ABB RET670 Installation And Commissioning Manual

Also see for RELION RET670: Operator's manual Commissioning manual Product guide Installation manual Commissioning manual

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ABB RET670 Installation And Commissioning Manual Manual pdf 168 page image

UL1UL2UL3UNUL1UL1UL2UL3IED TEST SETIEDIEC07000108-1-en.vsdUL2UL3UN12IEC07000108 V2 ENFigure 65: Connection of the test set to the IED for test of alarm levels,trip levels and trip timerwhere:1 is three-phase voltage group1 (U1)2 is three-phase voltage group2 (U2)2. Apply 1.2 · Ur (rated voltage) to the U1 and U2 inputs.3. Decrease slowly the voltage of in phase UL1 of the test set until the ALARMsignal is activated.The ALARM signal is delayed with timer tAlarm4. Check the alarm operation level by comparing the differential voltage level atALARM with the set alarm level UDAlarm.5. Continue to slowly decrease the voltage until START signal is activated.6. Check the differential voltage operation level by comparing the differentialvoltage level at START with the set trip level UDTrip.7. Repeat steps 1 to 2 to check the other phases.Observe that the connections to U1 must be shifted to test another phase.(UL1 to UL2, UL2 to UL3, UL3 to UL1)13.7.5.3 Check of trip and trip reset timersProcdureSection 13 1MRK 504 088-UEN CVerifying settings by secondary injection162Installation and commissioning manual