CA132034EN Capacitor Expulsion Fuse - Cooper Industries

1 GeneralEaton offers a wide variety of fuse kV and amp ratings for use on both horizontal and vertical Capacitor block bank configurations. Eaton's Cooper Power series bus-mounted Expulsion -type Capacitor fuse provides highly reliable, economical protection for Capacitor banks where medium-energy-interrupting ability is required. See Table 1 for electrical tube design featuresThe fuse tube is constructed of bone-grade fibre overwrapped with epoxy-bonded filament-wound fiberglass or grade XX phenolic. The upper contact, depending on the rating, is either eluminum or tin-plated bronze. The fuseholder accepts ANSI standard removable or non-removable buttonhead fuse function of the fuse tube is to confine the arc and produce arc-quenching gases which are expelled from the end of the stress across the fuse tube is eliminated by the gap between the end of the fuse tube and the Capacitor terminal. There is no possibility of tracking and eventual flashover, even after exposure to weather and contaminants.

2 When the spring ejects the leader, positive indication of a blown fuse can also be easily detected from a Expulsion fuseFusing EquipmentCatalog Data CA132034 ENEffective September 2015 Supersedes 240-37 January 1990 Cooper POWERSERIESE jector spring design featuresThe ejector spring is constructed of non-current-carrying stainless steel. The spring serves to move the leader end of the fuse out of the 's ejector springs are engineered to control lateral motion of the fuse leader during ejection. If lateral motion is not controlled the leader can strike adjacent Capacitor units resulting in unnecessary fuse operation and possible Capacitor geometry of the ejector springs are optimized to ensure that no dragging of the leader across the mouth of the fuse tube or leader cutting will occur. Either of these two effects can impede the proper operation of the fuse. ApplicationIn the event of a Capacitor fault, excess current will flow through the fuse of the faulted unit.

3 This current causes the fuse element to melt and vaporize. An arc will form across the vaporized section within the fuse tube. The function of the fuse tube and ejector (or flipper) spring is to extinguish the arc and eliminate the possibility of its re-establishment. See Tables 2-4 for fusing 1. Electrical RatingsFuse Max Voltage Rating (kV) Capacitor Voltage Rating (kV)Catalog NumberCurrent Rating (amps)Interrupting Rating (joules)Power FrequencyInterrupting Rating(amps) Capacitor Mounting Configuration* - 5B1** - - - **FN14B1** - **FN14B1**501500018002500* See Figure 1.** FN5B1 is the only unit using tin-plated bronze: all others use aluminum.** Both FN11B1 and FB14B1 Expulsion fuses are dual rated for 15 and 23 Data CA132034 ENEffective September 2015 Capacitor Expulsion fuse 2. Group Fusing Recommendations For Safe Fusing of All-Film capacitors With EEI-NEMA Tin Expulsion Fuse Links in Grounded-Wye Capacitor RacksSystem Voltage:Wye, Line to Neutral/Line to LineThree-Phase KvarRated Line Current in AmperesCapactor Unit Size50 to 100 Kvar150 to 400 KvarRecommended Link SizeRecommended Link Size2400 T* K* K2770 T* K* K50 K4160 T* T* K40 K50 K4800 T* T* K30 K40 K7200 T* T* T20 T25 K40 K50 K7620 T* T* T25 T25 K40 K50 K(continued)3 Catalog Data CA132034 ENEffective September 2015 Capacitor Expulsion fuse 2.

4 Group Fusing Recommendations For Safe Fusing of All-Film capacitors With EEI-NEMA Tin Expulsion Fuse Links in Grounded-Wye Capacitor Racks (continued)System Voltage:Wye, Line to Neutral/Line to LineThree-Phase KvarRated Line Current in AmperesCapactor Unit Size50 to 100 Kvar150 to 400 KvarRecommended Link SizeRecommended Link T* T* T20 T25 K40 K50 K8320 T* T* T20 T25 K40 K40 K50 K9540 T* T* T15 T20 K30 K9960 T* T* T15 T20 K30 K(continued)4 Catalog Data CA132034 ENEffective September 2015 Capacitor Expulsion fuse 2. Group Fusing Recommendations For Safe Fusing of All-Film capacitors With EEI-NEMA Tin Expulsion Fuse Links in Grounded-Wye Capacitor Racks (continued)System Voltage:Wye, Line to Neutral/Line to LineThree-Phase KvarRated Line Current in AmperesCapactor Unit Size50 to 100 Kvar150 to 400 KvarRecommended Link SizeRecommended Link Size12470 T* T12 T15 K25 K30 K13200 T* T10 T15 T20 K30 K30 K13800 T* T10 T15 T20 K30 K30 K14400 T* T10 T15 T20 K25 K30 K(continued)5 Catalog Data CA132034 ENEffective September 2015 Capacitor Expulsion fuse 2.

5 Group Fusing Recommendations For Safe Fusing of All-Film capacitors With EEI-NEMA Tin Expulsion Fuse Links in Grounded-Wye Capacitor Racks (continued)System Voltage:Wye, Line to Neutral/Line to LineThree-Phase KvarRated Line Current in AmperesCapactor Unit Size50 to 100 Kvar150 to 400 KvarRecommended Link SizeRecommended Link Size19920 ET* ET8 ET10 ET15 ET20 ET20 ET30 EK21600 ET8 ET10 ET15 ET20 ET20 EK25 EKTable 3. Group Fusing Recommendations For Safe Fusing of All-Film capacitors with EEI-NEMA Tin Expulsion Fuse Links in Ungrounded Wye and Delta Connected Capacitor RacksSystem Voltage:Wye, Line to Neutral/Line to LineThree-Phase KvarRated Line Current in AmperesCapactor Unit Size50 to 100 Kvar150 to 400 KvarRecommended Link SizeRecommended Link Size2400 T* K* K2770 T* K* K50 K4160 T* T* K30 K40 KNA = Cannot be fused properly using tin Expulsion fuse links.* = Rack Kvar size cannot be built using these Capacitor sizes.

6 (continued)6 Catalog Data CA132034 ENEffective September 2015 Capacitor Expulsion fuse 3. Group Fusing Recommendations For Safe Fusing of All-Film capacitors With EEI-NEMA Tin Expulsion Fuse Links in Grounded-Wye Capacitor Racks (continued)System Voltage:Wye, Line to Neutral/Line to LineThree-Phase KvarRated Line Current in AmperesCapactor Unit Size50 to 100 Kvar150 to 400 KvarRecommended Link SizeRecommended Link Size4800 T* T* K30 K40 K7200 T* T* T20 T25 K40 K50 K7620 T* T* T20 T25 K40 K50 K50 K7960 T* T* T20 T25 K40 K50 K50 K8320 T* T* T20 K30 K40 K50 K(continued)7 Catalog Data CA132034 ENEffective September 2015 Capacitor Expulsion fuse (continued)Table 3. Group Fusing Recommendations For Safe Fusing of All-Film capacitors With EEI-NEMA Tin Expulsion Fuse Links in Grounded-Wye Capacitor Racks (continued)System Voltage:Wye, Line to Neutral/Line to LineThree-Phase KvarRated Line Current in AmperesCapactor Unit Size50 to 100 Kvar150 to 400 KvarRecommended Link SizeRecommended Link Size9540 T* T* T15 T20 K30 K9960 T* T* T15 T20 K25 K12470 T* T10 T15 T20 K30 K30 K13200 T* T10 T15 T20 K25 K30 K8 Catalog Data CA132034 ENEffective September 2015 Capacitor Expulsion fuse 3.

7 Group Fusing Recommendations For Safe Fusing of All-Film capacitors With EEI-NEMA Tin Expulsion Fuse Links in Grounded-Wye Capacitor Racks (continued)System Voltage:Wye, Line to Neutral/Line to LineThree-Phase KvarRated Line Current in AmperesCapactor Unit Size50 to 100 Kvar150 to 400 KvarRecommended Link SizeRecommended Link Size13800 T* T10 T12 T20 K25 K30 K14400 +6 T* T10 T12 T20 K25 K30 K19920 ET* ET8 ET10 ET15 ET20 ET20 EK25 EK21600 ET6 ET8 ET12 ET20 ET20 EK25 EK9 Catalog Data CA132034 ENEffective September 2015 Capacitor Expulsion fuse 1. Expulsion fuse mounting configurations, dimensions, and catalog numbers for horizontal and vertical Capacitor and ordering informationFigure 1 depicts Expulsion fuse mounting configurations for horizontal and vertical Capacitor Data CA132034 ENEffective September 2015 Capacitor Expulsion fuse :NFuse link ordered separately to suit 4.

8 Individual Fusing Recommendations Bank ApplicationsUnitVoltage RatingFuse Voltage Rating (kV)50 Kvar*100 Kvar150 Kvar200 Kvar300 Kvar400 T40 K65 K80 T40 K50 K65 T25 T40 T50 T20 T30 T40 T15 T25 T30 T50 T65 T15 T20 T25 T40 T50 T15 T20 T25 T40 T50 T15 T20 T25 T40 T50 T15 T20 T25 T40 T50 T15 T20 T25 T30 T40 T15 T20 T25 T30 T15 T20 T25 T30 T15 T20 T25 T30 T15 T20 T25 T30 T12 T15 T20 T25 T10 T15 T20 T25 TTable 5. Dimensions and Catalog Numbers for Horizontal and Vertical Capacitor BanksFuse Max. Voltage Rating (kV)Mounting Configuration Horizontal: HVertical: VDimensions (in.)Catalog NumberABolt Thread X 3/4" X 3/4" X 3/4"FN13B315V10-5/85/16-18 X 3/4"FN11B115H10-5/85/16-18 X 3/4"FN14B123V10-5/85/16-18 X 3/4"FN11B123H10-5/85/16-18 X 3/4"FN14B1* For 50-Kvar capacitors , it is difficult to choose reasonably sized fuses which will withstand the I2t outrush. This occurs due to the fact that I2t withstand goes down exponentially with fuse link rating rather than linearly.

9 Consequently, the 50-Kvar Capacitor fusing recommendations only cover those units with voltages up to 9960 Data CA132034 ENEffective September 2015 Capacitor Expulsion fuse is a registered other trademarks are property of their respective Expulsion fuseCatalog Data CA132034 ENEffective September 2015 Eaton1000 Eaton BoulevardCleveland, OH 44122 United s Cooper Power Systems Division2300 Badger DriveWaukesha, WI 53188 United 2015 EatonAll Rights ReservedPrinted in USAP ublication No. CA132034 ENFor Eaton's Cooper Power series Capacitor Expulsion fuse product information call 1-877-277-4636 or visit.