IEEE-C37.20.6-1997-R2003.pdf
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1、IEEE Std C37.20.6-1997 IEEE Standard for 4.76 kV to 38 kV Rated Grounding and Testing Devices Used in Enclosures Sponsor Switchgear Committee of the IEEE Power Engineering Society Approved 20 March 1997 IEEE Standards Board Approved 20 August 1997 American National Standards Institute Abstract: Draw
2、out type grounding and testing (G (508) 750-8400. Permission to photocopy portions of any individual standard for educational classroom use can also be obtained through the Copyright Clearance Center. Note: Attention is called to the possibility that implementation of this standard may require use o
3、f subject matter covered by patent rights. By publication of this standard, no position is taken with respect to the existence or validity of any patent rights in connection therewith. The IEEE shall not be responsible for identifying patents for which a license may be required by an IEEE standard o
4、r for conducting inquiries into the legal validity or scope of those patents that are brought to its attention. Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/28/
5、2007 23:27:28 MDTNo reproduction or networking permitted without license from IHS -,-,- iii Introduction (This introduction is not a part of IEEE Std C37.20.6-1997, IEEE Standard for 4.76 kV to 38 kV Rated Grounding and Testing Devices Used in Enclosures.) Although grounding and testing devices (G i
6、t shall be in accordance with 4.4.5 and 4.4.6 of IEEE Std C37.20.2-1993. Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/28/2007 23:27:28 MDTNo reproduction or net
7、working permitted without license from IHS -,-,- 4Copyright 1997 IEEE All Rights Reserved IEEE Std C37.20.6-1997IEEE STANDARD FOR 4.76 kV to 38 kV RATED GROUNDING 5.5 Rated momentary current The rated momentary current of a G the peak current value shall be 2.6 times its rated short- time current, a
8、t the major peak of the maximum cycle, and the rms total current shall be 1.55 times its rated short-time current, as determined from the envelope of the current wave. This rating shall be no less than the required close-and- latch current capability of the circuit breaker it is intended to replace.
9、 5.6 Rated control voltage The rated control voltage of an electrically operated G the peak current value shall be 2.6 times its rated short-time current, at the major peak of the maximum cycle; and the rms total current shall be 1.55 times its rated short-time current, as determined from the envelo
10、pe of the current wave. This rating shall be no less than the required close-and-latch current capability of the circuit breaker it is intended to replace. 6. Functional components The functional components required for manual and electrical ground and test devices are listed in Table 1. Additional
11、accessory devices may be available and the manufacturer should be consulted for specific information. 6.1 Power-operated ground-making switch position indicator Each G&T device equipped with a power-operated ground-making switch shall have an indicator visible from the front of the device when insta
12、lled in the enclosure to show the closed and open position of the power-operated ground- making switch. The following colors shall be used: a)Red background with the word CLOSED-GROUNDED in contrasting color to indicate closed contacts. b)Green background with the word OPEN-UNGROUNDED in contrasting
13、 color to indicate open contacts. 6.2 Terminal selector switch and position indicator The manually operated terminal selector switch provides the ability to connect the power-operated ground-making switch to either terminal set (or neutral position if provided). The terminal selector switch position
14、 shall be able to be changed only when the G&T device is fully removed from the enclosure, and means for visual verification of the terminal switch position shall be provided. A position indicator, visible from the front when the device is installed in the enclosure, shall show which terminal set ha
15、s been selected (including the neutral position if provided). Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/28/2007 23:27:28 MDTNo reproduction or networking per
16、mitted without license from IHS -,-,- Copyright 1997 IEEE All Rights Reserved5 AND TESTING DEVICES USED IN ENCLOSURESIEEE Std C37.20.6-1997 Table 1 Functional components 6.3 Stored energy indicator For mechanisms intended to be charged and to remain charged until released, a stored energy indicator
17、shall be provided. The following colors shall be used: a)Yellow background with black lettering to indicate that the closing mechanism is CHARGED. b)White background with black lettering to indicate that the closing mechanism is DISCHARGED. 6.4 Interlocking Interlocking for G&T devices can be very d
18、etailed depending upon the complexity of the device, especially when it is equipped with multiple functional components. The requirements given in 6.4.1 through 6.4.6 are considered the minimum interlocking requirements. 6.4.1 Insertion and withdrawal All G&T devices shall be able to be inserted and
19、 withdrawn from the circuit breaker compartment using the same, or compatible, mechanism design as that of the circuit breakers they temporarily replace, including the drawout position indication. Functional componentDevice type Simple manual Simple electrical Complex electrical One terminal set* *P
20、rimary disconnecting devices as required for compartment compatibility. XX Two terminal sets*X Optional. X Ground cable and connectors (see 8.3)X Ground connection systemXXX Test portsXX Test probesXX Power-operated ground-making switchXX Position indicator (see 6.1)XX Manual opening releaseXX Remot
21、e electrical control (see 8.4)XX Electrical opening release (see 8.4)XX Stored energy indicator (see 6.3)X Required on stored energy closing mechanisms when the mechanism can remain in the charged position. X Manually operated terminal selector switch (see 6.2) X Position indicator (see 6.2) X Inter
22、locking (see 6.4)XXX Nameplate(s) (see 6.5)XXX Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/28/2007 23:27:28 MDTNo reproduction or networking permitted without
23、license from IHS -,-,- 6Copyright 1997 IEEE All Rights Reserved IEEE Std C37.20.6-1997IEEE STANDARD FOR 4.76 kV to 38 kV RATED GROUNDING 6.4.2 Coordination All G&T devices shall be equipped with a mechanical interlock, in coordination with existing provisions in the corresponding circuit breaker com
24、partment, to block the G&T device from being inserted into a circuit breaker compartment whose ratings exceed those of the G&T device. 6.4.3 Ground-making switch closed Every electrical G&T device shall have mechanical interlocking to prevent it from being inserted or withdrawn when the power-operat
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