D.8.1 Selecting the braking components
When a VFD driving a high-inertia load decelerates or needs to decelerate abruptly, the motor runs in the power generation state and transmits the load-carrying energy to the DC circuit of the VFD, causing the bus voltage of the VFD to rise. If the bus voltage exceeds a specific value, the VFD reports an overvoltage fault. To prevent this from happening, you need to configure brake components.
| • The design, installation, commissioning, and operation of the device must be performed by trained and qualified professionals. • Follow all the "Warning" instructions during the operation. Otherwise, major physical injuries or property loss may be caused. • Only qualified electricians are allowed to perform the wiring. Otherwise, damage to the VFD or brake components may be caused. • Read the brake resistor or unit instructions carefully before connecting them to the VFD. • Connect brake resistors only to the terminals PB and (+), and brake units only to the terminals (+) and (-). Do not connect them to other terminals. Otherwise, damage to the brake circuit and VFD and fire may be caused. |
| • Connect the brake components to the VFD according to the wiring diagram. If the wiring is not properly performed, damage to the VFD or other devices may be caused. |
D.8.1.1 AC 3PH 380V(-15%)–440V(+10%)
Goodrive300 series VFDs of 380V (≤30kW) are equipped with built-in brake units, and those of 380V (≥37kW) need to be configured with external brake units. Select brake resistors according to the specific requirements (such as the brake torque and brake usage requirements) on site.
Model | Model of braking unit | Brake resistor value matched with 100% brake torque (Ω) | Dissipation power of brake resistor (kW) (10% brake) | Dissipated power of brake resistor (kW) (50% brake) | Dissipated power of brake resistor (kW) (80% brake) | Min allowed brake resistor (Ω) |
GD300-1R5G-4 | Embedded braking units | 326 | 0.23 | 1.1 | 1.8 | 170 |
GD300-2R2G-4 | 222 | 0.33 | 1.7 | 2.6 | 130 | |
GD300-004G-4 | 122 | 0.6 | 3 | 4.8 | 80 | |
GD300-5R5G-4 | 89 | 0.75 | 4.1 | 6.6 | 60 | |
GD300-7R5G-4 | 65 | 1.1 | 5.6 | 9 | 47 | |
GD300-011G-4 | 44 | 1.7 | 8.3 | 13.2 | 31 | |
GD300-015G-4 | 32 | 2 | 11 | 18 | 23 | |
GD300-018G-4 | 27 | 3 | 14 | 22 | 19 | |
GD300-022G-4 | 22 | 3 | 17 | 26 | 17 | |
GD300-030G-4 | 17 | 5 | 23 | 36 | 17 | |
GD300-037G-4 | DBU100H-060-4 | 13 | 6 | 28 | 44 | 11.7 |
GD300-045G-4 | DBU100H-110-4 | 10 | 7 | 34 | 54 | 6.4 |
GD300-055G-4 | 8 | 8 | 41 | 66 | ||
GD300-075G-4 | 6.5 | 11 | 56 | 90 | ||
GD300-090G-4 | DBU100H-160-4 | 5.4 | 14 | 68 | 108 | 4.4 |
GD300-110G-4 | 4.5 | 17 | 83 | 132 | ||
GD300-132G-4 | DBU100H-220-4 | 3.7 | 20 | 99 | 158 | 3.2 |
GD300-160G-4 | DBU100H-320-4 | 3.1 | 24 | 120 | 192 | 2.2 |
GD300-200G-4 | 2.5 | 30 | 150 | 240 | ||
GD300-220G-4 | DBU100H-400-4 | 2.2 | 33 | 165 | 264 | 1.8 |
GD300-250G-4 | 2.0 | 38 | 188 | 300 | ||
GD300-280G-4 | Two DBU100H-320-4 | 3.6×2 | 21×2 | 105×2 | 168×2 | 2.2×2 |
GD300-315G-4 | 3.2×2 | 24×2 | 118×2 | 189×2 | ||
GD300-350G-4 | 2.8×2 | 27×2 | 132×2 | 210×2 | ||
GD300-400G-4 | 2.4×2 | 30×2 | 150×2 | 240×2 | ||
GD300-500G-4 | Two DBU100H-400-4 | 2×2 | 38×2 | 186×2 | 300×2 | 1.8×2 |
Note:
1. Select the resistor and power of the brake unit according to the data our company provided.
2. The brake resistor may increase the brake torque of the VFD. The preceding table describes the resistance and power for 100% brake torque, 10% brake usage, 50% brake usage, and 80% brake usage. You can select the brake system based on the actual operation conditions.
3. When using an external brake unit, set the brake voltage class of the brake unit properly by referring to the manual of the dynamic brake unit. If the voltage class is set incorrectly, the VFD may not run properly.
| • Never use a brake resistor with a resistance below the minimum value specified for the particular drive. The drive and the internal chopper are not able to handle the overcurrent caused by the low resistance. |
| • Increase the power of the braking resistor properly in the frequent braking situation (the frequency usage ratio is more than 10%). |
D.8.1.2 AC 3PH 380V(-10%)V–550V(+10%)
The VFDs of 500V (≤18.5kW) have embedded braking units but the VFDs of 500V (≥22kW) have optional braking units. Please select the braking resistor according to actual operation (such as the brake torque and brake usage requirements).
Model | Model of braking unit | Brake resistor value matched with 100% brake torque (Ω) | Dissipation power of brake resistor (kW) (10% brake) | Dissipated power of brake resistor (kW) (50% brake) | Dissipated power of brake resistor (kW) (80% brake) | Min allowed brake resistor (Ω) |
GD300-004G-5 | Embedded braking units | 202.5 | 0.60 | 3.0 | 4.8 | 20 |
GD300-5R5G-5 | 147.3 | 0.83 | 4.1 | 6.6 | 20 | |
GD300-7R5G-5 | 108.0 | 1.13 | 5.6 | 9.0 | 20 | |
GD300-011G-5 | 73.6 | 1.65 | 8.3 | 13.2 | 20 | |
GD300-015G-5 | 54.0 | 2.25 | 11.3 | 18.0 | 20 | |
GD300-018G-5 | 43.8 | 2.78 | 13.9 | 22.2 | 20 | |
GD300-022G-5 | DBU100H-110-6 | 36.8 | 3.30 | 16.5 | 26.4 | 10.0 |
GD300-030G-5 | 27.0 | 4.50 | 22.5 | 36.0 | 10.0 | |
GD300-037G-5 | 21.9 | 5.55 | 27.8 | 44.4 | 10.0 | |
GD300-045G-5 | 18.0 | 6.75 | 33.8 | 54.0 | 10.0 | |
GD300-055G-5 | 14.7 | 8.25 | 41.3 | 66.0 | 10.0 | |
GD300-075G-5 | 10.8 | 11.25 | 56.3 | 90.0 | 10.0 |
Note:
1. Select brake resistors according to the resistance and power data provided by our company.
2. The brake resistor may increase the brake torque of the VFD. The preceding table describes the resistance and power for 100% brake torque, 10% brake usage, 50% brake usage, and 80% brake usage. You can select the brake system based on the actual operation conditions.
3. When using an external brake unit, set the brake voltage class of the brake unit properly by referring to the manual of the dynamic brake unit. If the voltage class is set incorrectly, the VFD may not run properly.
| • Never use a brake resistor with a resistance below the minimum value specified for the particular drive. The drive and the internal chopper are not able to handle the overcurrent caused by the low resistance. |
| • Increase the power of the braking resistor properly in the frequent braking situation (the frequency usage ratio is more than 10%). |
D.8.1.3 AC 3PH 380V(-15%)–440V(+10%)
The VFDs of 660V need external braking units. Please select the braking resistor according to actual operation (such as the brake torque and brake usage requirements).
Model | Model of braking unit | Brake resistor value matched with 100% brake torque (Ω) | Dissipation power of brake resistor (kW) (10% brake) | Dissipated power of brake resistor (kW) (50% brake) | Dissipated power of brake resistor (kW) (80% brake) | Min allowed brake resistor (Ω) |
GD300-022G-6 | DBU100H-110-6 | 55 | 4 | 17 | 27 | 10.0 |
GD300-030G-6 | 40.3 | 5 | 23 | 36 | ||
GD300-037G-6 | 32.7 | 6 | 28 | 44 | ||
GD300-045G-6 | 26.9 | 7 | 34 | 54 | ||
GD300-055G-6 | 22.0 | 8 | 41 | 66 | ||
GD300-075G-6 | 16.1 | 11 | 56 | 90 | ||
GD300-090G-6 | 13.4 | 14 | 68 | 108 | ||
GD300-110G-6 | 11.0 | 17 | 83 | 132 | ||
GD300-132G-6 | DBU100H-160-6 | 9.2 | 20 | 99 | 158 | 6.9 |
GD300-160G-6 | 7.6 | 24 | 120 | 192 | ||
GD300-185G-6 | DBU100H-220-6 | 6.5 | 28 | 139 | 222 | 5.0 |
GD300-200G-6 | 6.1 | 30 | 150 | 240 | ||
GD300-220G-6 | 5.5 | 33 | 165 | 264 | ||
GD300-250G-6 | DBU100H-320-6 | 4.8 | 38 | 188 | 300 | 3.4 |
GD300-280G-6 | 4.3 | 42 | 210 | 336 | ||
GD300-315G-6 | 3.8 | 47 | 236 | 378 | ||
GD300-350G-6 | 3.5 | 53 | 263 | 420 | ||
GD300-400G-6 | DBU100H-400-6 | 3.0 | 60 | 300 | 480 | 2.8 |
GD300-500G-6 | Two DBU100H-320-6 | 4.8×2 | 38×2 | 188×2 | 300×2 | 3.4×2 |
GD300-560G-6 | 4.3×2 | 42×2 | 210×2 | 336×2 | ||
GD300-630G-6 | 3.8×2 | 47×2 | 236×2 | 378×2 |
Note:
1. Select brake resistors according to the resistance and power data provided by our company.
2. The brake resistor may increase the brake torque of the VFD. The preceding table describes the resistance and power for 100% brake torque, 10% brake usage, 50% brake usage, and 80% brake usage. You can select the brake system based on the actual operation conditions.
3. When using an external brake unit, set the brake voltage class of the brake unit properly by referring to the manual of the dynamic brake unit. If the voltage class is set incorrectly, the VFD may not run properly.
| • Never use a brake resistor with a resistance below the minimum value specified for the particular drive. The drive and the internal chopper are not able to handle the overcurrent caused by the low resistance. |
| • Increase the power of the braking resistor properly in the frequent braking situation (the frequency usage ratio is more than 10%). |
D.8.2 Selecting the brake resistor cables
Brake resistor cables need to be shielded cables.
D.8.3 Placing the brake resistor
All resistors need to be installed in places with good cooling conditions.
| • The materials near the brake resistor or brake unit must be non-flammable. The surface temperature of the resistor is high. Air flowing from the resistor is of hundreds of degrees Celsius. Prevent any materials from coming into contact with the resistor. |
Installation of the braking resistor:
| • The VFDs of 380V (≤30kW) only need external braking resistors. • PB and (+) are the wiring terminals of the braking resistors. |
Installation of braking units:
| • The VFDs of 380V (≥37kW) need external braking units. • The VFDs of 660V need external braking units. • (+), (-) are the wiring terminals of the braking units. • The wiring length between the (+),(-) terminals of the VFD and the (+),(-) terminals of the braking units should be no more than 5m,and the distributing length among BR1 and BR2 and the braking resistor terminals should be no more than 10m. |
Signal installation is as below:
