Related FAQ: Can the Compax3 be used at 24volts? Or other dc voltage? (with video)
Yes. All Compax and Compax3 products can take a DC voltage instead of AC voltage input. All drives rated for 240 V input can be supplied up to 340 VDC and all drives rated for 480 V input can be supplied up to 680 VDC.
For the CPX1000SL, 2500S and C3 xxxx V2 products use the following installation connections.
CPX1000SL | CPX2500S | C3 xxxx V2 | |
DC + | X2/1 L | X2/1 L1 | X1/1 L |
DC - | X2/2 N | X2/2 L2 | X1/2 N |
PE | X2/3 PE | X2/3 PE | X1/3 PE |
For the CPX4500S, 8500S, NMD10, NMD20 and C3 xxxx V4 products use the following installations connections.
CPX4500S/8500S | NMD10/20 | C3 xxxx V4 | |
DC + | X2/1 L1 | X2/1 L1 | X2/4 +HV |
DC - | X2/2 L2 | X2/2 L2 | X2/5 -HV |
PE | X2/3 PE | X2/3 PE | X2/3 PE |
For the C3S running on DC power, the internal mains filter has no function, so ensure that the DC power supply includes a DC filter. When the DC voltage is connected to X2, the drive can be supplied up to 680V without any derating. Otherwise, connecting to X1 (using L1 and L2 instead of +HV and -HV) the maximum allowed DC voltage is max 500V. The Compax3's overvoltage protection and regenerative circuitry is active when powering through either X1 and X2.
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