Page 3 - Table of contents
Table of contents Table of contents 3 Safety Information 5 Hazard categories 5 Qualification of personnel 6 Intended use 6 Basic information 7 DC bus voltage measurement 9 Standards and terminology 9 About the book 11 1 Introduction 13 1.1 Permissible device types for common DC bus 14 2 Technical Da...
Page 5 - Hazard categories; will result; WARNING; can result; can result; NOTICE; can result; Safety Information
Safety Information Read these instructions carefully, and look at the equipment tobecome familiar with the device before trying to install, operate, ormaintain it. The following special messages may appear throughoutthis documentation or on the equipment to warn of potential hazardsor to call attent...
Page 6 - Common DC bus
Qualification of personnel Only appropriately trained persons who are familiar with and under-stand the contents of this manual and all other pertinent product docu-mentation are authorized to work on and with this product. In addition,these persons must have received safety training to recognize an...
Page 7 - HAZARD DUE TO ELECTRIC SHOCK, EXPLOSION OR ARC FLASH; Wait 15 minutes
Basic information DANGER HAZARD DUE TO ELECTRIC SHOCK, EXPLOSION OR ARC FLASH • Only appropriately trained persons who are familiar with and understand the contents of this manual and all other pertinentproduct documentation and who have received safety training torecognize and avoid hazards involve...
Page 8 - LOSS OF CONTROL; • The designer of any control scheme must consider the potential
WARNING LOSS OF CONTROL • The designer of any control scheme must consider the potential failure modes of control paths and, for certain critical functions,provide a means to achieve a safe state during and after a pathfailure. Examples of critical control functions are emergency stop,overtravel sto...
Page 9 - ELECTRIC SHOCK, EXPLOSION OR ARC FLASH; Standards and terminology
DC bus voltage measurement The DC bus voltage can exceed 800 Vdc. The DC bus LED is not anindicator of the absence of DC bus voltage. DANGER ELECTRIC SHOCK, EXPLOSION OR ARC FLASH • Disconnect the voltage supply to all connections.• Wait 15 minutes to allow the DC bus capacitors to discharge.• Use a...
Page 11 - Special prerequisites for the following work steps; About the book
About the book This document describes how several Schneider Electric drives typeLXM32 can share a common DC bus.This application note replaces application note MNA01D001. The information provided in this document supplements the manuals.Before beginning, fully read and understand the manuals of the...
Page 13 - Use of electrical energy; Introduction
1 Introduction A drive system requires energy for acceleration or constant movementthat must be supplied to the system. During deceleration, a motor acts as a generator. A considerable por-tion of the kinetic energy is re-generated as electrical energy. Since electrical energy can only be stored to ...
Page 14 - Permissible device types for common DC bus
1.1 Permissible device types for common DC bus The DC bus of drives with identical numbers of mains phases can beconnected. Single-phase drives: • LXM32 ∙∙∙∙ M2 with LXM32 ∙∙∙∙ M2 Three-phase drives: • LXM32 ∙∙∙∙ N4 with LXM32 ∙∙∙∙ N4 1 Introduction LXM32 14 Common DC bus MNA01M001EN, V1.01, 08.2014
Page 15 - Firmware version; Drive; Technical Data
2 Technical Data 2.1 Firmware version A common DC bus requires the devices to have at least the specifiedfirmware versions: Drive Firmware version LXM32C, LXM32A V01.04.00 LXM32M V01.02.00 LXM32 2 Technical Data Common DC bus 15 MNA01M001EN, V1.01, 08.2014
Page 16 - DC bus data
2.2 DC bus data Single-phase drives LXM32 ∙ ... U45M2 U90M2 D18M2 D30M2 Nominal voltage (1 ∼ ) V 115 230 115 230 115 230 115 230 Nominal voltage DC bus V 163 325 163 325 163 325 163 325 Undervoltage limit V 55 130 55 130 55 130 55 130 Voltage limit: activation of Quick Stop V 60 140 60 140 60 140 60...
Page 17 - Braking resistor; Parameter
2.3 Braking resistor LXM32 drives have an internal braking resistor and a connection foran external braking resistor. If the internal braking resistor is insuffi-cient for the dynamics of the application, one or more external brakingresistors must be connected. Single-phase drives LXM32 ∙ ... U45M2 ...
Page 20 - Cables for the DC bus; Minimum requirement
2.4 Cables for the DC bus Minimum requirement A cable for the common DC bus must meet the following require-ments. Shield: Shielded at cable lengths of > 0.2 m Twisted Pair: Twisted pair at cable lengths of > 0.2 m Cable: Two wires, shielded Maximum cable length between 2 drives: 3 m Special c...
Page 21 - DESTRUCTION OF SYSTEM COMPONENTS AND LOSS OF CONTROL; Verify that all requirements for using the DC bus are met.; DESTRUCTION OF SYSTEM COMPONENTS; Engineering
3 Engineering This chapter provides engineering information for a common DC busfor several drives. Incorrect use of the DC bus may permanently damage the driveseither immediately or over time. WARNING DESTRUCTION OF SYSTEM COMPONENTS AND LOSS OF CONTROL Verify that all requirements for using the DC ...
Page 22 - Energy balance; Energy balance basics; Energy absorption of the capaci-; Electrical losses E; Braking resistor E
3.1 Energy balance To be able to estimate the effect of an interconnection of drives via acommon DC bus, create an energy balance of the individual drivesover a movement cycle. A movement cycle typically consists of the fol-lowing phases: acceleration, continuous movement and deceleration. The energ...
Page 23 - Rating
Rating v I t t D i Figure 1: Movement cycle: Profile for energy assessment This profile with velocity (v) and motor current (I) is also used for ratingthe motor and the braking resistor. The deceleration segment to beconsidered is labeled D i . Calculation of the energy at constant deceleration: The...
Page 24 - Cycletime; in Ws and cycle time T in s; DC bus connection; Cable specifications
P c = Σ E Di Cycletime Units: P c in W, E Di in Ws and cycle time T in s These calculations allow you to select the required braking resistor. 3.2 Electromagnetic compatibility (EMC) If drives are to be operated via a common DC bus, the followingaspects must be considered in terms of EMC: • Keep DC ...
Page 25 - Fuses; See manual of the respective product for more information.; DC bus connection of single-phase drives; Single mains fuse
3.4 Fuses The number of mains fuses depends on the input current of all drivesconnected via the common DC bus. Choose fuse ratings as low as possible according to the power of thedrive as well as the conductor cross section. See manual of the respective product for more information. The maximum perm...
Page 26 - Multiple mains fuses
Multiple mains fuses Multiple mains fuses are required if the total input current of all drivesconnected via the common DC bus exceeds the maximum fuse ratingshown in the table below. Multiple mains fuses Maximum fuse rating LXM32 ∙∙∙∙ M2 A 25 If multiple mains fuses are required, additional DC bus ...
Page 27 - DC bus connection of three-phase drives
3.4.2 DC bus connection of three-phase drives Single mains fuse A single fuse is sufficient if the total input current of all drives connec-ted via the common DC bus is less than the maximum fuse ratingshown in the table below. Single mains fuse Maximum fuse rating LXM32 ∙ U60N4, LXM32 ∙ D12N4, LXM3...
Page 29 - Supply via the DC bus; A single or multiple drives can be supplied directly via the DC bus.; DC bus fuses
3.4.3 Supply via the DC bus A single or multiple drives can be supplied directly via the DC bus. The supply is provided by a correspondingly sized drive or by a DCpower supply unit. In the case of supply via the DC bus, DC bus fuses must be used. TheDC bus fuses must be suitable for 600 Vdc. The num...
Page 30 - Single DC bus fuse
Single DC bus fuse If the total maximum continuous current on the DC bus of all drivesconnected via the common DC bus does not exceed the maximumfuse rating of a drive, a single DC bus fuse is sufficient. L3 L2 L1 L2 L1 L3 PC/- PA/+ PC/- PA/+ PC/- PA/+ PC/- PA/+ L2 L1 L3 L2 L1 L3 L2 L1 L3 Figure 6: ...
Page 31 - Multiple DC bus fuses
Multiple DC bus fuses If the total maximum continuous current on the DC bus of all drivesconnected via the common DC bus exceeds the maximum fuse ratingof a drive, DC bus fuses are required at each drive. L2 L1 L3 L2 L1 L3 L2 L1 L3 L3 L2 L1 L2 L1 L3 PC/- PA/+ PC/- PA/+ PC/- PA/+ PC/- PA/+ Figure 8: ...
Page 32 - Braking resistors; Rating the braking resistor; MOTOR WITHOUT BRAKING EFFECT; • Verify that the I; HOT SURFACES; vicinity of the braking resistor.
3.5 Braking resistors Excess energy in the common DC bus must be absorbed by the brak-ing resistors. Depending on the application, one or more braking resis-tors can be connected. Consider the internal braking resistors ofLXM32 drives in your calculations. If drives with a different nominal power ar...
Page 33 - Internal braking resistor; Pmax; R = Resistance value in; = Required peak power in W
Further information on the subject Page Technical data chapter "2.3 Braking resistor" 17 Commissioning chapter "5.2 LXM32: Setting the braking resistor parameters" 54 See also chapter "3.1 Energy balance", page 22 for rating information. Internal braking resistor A braking re...
Page 34 - Connection of braking resistor; Rating information; Energy absorption braking resistor; Example: LXM32 drive
Use only resistors that are specified as braking resistors. See chapter"2.3 Braking resistor", page 17 for suitable braking resistors. Connection of braking resistor Braking resistors with degree of protection IP65 may be installed out-side the control cabinet in an appropriate environment i...
Page 35 - Selecting an external braking
• Initial speed of rotation: n = 4000 min -1 • Rotor inertia: J R = 4 kgcm 2 • Load inertia: J L = 6 kgcm 2 Calculation of the energy to be absorbed: E B = 1/2 * J * (2* π *n * 1/60) 2 to 88 Ws Electrical and mechanical losses are ignored. In this example, the DC bus capacitors absorb 23 Ws (the val...
Page 36 - Mains reactor; greater than specified for the drives.
3.6 Mains reactor A mains reactor is required if at least one of the following criteria ismet: • The output power of the drive is to be increased.• The short-circuit current rating (SCCR) of the supplying mains is greater than specified for the drives. • Current harmonics are to be reduced. If one d...
Page 38 - Mains filter
3.7 Mains filter The emission depends on the length of the motor cables. If therequired limit value is not reached with the internal mains filter, youmust use an external mains filter. See manual of the respective product for information on mains filters. The mains filter for several drives with a c...
Page 39 - Mains reactor and external mains filter
3.8 Mains reactor and external mains filter If a mains reactor and an external mains filter are required, the mainsreactor and external mains filter must be arranged according to thefollowing illustrations for EMC reasons. PC/- PA/+ PC/- PA/+ PC/- PA/+ DC+DC - L3 L2 L1 L2 L1 L3 L2 L1 L3 S2S3 S1 E3 E...
Page 41 - DESTRUCTION DUE TO INCORRECT OPERATION; Installation
4 Installation An engineering phase is mandatory prior to mechanical and electricalinstallation. See chapter "3 EngineeringInstallation", page 21, for basicinformation. Incorrect use of the DC bus may permanently damage the driveseither immediately or over time. WARNING DESTRUCTION OF SYSTEM...
Page 42 - Assembling cables; Properties of the DC bus cable
L1 N/L2 L1 N/L2 M2 M2 L1 L3 L2 L1 L3 L2 N4 N4 L1 L3 L2 N L1 L3 L2 N M2 M2 L1 L3 L2 N L1 L3 L2 N N4 M2 Figure 14: Specifications for drives with mains supply 4.1 Assembling cables Pre-assembled cables are available for common DC bus. If the pre-assembled cables do not have the required length, use ca...
Page 43 - Part
4 3 A 1 2 5 C B PC/- PA/+ PC/- PA/+ Part Length in mm (inches) A Cable jacket 130 (5.2) B Length of shield connection 60 (2.5) C Stripping length 6 (0.25) Diameter ring-type cable lug / fork-type cable lug For M5 screw ▶ (1) Strip the cable jacket, length A. ▶ (2) Slide back the shield braiding. Ope...
Page 44 - Slide the shield braiding back over the cable jacket.
The following instructions apply to drives with screw terminals for theDC bus. 3 A B 1 2 C LXM32 ∙ ... D85, C10 A mm (in) 220 (8.66) B mm (in) 50 (1.97) C mm (in) 18 (0.71) (1) Strip the cable jacket, length A. (2) Slide the shield braiding back over the cable jacket. (3) Secure the shield braiding ...
Page 45 - Wiring the DC bus; EQUIPMENT DAMAGE CAUSED BY INCORRECT POLARITY; Verify correct polarity during installation.; Drives with connectors; Connector coding; Connector lock
4.2 Wiring the DC bus NOTICE EQUIPMENT DAMAGE CAUSED BY INCORRECT POLARITY Verify correct polarity during installation. Failure to follow these instructions can result in equipmentdamage. The DC bus is connected by means of a plug and socket connectionor screw terminals. Cable specifications See cha...
Page 47 - Drives with terminals; This chapter describes LXM32 drives with screw terminals.; Connecting the DC bus
4.2.2 Drives with terminals This chapter describes LXM32 drives with screw terminals. Properties of the connection termi- nals CN9 LXM32 ∙ ... D85, C10 Connection cross section mm 2 (AWG) 6 ... 25 (10 ... 4) Tightening torque for terminal screws Nm (lb.in) 3.8 (33.6) Stripping length mm (in) 18 (0.7...
Page 49 - Verifying installation; Verify that the connector locks are properly snapped in.
4.3 Verifying installation ▶ Verify that the wiring complies with the specifications as per chap-ter "3 EngineeringInstallation". ▶ Verify that the fuses used do not exceed the maximum permissiblefuse rating. ▶ Verify that PA/+ is only connected to PA/+ and that PC/- is onlyconnected to PC/-...
Page 51 - Commissioning
5 Commissioning For commissioning, follow the commissioning instructions for the indi-vidual devices in the manual of the respective product. Incorrect use of the DC bus may permanently damage the driveseither immediately or over time. WARNING DESTRUCTION OF SYSTEM COMPONENTS AND LOSS OF CONTROL Ver...
Page 52 - Commissioning procedure; DC bus connection LXM32 to LXM32; Switch on the controller supply for all devices.
5.1 Commissioning procedure 5.1.1 DC bus connection LXM32 to LXM32 Commissioning steps: ▶ Verify proper installation of the drives and the connections for thecommon DC bus, see chapter "4.3 Verifying installation", page 49. ▶ Switch on the controller supply for all devices. ▶ Set the paramet...
Page 53 - Parameters
5.1.2 Supply via the DC bus Commissioning steps: ▶ Verify proper installation of the drives and the connections for thecommon DC bus, see chapter "4.3 Verifying installation", page 49. ▶ Switch on the controller supply for all devices. ▶ LXM32: Set the parameter MON_MainsVolt to "DC-Bus ...
Page 55 - DC bus accessories; Description; The following DC fuses are offered by SIBA.; Description; Accessories and spare parts
6 Accessories and spare parts 6.1 DC bus accessories Description Order no. DC bus connection cable, 2 * 6 mm 2 (2 * AWG 10), pre-assembled, 0.1 m, 5 pieces VW3M7101R01 DC bus connection cable, 2 * 6 mm 2 (2 * AWG 10), Twisted Pair, shielded, 15 m VW3M7102R150 DC bus connector kit, connector housing ...
Page 56 - External braking resistors
6.3 External braking resistors Description Order no. Braking resistor IP65; 10 Ω ; maximum continuous power 400 W; 0.75 m connection cable (2.1 mm 2 ), UL VW3A7601R07 Braking resistor IP65; 10 Ω ; maximum continuous power 400 W; 2 m connection cable (2.1 mm 2 ), UL VW3A7601R20 Braking resistor IP65;...
Page 57 - Units and conversion tables; Length; Glossary
Glossary Units and conversion tables The value in the specified unit (left column) is calculated for thedesired unit (top row) with the formula (in the field). Example: conversion of 5 meters (m) to yards (yd)5 m / 0.9144 = 5.468 yd Length in ft yd m cm mm in - / 12 / 36 * 0.0254 * 2.54 * 25.4 ft * ...
Page 59 - Terms and Abbreviations
Terms and Abbreviations See chapter " Standards and terminology" for information on the perti-nent standards on which many terms are based. Some terms andabbreviations may have specific meanings with regard to the stand-ards. AC Alternating current DC Direct current DC bus Circuit that suppl...
Page 61 - Table of figures
Table of figures 1) Movement cycle: Profile for energy assessment 23 2) Single mains fuse for single-phase drives 25 3) Multiple mains fuses for single-phase drives 26 4) Single mains fuse for three-phase drives 27 5) Multiple mains fuses for three-phase drives 28 6) Supply via the DC bus by a drive...
Page 63 - Index
Index A Abbreviations 59 Accessories External braking resistor, data 19 Accessories and spare parts 55 B Braking resistor 17 External 19 Monitoring 33 Rating 32 Selection 33 Braking resistors common DC bus 32 C Commissioning 51 Parameters for braking resistor 54 steps 52 Common DC bus Braking resist...
