Eaton NOVA 15i Installation And Operation Instructions Manual
Also see for COOPER POWER SERIES: Installation and operation instructionsInstallation instructionsInstallation instructionsInstallation and operation instructionsOperation instructions
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20Effective January 2017NOVA® 15i, NOVA 27i, and NOVA 38i; Three-phasemicroprocessor-controlled; installation and operationinstructions (S280-43-1)Instructional Literature IL0104001EHigh-potential withstand testingUse the following procedures to perform high-potential withstandtests at 75% of the rated low-frequency withstand voltage for 60seconds. See Table 8 for test voltages and Figure 20 for testconnection diagrams.Test results for NOVA i reclosers equipped with the internalvoltage sensing option will be influenced by the source-to-groundconnected sensing resistor, especially if dc high-potential testing isperformed.TEST 31. Open the recloser contacts.2. Ground the recloser.3. Connect and ground terminals 1, 3, and 5 (see Figure 9).4. Connect terminals 2, 4, and 6.5. Apply proper test voltage to terminals 2, 4, and 6.6. The recloser should withstand the test voltage for 60 seconds.7. Reverse the connections: ground terminals 2, 4, and 6.8. Apply test voltage to terminals 1, 3, and 5 for 60 seconds.9. The recloser should withstand the test voltage for 60 seconds.TEST 11. Close the recloser contacts.2. Ground the recloser.3. Connect terminals 2, 4, and 6 (see Figure 9) together.4. Apply proper test voltage (see Table 8) to terminals 2, 4, and 6.5. The recloser should withstand the test voltage for 60 seconds.TEST 21. Close the recloser contacts.2. Ground the recloser.3. Ground Phase A (terminal 2) and Phase C (terminal 6).4. Apply proper test voltage to Phase B (terminal 3).5. The recloser should withstand the test voltage for 60 seconds.Hazardous voltage. The switchgear and high voltage transformer must bein a test cage or similar protective device to prevent accidental contactwith the high voltage parts. Solidly ground all equipment. Failure tocomply can result in death, severe personal injury, and equipmentdamage.WARNINGRadiation. At voltages up to the specified test voltages, the radiationemitted by the vacuum interrupter is negligible. However, above thesevoltages, radiation injurious to personnel can be emitted. See ServiceInformation S280-90-1, Vacuum Interrupter Withstand Test VoltageRatings Information for further information.WARNING135246acTEST 1Phase to ground135246acTEST 2Phase to phase135246acOpen contact135246acOpen contactTEST 3Figure 20.Connection diagrams for high-potential withstand testing.* Approximately 0.53mA additional leakage current with internalvoltage sensors.††Approximately 0.32mA additional leakage current with internalvoltage sensors.** Approximately 0.37mA additional leakage current with internalvoltage sensors.Table 8NOVA i Recloser withstand test voltage ratings information.75% of Rated Low-FrequencyWithstand Voltage(1 minute dry) (kV rms)Description ac dcNOVA 15i 37.5 53.0 *NOVA 27i 45.0 63.5NOVA 38i 52.5 74.2 ** |
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