Siemens MICROMASTER 420 Reference Manual

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MICROMASTER 420 Reference Manual
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1.1 Purpose of this Manual..............................................................................................2
1.2 Compatibilty...............................................................................................................2
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2.1 Current Limit and Overload Operation ......................................................................8
2.2 Fast Current Limit......................................................................................................9
2.3 Positive Temperature Coefficient Resistor Use.......................................................10
2.4 I
2
t Performance........................................................................................................10
2.5 Internal Overtemperature ........................................................................................10
2.6 Overvoltage and Trip Levels....................................................................................11
2.7 Boost........................................................................................................................11
2.8 Proportional and Integral Control (PI)......................................................................12
2.9 Braking.....................................................................................................................20
2.10 Derating Factors......................................................................................................22
2.11 Cubicle Calculations ................................................................................................26
2.12 Thermal Protection and Automatic De-rating ..........................................................26
2.13 Operation from Unearthed Supplies........................................................................27
2.14 Multi-Motor Connection ...........................................................................................27
2.15 Control Modes (P1300) ...........................................................................................27
2.16 Working with Binary Connectors (BiCo) ..................................................................28
2.17 Acoustic Noise.........................................................................................................35
2.18 Harmonic Currents ..................................................................................................36
2.19 Power Losses ..........................................................................................................38

Siemens MICROMASTER 420 Specifications

General

Power Range	0.12 kW to 11 kW
Output Voltage	0 to input voltage
Input Frequency	47 Hz to 63 Hz
Output Frequency	0 Hz to 650 Hz
Overload Capacity	150% for 60 seconds
Enclosure Rating	IP20
Input Voltage	200 V to 240 V (±10%), 380 V to 480 V (±10%)
Control Type	V/f control
Braking	Optional braking module
Protection Features	Overcurrent, overvoltage, undervoltage, overload, short circuit, ground fault
Cooling	Air-cooled
Ambient Temperature	-10 °C to +50 °C
Communication Interfaces	USS protocol