Sepam - HV/MV Protection and control units (ENG) - Trinet

General characteristicsElectrical testsAimThe aim of these tests is to test the effectivenessof the measures taken to protect peopleand equipment.Preliminary operating testAim: to ensure the integrity of the item being tested(the test procedure allows the device,its integrated components and remote functions to betested at the same time).N.B. The test is not exhaustive. It is merely aimed atproviding a good "macroscopic" view of the item beforeand/or after the applicationof potentially destructive stress, in a minimaltest environment.Grounding continuityAim: to test the continuity of grounding protection.Reference documents:Standards: IEC 61131-2Severity: polarizing current: 30 A.Acceptance criterion: R ≤ 0.1 Ω.Insulation testingMeasurement of insulation resistanceAim: to test the constructive integrity of the item beforedielectric stress is applied.Reference documents:Standards: IEC 60255-5Special conditions: measurement is performed inboth common and differential modes.Severity: applied voltage: 500 V DCAcceptance criterion: R i≥100 MΩ.Dielectric strengthAim: to ensure that the dielectric strength of the insulation complies withspecifications.Reference documents:Standards: IEC 60255-5Acceptance criteria:During the test:c no breakdowns, perforations, warpingAfter the test:c the device must correspond to all of its functional specifications.Severity :circuitstest voltagecommon mode differential modepower supply 2 kVrms/50 Hz N/Alogic inputs 2 kVrms/50 Hz N/Aanalog inputs 2 kVrms/50 Hz N/A (incl. phase currents)logic outputs 2 kVrms/50 Hz 1 kVrms/50 Hz(*)setting terminal socket 0.5 kVrms/50 Hz N/A setting(*): with contacts openImpulse wave withstandAim: to ensure that the device is capable of withstanding high overvoltage for veryshort periods of time without any damage.Reference documents:Standards: IEC 60255-5Acceptance criteria:During the test:c no breakdowns, performations, warpingAfter the test:c the device must correspond to all of its functional specifications.Severity :circuitstest voltagecommon modedifferential modepower supply 5 kV 5 kVlogic inputs 5 kV 5 kVanalog inputs 5 kV 5 kV (incl. phase currents)logic outputs 5 kV N/Apocket terminal socket 1 kV 0.5 kVPower supply circuit robustnessShort-circuit current behaviourAim: to ensure that the device's circuits are capable of withstanding, withoutdamage, stress caused by short-circuit currents resulting from internal failures.Acceptance criteria:During the test:c short-circuit current less than 15 A for a maximum of 20 ms.c effectiveness of protective devices.After the test:c visual check of cabling, connectors, printed circuit paths.c return to normal operation after resetting or replacement of the protective devices.Polarity reversal behaviourAim: to ensure that the device is capable of withstanding, without damage,an accidental power supply polarity reversal.Reference documents:Standards: IEC 61131-2.Severity: operation for at least10 seconds with the power supply polarities reversed.Acceptance criterion:Return to normal operation after the power supply polarities have been correctlyre-established.Installation - Use - General characteristics - Testing3/7