Eaton VR+ Series Supplemental Instructions

Also see for VR+ Series: Instruction book Instruction book

 WARNINGAPPLYING ABNORMALLY HIGH VOLTAGE ACROSS A PAIROF CONTACTS IN VACUUM MAY PRODUCE X-RADIATION.THE RADIATION MAY INCREASE WITH THE INCREASEIN VOLTAGE AND/OR DECREASE IN CONTACT SPACING.X-RADIATION PRODUCED DURING THIS TEST WITHRECOMMENDED VOLTAGE AND NORMAL CONTACTSPACING IS EXTREMELY LOW AND WELL BELOWMAXIMUM PERMITTED BY STANDARDS. HOWEVER, ASA PRECAUTIONARY MEASURE AGAINST POSSIBILITY OFAPPLICATION OF HIGHER THAN RECOMMENDED VOLTAGEAND/OR BELOW NORMAL CONTACT SPACING, IT ISRECOMMENDED THAT ALL OPERATING PERSONNEL STANDAT LEAST ONE METER AWAY IN FRONT OF THE CIRCUITBREAKER.Vacuum Interrupter Integrity Testotee:N Roll over each high potential test diagram configuration above to see thecorrect lead connection to the equipment.otee:N The secondary disconnect must be grounded during test.Vacuum interrupters used in Type VR-Series+ circuitbreakers are highly reliable interrupting elements.Satisfactory performance of these devices is dependentupon the integrity of the vacuum in the interrupter andthe internal dielectric strength. Both of these parameterscan be readily checked by a one minute ac high potentialtest, using the appropriate test voltage in the followingtable.Circuit breaker Rated MaximumVoltageVacuum Interrupter IntegrityTest Voltageac 60HzUp to and including 15.0 kV 27 kV WARNINGDC HI-POTENTIAL TESTS ARE NOT RECOMMENDED BY EATON. DO NOT APPLYDC AT ANY LEVEL TO VR-SERIES+ POWER CIRCUIT BREAKERS.With the circuit breaker open and securely sitting on the floor, connectall top/front primary studs (bars) together and the high potential machinelead. Connect all bottom/rear studs together. Do not ground them tothe circuit breaker frame. Start the machine at zero potential, increase toappropriate test voltage and maintain for one minute.Successful withstand indicates that all interrupters have satisfactoryvacuum level. If there is a breakdown, the defective interrupter orinterrupters should be identified by an individual test and replaced beforeplacing the circuit breaker in service.After the high potential unit is removed, discharge any electrical chargethat may be retained. This charge is particularly true from the center shieldof vacuum interrupters. To avoid any ambiguity in the ac high potentialtest due to leakage or displacement (capacitive) current, the test unitshould have sufficient volt-ampere capacity. It is recommended that theequipment be capable of delivering 25 milliamperes for one minute.The current delivery capability of 25 mA ac and 5 mA dc apply whenall three VI’s are tested in parallel. If individual VI’s are tested, currentcapability may be one third of these values.Vacuum Interrupter Integrity Testing ConfigurationG/RLead G/RLeadG/RLeadOSLeadC B AG/RLeadOS Lead = Output Signal LeadG/R Lead = Ground / Return Lead4EATON | Visual Instruction Booklet Essentials | November 2018