VA 26 05 71-2010 ELECTRICAL SYSTEM PROTECTIVE DEVICE STUDY.pdf
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1、09-10 26 05 71 - 1 SECTION 26 05 71 ELECTRICAL SYSTEM PROTECTIVE DEVICE STUDY SPEC WRITER NOTE: Delete between / - / if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. This section shall be included in all projects requiri
2、ng major primary replacement or modifications, large hospital construction, and those projects for which it is specifically requested by the Government. The inclusion of this section does not relieve the A/E of preparing short-circuit calculations and coordinating over-current devices. Its purpose i
3、s to ensure that the successful bidders equipment shall perform as intended. PART 1 - GENERAL 1.1 DESCRIPTION A. This section specifies the requirements of the Electrical System Protective Device Study (herein, “the study”). B. A short-circuit and selective coordination study shall be prepared for t
4、he electrical overcurrent devices to be installed under this project. SPEC WRITER NOTE: Insert the limits of the study in the blank space if a complete study is not required. C. The study shall present an organized time-current analysis of each protective device in series from the / individual devic
5、e / / _ / back to the utility/ and the on-site generator sources/. The study shall reflect the operation of each device during normal and abnormal current conditions. 1.2 RELATED WORK A. Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS: General electrical requirements that are common to m
6、ore than one section of Division 26. B. Section 26 13 00, MEDIUM-VOLTAGE SWITCHGEAR: Medium-voltage distribution switchgear. C. Section 26 18 41, MEDIUM-VOLTAGE SWITCHES: Medium-voltage switches. D. Section 26 23 00, LOW-VOLTAGE SWITCHGEAR: Low voltage switchgear. E. Section 26 24 11, DISTRIBUTION S
7、WITCHBOARDS: Low-voltage distribution switchboards. F. Section 26 24 16, PANEL BOARDS: Low-voltage panelboards. G. Section 26 24 19, MOTOR CONTROL CENTERS: Low-voltage motor control centers. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-10 26 05
8、 71 - 2 H. Section 26 24 21, MOTOR CONTROL PANELBOARDS: Low-voltage motor control panelboards. I. Section 26 32 13, ENGINE-GENERATORS: Engine-generators. J. Section 26 36 23, AUTOMATIC TRANSFER SWITCHES: Automatic transfer switches. 1.3 QUALITY ASSURANCE A. Refer to Paragraph, QUALIFICATIONS, in Sec
9、tion 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS. B. The protective device study shall be prepared by the equipment manufacturers qualified engineers or an approved consultant. The contractor is responsible for providing all pertinent information required by the preparers to complete the stu
10、dy. 1.4 SUBMITTALS A. In accordance with Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS, submit the following: B. Product data on the software program to be used for the study. Software shall be in mainstream use in the industry, shall provide device settings and ratings, and shall show
11、 selective coordination by time-current drawings. C. Complete short-circuit and coordination study as described in paragraph 1.6. D. Protective equipment shop drawings shall be submitted simultaneously with or after the protective device study. Protective equipment shop drawings will not be accepted
12、 prior to protective device study. E. Certification: Two weeks prior to final inspection, submit four copies of the following to the /Resident Engineer/ /COTR/: Certification by the contractor that the protective devices have been adjusted and set in accordance with the approved protective device st
13、udy. 1.5 APPLICABLE PUBLICATIONS A. Publications listed below (including amendments, addenda, revisions, supplements, and errata) form a part of this specification to the extent referenced. Publications are referenced in the text by designation only. B. Institute of Electrical and Electronics Engine
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