Product Information VD520 Series Inverter User Manual
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LED
J6
CPU
+10V
+5V
V
A
A
A
V
AI2
AO1
V
AO2
+24V
COM
J15
J3 J4
J5
J14
J7
485+
485-
5/10V
AI2
AO1
HDI1
DI2
T1/B
T1/C
PE
GND
DI3
GND
DI1
AO2
AI1
T1/A
COM
+24V
OPEN
DI4
DI5
COM HDO1
DO1
T2/A
T2/C
+24V
COM
J19
● This inverter keyboard can be directly connected.
● A holder can be added to keyboard, but need to order separately.
2.8 Braking Unit Model Selection Guide
2.8.1 Resistor Value Selection
The regenerative energy of the motor is almost all consumed in the braking resistor when braking.
According to formula U*U/R=Pb
In formula U---braking voltage when system is stability braking (different system with different value,
for AC380V system, it generally take DC700V)
Pb----braking power
2.8.2 Braking Resistor Power Selection
Theoretically, braking resistor power is the same with braking power, but in consideration that the
de-rating is 70%,
According to formula: 0.7Pr=Pb*D
Pr----power of resistor
D----braking frequency (percentage of regenerating process account for the complete process)
Elevator----20%~30%
Uncoiling and recoiling----20%~30%
Centrifuge----50%~60%
Accidental braking loading----5%
General take 10%
Table 2-4 Inverter braking unit selection
Model
Recommend
Power Braking
Resistor
Recommend
Resistance
Braking
Resistor
Braking
Unit
Remarks
Single-phase 220V 50/60Hz
VD520-2S-0.7GB
80W
≥150Ω
Internal
No special
instructions
VD520-2S-1.5GB
100W
≥100Ω
VD520-2S-2.2GB
100W
≥70Ω
VD520-2S-3.7GB
200W
≥40Ω
VD520-2S-5.5GB
300W
≥25Ω
Three-phase 380V 50/60Hz
VD520-4T-0.7GB
150W
≥300Ω
Internal
No special
instructions
VD520-4T-1.5GB
150W
≥220Ω
VD520-4T-2.2GB
250W
≥200Ω
VD520-4T-3.7GB/5.5PB
300W
≥130Ω
VD520-4T-5.5GB/7.5PB
400W
≥90Ω