Delta BLD-E1 brushless DC motor drive BLD-E1 Series User Manual download pdf (Page 175)

Appendix B Accessories| BLD-E1 Series

B-2

Revision May 2009, 00DE, V0.50

NOTE

1. If damage to the drive or other equipment is due to the fact that the brake resistors and

the brake modules in use are not provided by Delta, the warranty will be void.

2. Take into consideration the safety of the environment when installing the brake resistors.

3. Definition for Brake Usage ED%

Explanation: The definition of the barking usage ED(%) is for assurance of enough time

for the brake unit and brake resistor to dissipate away heat generated by braking. When

the brake resistor heats up, the resistance would increase with temperature, and brake

torque would decrease accordingly. Suggested cycle time is one minute

100%

Brake Time

Cycle Time

ED% = T1/T0x100(%)

4. Please select the brake unit and/or brake resistor according to the table. “-“ means no

Delta product. Please use the brake unit according to the Equivalent Resistor Value.

5. For safety reasons, install a thermal overload relay between brake unit and brake resistor.

Together with the magnetic contactor (MC) in the mains supply circuit to the drive it offers

protection in case of any malfunctioning. The purpose of installing the thermal overload

relay is to protect the brake resistor against damage due to frequent brake or in case the

brake unit is continuously on due to unusual high input voltage. Under these

circumstances the thermal overload relay switches off the power to the drive. Never let

the thermal overload relay switch off only the brake resistor as this will cause serious

damage to the brushless DC motor drive.

R/L1

S/L2

T/L3

NFB

BLD

MOTOR

O.L.

U/T1

V/T2

W/T3

-N

()

R/L1

S/L2

T/L3

O.L.

Thermal

Overload

Relay or

temperature

switch

Surge

Absorber

Thermal Overload

Relay

Brake

Resistor

Brake

Unit

-N

()

Note1: When using the drive with DC reactor, please refer to wiring diagram in the drive

user manual for the wiring of terminal +(P) of Brake unit.

Note2: wire terminal -(N) to the neutral point of power system.Do NOT

Temperature

Switch

1 2 ... 170 171 172 173 174 175 176 177 178 179 180 ... 185 186

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Delta BLD-E1 brushless DC motor drive BLD-E1 Series User Manual Page 175

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