3.2.16 EMC Compliance
Electromagnetic interference (EMI) and radio frequency interference (RFI) are disturbances that can affect an electrical circuit due to
electromagnetic induction or radiation from an external source. The drive is designed to comply with the EMC product standard for
drives IEC/EN 61800-3. Motor cables must be shielded and properly terminated to comply with the emission levels in EN 61800-3. For
more information regarding EMC performance, see chapter EMC Test Results.
3.2.17 Galvanic Isolation of Control Terminals
All control terminals and output relay terminals are galvanically isolated from mains power, which completely protects the controller
circuitry from the input current. The output relay terminals require their own grounding. This isolation meets the stringent protective
extra low voltage (PELV) requirements for isolation.
The components that make up the galvanic isolation are:
l Supply, including signal isolation.
l Gate drive for the IGBTs, trigger transformers, and optocouplers.
l The output current Hall effect transducers.
3.3 Custom Application Features
3.3.1 Introduction
Custom application functions are the most common features programmed in the drive for enhanced system performance. They require
minimum programming or setup. See the programming guide for instructions on activating these functions.
3.3.2 Automatic Motor Adaptation
Automatic motor adaptation (AMA) is an automated test procedure used to measure the electrical characteristics of the motor. AMA
provides an accurate electronic model of the motor, allowing the drive to calculate optimal performance and efficiency. Running the
AMA procedure also maximizes the automatic energy optimization feature of the drive. AMA is performed without the motor rotating
and without uncoupling the load from the motor.
3.3.3 Process PID Controller
The built-in proportional, integral, derivative (PID) controller eliminates the need for auxiliary control devices. The PID controller
maintains constant control of closed-loop systems where regulated pressure, flow, temperature, or other system requirements must be
maintained.
3.3.4 Motor Thermal Protection
To protect the application from serious damage, the drive offers several dedicated features.
Torque limit
The torque limit protects the motor from being overloaded independent of the speed. Torque limit is controlled in parameter 4-16
Torque Limit Motor Mode and parameter 4-17 Torque Limit Generator Mode. Parameter 14-25 Trip Delay at Torque Limit controls the
time before the torque limit warning trips.
Current limit
Parameter 4-18 Current Limit controls the current limit, and parameter 14-24 Trip Delay at Current Limit controls the time before the
current limit warning trips.
Minimum speed limit
Parameter 4-12 Motor Speed Low Limit [Hz] sets the minimum output speed that the drive can provide.
18 | Danfoss A/S © 2024.01 AJ435824192086en-000101 / 130R1295
Design Guide | VLT® AutomationDrive FC 360
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