Vacon NX User Manual
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Contents
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10vacon • 162 ACTIVE FRONT END (NXA)10.8 Pre-Charcing circuitThe Active Front End unit requires an external pre-charging circuit. The purpose of the pre-charging unit is to charge the voltage in the intermediate circuit to a level sufficient for connectingthe Active Front End unit to the mains. The charging time depends on the capacitance of theintermediate circuit and the resistance of the charging resistors. The technical specifications ofVacon's standard pre-charging circuits are shown in Table 63. Pre-charging circuits are suitablefor 380-500 Vac and 525-690 Vac.The pre-charging components can be ordered separately. Components of the pre-charging circuitare 2 pcs charging resistors, the contactor, the diode bridge and the snubber capacitor, seeTable 64. Each pre-charging circuit has maximum charging capacity, see Table 63. If thecapacitance of the intermediate circuit in the system exceeds the values shown, please contact thenearest Vacon office.Table 63. Capacitance Min and Max value for Pre-charging circuitPre-charging circuit ratingsPre charging type ResistanceCapacitanceMinCapacitanceMaxCHARGING-AFE-FFE-FI9 2 x 47 R 4950 μF 30000 μFCHARGING-AFE-FFE-FI10 2 x 20 R 9900 μF 70000 μFCHARGING-AFE-FFE-FI13 2 x 11 R 29700 μF 128000 μFTable 64. Type designation code for the pre-charging components configurationFI9 AFE / CHARGING-AFE-FFE-FI9Item Q‘ty Description Manufacturer Product Code1 1 Diode Bridge Semikron SKD 822 2 Charcing resistors Danotherm CAV150C47R3 1 Snubber capacitor Rifa PHE4484 1 Contactor Telemecanique LC1D32P7FI10 AFE / CHARGING-AFE-FFE-FI10Item Q‘ty Description Manufacturer Product Code1 1 Diode Bridge Semikron SKD 822 2 Charcing resistors Danotherm CBV335C20R3 1 Snubber capacitor Rifa PHE4484 1 Contactor Telemecanique LC1D32P7FI13 AFE / CHARGING-AFE-FFE-FI13Item Q‘ty Description Manufacturer Product Code1 1 Diode Bridge Semikron SKD 822 2 Charcing resistors Danotherm CBV335C11R3 1 Snubber capacitor Rifa PHE4484 1 Contactor Telemecanique LC1D32P7Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com |
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