1、The Institute of Electrical and Electronics Engineers, Inc.3 Park Avenue, New York, NY 10016-5997, USACopyright 2004 by the Institute of Electrical and Electronics Engineers, Inc.All rights reserved. Printed in the United States of America.IEEE is a registered trademark in the U.S. Patent their exis
2、tence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute does not develop standards and will in no cir
3、cumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for interpretations shall be addressed to the secr
4、etariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken to reaffirm, revise, or withdraw this standard n
5、o later than five years from the date of approval. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. Published by National Electrical Manufacturers Association 1300 N. 17th Street, Rosslyn, Virg
6、inia 22209 Copyright O 1999 National Electrical Manufacturers Association All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or othennrise, without prior written permission of the publisher. Printed in the United States of America II Con
7、tents Foreword . v 1 Scope 1 2 Referenced and related standards 1 2.1 Referenced American National Standards 1 2.2 Other referenced standards . 1 2.3 Related standards 2 3 Definitions . 2 4 Service conditions . 6 4.1 Usual service conditions . 6 4.2 Unusual service conditions . 6 5.1 General 6 5 Rat
8、ings 6 5.2 Relaying service CCVTs 14 5.3 Metering service CCVTs . 14 6 Testing . 16 6.1 General . 16 6.2 Design test procedures . 17 6.3 Production test procedures . 30 7 Manufacturing requirements 32 7.1 Mounting ., 32 . 7.2 Nameplate markings 32 7.3 Certificate of test . 33 7.4 Symbols 33 7.5 Pola
9、rity and terminal marking . 33 7.6 Safety devices 34 7.7 High-voltage terminal . 35 Figures . 1 Circuit diagram of burden to be used for transient response test 12 2 Limits for accuracy class 1.2R for coupling capacitor voltage transformers 3 for relaying service 15 Limits for accuracy classes 0.3,
10、0.6, and 1.2 for coupling capacitor voltage transformers for metering service . 15 4 .Transient response test circuits 29 Tables 9 10 Upper ambient temperature limit 6 Dielectric strength correction factors 6 Radio-influence voltage 9 Burdens for accuracy rating 11 Burdens for transient response rat
11、ings . 12 Accuracy class limits for relaying service . 13 Limits of ratio correction factor and phase angle with voltage variations for Voltage ratings, dielectric strengths, leakage distances, and marked ratios 8 relaying service 13 Duration of induced-potential. test . 31 Coupling capacitor voltag
12、e transformer symbols . 34 iii STDONEMA C93-L-ENGL L999 W 6470247 0523175 265 m ANSVNEMA C93.1-1999 Annexes A Coupling capacitor and CCVT circuit diagrams . . 37 B Calculation of CCVT ratio and phase angle from known zero and C rated burden data . 39 Drain coil loading in power line carrier coupling
13、 circuits . 41 Figures Al Coupling capacitor with carrier accessories . _. . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . .37 A2 Typical coupling capacitor voltage transformer with carrier coupling accessories . _. 38 Cl Typical line tuner coupling capacitor connection 42 IV S
14、TD-NEMA C73.L-ENGL 1777 9 611702117 0523176 m ANSVNEMA C93.1-1999 Foreword (This Foreword is not part of American National Standard ANSINEMA C93.1-1999) This document was developed by Accredited Standards Committee C93, Power-Line Carrier Equipment and Coupling Capacitor Voltage Transformers. During
15、 the development of the standard, the Committee considered input from a balanced group representing consumer, producer, and general-interest viewpoints, which it harmonized and integrated into the standard in its present, approved form. Accredited Standards Committee C93 was established to coordinat
16、e, revise, and update the existing documents into an effective group of American National Standards, including this standard for coupling capacitors and CCVTs. A separate standard will be developed to cover each type of equipment described in the Committee scope. This standard is related to American
17、 National Standard Requirements for Power-Line Carrier Line Traps, ANSVNEMA C93.3, and American National Standard Requirements for Power-Line Carrier Line Tuning Equipment, ANSVNEMA C93.4. It is recognized that there are no requirements for ferroresonance suppression or primary short-circuit transie
18、nt response; however, the recommended test procedures are given in 6.2.16 and 6.2.17 of the standard. If meaningful requirements are determined by the industry, they will be adopted in future revisions of this standard. For metering service coupling capacitor voltage transformers, this standard alig
19、ns with American National Standard Requirements for Instrument Transformers, ANSI C57.13, where applicable. Suggestions for improvement of this standard will be welcome. They should be sent to the Secretary, ASC C93, c/o National Electrical Manufacturers Association, 1300 North 17th Street, Suite 18
20、47, Rosslyn, VA 22209. This standard was processed and approved for submittal to ANSI by Accredited Standards Committee on Power-Line Carrier Equipment and Coupling Capacitor Voltage Transformers, C93. Committee approval of the standard does not necessarily imply that all members voted for its appro
21、val. At the time it approved this standard, the C93 committee had the following members: Walter Seamon, Chairman Khaled Masri, Secretary Organization Represented Name of Representative Edison Electric Institute James Benton Gary Miller (Alternate) Robert Morton Institute of Electrical the maximum pe
22、rmissible temperature for 80C-rise transformers and reactors shall be 350C. Table 5 - Burdens for accuracy rating * These burden designations have no significance at frequencies other than 60 Hz. 11 STD-NEMA C53.L-ENGL L999 m b4702117 0523388 533 111 ANSllNEMA C93.1-1999 Table 6 - Burdens for transi
23、ent response ratings Designation X, (ohms) R, (ohms) R, (ohms) Power factor Volt-amperes At 100% burden: ZT 51.3 29.6 66 0.85 400 ZZT 102.5 59.2 131.9 0.85 200 At 25% burden: z“/4 205 118.4 263.8 0.85 1 O0 m14 410.1 236.7 527.6 0.85 50 1 RP t -Figure 1 - Circuit diagram of burden to be used for tran
24、sient response test 5.1 .I 3 Ferroresonance suppression Meaningful suppression requirements have not been determined at this time. The test method for determining ferroresonance suppression of a CCVT is given in 6.2.16. 5.1.14 Primary short-circuit transient response Meaningful primary short-circuit
25、 transient response characteristics have not been determined at this time. The test methods for determining transient response of a CCVT are given in 6.2.17. 5.1.15 Effect of carrier accessories and auxiliary devices on accuracy Any change in circuit configuration, such as closing the carrier ground
26、ing switch or adding circuit components, may cause the accuracy class limits to be exceeded. 5.1.16 Electromagnetic unit carrier-frequency insertion loss The carrier-frequency insertion loss caused by the addition of the electromagnetic unit, with the potential grounding switch either open or closed
27、, shall not exceed 0.5 dB over the carrier-frequency range. 12 STD-NEMA C93-L-ENGL L999 m 6470247 0523389 87T m ANSIlNEMA C93.1-1999 5.1 .I7 Protective device ratings 5.1.17.1 Electromagnetic unit gaps, MOVs, and gas discharge devices Gaps and other protective devices operating at the intermediate-v
28、oltage level shall not operate at less than twice the intermediate voltage that occurs with the performance reference voltage applied to the high voltage terminal. MOV protective devices shall meet the requirements of ANSIlIEEE C62.1 l. Gas discharge protective devices shall meet the requirements of
29、 ANSIIIEEE C62.31. 5.1.17.2 Carrier air gap, MOV, and gas discharge tube protective device The carrier protective device breakdown voltage shall not be less than 2.5 kV rms at power frequency not greater than 85% of drain coil BIL for the 1.2 x 50-microsecond impulse voltage. Metal oxide protective
30、devices shall meet the requirements of ANSIAEEE C62.1 l. Gas discharge protective devices shall meet the requirements of ANSlllEEE C62.31. 5.1 .I8 Partial discharge When the capacitor unit is tested in accordance with 6.2.6.2, the value recorded in 6.2.6.2, procedure “c“ shall not exceed the value r
31、ecorded in 6.2.6.2 procedure la by more than any recorded variation in the background picocoulomb level. 5.1 .I9 Mechanical strength 5.1.19.1 Cantilever strength A coupling capacitor or CCVT shall be capable of withstanding the nonsimultaneous mechanical cantilever forces equivalent to those produce
32、d by winds of 100 mi/h (45mls) and the horizontal seismic force resulting from a zero period acceleration of 0.2 g. (see 6.2.4.1) 5.1 .I 9.2 Tensile Strength A coupling capacitor or CCVT intended for suspension mounting shall be capable of withstanding a tension force of 2.5 times its own weight (se
33、e 6.2.4.2). Table 7 - Accuracy class limits for relaying service Limits of Ratio Correction factor Accuracy class + 63 minutes 1.012 0.988 1.2R Limits of phase angle Maximum Minimum (+?S milliradians) Table 8 - Limits of ratio correction factor and phase angle with voltage variations for relaying se
34、rvice Applied voltage 90% performance reference Phase angle limits Ratio correction factor limits Accuracy class limits Accuracy class limits voltage to maximum rated voltage voltage 25% performance reference 2 5“ e 87 mrad) 0.95 to 1 .O5 5% performance reference 2 3“ (+ 52 rnrad) 0.97 to 1.03 13 ST
35、D-NEMA C73-L-ENGL 1779 W 6470247 0523190 591 m ANSVNEMA C93.1-1999 5.2 Relaying service CCvTs The CCVT shall be within the limits of the ratio correction factor and phase angle, from zero burden to accuracy burden rating, as long as an individual winding burden rating is not exceeded and the sum of
36、burdens does not exceed the burden rating of the device. 5.2.1 Accuracy class Accuracy class and corresponding limits of ratio correction factor and phase angle shall be as shown in Table 7 and Figure 2. 5.2.2 Allowable variation in ratio correction factor and phase angle with operating conditions 5
37、.2.2.1 Voltage variations The limits of ratio correction factor and phase angle, for variations in applied voltage with constant linear burden, shall be as shown in Table 8. 5.2.2.2 Temperature range A CCVT shall remain within its relaying accuracy class limits over the ambient temperature range spe
38、cified in 4.1. 5.2.2.3 Frequency variations Over the range of 58 Hz through 62 Hz, the ratio correction factor shall be within the limits of 0.95 to 1 .O5 times the 60 Hz values and the phase angle shall be within the limits Of 25“ (287 mrad) from the 60 Hz values. 5.3 Metering service CCvTs The CCV
39、T shall be within the limits of ratio correction factor and phase angle, from zero burden to accuracy burden rating, as long as an individual winding burden rating is not exceeded and the sum of burdens does-not exceed the burden rating of the device. 14 1.014 1.012 I. O10 1.008 a 1.006 0 1.004 e S
40、2 1.002 o 8 1.000 a 8 0.998 0 0.996 e 0.994 0.992 0.990 I- V S O 980 0.906 1.2R ACCURACY CLASS t63 1-18) LAGGING LEADING (PHASE ANGLE IN MILLIRADIANS) PHASE ANGLE IN MINUTES (+le) Figure 2 - Limits for accuracy class I .2R for coupling capacitor voltage transformers for relaying service Figure 3 - L
41、imits for accuracy classes 0.3,0.6, and 1.2 for coupling capacitor voltage transformers for metering service 15 STD-NEflA C93.L-ENGL 1999 m b470247 0523392 3b4 ANSVNEMA C93.1-1999 5.3.1 Accuracy classes Accuracy classes and corresponding limits of ratio correction factor and phase angle shall be as
42、shown in Figure 3. A metering service CCVT shall be assigned an accuracy class rating for each of the burdens for which it is designed. 5.3.2 Allowable variation in ratio correction factor and phase angle with operating conditions 5.3.2.1 Voltage range A CCVT shall remain within its metering accurac
43、y class limits when operating continuously between 90% of performance reference voltage and maximum rated voltage. 5.3.2.2 Temperature range A CCVT shall remain within its metering accuracy class limits over the ambient temperature range specified in 4.1. 5.3.2.3 interrelation of voltage and tempera
44、ture The provisions of 5.3.2.1 and 5.3.2.2 shall be considered simultaneous effects. 6 Testing 6.1 General 6.1 .l Test conditions The following test conditions are applicable: -, a) The ambient temperature range for testing shall be from +IOOC through +40C, with +20C as the reference temperature. b)
45、 The test units shall be new and in clean, dry condition. c) The test units shall be mounted vertically. d) A coupling capacitor or CCVT may be tested at any altitude higher than 3300 feet (1000 meters) if the appropriate altitude correction from Table 2 and 6.2.14.6 are applied. e) The sequence of
46、testing shall be optional, except where otherwise noted. 6.1.2 Design tests The following design tests shall be performed by the manufacturer on each coupling capacitor and CCVT design to verify that its characteristics and performance meet the requirements of this standard: a) Dielectric (see 6.2.1
47、). b) Radio-influence voltage (see 6.2.2). c) Carrier-frequency capacitance and dissipation factor (see 6.2.3). d) Mechanical (see 6.2.4). e) Leakage distance (see 6.2.5). 9 Partial discharge (see 6.2.6). 16 g) Low-voltage terminal insulation level (see 6.2.7). h) Low-voltage terminal stray capacita
48、nce and stray conductance (see 6.2.8). i) Protective device breakdown (see 6.2.9). j) Camer drain coil power-frequency voltage drop, and insulation level (see 6.2.1 O). k) Electromagnetic Unit carrier-frequency insertion loss (see 6.2.1 1) (CCVTs only). I) Accuracy (see 6.2.12) (CCVTs only). m) Shor
49、t-time overvoltage (see 6.2.13) (CCVTs only). n) Thermal burden (see 6.2.14) (CCVTs only). o) Short circuit (see 6.2.15) (CCVTs only). P) Ferroresonance (see 6.2.16) (CCVTs only). q) Transient response (see 6.2.1 7) (CCVTs only). 6.1.3 Production tests The following production tests shall be performed by the manufacturer on each coupling capacitor and CCVT: a) Capacitance and dissipation factor (see 6.3.1). b) Dielectric (see 6.3.2). c) Camer protective device (see 6.3.3). d) Electromagnetic unit protective device (see 6.3.4) (CCVTs only). e) Accuracy (see 6.3.5) (CCVTs only). 9 Po
