2007-07-19
NFB R/L1 S/L2 T/L3 O.L. MC SA Surge Absorber MC R/L1 S/L2 T/L3 U/T1 V/T2 W/T3 IM MOTOR + (P ) B1 Thermal Overload Relay O.L. Braking BR Resistor
Voltage
5011025906-US07
VFDB Series Braking Modules Instruction Sheet
Preface
Thank you for choosing DELTA's braking module. VFDB braking units are applied to absorb the motor regeneration energy when the three-phase induction motor stops by deceleration. With VFDB braking unit, the regeneration energy will be dissipated in dedicated braking resistors. To prevent mechanical or human injury, please refer to this instruction sheet before wiring. VFDB braking units are suitable for DELTA AC Motor Drives VFD Series 230V/460V/575V. VFDB braking units need to be used in conjunction with BR series braking resistors to provide the optimum braking characteristics. VFDB braking units (2015, 2022, 4030, 4045 and 5055) are approved by Underwriters Laboratories, Inc. (UL) and Canadian Underwriters Laboratories (cUL). The content of this instruction sheet may be revised without prior notice. Please consult our distributors or download the most updated version at http://www.delta.com.tw/industrialautomation.
Temperature Switch Note1: When using the AC drive with DC reactor, please refer to wiring diagram in the AC drive user manual for the wiring of terminal +(P) of Braking unit. Note2: Do NOT wire terminal -(N) to the neutral point of power system.
Thermal Overload Relay or temperature switch
VFD + ( P ) Series
-( N) E.F DCM
- ( N ) VFDB Braking RA Unit B2 RC
5. The AC Motor Drive and braking unit will be electrified at the same time while turning on the NFB (No-fuse breaker). For the operation/stop method of the motor, please refer to the user manual of the AC Motor Drives VFD Series. The braking unit will detect the inner DC voltage of the AC motor drive when it stops the motor by deceleration. The extra regeneration will be dissipated away rapidly by the braking resistor in the form of heat. It can ensure the stable deceleration characteristic.

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