1 ) 7000 V and less
(2) over 7000 V
O00 kVA and above
10(d)
ClassB
resistance
125 105
embedded detector*
80
90
embedded
135detector*
110
embedded detector*
embedded detector*
85
80
125
85
("C)
ClassH
140115
105
90t
ll0t
90
110
(2)
Field winding
resistance
125
(3)
Cores
and
mechanical parts
in contact with or adjacent
to insulation
detector or
thermometer
70
(4 1
Collector rings
thermometer
85
85
85
(5)
Miscellaneous parts (such as brushholders,brushes, etc) may attain such temperatures as will not
injure the machine in any respect
~~
105
70t
ClassF
~
*Embedded detectors are located within the slot of the machine and can be either resistance elements or thermocouples.
Embedded detector temperatures shall be used to demonstrate conformity with the standard for generators so equipped.
+These values are f o r insulation systems with thermosetting materials. For thermoplastic materials the equivalent temperatures shall be 6OoC for Class B; Class F and Class H do not apply.
rogen pressure. The preferred maximum hydrogen
pressures are:
( I ) For indirectly cooled generators: 30 psig
(pounds per square inch
direct-connected
with
type
gage) exciters.
(2) For directly cooled generators: 30,45, 60, or
75 psig
5.2 Capability. The capability of a synchronous
generator is the highest acceptable continuous
loading (kVA) through the full range of power factor at a specified condition.
5.3 Voltage Ratings
5.3.1 Armature. Armature voltage ratings shall
be:
240 *
480
600"
2 400*
4 160
4 goo*
6 900*
13 800
*These ratings are recognized for use on established systems,
but not preferred for new undertakings.
Generator voltages above 13 800 volts are desirable in large-capacity generators that usually are
connected directly to their own step-up
transformers,
5.3.2 Excitation System Voltage Ratings. The
preferred excitation system voltage ratings for field
8
COPYRIGHT American National Standards Institute
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windings are 62.5,125,250,375,
500, 625, and
750 direct voltage. These excitation system voltages do not apply to generators of the brushless
:
!
6. Temperature Rise
I
6.1 Air-Cooled Machines. The observable tempera-
ture rise of each of the various parts of the
machine above the temperature of the cooling air,
referred to as the cold air temperature, shall not
exceed the values given in Table 1 when the
machine is operated at output rating conditions.
The temperature rises in Table 1 are based on a
maximum cold air temperature of 40"C .
For open machines and for parts of enclosed
machines that are cooled by open ventilation passages, that is, collector rings, the cold air temperature is the average temperature of the external air
as it enters the ventilating openings of the machine.
For totally enclosed machines, the cold air
temperature is the average temperature of the air
leaving the cooler or coolers. The cold air temperature at rating, when the coolers are supplied with
I
o
.
i
AMERICANNATIONALSTANDARD C50.13-1989
NOTES:
water of the rated amount and temperature,is usu(1) The permissible armature currents attimes up to 120
ally specified as40°C.
seconds, based upon the same incrementof heat storage as
For machines that operate under prevailing
defined in7.1, will be
barometric pressure and are designed not to exceed
60
120
10
30
Time (seconds)
standard temperature rise at altitudes from 3300
226
154
130 116
Armature current (percent)
feet (1000 meters) to 13 O00 feet (4000 meters), the
(2) It is recognized that armature temperatureswill exceed
temperature rises, 2s checked by test at low altirated load values under these conditions and therefore, the
tude, shall be less than those listed in Table 1 by 1
machine construction is based upon the assumption that the
number of such operations at armature currents to the
limits
percent of the specified temperature rise for each
specified in Note (1) will occur not more than times
2
per year.
330 feet (100 meters) of altitude inexcess of 3300
feet (1000 meters).
7.2 Field Winding Short-Time Thermal RequireWhen designing to meet the temperature rises of
ments. The generator field winding shall be capable
Table 1, it is intended that the hottest-spot temperof operating at a field voltage of 125 percent of
ature should not exceed 130°C for Class B, 155OC
rated-load field voltage for at least 1 minute startfor Class F, and 18OOC for Class H insulation
ing from stabilized temperatures at rated
systems.
conditions.
For machines of 10 O00 kVA and above, the
relationship between hottest-spot temperature and
NOTES:
(I) The permissible field voltagesat times up to 120 seconds,
the temperatures as specified in Table 1 for the
based upon the sameincrement of heat storageas defined in
armature and field windings shall be demonstrable
7.2, will be
by direct measurement or recognized methods of
Time
10
30
60
120
calculation correlated to special factory tests on a (seconds)
Voltage
Field
(percent)
208
146 112125
basically similar machine.
6.2 Hydrogen-Cooled Machines. The observable
temperature rise of each of the various parts of the
machine above the average temperature of the cold
coolant, when tested in accordance with the rating,
shall not exceed the values given in Table 2. The
temperature of the cold coolant shall be the average temperature of the coolant leaving the coolers
when tested in accordance with the rating. The
cold coolant temperatureshall not exceed the
appropriate value for the rated hydrogen pressure
as listed in Table 2. Temperatures shall be determined by the methods specified in Table 2.
The hottest-spot temperature shall not exceed
130" C for Class B insulation systems.
The relationship between hottest-spot temperature and the temperatures as specified in Table 2,
for the armatureand field windings, shall be
demonstrable by direct measurement or recognized
methods of calculation correlated to special factory
tests on a basically similar machine.
(2) It is recognized that field winding temperatures under
these conditions will exceed rated-load values and, therefore,
the machine construction is based upon the assumption that the
number of such operationsat fiekd voltages to the limits specified in Note(1) will occur not more than2 times per year.
7.3 Rotor Short-Time Thermal Requirements for
Unbalanced Faults.The generator rotorshall be
capable of withstanding, without injury, unbalanced short circuits or other unbalanced conditions
on the system or at the armature terminals resulting in values of h 2 t as listed in the following table:
Type of
Cylindrical-Rotor
Synchronous
Generator
Terms
cooled
Indirectly
Directly cooled
MVA
up 800
800 MVA to
1600 MVA
to
Minimum Generator
Short-Time
Capability Expressed in
of Z?r*
30
10
lO-(O.00625)(MVA-800)
*See note in this subsection,
7. Requirements for Abnormal Conditions
7.1 Armature Winding Short-Time Thermal
Requirements. The generator armatureshalI be
capable of operating at 130 percent of rated armature current for atleast 1 minute starting from stabilized temperatures at rated conditions.
h 2 t in the preceding table is the integrated product of the squareof the generatornegative-phasesequence current (Tz),expressed in per unit stator
current at rated kilovolt-amperes and duration of
the fault inseconds (t).
The generator unbalanced fault capability
expressed in terms of I2t applies for times up to
120 seconds, based on a constant increment of heat
storage andnegligible heat dissipation.
9
~~
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.~
AMERICAN NATIONAL STANDARDC50.13-1989
Table 2
Limiting Observable Temperature and Temperature Rise of
Hydrogen-Cooled,Cylindrical-RotorGenerators in Degrees Celsius
Item
(11
Machine Part
Indirectly Cooled Windings
(rated a t 30 psig)
Method of
Type
Temperature
Class B*,$
Determination
Temperature of
detector
cold coolant
46
(2)
Temperature rise
of armature winding
embedded
detector
(3)
Temperature rise
of field winding
(a) Generators
below 100 O00 kVA
(b) Generators
100 O00 kVA
resistance
and above
resistance
Directly Cooled Windings
(rated at 30,45,60, 75 psig)
Method of
Class B**?
of Coolant
Determination
Liquid
Gas
detector
45-50*
45-50*
54 5 ,**
coolant**
55-50**§65-60*,§
795
resistance
65-60*,§
745
resistance
65-60*3§
detector
64
detector
thermometer
85
thermometer
Temperature rise
of core and
mechanical parts in
contact with or
adjacent to armature
winding insulationt
85-80s
85-805
Temperature rise
of collector rings
brushes and
brushholders
(6)
85
Other metal parts such asshielding devices in the end region, structurai members, amortisseur windings,
and the rotor surface may
be operated a t temperatures that areconsidered safe for theparticular metals
used, providing these parts do not appreciably influence the temperature
of insulating material either by
conduction or radiation
*Because of the large thermal gradient between hottest spot and
observed temperatures of large high-voltage generators and
because of mechanical considerations of thermal expansion, it is often desirable t o design for lower temperatures than shown in
Table 2 on large or high-voltage machines or machines intended for operation withhighly variable loads.
tHydrogen-cooled generators that operate under controlled pressure do not require a correction for temperature rise a t altitude
if the pressure of the cooling medium is maintained at the absolute pressure corresponding to the rated
value.
*Cold coolant temperatures may be provided within the range of46'C t o 5OoC, at themanufacturers' option, so long as compensating adjustments are madein the rise of the respective parts so that the sum of the cold coolant temperature andrespective part rise
does not exceed
(1) 100°C for liquid-cooled and llO°C for gas-cooled armature windings listed in Items (2) and (4)
(2) ll0'C for gas-cooled field windings listed in Item (3)
0 Refer to 6.2.
* * The
temperaturerise of the coolant at theoutlet of the hottest coil shall beconsidered the observable temperature rise of
conductor-cooledarmature winding.
r t T h e values shown for Item 4 are
limiting regardless of the operating power factor.
**These values are for insulation systems with thermosetting
materials.
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AMERICANNATIONAL STANDARD C50.13-1989
In the above criteria, the generator shall be capable of withstanding the thermal effect of unbalanced faults at themachine terminals, including
the decaying effects of:
(1) Field current, where protection is provided
by causing field current reduction, such as with an
exciter field breaker or equivalent
(2) Direct-current component of the stator
current
N O T E Generators subjected to faults between the preceding
values of Z;t and 200 percent of these values may suffer varying
degrees of damage; for faults in
excess of 200 percent of these
limits, serious damage may be expected.
7.4 Mechanical Requirements for Short Circuits.
The generatorshall be capable of withstanding,
without mechanical injury, any type of short circuit
at its terminals for times not exceeding short-time
thermal requirements, when operating at rated
kilovolt-amperes and power factor and 5 percent
overvoltage, provided the maximum phase current
is limited by external means to a value that does
not exceed the maximum phase currentobtained
from thethree-phase fault.
NOTE: In the case of stator windings. the criteria for no injury
is that the windings can satisfactorily withstand a normal m a h tenance high-potential test, There shall also be no visible abnormal deformation or damage to the winding coils and
connections.
7.5 Continuous Unbalance Requirements.A generator shall be capable of withstanding, without
injury, the effects of a continuous currentunbalance corresponding to a negative-phase-sequence
current of the following values, providing the rated
kVA is not exceeded and the maximum current
does not exceed 105 percent of rated current in any
phase. Negative-phase-sequence current is
expressed in percent of rated stator current.
Permissible 12
(percent)
Generator
Type of
Cylindricalrotor
indirectly cooled
directly cooled
to 960 MVA
961 to 1200 MVA
1201 to 1500MVA
10
8
6
5
These values also express the negative phase
sequence current capability at reduced generator
kilovolt-ampere capabilities, in percent of the stator current corresponding to thereduced
capability.
7.6 Requirements forSystem Disturbances. System
disturbances, such as electrical faults, network
switching, faulty synchronizing, subsynchronous
resonance, and other abnormalities, may have a
detrimental effect o n turbine-generator shafts, end
windings, and other components, Generator
requirements that apply to these abnormalities,
beyond those included in 7,l through 7.5, are not
included in this standard due to themany combinations of circumstances possible. There areseveral IEEEWorking Group publications* that should
assist the user to determine whether unique
requirements should be established for a specific
new equipment application or analyses made of an
existing equipment application.
8. Efficiency
The following losses shall be included in determining efficiency?
(1) Z2R losses of armature and field winding.
(2) Core loss.
(3) Stray load loss.
(4) Excitation system losses, if required by specifications, shall include the exciter, voltage regulator, and associated devices comprising the excitation for a particularsynchronous machine. Include
motor loss if unit motor-generator exciter set is
used; if a unit rectifier is used,include the loss of
the rectifier and rectifier transformer.
(5) Friction and windage loss.
9. Overspeed
Cylindrical-rotor generators shall be so constructed
that they will withstand, without injury, an overspeed of ,20 percent.
10. Telephone Influence Factor
10.1 Balanced. The balanced telephone influence
factor (TIF) of synchronous generators, based on
the weighting factors given in 10.3, shall not exceed
the following values:
RatinE
kVA
TIF
of Machine
Balanced
62.5to
300 to
700 to
5000 to
20000 to
100000 and
299
699
4 999
19 999
99 999
350
250
150
above
40
100
70
2For example, refer to IEEE Screening Guide for Planned
Steady-State Switching Operationsto Minimize Harmful
Effects on Steam Turbine-Generators (IEEEF80 202-2) and
IEEE Working Group Interim Report on the
Effects of Switching Network Disturbances on Turbine-Generator Shaft Systems
(IEEE 82WM081-8).
'Refer to ANSI C50.10-1977for definifion of losses.
11
COPYRIGHT American National Standards Institute
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AMERICAN NATIONAL STANDARD
C50.13-1989
10.2 Residual Component. The residualcomponent TIF of synchronous generators having
voltage ratings 2000 volts and higher, based on the
weighting factors given in 10.3, shall not exceed the
following:
kVA Rating of Machine
l o o o t o4 9 9 9
5 o00 to 19 999
20 o00 to 99 999
100 o00 and above
12. Direction of Rotation
The direction of rotation of the generator shall suit
the prime mover requirements.
Residual TIF
100
75
50
30
10.3 Single Frequency. The single-frequency telephone influence weighting factors (TIFF ) according
to the 1960 single-frequency weightingare shown
in Table 3.
Methods of measurement for TIF shall be in
accordance with ANSI/IEEE 115-1983.
10.4 Other. Special consideration may be necessary
where trouble exists or may be anticipated from
difficult exposure conditions.
NOTES:
(1) Although TIF is designed basically as a measure of the
influence of current or voltage in a power circuit on parallel
telephone circuits, the TIF of open-circuit generator voltage has
been used for many years as an approximate index of the influence of generator waveshape. 'here has been no experience to
indicate that generators designed in accordance with ANSI
C50.1-1955' have caused inductive coordination problems, However, accuwlated measurements by manufacturers indicate that generator open-circuit TIF measured in accordance
with the 1960 weighting averaged higher than with the 1935
weighting. Accordingly, in adopting the 1960 weighting in this
revision of ANSI C50.1-1955, the limiting TIF values of lowercapacity machines were increased. At the same time, the greatly
improved waveshape of modem highcapacity generators is recognized in setting a lower limit of balanced TIF for the larger
units.
(2) For information on TIF, see "Supplement to Engineering
Report 33, The Telephone M u e n c e Factor of Supply System
Voltages and Currents," Engineering Reports of the Joint Subcommittee on Development and Research, Edison Electric Institute. and Bell System, Edison Electric Institute Publication 6068. For further information on methods of measurement of
TIF, see W.C. Ball and C.K. Poarch, "Telephone Influence Factor (TIF) and Its Measurement," AIEE Transactions, Pt I, vol
79, Jan 1961, pp 659-664.
11. Tests
The tests specified in Table 4 shall be conducted
in accordance with ANSIDEEE 115-1983 and
ANSI C50.10-1977.
COPYRIGHT American National Standards Institute
Licensed by Information Handling Services
13. Nameplate Marking
A nameplate having the following minimum information shall be provided: manufacturers's name,
serial number, or other suitable identification.
The following information at rating shall be
supplied:
(1) Voltage
(2) Output kilovolt-amperes
(3) Revolutions per minute
(4) Armature amperes
(5) Frequency
(6) Temperature rise of armature
(7) Temperature rise of field
(8) Number of phases
(9) Power factor
(10) Excitation voltage
(1 1) Excitation amperes
(12) Hydrogen pressure (if hydrogen cooled)
NOTES:
(I) Direction of rotation should be shown on machine when
necessary for correct operation.
(2) For hydrogen-cooled machines, the values shall be given
for maximum hydrogen pressures.
14. Performance Specification Forms
Figure 1 shows the forms that shall be used for
specifying the performance of steam-turbine-driven,
hydraulic-turbine-driven, and motor-driven, aircooled synchronous generators.
Figure 2 shows the form that shall be used for
specifying the performance of steam-turbinedriven, hydrogen-cooled synchronous generators.
~~
~
4Later superseded by ANSIINEMA MGI-1978 and NEMA
MGI-1987.
ANSI C 5 0 - 3 3 87 W 0 7 2 4 3 5 0 bOb4647 8
AMERICANNATIONAL STANDARD C50.13-1989
Table 3
1960 Single-FrequencyTIFf Weighting Factors
~
60
1980
180
2100
300
360
420
2340
540
2460
660
2580
720
7 282080
2940
900
1000
3000
3180
1020
3300
1080
1140
3540
3660
1260
3900
1380
1440
4020
4260
1500
4380
1620
5000
1740
1800
~~
~~~
TIFf
FrequencyFrequency
TIFf
1860
O.5
30
225
400
650
1320
2260
2760
3360
4350
5000
5100
5400
5630
6050
6370
6650
6680
6970
7320
7570
2160
2220
7820
8330
8830
9080
9330
9840
10 340
10 600
10 210
9820
9670
8740
8090
6730
61
30
4400
3700
27
50
2190
840
Table 4
Tests on Cylindrical-Rotor Synchronous Generators
c
Generators Completely
Assembled for Test in Factory
Factory
Tests
TesC
Resistance of armature and field windings
Dielectric tests of armature andfield windings
Voltage balance
Phase sequence
Mechanical balance
Open-circuit saturation curve
Overspeed
Short-circuit saturationcurve 1
Harmonic analysis and measurement of TIF
Heat runs
Short-circuit tests atreduced voltage to
determine reactance and time constants
Measurement of segregated losses
Measurement of rotor impedance
Measurement of insulation resistance of
armature and field windings
Measurement of bearing insulation resistance
Generators
Not
Completely
Assembled in Factory
Field
Tests
X*
X
X
X
Xt
X
X
-0
-0
-0
-0
-P
X+*
X
-* *
*An X indicates that testshall be made on each unit.
tA field check of mechanical balance of all generatorsis recommended after installation.
o
*On brushless generatots, readingsof exciter field currentinstead of generator field currentmay be obtained.
$This test, orcopies of a certified test report covering test made on an essentially duplicate generator, may be specified.
**On all generators furnished with one
or more insulated bearings, a field measurement
of the bearing insulation resistance is
recommended.
WFor units less than 10 O 0 0 kVA and l e s than 7000 V. measwement of rotor impedance is not required.
13
COPYRIGHT American National Standards Institute
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0724350 0004k50 4 W
A N S I C50.33 87
AMERICAN NATIONAL STANDARD C50.13-1989
Figure 1
Performance Specification Form for Steam-Turbine-Driven, Hydraulic-Turbine-Driven, and
Motor-Driven, Air-Cooled, Cylindrical-Rotor Synchronous Generators
(The following data shall be given in accordance with ANSI C50.13-1989.)
Date
Output Rating
Power
Factor
kVA
No of
Poles
Spe?
kW
rlmm
No of
Phases
Freq
Hertz
Volts
Amperes
Type or
Frame
Description
-Type of excitation system
- Maximum speed of generator (and exciter if shaft-driven) is
rlminwithout mechanicalinjury.
- Amortisseur winding is (closed) (open) (not supplied)
-Generator cooling (shall) (shall not) include aclosed-circuit air system.
. Armature
Connections
- Insulation Classes: Armature Winding
- Direction of rotation viewing theendoppositethe
I
I
Temoerature Rise Guarantees
Rise C Not to Exceed
Power
kVA
Max Excitation Requirements
Gen Excitation
Exciter Input
Slip-Ring Type
Brushless
Wdg by
I
I
.
if of unidirectional design orconstruction.
Volts
Amp
I
Field Winding
drive
Volts
Amp
Excit Svstem
Nominal
Response Ceiling
Rafio
Volts
I
Exciter (1 )
(1) At “Maximum Excitation Requirements” operating level.
Rating and temperature rises are based on an ambient temperatureof 40°C at an altitude notexceeding 3300 ft
(1000 m).
Minimum Efficiencies
Power
Factor
kVA
kW
Load
Load
Load
Efficiencies are determined by including Z losses of armature and field windings at -’C, core loss and strayload loss.
Friction and windage loss (are) (are not) included; exciter and field rheostat losses (are) (are not) included.
Approx Weights in Pounds
Heaviest
Part
Total Total for Rotor
Net
Net
Crane
Shipping
Reactances (Calc per Unit)
X”dv
Svnchtrans Transient
Sub
xd
x‘di
I
1
Circuit
Ratio
Ib-ft2
I
I
I
I
I
I
I
- Approximate Operating Data for Cooling System with generator at rated load:
Totally enclosed with water coolers
Temperature of inlet water
to
coolers.
“F
Volume of cooling water.
gallons
per
minute
(gpm)
bearing oil. when required)
Enclosed. self-ventilated (no external blower)
Volume of
cfmcooling
air.
Pressure drop available for
external
ducts.
filters. etc
14
”
7.
COPYRIGHT American National Standards Institute
Licensed by Information Handling Services
I
-
(for ventilating air and
inch of water.
l
A N S I C50.13 B9 I0 7 2 4 3 5 0 0 0 0 4 b 5 3 b I
AMERICAN NATIONAL STANDARD C50.13-1989
Figure 2
Performance Specification Form for Steam-Turbine-Driven, Hydrogen-Cooled,
Cylindrical-Rotor Synchronous Generators
(The following data shall be given in'accordance with ANSI C50.13-1989.)
Output Rating
Po wer
Factor
kVA
kW
Speed
rlmin
No of
No of
Poles
Phases
Freq
Volts
Hertz
Amperes
Type or
Frame
Description
-Type of excitation system
- Amortisseur winding is (closed) (open) (not supplied)
-Insulation Classes: Armature Winding
Field Winding
-Direction
, Armature
Connections
of rotation viewing the endoppositethedrive
Temperature Rise Guarantees
C
Rise Not to Exceed
Excitation
Gen
Winding
Arm
Power
Embedded
by
Resistance
I
I
if of unidirectional design or construction.
Max Excitation
Requirements
Exciter Input
Excit
System
Slip-Ring Type
Brushless
I
Exciter (1)
(1)At "MaximumExcitation Requirements" operating level.
'
C
Rating and temperature rises shall bein accordance with Table 2 of ANSI (30.13-1989and arebased on a temperature of
of the cooling gas at theexit from the coolers, at
psig pressure and at an altitude not exceeding 3300 fi (1000m).
Efficiencies: Efficienciesof the generator are included in theover-all turbine-generator set efficiencies.
Reactances
Approx
Unit)
(Calc per
Operating Data (at rated load and hydrogen pressure):
(a) Temperature of inlet water to coolers.
(b) Volume of cooling water^.
gpm
Weights in Pounds
Heaviest
OF
15
COPYRIGHT American National Standards Institute
Licensed by Information Handling Services
I