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2.3 <strong>Emotron</strong> AFR features2.3.1 Power-up and DC-link chargingPower up and charge control of the <strong>Emotron</strong> AFR andDC-link (U dc ) is handled via the dedicated control board(CB) relays 1 and 3, where Charge contactor (K2) control isfixed to CB Relay1 and Main contactor (K1) is fixed to CBRelay3.Typical charge time is 3-5s and an additional delay after K1activation of 1s is added before Run (or Auto ID) commandis acknowledged.Fig. 5UdcUdc,refUdc PICB DI1: RunCB DI1: EnableCB Re 1: Charge (K2)CB Re 2: Option (OK)CB Re 3: Main (K1)DC-link voltage (U dc ) charge control.Optional signal Running OK, i.e. U dc under control, issignaled via default CB Relay2 selection ‘Option’ and ispreferably used to enable the VSIs in order to interlock theAFR and VSIs. Typical time delay is
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