Siemens SINAMICS V20 User Manual

Electrical installation
4.3 Using several single-phase converters in machines and plants
SINAMICS V20 Converter
Operating Instructions, 10/2019, A5E34559884-012
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4.3 Using several single-phase converters in machines and plants
Overview
Evaluate the input currents of single-phase converters in your machine or plant in terms of
harmonics and unbalance.
Description
In unfavorable cases, the harmonic currents of several converters in the neutral conductor
(N) add up to a value greater than the currents of the line conductors (L1, L2, L3). The
current carrying capacity of the neutral conductor must be sufficient for this. IEC 60364-5-
52:2019, section 524, makes recommendations for sizing the neutral conductor. If no more
precise information is available, the standard recommends dimensioning the neutral
conductor for 1.45 times the current carrying capacity of the line conductors.
CAUTION
Fire caused by neutral conductor (N) overload
The neutral conductor can heat up due to the load from harmonic currents and cause a fire.
• Consider the harmonic currents when dimensioning the neutral conductor.
WARNING
Electric shock caused by PEN conductor overload
In TN-C supply networks, the protective function of the PEN conductor can be adversely
affected by exposure to harmonic currents.
• Consider the harmonic currents when dimensioning the PEN conductor.

Siemens SINAMICS V20 Specifications

General

Power Range	0.12 kW to 30 kW
Overload Capacity	150% for 60 seconds
Protection Class	IP20
Storage Temperature Range	-40°C to +70°C
Altitude	Up to 1000 m without derating
Input Voltage	3AC 380 V to 480 V
Output Voltage	0 V to Input Voltage
Control Modes	V/f control
Ambient Temperature Range	-10°C to +60°C
Relative Humidity	5% to 95%, non-condensing
Communication Interfaces	Modbus RTU
Braking Resistor	Optional external