Delta VFD-E User Manual

Chapter 1 Introduction|
1-12 Revision Jan. 2009, 06EE, SW--PW V1.12/CTL V2.12
1.2.2 DC-bus Sharing: Connecting the DC-bus of the AC Motor Drives
in Parallel
1. This function is not for VFD-E-T series.
2. The AC motor drives can absorb mutual voltage that generated to DC bus when
deceleration.
3. Enhance brake function and stabilize the voltage of the DC bus.
4. The brake module can be added to enhance brake function after connecting in parallel.
5. Only the same power system can be connected in parallel.
6. It is recommended to connect 5 AC motor drives in parallel (no limit in horsepower but
these 5 drives should be the same power system).
U V W U V W U V W U V W
IM IM IM IM
Power 208/220/230/380/440/480 (depend on models)
power should be applied at the same time
(only the same power system can be connected in parallel)
Brake
module
For frame A, terminal + (-) is connected to the terminal + (-) of the brake module.
For frame B, C and D, terminal +/B1 (-) is connected to the terminal + (-) of the brake module.

Delta VFD-E Specifications

General

Protection Features	IP20
Enclosure Rating	IP20
Overload Capacity	150% for 60 seconds
Braking Unit	Built-in
Control Mode	V/F, Sensorless Vector
Protection Functions	Overcurrent, Overvoltage, Undervoltage, Overheating, Short Circuit
Operating Temperature	-10°C to +50°C
Analog Inputs	2 (0-10V, 4-20mA)
Analog Outputs	1 (0-10V)
Communication Interface	RS-485
Output Voltage	3-phase, equal to input voltage
Power Range	0.4kW to 7.5 kW
Storage Temperature	-20°C to +60°C
Humidity	90% RH (non-condensing)
Cooling Method	Fan cooled
Digital Outputs	1 relay output