Table 13: Maximum wiring sizes for the motor compressor power supply cables
Voltage range
From network to frequency converter
From frequency converter to compressor
Type
mm²
AWG
Type
mm²
AWG
380 V
CDC100-30kW
22
4
VCH115-G
22
4
NOTE:
The wire size values are the maximum size the converter can accept. The required cable size should be
specified
by
the OEM depending on the unit design, ambient temperature, the wire material, current, etc...
Electrical
specifications
Supply voltage
Table 14: Mains voltage range of drive
Voltage code
Mains voltage range of drive
G
380 (±10%)/ 3ph/ 50Hz
Never connect the VCH115 compressor directly to the mains power supply in case of frequency converter
defect.
Drive voltage imbalance
The maximum allowable voltage imbalance between each phase is 3%. Voltage imbalance causes high amperage
over one or several phases, which in turn leads to overheating and possible drive damage.
Fuses / circuit breakers
The CDC100 frequency converter generates by design a compressor soft start.
Current inrush will not exceed the frequency converter maximum current.
Basically seen from the mains, the inrush peak reaches a level which is only a few percent more than the rated
nominal current.
Drive installation
Installation environment requirements
• Ambient temperature in the range of -30°C~ 70°C, > 55 °C derating.
• Drive should be installed on surface of
flame
retardant object, with adequate surrounding space for heat
dissipation.
• Installation should be performed where vibration is less than 2g.
• Avoid from moisture and direct sunlight.
• Do not expose to an atmosphere with
flammable
gases, corrosive gases, explosive gases or other harmful gases.
• Protect the cooling fan by avoiding oil, dust and metal particles.
• Prevent drilling residues, wire ends and screws falling into drive.
Drive ambient temperature
CDC100 drive can operate at 55˚C with maximum load; between 55 ˚C and 70 ˚C with 80% maximum load. Do
not exceed the maximum temperature limit.
The drive could operate lower to -30˚C with proper operation, such as inside the cabinet, install the space heater.
LCP operating temperature is -10 - 50 ˚C.
High Ambient Temperature
Test at the units at highest ambient maximum load is recommended. Look for over temperature alarms. Guidelines
that support high ambient temperature:
© Danfoss | Climate Solutions | 2023.08
AB392939083370en-000202 | 23
Scroll compressors, VCH115 | Frequency converter
