be installed to get a open air convection and prevent contact withcombustible material to the surface.22.1.2 Injection unit REX060 from rear side22.1.2.1 Injection unit REX060Rotor InjectionPower SupplyBackPlaneFront-plateBack view Front viewPowerconnectorIED andInjectionconnectorsPowerStatorRotorStator InjectionTop viewHMI and Logic1 1 118185X11 X61 X81Injection switch1515X62 X82IEC11000018-1-en.vsdIEC11000018 V1 ENFigure 568: Rear and top view of injection unit REX06022.2 Injection unit REX06022.2.1 IntroductionThe injection unit REX060 is used to inject voltage and current signals to the generatoror motor stator and rotor circuits. REX060 generates two square wave signals withdifferent frequencies for injection into the stator and rotor circuits respectively. Theresponse from the injected voltage and currents are then measured by the REX060 unitand amplified to a level suitable for the analog voltage inputs of IED.22.2.2 DesignREX060 consists of a standard enclosure (6U, 1/2 x 19"). In this enclosure, themodules for stator (SIM) and/or rotor (RIM) earth fault protection are installed. Thestator injection transformer and the power supply are also installed inside theenclosure.On the front of the enclosure there is a backlit LCD, control buttons and a key switch.Section 22 1MRK502052-UEN BInjection equipment hardware1226Technical manual
