Companion II 8.3kV, 17.2kV and 23kV 12K - 40K Backup Fuses
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1 CP No.: CP9716 Rev. 02 Page: 1 of 9 CERTIFIED TEST REPORT Companion II 8.3kV, 17.2kV and 23kV 12K - 40K Backup Fuses Rev. 02 DATE: June 3, 2010 ORIGINAL REPORT DATE: June 13, 1997 Cooper Power Systems, Inc.
2 CP No.: CP9716 Rev. 02 Page: 2 of 9 Companion II 8.3kV, 17.2kV and 23kV 12K - 40K Backup Fuses CERTIFICATION Statements made and data shown, to the best of our knowledge and belief, are correct and within the usual limits of commercial testing practice.
3 CP No.: CP9716 Rev. 02 Page: 3 of 9 Overview The Cooper Power Systems Companion II 12K through 40K fuses are designed to be applied as backup current limiting fuses. In this application, the Companion II fuse provides protection against high current faults and limits the peak current and the amount of let-through energy to the protected equipment. The CPS Companion II fuse is typically applied in series with an expulsion fuse. When applied in series with an expulsion or other type of low current interrupting device, the combination provides full range protection. Certification Tests as required by IEEE Std C Interruption Tests at Line-to-Neutral Rated Voltage Series 1 Rated Maximum Interrupting Current Series 2 Critical Current Series 3 Rated Minimum Interrupting Current 2. Temperature Rise Tests 3. Time Current Characteristic Tests 4. RIV Tests
4 CP No.: CP9716 Rev. 02 Page: 4 of 9 Requirements INTERRUPTION TESTS Back-up current-limiting fuses are required to operate on high available fault currents and limit the fault current magnitude and energy. They must interrupt these fault currents so that the other pieces of connected equipment are isolated from the electrical distribution system. Objective The objective of these tests is to verify the interrupting performance of the Companion II fuse for applications at the respective voltage rating by testing according to the requirements specified in ANSI/IEEE C , clause 6.6 and C Procedures These tests were run on production fuses which were assembled using standard methods and procedures. The testing was conducted at ambient temperature. Test Results The Companion II 12K 40K fuses successfully interrupted each respective test current. The performance parameters are detailed in Table 1: Table 1: Interruption test results Test current Test Voltage close angle Melt I²t Total I²t Total Energy Melt time Clear time Withstand Part number A kv deg X/R ka²sec ka²sec kj msec msec (min) 8.3kV 12K kV 12K kV 12K kV 12K kV 12K kV 12K kV 12K kV 12K kV 40K kV 40K kV 40K kV 40K kV 40K kV 40K kV 40K kV 40K kV 12K kV 12K
5 CP No.: CP9716 Rev. 02 Page: 5 of kV 12K kV 12K kV 12K kV 12K kV 12K kV 12K kV 40K kV 40K kV 40K kV 40K kV 40K kV 40K kV 40K kV 40K kV 12K kV 12K kV 12K kV 12K kV 12K kV 12K kV 12K kV 12K kV 25K kV 25K kV 25K kV 25K kV 25K kV 25K kV 25K kV 25K
6 CP No.: CP9716 Rev. 02 Page: 6 of 9 Requirements TEMPERATURE RISE TESTS Backup current limiting fuses are required to carry all normal system steady state currents without incurring temperature rises that would be detrimental to any of the fuse parts. Objective The objective of this test is to verify that the temperature rise does not exceed the values specified in ANSI C37.47 and ANSI C Procedures Production fuses were tested per requirements specified in ANSI/IEEE C37.41 (Clause, 10). Current was supplied by a regulated current source. Temperature levels of the various current carrying parts were recorded throughout the duration of the test. Note that the fuse itself does not have a continuous current rating there is an implied rating that the fuse must carry about 1.5 times the rating of the cutout link it is used in series with i.e. 60 A for the 40K fuse. Test Results Temperature rises were below maximum temperature rise levels allowed by standard IEEE C Table 1. Conclusion The Companion II 12K 40K fuses met the temperature rise requirements of Table 2 in ANSI/IEEE C37.40.
7 CP No.: CP9716 Rev. 02 Page: 7 of 9 Requirements TIME CURRENT CHARACTERISTICS TESTS Time current characteristic curves are primarily for application selections and system coordination studies. These curves, minimum melt and maximum clear, detail the performance data of a particular fuse design. Objective Establish time current characteristic curves for the 12K 40K Companion II fuses per ANSI/IEEE C (R-1992) requirements. Procedure Testing was performed on production fuses which were assembled using established methods and procedures. Minimum melt and maximum clear time current characteristic curves were developed using ANSI/IEEE C , Clause, 12 requirements as a guideline. The curves reflect the typical industry tolerances ± 10% of the average melting current. An allowance for arcing time is also added to the total clearing curve to determine the fuse s total clearing characteristics. Testing was performed at ambient temperatures. Results and Conclusions The minimum melt and maximum clear TCC curves for the 12 40K Companion II backup current limiting fuses were developed using the procedure described above and are detailed in R
8 CP No.: CP9716 Rev. 02 Page: 8 of 9 Requirements RIV Testing RIV performance data for the Companion II fuse family is necessary in order to ensure proper performance of the fuse for the manner in which it is mounted in the field. Objective Determine RIV performance levels of the highest voltage and K-rated Companion II fuses; 17.2kV 40K, 23kV 12K and 23kV 25K. The highest rated fuses were chosen to represent the worst case condition; therefore this would represent successful performance of the entire Companion II fuse family. Procedure Testing was performed as detailed in ANSI C , Clause 8. Testing was conducted by mounting the fuse on top of a 27kV Type L cutout and was performed at 1 MHz. The fuses were secured to the cutout connector in the same manner as is typical field practice. An Electro-Metric meter, model EM-7535 S/N 144, was used to record the data. Results and Conclusions Applied rms Voltage (kv) Corrected Reading (µvolts) Fuse Part number Meter Reading (µvolts) FAH17KV40K 15.8 <10 <10 FAH23KV12K 15.8 <10 <10 FAH23KV25K 15.8 <10 <10 Barometer = mmhg Dry Bulb = 23.5 C Wet Bulb = 16.5 C All fuses were less than the permissible maximum value, 250 µvolts, specified by standards. A 10 µvolt reading is considered RIV inception.
9 CP No.: CP9716 Rev. 02 Page: 9 of 9 Revision no. Date of addition/change REVISION HISTORY Addition/Change made to report 02 6/3/10 Updated report with new interruption data and RIV results Quality from Cooper Industries P.O. Box 1640, Waukesha, WI 53187
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