ELSP current-limiting backup fuse catalog - Eaton

1 Effective March 2020. COOPER POWER. catalog Data CA132013EN Supersedes March 2019 SERIES. ELSP current - limiting backup fuse General Eaton offers its Cooper Power series ELSP. current - limiting backup fuse that is used in series with low current primary protection devices such as a Bay-O-Net fuse or its Cooper Power series MagneX interrupter. The ELSP fuse is designed for use in transformer oil, Envirotemp FR3 fluid, or an approved equivalent. The fuse 's highly efficient current - limiting section minimizes the effects of high fault current stresses on equipment and the distribution system. Its minimum interrupting rating is coordinated with that of a low current interrupter to avoid undesirable low current operation; yet its maximum interrupting rating will clear the highest fault currents likely to occur.

2 Higher continuous current ratings can be achieved by connecting two fuses in parallel. Application The ELSP fuse is used in transformers to protect and isolate faulted equipment. When connected in series with a low current primary protection device, the fuse becomes an element of a two-part protection system that gives a full range of fault protection. This two-part system provides low current protection with the replaceable expulsion fuse or resettable MagneX interrupter, and it adds the energy- limiting protection of a current - limiting fuse . Together, they coordinate easily with upstream and downstream devices. catalog Data CA132013EN ELSP current - limiting backup fuse .

3 Effective March 2020 .. HIGH PURITY SILICA SAND FILLER. Specific particle size, purity, and MICA SPIDER. compaction gives the heat-absorbing Provides stable winding and arc-quenching properties support without generating necessary for consistent clearing and gas and pressure buildup low energy let-thru levels. during fuse operation. A. B. C. SOLID COPPER END CAPS. Brass inserts are tapped for attachment of a 1/4 inch - FIBERGLASS HOUSING. 20 x 1/2 inch lead hardware. Provides strength and maintains fuse ELEMENT. integrity of fuse during any Stable under current cycling interruption, from minimum and thermal stress, providing melt current to maximum rated consistent melt characteristics.

4 DOUBLE SEALING current of 50 kA. The ribbons effectively control SYSTEM Buna-N rubber and minimize peak arc voltage gasket and epoxy sealant levels resulting from high current ensures seal performance interruptions. During interruption, and integrity. INDELIBLE IDENTIFICATION LABEL the element effectively controls Easy-to-read voltage and current and limits both current and ratings and catalog numbers. Includes bar code energy (l2t) let-thru levels. for easy inventory tracking or QC auditing. Figure 1. 2 inch diameter ELSP current - limiting backup fuse cutaway shows design characteristics NNote: Dimensions given are for reference only. B. C. Figure 2. 3 inch diameter ELSP current - limiting backup fuse photograph shows design characteristics See Table 3 for dimensional values.

5 NNote: Dimensions given are for reference only. Installation Production tests No special tools are required. The fuse is liquid immersed, mounted Tests are conducted on 100 percent of production in accordance as near as possible to the incoming primary bushing to which it is with Eaton requirements. connected. Normal liquid dielectric clearances should be used. Refer Physical Inspection to Service Information MN132001EN ELSP current - limiting backup fuse Installation Instructions for details. I2t Testing Resistance Testing Helium Mass Spectrometer Leak Testing 2 Eaton ELSP current - limiting backup fuse catalog Data CA132013EN. Effective March 2020.. Table 1.

6 Electrical ratings and characteristics fuse type Maximum interrupting current kV kV backup C rated 50,000 A rms symmetrical kV backup C rated 43,000 A rms symmetrical 23 kV backup C rated 31,000 A rms symmetrical . 38 kV backup C rated 50,000 A rms symmetrical . 23 kV, 150 A fuse is rated to 50,000 A rms symmetrical. 38 kV, 200 A fuse is rated to 26,000 A rms symmetrical due to test lab limitations. Table 2. Interrupting ratings kV kV kV. Continuous Minimum Minimum Maximum Minimum Minimum Maximum Minimum Minimum Maximum current interrupting melt I2t clear I2t interrupting melt I2t clear I2t interrupting melt I2t clear I2t rating (A) capacity (A) (A2 s) (A2 s) capacity (A) (A2 s) (A2 s) capacity (A) (A2 s) (A2 s).

7 30 200 1,800 9,400 200 1,800 9,500 200 1,800 10,000. 40 250 2,900 14,000 250 2,900 14,000 250 2,900 19,000. 50 330 6,300 30,000 330 6,300 30,000 330 6,300 33,000. 65 400 9,300 33,000 400 9,300 34,000 400 9,300 40,000. 80 300 11,600 56,000 300 11,600 56,000 350 11,600 62,000. 100 450 20,600 76,000 450 20,600 76,000 450 20,600 116,000. 125 470 32,100 120,000 500 32,100 150,000. 150 700 58,500 290,000 700 58,500 260,000. 165 800 82,200 395,000 800 82,200 365,000. 180 900 103,100 485,000 900 103,100 445,000. 250 1,000 148,500 690,000 . 250 1100 128,500 500,000. 300 1,300 234,200 1,280,000 1230 234,200 1,300,000. 330 1,500 328,900 1,700,000 . 360 1,800 412,500 2,100,000.

8 500 2,000 594,000 2,500,000 . kV 23 kV 38 kV. Continuous Minimum Minimum Maximum Minimum Minimum Maximum Minimum Minimum Maximum current interrupting melt I2t clear I2t interrupting melt I2t clear I2t interrupting melt I2t clear I2t rating (A) capacity (A) (A2 s) (A2 s) capacity (A) (A2 s) (A2 s) capacity (A) (A2 s) (A2 s). 30 200 1,800 10,000 200 1,800 12,000 . 40 250 2,900 19,500 250 2,900 20,000 . 50 330 6,300 34,000 330 6,300 39,000 450 3,870 30,600. 65 400 9,300 42,000 400 9,300 44,000 490 7,160 39,300. 80 350 11,600 62,000 300 11,600 70,000 625 11,450 60,700. 100 450 20,600 116,000 450 20,600 120,000 635 16,100 80,500. 120 700 21,200 118,000. 125 500 32,100 150,000 465 32,100 180,000.

9 140 800 36,240 163,000. 150 700 58,500 320,000 . 165 900 82,200 430,000 . 200 900 95,400 496,100. 250 900 128,500 650,000 . 300 1200 234,200 1,300,000 . 330 1500 328,900 1,700,000 . NNotes: 1. The kV, 80 A and 100 A ratings have been tested and approved for application at kV. 2. The kV, 80 A through 125 A ratings have been tested and approved for application at kV. The maximum interrupting rating for the kV fuse , 80 A through 125 A at kV is 43 kA. For the 23 kV, 250 A fuse (parallel 125 A). the maximum interrupting rating is 12 kA. Parallel fuses (200 A, 38 kV rated fuse consists of two 120 A, 38 kV fuses (P/N CBUC38120D100) in parallel. Eaton 3. catalog Data CA132013EN ELSP current - limiting backup fuse .)

10 Effective March 2020 .. Ordering information New part numbering guide To order an ELSP current - limiting fuse , de ter mine the am per age and C = Cooper voltage ratings of the ap pli ca tion and specify the fuse required from B = backup Table 3. For parallel fusing, order two fuses. U = Under-oil C = Clamp-mounted XX = Voltage rating XXX = current rating C = 2 inch D = 3 inch 1 = Single-barrel design 00 = Revision code M = Metric end connection Table 3. Dimensional information Diameter tube Dimension A Dimension B Dimension C. current (See Figure 1) (See Figures 1, 2) (See Figures 1, 2). Voltage (kV) rating (A) ELSP part numbers Inches (mm) Inches (mm) Inches (mm) Description 30 CBUC08030C100 (183) (152) (53) kV 30 A.