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5.5 Installing Power Wiring from an External DC Bus to the Drive's
Internal DC Bus Terminals
Use the following steps to connect DC input power to the drive:
Step 1. Wire the DC input power leads by routing them according to drive type. Refer to figures 4.1
through 4.6. Tables 3.3 through 3.7 contain the recommended power wiring sizes.
On 15 HP drives, route the power leads through the bottom right opening of the drive base.
On 7.525 HP drives, route the power leads through the bottom middleright opening of the
drive base. If the snubberresistor braking option is used, route the power leads through the
bottom right opening.
On 2560 HP drives, route the power leads through the top right or bottom right openings of
the drive base.
On 60100 HP drives, route the power leads through the bottom left opening of the cover.
On 100150 HP drives, route the power leads through the top left opening of the cover.
CAUTION:
Do not route signal and control wiring in the same conduit with power wiring. This can cause
interference with drive operation. Failure to observe this precaution could result in damage to or destruction
of the equipment.
CAUTION:
If the GV3000 drive is connected to an external DC bus, the user is responsible for DC bus
shortcircuit protection. Failure to observe this precaution could result in damage to or destruction of the
equipment.
Step 2. Connect the DC input power leads (twowire 620 VDC nominal) to the proper terminals
according to drive type.
On 160 HP drives, connect the DC input power leads to ter and - on the power
terminal strip.
On 60150 HP drives, connect the DC input power leads to terminals 45 and 47.
Note that the maximum discharge rate of the DC bus supply should be 200V/second.
Step 3. Tighten the DC input power terminals to the proper torque as shown in table 5.1.
Step 4. On 60150 HP drives using volts/hertz regulation, set parameter H.017 to a value greater
than one to enable DC bus operation. Refer to the GV3000 Programming instruction
manual (D23339) for additional information.
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