2Introduction
The MCD 500 is an advanced digital soft start solution for motors from 7 kW to 800 kW. MCD 500 soft starters provide a complete range of motor and
system protection features and have been designed for reliable performance in the most demanding installation situations.
2.1.1 Feature List
Models for all connection requirements
• 21 A to 1600 A (in-line connection)
• In-line or inside delta connection
• Internally bypassed up to 215 A
• Mains voltage: 200 - 525 VAC or 380 - 690 VAC
• Control voltage: 24 VAC/VDC, 110 - 120 VAC or 220 - 240 VAC
User-friendly LCP
• Loggings
•Real-time graphs
•SCR conduction bar graph
Tools
• Application setups
• Date and time stamped event log with 99 entries
•8 most recent trips
• Counters
•Protection simulation
• Output signal simulation
Inputs and Outputs
• Local or remote control input options
(3 x fixed 1 x programmable)
• Relay outputs (3 x programmable)
• Analog programmable output
• 24 VDC 200 mA supply output
Start and run modes
• AAC - Adaptive Acceleration Control
• Constant current
• Current ramp
•Kickstart
•Jog
• Emergency run operation
Stop modes
• AAC - Adaptive Acceleration Control
• Timed voltage ramp soft stop
•DC brake
•Soft brake
•Emergency stop
Other features
• Auto start/stop timer
• Second order thermal model
• Battery backup of clock and thermal model
• Optional DeviceNet, Modbus or Profibus communication mod-
ules
Comprehensive protection
• Wiring/Connection/Supply
- Motor connection
- Phase sequence
- Power loss
- Individual phase loss
- Mains frequency
• Current
- Excess start time
- Current imbalance
- Undercurrent
- Instantaneous overcurrent
•Thermal
- Motor thermistor
- Motor overload
- Bypass relay overload
- Heatsink temperature
• Communication
- Network comms
- Starter comms
•External
- Input trip
•Starter
- Individual shorted SCR
- Battery/Clock
MCD 500 Operating Instruction 2 Introduction
MG.17.K2.02 - VLT
®
is a registered Danfoss trademark
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