ABB RELION 630 Series Comissioning Manual

Also see for Relion 630 Series: Quick start guide Quick start guide Operation manual Engineering manual Product guide

ABB RELION 630 Series Comissioning Manual Manual pdf 24 page image

2.8 Checking VT circuitsCheck that the wiring is in strict accordance with the supplied connection diagram.Correct possible errors before continuing to test the circuitry.Test the circuitry.• Polarity check• VT circuit voltage measurement (primary injection test)• Earthing check• Phase relationship• Insulation resistance checkThe polarity check verifies the integrity of circuits and the phase relationships. Thepolarity must be measured as close to the protection relay as possible to ensure thatmost of the wiring is also checked.The primary injection test verifies the VT ratio and the wiring all the way from theprimary system to the protection relay. Injection must be performed for each phase-to-neutral circuit and each phase-to-phase pair. In each case, voltages in all phases andneutral are measured.2.9 Checking the RTXP test switchThe RTXP test switch is designed to provide the means of safe testing of the IED. Thisis achieved by the electromechanical design of the test switch and test plug handle.When the test plug handle is inserted, it first blocks the trip and alarm circuits then itshort circuits the CT secondary circuit and opens the VT secondary circuits makingthe IED available for secondary injection.When pulled out, the test handle is mechanically stopped in half withdrawn position.In this position, the current and voltage enter the protection, but the alarm and tripcircuits are still isolated. Before removing the test handle, check that no trip or alarmsare present in the IED.The trip and alarm circuits are not restored for operation until the test handle iscompletely removed.By pulling in all cables, verify that the contact sockets have beencrimped correctly and that they are fully inserted. Never do this withcurrent circuits in service.Section 2 1MRS756801 EStarting up16 630 seriesCommissioning Manual