Danfoss VACON 20 X AC Drives User Guide
THE TECHNICAL DATA OF THE VACON® 20 X AC DRIVE
| Technical item or function | Technical data | |
| Mains connection | Input voltage Uin | 3AC 208…240V1AC 208…240V3AC 380…480V |
| Input voltage tolerance | -15%…+10% continuously | |
| Input frequency | 50/60 Hz | |
| Input frequency tolerance | 45…66 Hz | |
| Protection class | I | |
| Connection to mains | Once per minute or less | |
| Starting delay | 4 s | |
| Supply network | IT and TN-networks(cannot be used with corner earthed networks) | |
| Short-circuit current | Maximum short-circuit current has to be <50kA | |
| DC connection | Available as standard inMU2 single-phase frames and MU3 | |
| Motor connection | Output voltage | 3AC 0…Uin |
| Rated output current | IN: Ambient temperature max. +40°C | |
| Overload output current | 1.5 x IN (1 min/10 min) | |
| Starting current | IS for 2 s every 20 s (IS = 2.0 * IN) | |
| Output frequency | 0…320 Hz | |
| Frequency resolution | 0.01 Hz | |
| Protection class | I | |
| Motor characteristics | AC squirrel cage motors Permanent magnet motors | |
| Cable type | Screened motor cable | |
| Cable maximum length | 30 m | |
| Control characteristics | Switching frequency | Programmable 2…16 kHz; Default 6 kHz. Automatic switching frequency derating in case of overheating |
| Frequency reference: Analogue input Panel reference | Resolution ±0.05% (11-bit),accuracy ±1% Resolution 0.01 Hz | |
| Field weakening point | 8…320 Hz | |
| Acceleration time | 0.1…3000 sec | |
| Deceleration time | 0.1…3000 sec | |
| Braking | Brake chopper standard in all three-phase frames. External brake resistor optional. | |
CABLE AND FUSE SIZES, NORTH AMERICA
The recommended fuse types are class T (UL & CSA). The fuse voltage rating should be selected according to the supply network. The final selection should be made according to local regulations, cable installation conditions and cable specifications. Bigger fuses than those recommended below shall not be used.
Check that the fuse operating time is less than 0.4 seconds. Operating time depends on used fuse type and impedance of the supply circuit. Consult the factory about faster fuses. VACON® also recommends for high speed J (UL & CSA) fuse ranges.
UL STANDARDS ON CABLING
To obey the UL (Underwriters Laboratories) regulations, use a UL-approved Class 1 copper wire with a minimum heat resistance of +158 or +167 °F (+70 or +75°C).
You can use the drive on a circuit that gives a maximum of 50 000 rms symmetrical amperes, and a maximum of 500 V AC, when the drive is protected by Class T and J fuses.
The dimensions of the cables must agree with the requirements of the UL508C.
- The cables must be PVC-isolated.
- The maximum ambient temperature is +104 °F (+40°C).
- The maximum temperature of the cable surface is +158 or +167 °F (+70 or +75°C).
- Use only cables with a concentric copper shield.
- The maximum number of parallel cables is 9.
When you use parallel cables, make sure that you obey the requirements of the cross-sectional area and the maximum number of cables.
For important information on the requirements of the grounding conductor, see the UL508C.
For the correction factors for each temperature, see the instructions of the UL508C.
THE CABLE AND FUSE SIZES FOR VACON® 20 X IN NORTH AMERICA, MAINS VOLTAGE 208-240 V AND 380-500 V
Frame | Type | IL [A] | Fuse (class T) [A] | Mains and motor cable Cu | Terminal cable sizeMain terminal Earth terminal | |
| MU2 | 0004 20003 4 – 0004 4 | 4.33.2 – 4.0 | 6 | AWG14 | AWG24-AWG12 | AWG17-AWG10 |
| 0005 2 – 0007 20005 4 – 0006 4 | 6.8 – 8.45.6 – 7.3 | 10 | AWG14 | AWG24-AWG12 | AWG17-AWG10 | |
| 0008 4 | 9.6 | 15 | AWG14 | AWG24-AWG12 | AWG17-AWG10 | |
| MU21-phase | 0004 2 | 8.3 | 20 | AWG14 | AWG24-AWG12 | AWG17-AWG10 |
| 0005 2 | 11.2 | 20 | AWG14 | AWG24-AWG12 | AWG17-AWG10 | |
| 0007 2 | 14.1 | 25 | AWG14 | AWG24-AWG12 | AWG17-AWG10 | |
| MU3 | 0011 20009 4 | 13.411.5 | 15 | AWG14 | AWG20-AWG6 | AWG17-AWG10 |
| 0012 20012 4 | 14.214.9 | 20 | AWG12 | AWG20-AWG6 | AWG17-AWG10 | |
| 0017 20016 4 | 20.620.0 | 25 | AWG10 | AWG20-AWG6 | AWG17-AWG10 | |
THE TIGHTENING TORQUES OF CABLE TERMINALS
| Frame | Type | Tightening torque Power and motor terminals[Nm] lb-in. | Tightening torque EMC grounding clamps[Nm] lb-in. | Tightening torque Grounding terminals[Nm] lb-in. | |||
| MU2 | 0003 4—0008 40004 2—0007 2 | 0.5—0.6 | 4.5—5.3 | 1.5 | 13.3 | 2.0 | 17.7 |
| MU3 | 0009 4—0016 40011 2—0017 2 | 1.2—1.5 | 10.6—13.3 | 1.5 | 13.3 | 2.0 | 17.7 |
CABLE ENTRIES, MU2 AND MU3 INSTALLATIONS
TIGHTENING TORQUE OF NPT ADAPTERS TO METRIC THREADS CABLE ENTRIES
| Frame | Thread male metric | Thread male NPT | Tightening torque[Nm] lb-in. | |
| MU2 | M20 | 1/2” | 2.0 | 17.7 |
| M25 | 3/4” | 4.0 | 35.5 | |
| MU3 | M25 | 3/4” | 4.0 | 35.5 |
NPT adapter order information
M20: ADEC M20-T12
M25: ADEM M25-T34
Download and read VACON® 20 X Installation Manual, wall-mounted drives at:
http://drives.danfoss.com/knowledge-center/ technical-documentation/
Documents / Resources
 | Danfoss VACON 20 X AC Drives [pdf] User Guide VACON 20 X AC Drives, 20 X AC Drives, AC Drives |
 | Danfoss VACON 20 X AC Drives [pdf] User Guide MU2, MU3, VACON 20 X AC Drives, 20 X AC Drives, AC Drives |
