04 Wiring | REG2000
4-7
3. Multiple REG2000 Wiring in Parallel
The following are important points for your attention.
A. Install a maximum of four Power Regenerative Units working in parallel at the same time.
1) Follow the motor drive specifications to choose the appropriate non-fuse breaker (NFB) and the
magnetic contactor (MC).
2) Connect an input reactor to a motor drive following the instructions in the user manual. A 3% AC
input reactor is recommended. Connect an input reactor to the motor drive with the shortest
distance possible.
3) See Section 5-3 to choose an appropriate fuse.
4) The maximum cable length between a REG2000 and an EMI filter cannot be more than 10 m.
Remove the RFI jumper before you install an EMI filter.
5) DO NOT install any other Power Regenerative Unit on the common DC BUS.
6) The maximum cable length between DC+ and DC- cannot be more than 5 m. Twisted pair is
recommended.
7) Follow the wiring diagram to install the DC reactor (standard accessory) to reduce the
electromagnetic interference (EMI) and to increase the work efficiency.
8) Follow the specifications in Section 5-4 to choose an appropriate EMI filter to avoid strong
electromagnetic interference (EMI).
B. A DC choke is required. Install the DC choke as close to each Power Regenerative Unit as possible.
C. Refer to the following diagram for wiring in parallel mode. Note that the wiring that connects to Power
Regenerative Unit 2 comes from the AC motor drive DC BUS, and not directly from Power
Regenerative Unit 1. Using copper bars for wiring is highly recommended.
D. The following diagram shows wiring in parallel mode. Refer to Pr.02-00–Pr.02-04 for detailed wiring of
multi-function input terminal (MIx, default setting is MI5) to connect to the terminal DCM. Working in
parallel, each Power Regenerative Unit reduces its current limit to 80% automatically. If the Power
Regenerative Unit is in parallel mode, and continuous regenerative power is required, you can still
select the capacity for single units based on 80% of the rated output.
Multiple REG2000 Wiring Diagram in Parallel
