Delta Electronics VFD-E manual Terminals +/B1, B2 for connecting brake resistor

Chapter 2 Installation and Wiring

„The factory setting of the operation direction is forward running. The methods to control the operation direction are: method 1, set by the communication parameters. Please refer to the group 9 for details. Method2, control by the optional keypad KPE-LE02. Refer to Appendix B for details.

„When it needs to install the filter at the output side of terminals U/T1, V/T2, W/T3 on the AC motor drive. Please use inductance filter. Do not use phase-compensation capacitors or L-C (Inductance-Capacitance) or R-C (Resistance-Capacitance), unless approved by Delta.

„DO NOT connect phase-compensation capacitors or surge absorbers at the output terminals of AC motor drives.

„Use well-insulated motor, suitable for inverter operation.

Terminals [+/B1, B2] for connecting brake resistor

BR

BR

+/B1	B1	B2
	B2 or for m odels VFDxxExxT

„Connect a brake resistor or brake unit in applications with frequent deceleration ramps, short deceleration time, too low brake torque or requiring increased brake torque.

„If the AC motor drive has a built-in brake chopper (frame B, frame C and VFDxxxExxT models), connect the external brake resistor to the terminals [+/B1, B2].

„Models of frame A don’t have a built-in brake chopper. Please connect an external optional brake unit (BUE-series) and brake resistor. Refer to BUE series user manual for details.

BR

BUE

Brake resistor/unit(optional)

Please refer to Appendix B for details.

+-

„Connect the terminals [+(P), -(N)] of the brake unit to the AC motor drive terminals [+/B1, - ]. The length of wiring should be less than 5m with cable.

„When not used, please leave the terminals [+/B1, -] open.

WARNING!

Short-circuiting [B2] or [-] to [+/B1] can damage the AC motor drive.

Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11 2-15