Schneider Electric MNA01M001EN

Multiple mains fuses Multiple mains fuses are required if the total input current of all drives

connected via the common DC bus exceeds the maximum fuse rating

shown in the table below.

Multiple mains fuses Maximum fuse rating

LXM32∙∙∙∙M2 A 25

If multiple mains fuses are required, additional DC bus fuses must be

used upstream of each drive. The DC bus fuses must be suitable for

600 Vdc.

DC bus fuses Maximum fuse rating

LXM32∙∙∙∙M2 A 25

N/L2L1

N/L2

N/L2L1N/L2L1

PC/-PA/+ PC/-PA/+ PC/-PA/+

DC+

DC-

Figure 3: Multiple mains fuses for single-phase drives

See chapter "6.2 DC fuses" for fuses for the DC bus.

The use of mains reactors can reduce the input current. Due to the

lower input current, it may be possible to operate the drives with just a

single mains fuse.

3 Engineering LXM32

26 Common DC bus

MNA01M001EN, V1.01, 08.2014

Contents

Main LXM32 Table of contents LXM32 Table of contents Table of contents LXM32 Safety Information Hazard categories DANGER WARNING CAUTION Qualification of personnel Intended use Safety Information LXM32 Basic information DANGER Safety Information LXM32 DC bus voltage measurement DANGER Standards and terminology Page About the book LXM32 About the book Page 1 Introduction LXM32 1 Introduction 1.1 Permissible device types for common DC bus 1 Introduction LXM32 2 Technical Data 2.1 Firmware version 2.2 DC bus data Single-phase drives Three-phase drives 16 Common DC bus 2.3 Braking resistor Common DC bus 17 Three-phase drives 18 Common DC bus 2.3.1 External braking resistors (accessories) Common DC bus 19 2.4 Cables for the DC bus 3 Engineering 3.1 Energy balance 3.1.1 Energy balance basics v D I t 3.2 Electromagnetic compatibility (EMC) 3.4 Fuses 3.4.1 DC bus connection of single-phase drives Page 3.4.2 DC bus connection of three-phase drives Page 3.4.3 Supply via the DC bus Page ~ 3.5 Braking resistors 3.5.1 Rating the braking resistor WARNING 3 Engineering LXM32 Page 3.5.2 Rating information Page 3.6 Mains reactor See the manual of the respective product for information on mains reactors. Common DC bus 37 3.7 Mains filter 3.8 Mains reactor and external mains filter Common DC bus 39 Page 4 Installation Figure 14: Specifications for drives with mains supply 4.1 Assembling cables 42 Common DC bus Page Page 4.2 Wiring the DC bus 4.2.1 Drives with connectors Page 4.2.2 Drives with terminals CN9 4.2.3 Connecting the DC bus 4.3 Verifying installation Page 5 Commissioning LXM32 5 Commissioning 5.1 Commissioning procedure 5.1.1 DC bus connection LXM32 to LXM32 5 Commissioning LXM32 5.1.2 Supply via the DC bus LXM32 5 Commissioning 5.2 LXM32: Setting the braking resistor parameters WARNING 5 Commissioning LXM32 6 Accessories and spare parts 6.1 DC bus accessories 6.2 DC fuses LXM32 6 Accessories and spare parts 6.3 External braking resistors 6 Accessories and spare parts LXM32 Glossary Units and conversion tables Length Mass Force Glossary LXM32 Terms and Abbreviations LXM32 Glossary Page Table of figures LXM32 Table of figures Page Index LXM32 Index Index LXM32