The Micromaster 420; Features - Siemens Micromaster 420 Operating Instruction

International English
1.1

The MICROMASTER 420

The MICROMASTER 420s are a range of frequency inverters for controlling the speed of
three phase AC motors. The various models available range from the 120 W single phase
input to the 11 kW three phase input.
The inverters are microprocessor-controlled and use state-of-the-art Insulated Gate
BipoIar Transistor (IGBT) technology. This makes them reliable and versatile. A special
pulse-width modulation method with selectable Pulse frequency permits quiet motor
operation. Comprehensive protective functions provide excellent inverter and motor
protection.
The MICROMASTER 420 with its default factory settings, is ideal for a large range of
simple motor control applications. The MICROMASTER 420 can also be used for more
advanced motor control applications via its comprehensive parameter lists.
The MICROMASTER 420 can be used in both 'stand-alone' applications as well as being
integrated into 'Automation Systems'.
1.2

Features

Main characteristics
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Easy to install, parameterize and commission
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Fast repeatable response time to control signals
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Comprehensive range of parameters enabling configuration for widest range of
applications
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Simple cable connection
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Modular design for extremely flexible configuration
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High switching frequencies for low-noise motor operation
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External options for PC communications, Basic Operator Panel (BOP), Advanced
Operator Panel (AOP) and Profibus Communications Module
Performance characteristics
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Flux Current Control (FCC) for improved dynamic response and motor control
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Fast Current Limitation (FCL) for operation with trip-free mechanism
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Built-in DC injection brake
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Compound Braking to improve braking performance
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Acceleration/deceleration times with programmable smoothing
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Closed-loop control using Proportional, Integral (PI) control loop function
Protection characteristics
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Complete protection for motor and inverter
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Overvoltage/undervoltage protection
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Overtemperature protection for the inverter
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Ground fault protection
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Short-circuit protection
2
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I
16
t thermal motor protection
OVERVIEW
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0