Danfoss VLT AutomationDrive FC 300 Series Service Guide

7 Drive and Motor Applications
80
7.1 Torque Limit, Current Limit, and Unstable Motor Operation
80
7.1.1 Overvoltage Trips 81
7.1.2 Mains Phase Loss Trips 81
7.1.3 Control Logic Problems 82
7.1.4 Programming Problems 82
7.1.5 Motor Load Problems 82
7.2 Internal Drive Problems
83
7.2.1 Overtemperature Faults 83
7.2.2 Current Sensor Faults 83
7.3 Electromagnetic Compatibility
83
7.3.1 Eects of EMI 83
7.3.2 EMI Signal and Power Wiring 84
7.3.3 Sources of EMI 84
7.3.4 EMI Propagation 84
7.3.5 Preventive Measures 87
8 Test Procedures
89
8.1 Introduction
89
8.2 Tools Required
90
8.2.1 Special Test Equipment 90
8.2.2 Signal Test Board 90
8.2.3 Metering Tools 91
8.3 Test Preparations
91
8.3.1 Preparations for Parallel Drive Systems 92
8.3.2 Access to Testing Connection Points 92
8.3.3 Card Connectors 93
8.3.4 Power Card in D-sized Drives 94
8.3.5 Power Card in E-sized Drives 95
8.3.6 MDCIC in Parallel Drive Systems 96
8.3.7 Fan Power Card in E-sized Drives 97
8.3.8 Gate Drive Card in D-sized Drives 98
8.3.9 Gate Drive Card in E-sized Drives 99
8.4 Static Test Procedures
100
8.4.1 Rectier Circuits Test 100
8.4.2 Inverter Section Tests 101
8.4.3 Brake IGBT Test 101
8.4.4 Intermediate Section Tests 102
8.4.5 IGBT Temperature Sensor Test 102
8.4.6 Gate Resistor Test 103
Contents Service Guide
MG94A502 Danfoss A/S © 02/2019 All rights reserved. 3

Danfoss VLT AutomationDrive FC 300 Series Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 300 Series
Category	DC Drives
Language	English