ATV32, LXM32 Common DC bus for ATV32, LXM32 Application note

Transcription

1 ATV32, LXM32 Common DC bus for ATV32, LXM32 Application note

2 Important information ATV32, LXM32 Important information This document is part of the product. Carefully read this document and observe all instructions. Keep this document for future reference. Hand this document and all other pertinent product documentation over to all users of the product. Carefully read and observe all safety instructions and the chapter "Before you begin - safety information". Some products are not available in all countries. Please consult the latest catalog for information on the availability of products. Subject to technical modifications without notice. All details provided are technical data which do not constitute warranted qualities. Most of the product designations are registered trademarks of their respective owners, even if this is not explicitly indicated. 2 Common DC bus for ATV32, LXM32

3 ATV32, LXM32 Table of contents Table of contents Important information Table of contents About this manual Introduction Before you begin - safety information Qualification of personnel Intended use Hazard categories Basic information DC bus voltage measurement Standards and terminology Technical Data Firmware version Drive data Permissible device types for common DC bus ATV32: DC bus data LXM32: DC bus data Fuses Mains fuse Fuse for DC bus Cables for DC bus Braking resistor External braking resistors (accessories) Mains filter Mains reactors Engineering EMC specifics Mounting distances Energy balance Energy absorption Prerequisites for a common DC bus Common DC bus for ATV32, LXM32 3

4 Table of contents ATV32, LXM Structure of a common DC bus Common mains fuses Separate mains fuses DC supply via a drive DC supply via DC power supply unit Accessories for the common DC bus Braking resistors Mains reactor External mains filter Mains reactor and external mains filter Cables for DC bus Installation Cables for DC bus Wiring the DC bus Connecting the DC bus Checking installation Commissioning Commissioning procedure LXM32: Setting the braking resistor parameters Accessories and spare parts DC bus accessories DC fuses External braking resistors Glossary Units and conversion tables Length Mass Force Power Rotation Torque Moment of inertia Temperature Conductor cross section Terms and Abbreviations Index Common DC bus for ATV32, LXM32

5 ATV32, LXM32 About this manual About this manual Source manuals Corrections and suggestions Work steps Making work easier This document describes how several Schneider Electric drives types ATV32 and LXM32 can share a common DC bus. This application note replaces application note MNA01D001. The information provided in this document supplements the manuals. Before beginning, carefully read the manuals of products used. The latest versions of the manuals can be downloaded from the Internet at: We always try to further optimize our manuals. We welcome your suggestions and corrections. Please get in touch with us by techcomm@schneider-electric.com. If work steps must be performed consecutively, this sequence of steps is represented as follows: Special prerequisites for the following work steps Step 1 Specific response to this work step Step 2 If a response to a work step is indicated, this allows you to verify that the work step has been performed correctly. Unless otherwise stated, the individual steps must be performed in the specified sequence. Information on making work easier is highlighted by this symbol: Sections highlighted this way provide supplementary information on making work easier. SI units Glossary Index SI units are the original values. Converted units are shown in brackets behind the original value; they may be rounded. Example: Minimum conductor cross section: 1.5 mm 2 (AWG 14) Explanations of special technical terms and abbreviations. List of keywords with references to the corresponding page numbers. Common DC bus for ATV32, LXM32 5

6 About this manual ATV32, LXM32 6 Common DC bus for ATV32, LXM32

7 ATV32, LXM32 1 Introduction 1 Introduction 1 Use of electrical energy Drives supporting the use of a common DC bus A drive system requires energy for acceleration or constant movement that must be supplied to the system. During deceleration, a motor acts as a generator. A considerable portion of the kinetic energy is re-generated as electrical energy. Since electrical energy can only be stored to a limited extent in a single drive, a drive uses a braking resistor to transform the excess energy into thermal energy. If an application uses several drive systems, the regenerated energy can be used to accelerate other motors. The regenerated power can be used efficiently during anti-cyclical operation, i.e. one motor decelerates while another motor accelerates at the same time. The energy can be exchanged when the DC buses of the drives are connected. The following drives can be operated via a common DC bus: Single-phase drives with single-phase drives ATV32 M2 with ATV32 M2 ATV32 M2 with LXM32 M2 LXM32 M2 with LXM32 M2 Three-phase drives with three-phase drives ATV32 N4 with ATV32 N4 LXM32 N4 with LXM32 N4 ATV32 N4 with LXM32 N4 It is not permissible to operate single-phase drives in combination with three-phase drives. Common DC bus for ATV32, LXM32 7

8 1 Introduction ATV32, LXM32 8 Common DC bus for ATV32, LXM32

9 ATV32, LXM32 2 Before you begin - safety information 2 Before you begin - safety information 2 The information provided in this document supplements the manuals. Before beginning, carefully read the manuals of products used. 2.1 Qualification of personnel Only appropriately trained persons who are familiar with and understand the contents of this manual and all other pertinent product documentation are authorized to work on and with this product. In addition, these persons must have received safety training to recognize and avoid hazards involved. These persons must have sufficient technical training, knowledge and experience and be able to foresee and detect potential hazards that may be caused by using the product, by changing the settings and by the mechanical, electrical and electronic equipment of the entire system in which the product is used. All persons working on and with the product must be fully familiar with all applicable standards, directives, and accident prevention regulations when performing such work. 2.2 Intended use The functions described in this document are only intended for use for the products described in this document. The product may only be used in compliance with all applicable safety regulations and directives, the specified requirements and the technical data. Prior to using the product, you must perform a risk assessment in view of the planned application. Based on the results, the appropriate safety measures must be implemented. Since the product is used as a component in an entire system, you must ensure the safety of persons by means of the design of this entire system (for example, machine design). Operate the product only with the specified cables and accessories. Use only genuine accessories and spare parts. The product must NEVER be operated in explosive atmospheres (hazardous locations, Ex areas). Any use other than the use explicitly permitted is prohibited and can result in hazards. Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel. Common DC bus for ATV32, LXM32 9

10 2 Before you begin - safety information ATV32, LXM Hazard categories Safety instructions to the user are highlighted by safety alert symbols in the manual. In addition, labels with symbols and/or instructions are attached to the product that alert you to potential hazards. Depending on the seriousness of the hazard, the safety instructions are divided into 4 hazard DANGER DANGER indicates an imminently hazardous situation, which, if not avoided, will result in death or serious WARNING WARNING indicates a potentially hazardous situation, which, if not avoided, can result in death, serious injury, or equipment CAUTION CAUTION indicates a potentially hazardous situation, which, if not avoided, can result in injury or equipment damage. CAUTION CAUTION used without the safety alert symbol, is used to address practices not related to personal injury (e.g. can result in equipment damage). 10 Common DC bus for ATV32, LXM32

11 ATV32, LXM32 2 Before you begin - safety information 2.4 Basic DANGER HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH Only appropriately trained persons who are familiar with and understand the contents of this manual and all other pertinent product documentation and who have received safety training to recognize and avoid hazards involved are authorized to work on and with this drive system. Installation, adjustment, repair and maintenance must be performed by qualified personnel. The system integrator is responsible for compliance with all local and national electrical code requirements as well as all other applicable regulations with respect to grounding of all equipment. Many components of the product, including the printed circuit board, operate with mains voltage. Do not touch. Only use electrically insulated tools. Do not touch unshielded components or terminals with voltage present. The motor generates voltage when the shaft is rotated. Prior to performing any type of work on the drive system, block the motor shaft to prevent rotation. AC voltage can couple voltage to unused conductors in the motor cable. Insulate both ends of unused conductors in the motor cable. Do not short across the DC bus terminals or the DC bus capacitors. Before performing work on the drive system: Disconnect all power, including external control power that may be present. Place a "DO NOT TURN ON" label on all power switches. Lock all power switches in the open position. Wait 15 minutes to allow the DC bus capacitors to discharge. Measure the voltage on the DC bus as per chapter "DC bus voltage measurement" and verify the voltage is < 42 V dc. The DC bus LED is not an indicator of the absence of DC bus voltage. Install and close all covers before applying voltage. Failure to follow these instructions will result in death or serious injury. Common DC bus for ATV32, LXM32 11

12 2 Before you begin - safety information ATV32, LXM32 LOSS OF WARNING 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 path failure. Examples of critical control functions are emergency stop, overtravel stop, power outage and restart. Separate or redundant control paths must be provided for critical functions. System control paths may include communication links. Consideration must be given to the implication of unanticipated transmission delays or failures of the link. Observe all accident prevention regulations and local safety guidelines. 1) Each implementation of the product must be individually and thoroughly tested for proper operation before being placed into service. Failure to follow these instructions can result in death or serious injury. 1) For USA: Additional information, refer to NEMA ICS 1.1 (latest edition), Safety Guidelines for the Application, Installation, and Maintenance of Solid State Control and to NEMA ICS 7.1 (latest edition), Safety Standards for Construction and Guide for Selection, Installation and Operation of Adjustable-Speed Drive Systems. 12 Common DC bus for ATV32, LXM32

13 ATV32, LXM32 2 Before you begin - safety information 2.5 DC bus voltage measurement Disconnect all power prior to starting work on the DANGER HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH Only appropriately trained persons who are familiar with and understand the safety instructions in the chapter "Before you begin - safety information" may perform the measurement. Failure to follow these instructions will result in death or serious injury. The DC bus voltage can exceed 800 V dc. Use a properly rated voltagesensing device for measuring. Procedure: Disconnect the voltage supply to all connections. Wait 15 minutes to allow the DC bus capacitors to discharge. Measure the DC bus voltage between the DC bus terminals to verify that the voltage is < 42 V dc. If the DC bus capacitors do not discharge properly, contact your local Schneider Electric representative. Do not repair or operate the product. The DC bus LED is not an indicator of the absence of DC bus voltage. 2.6 Standards and terminology Technical terms, terminology and the corresponding descriptions in this manual are intended to use the terms or definitions of the pertinent standards. In the area of drive systems, this includes, but is not limited to, terms such as "safety function", "safe state", "fault", "fault reset", "failure", "error", "error message", "warning", "warning message", etc. Among others, these standards include: IEC series: "Adjustable speed electrical power drive systems" IEC series: "Industrial communication networks - Fieldbus specifications" IEC series: "Industrial communication networks - Profiles" IEC series: "Functional safety of electrical/electronic/programmable electronic safety-related systems" Also see the glossary at the end of this manual. Common DC bus for ATV32, LXM32 13

14 2 Before you begin - safety information ATV32, LXM32 14 Common DC bus for ATV32, LXM32

15 ATV32, LXM32 3 Technical Data 3 Technical Data Firmware version A common DC bus with ATV32 and LXM32 drives requires the devices to have at least the specified firmware versions: Device type Firmware version ATV32 V1.3 LXM32A, LXM32C V LXM32M V Drive data Permissible device types for common DC bus The following single-phase drives can be operated via a common DC bus: ATV32H0 M2 ATV32HU M2 LXM32 U M2 LXM32 D M2 ATV32H018M2 ATV32HU11M2 LXM32 U45M2 LXM32 D18M2 ATV32H037M2 ATV32HU15M2 LXM32 U90M2 LXM32 D30M2 ATV32H055M2 ATV32HU22M2 ATV32H075M2 Table 3.1 Single-phase drives The following three-phase drives can be operated via a common DC bus: ATV32H0 N4 ATV32HU N4 ATV32HD N4 LXM32 U N4 LXM32 D N4 ATV32H037N4 ATV32HU11N4 ATV32HD11N4 LXM32 U60N4 LXM32 D12N4 ATV32H055N4 ATV32HU15N4 ATV32HD15N4 LXM32 D18N4 ATV32H075N4 ATV32HU22N4 LXM32 D30N4 ATV32HU30N4 LXM32 D72N4 ATV32HU40N4 ATV32HU55N4 ATV32HU75N4 Table 3.2 Three-phase drives Common DC bus for ATV32, LXM32 15

16 3 Technical Data ATV32, LXM ATV32: DC bus data Single-phase ATV32 drives ATV32H... (1 ) 018M2 037M2 055M2 075M2 Nominal voltage (1 ) [V ac ] Nominal voltage DC bus [V] Undervoltage limit [V] Overvoltage limit [V] Maximum continuous power via DC bus [kw] Maximum continuous current via DC bus [A] ATV32H... (1 ) 018M2 037M2 055M2 075M2 Capacitance of internal capacitor [μf] External braking resistor minimum [Ω] Parameter dccc [DC-Bus compat.] = NO (default value) 1) Switch-on voltage braking resistor [V] Energy absorption of internal capacitors [Ws] E var at nominal voltage 200 V Energy absorption of internal capacitors E var at nominal voltage 240 V [Ws] ) Parameter dccc [DC-Bus compat.] has no effect in the case of single-phase ATV32 drives Table 3.3 Data for single-phase drives ATV32H0 ATV32H... (1 ) U11M2 U15M2 U22M2 Nominal voltage (1 ) [V ac ] Nominal voltage DC bus [V] Undervoltage limit [V] Overvoltage limit [V] Maximum continuous power via DC bus [kw] Maximum continuous current via DC bus [A] Common DC bus for ATV32, LXM32

17 ATV32, LXM32 3 Technical Data ATV32H... (1 ) U11M2 U15M2 U22M2 Capacitance of internal capacitor [μf] External braking resistor minimum [Ω] Parameter dccc [DC-Bus compat.] = NO (default value) 1) Switch-on voltage braking resistor [V] Energy absorption of internal capacitors [Ws] E var at nominal voltage 200 V Energy absorption of internal capacitors E var at nominal voltage 240 V [Ws] ) Parameter dccc [DC-Bus compat.] has no effect in the case of single-phase ATV32 drives Three-phase ATV32 drives Table 3.4 Data for single-phase drives ATV32HU ATV32H... (3 ) 037N4 055N4 075N4 U11N4 U15N4 Nominal voltage (3 ) [V ac ] Nominal voltage DC bus [V] Undervoltage limit [V] Overvoltage limit [V] Maximum continuous power via DC bus [kw] Maximum continuous current via DC bus [A] Common DC bus for ATV32, LXM32 17

18 3 Technical Data ATV32, LXM32 ATV32H... (3 ) 037N4 055N4 075N4 U11N4 U15N4 Capacitance of internal capacitor [μf] External braking resistor minimum [Ω] Parameter dccc [DC-Bus compat.] = NO (default value) Switch-on voltage braking resistor [V] Energy absorption of internal capacitors [Ws] E var at nominal voltage 380[V] Energy absorption of internal capacitors E var at nominal voltage 500 V [Ws] Parameter dccc [DC-Bus compat.] = Main or dccc [DC-Bus compat.] = bus (reduced switch-on voltage) Switch-on voltage braking resistor [V] Energy absorption of internal capacitors [Ws] E var at nominal voltage 380 V Energy absorption of internal capacitors E var at nominal voltage 500 V [Ws] Table 3.5 Data for three-phase drives ATV32H0/ATV32HU ATV32H... (3 ) U22N4 U30N4 U40N4 U55N4 U75N4 Nominal voltage (3 ) [V ac ] Nominal voltage DC bus [V] Undervoltage limit [V] Overvoltage limit [V] Maximum continuous power via DC bus [kw] Maximum continuous current via DC bus [A] Common DC bus for ATV32, LXM32

19 ATV32, LXM32 3 Technical Data ATV32H... (3 ) U22N4 U30N4 U40N4 U55N4 U75N4 Capacitance of internal capacitor [μf] External braking resistor minimum [Ω] ParameterdCCC [DC-Bus compat.] = NO (default value) Switch-on voltage braking resistor [V] Energy absorption of internal capacitors [Ws] E var at nominal voltage 380 V Energy absorption of internal capacitors E var at nominal voltage 500 V [Ws] Parameter dccc [DC-Bus compat.] = Main or dccc [DC-Bus compat.] = bus (reduced switch-on voltage) Switch-on voltage braking resistor [V] Energy absorption of internal capacitors [Ws] E var at nominal voltage 380 V Energy absorption of internal capacitors E var at nominal voltage 500 V [Ws] Table 3.6 Data for three-phase drives ATV32HU ATV32H... (3 ) D11N4 D15N4 Nominal voltage (3 ) [V ac ] Nominal voltage DC bus [V] Undervoltage limit [V] Overvoltage limit [V] Maximum continuous power via DC bus [kw] Maximum continuous current via DC bus [A] Common DC bus for ATV32, LXM32 19

20 3 Technical Data ATV32, LXM32 ATV32H... (3 ) D11N4 D15N4 Capacitance of internal capacitor [μf] External braking resistor minimum [Ω] ParameterdCCC [DC-Bus compat.] = NO (default value) Switch-on voltage braking resistor [V] Energy absorption of internal capacitors [Ws] E var at nominal voltage 380 V Energy absorption of internal capacitors E var at nominal voltage 500 V [Ws] Parameter dccc [DC-Bus compat.] = Main or dccc [DC-Bus compat.] = bus (reduced switch-on voltage) Switch-on voltage braking resistor [V] Energy absorption of internal capacitors [Ws] E var at nominal voltage 380 V Energy absorption of internal capacitors E var at nominal voltage 500 V [Ws] Table 3.7 Data for three-phase drives ATV32HD 20 Common DC bus for ATV32, LXM32

21 ATV32, LXM32 3 Technical Data LXM32: DC bus data Single-phase LXM32 drives LXM32... (1 ) U45M2 U90M2 D18M2 D30M2 Nominal voltage (1 ) [V ac ] Nominal voltage DC bus [V] Undervoltage limit [V] Voltage limit: Start of Quick Stop [V] Overvoltage limit [V] Maximum continuous power via DC bus [kw] Maximum continuous current via DC bus [A] LXM32... (1 ) U45M2 U90M2 D18M2 D30M2 Capacitance of internal capacitor [μf] Resistance value of internal braking resistor [Ω] Continuous power internal braking resistor [W] P PR Peak energy E CR [Ws] External braking resistor minimum [Ω] External braking resistor maximum 1) [Ω] Maximum continuous power external braking resistor [W] ParameterDCbus_compat =0 (default value) Switch-on voltage braking resistor [V] Energy absorption of internal capacitors [Ws] E var at nominal voltage 115 V +10% Energy absorption of internal capacitors [Ws] E var at nominal voltage 200 V +10% Energy absorption of internal capacitors E var at nominal voltage 230 V +10% [Ws] ParameterDCbus_compat =1 (reduced switch-on voltage) Switch-on voltage braking resistor [V] Energy absorption of internal capacitors [Ws] E var at nominal voltage 115 V +10% Energy absorption of internal capacitors [Ws] E var at nominal voltage 200 V +10% Energy absorption of internal capacitors E var at nominal voltage 230 V +10% [Ws] ) The maximum specified braking resistor can derate the peak power of the device. Depending on the application, it is possible to use a higher ohm resistor. Table 3.8 Data for single-phase drives LXM32 Common DC bus for ATV32, LXM32 21

22 3 Technical Data ATV32, LXM32 Three-phase LXM32 drives LXM32... (3 ) U60N4 D12N4 D18N4 D30N4 D72N4 Nominal voltage (3 ) 1) [V ac ] Nominal voltage DC bus [V] Undervoltage limit [V] Voltage limit: Start of Quick Stop [V] Overvoltage limit [V] Maximum continuous power via DC bus [kw] Maximum continuous current via DC bus [A] ) LXM32A, LXM32C: 208V ac (3*200V ac... 3*240V ac ) DOM > , firmware version V LXM32M: 208V ac (3*200V ac... 3*240V ac ) DOM > , firmware version V LXM32... (3 ) U60N4 D12N4 D18N4 D30N4 D72N4 Nominal voltage (3 ) [V ac ] Nominal voltage DC bus [V] Undervoltage limit [V] Voltage limit: Start of Quick Stop [V] Overvoltage limit [V] Maximum continuous power via DC bus [kw] Maximum continuous current via DC bus [A] Common DC bus for ATV32, LXM32

23 ATV32, LXM32 3 Technical Data LXM32... (3 ) U60N4 D12N4 D18N4 D30N4 D72N4 Capacitance of internal capacitor [μf] Resistance value of internal braking resistor [Ω] Continuous power internal braking resistor [W] P PR Peak energy E CR [Ws] External braking resistor minimum [Ω] External braking resistor maximum 1) [Ω] Maximum continuous power external braking resistor [W] Parameter DCbus_compat 2) Switch-on voltage braking resistor [V] Energy absorption internal capacitors E var [Ws] at nominal voltage 208 V +10% 3) Energy absorption of internal capacitors [Ws] E var at nominal voltage 380 V +10% Energy absorption of internal capacitors [Ws] E var at nominal voltage 400 V +10% Energy absorption of internal capacitors E var at nominal voltage 480 V +10% [Ws] ) The maximum specified braking resistor can derate the peak power of the device. Depending on the application, it is possible to use a higher ohm resistor. 2) Parameter DCbus_compat has no effect in the case of three-phase LXM32 drives. 3) LXM32A, LXM32C: 208V ac (3*200V ac... 3*240V ac ) DOM > , firmware version V LXM32M: 208V ac (3*200V ac... 3*240V ac ) DOM > , firmware version V Table 3.9 Data for three-phase drives LXM32 Common DC bus for ATV32, LXM32 23

24 3 Technical Data ATV32, LXM Fuses Mains fuse Maximum permissible fuse ratings for mains fuses A common DC bus for several drives can be implemented in different ways, see chapter 4 "Engineering". Depending on the application you need mains fuses and DC bus fuses. The fuse ratings depend on the power of the drives and the conductor cross section. See manual of the respective product for more information. The maximum permissible fuse ratings must not be exceeded. Fuses for single-phase drives Maximum fuse ratings for single-phase drives: Single-phase drives 1) Maximum fuse rating ATV32 M2 [A] 25 LXM32 M2 [A] 25 1) Only use the drives listed in chapter 3.2 "Drive data". Fuses for three-phase drives Maximum fuse rating for three-phase drives: Three-phase drives 1) Maximum fuse rating ATV32H0 N4 [A] 32 ATV32HU N4 [A] 32 ATV32HD N4 [A] 32 LXM32 N4 [A] 32 1) Values only for the types listed in chapter 3.2 "Drive data" Fuse for DC bus Example Use suitable fuses for the common DC bus. See chapter 3.2 "Drive data" for information on the DC bus voltage and the maximum continuous current via the DC bus. See chapter 7.2 "DC fuses", page 65 for fuses for the DC bus. Choose fuse ratings as low as possible according to the power of the drive as well as the conductor cross section. The maximum permissible fuse ratings must not be exceeded. A drive has a maximum continuous current of 6A via the DC bus. 10A fuses are used as DC bus fuses for this drive.. 24 Common DC bus for ATV32, LXM32

25 ATV32, LXM32 3 Technical Data Maximum permissible fuse ratings for DC bus fuses DC bus: Fuse for single-phase drives DC bus: Fuse for three-phase drives Maximum fuse rating of the fuses for the DC bus for single-phase drives: Single-phase drives 1) Maximum fuse rating ATV32 M2 [A] 25 LXM32 M2 [A] 25 1) Values only for the types listed in chapter 3.2 "Drive data" Maximum fuse rating of the fuses for the DC bus for three-phase drives: Three-phase drives 1) Maximum fuse rating ATV32H0 N4 [A] 32 ATV32HU N4 [A] 32 ATV32HD N4 [A] 32 LXM32 N4 [A] 32 1) Values only for the types listed in chapter 3.2 "Drive data" Common DC bus for ATV32, LXM32 25

26 3 Technical Data ATV32, LXM Cables for DC bus Minimum requirements for a common DC bus cable A cable for the common DC bus must meet the following requirements. 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 of a DC bus 3m connection cable Special features: Insulation must be rated for the DC bus voltage Conductor cross section according to the calculated current, but at least 2* 6 mm 2 (2* AWG 10) Table 3.10 Required properties of the DC bus cables Properties of the DC bus cable VW3M7102R150 NOTE: The connection of the fuses for the DC bus must be rated for the total DC bus current of all drives. Analyze the most critical case (for example EMERGENCY STOP) and select an appropriate conductor cross section. Shield: Shielded Twisted Pair: Twisted pair Cable: 2* 6 mm 2 (2* AWG 10) Table 3.11 Properties of the cablevw3m7102r150 Crimp contact VW3M2207 Crimp contact Connection cross section [mm 2 ] (AWG12... AWG10) Table 3.12 Properties of the crimp contact 26 Common DC bus for ATV32, LXM32

27 ATV32, LXM32 3 Technical Data 3.5 Braking resistor ATV32 LXM32 The resistance values for external braking resistors must not be below the minimum resistance specified for the drives. ATV32 drives have an internal braking resistor. One or more external braking resistors must be connected, depending on the dynamics of the application. LXM32 drives have an internal braking resistor. If the internal braking resistor is insufficient for the dynamics of the application, one or more external braking resistors must be connected External braking resistors (accessories) VW3A Rxx 1) 2Rxx 3Rxx 4Rxx 1) 5Rxx 6Rxx 7Rxx 1) Resistance [Ω] Continuous power [W] Maximum time in braking at 115 V / [s] V Peak power at 115 V / 230 V [kw] Maximum peak energy at 115 V / 230 V [Ws] Maximum time in braking at 400 V [s] Peak power at 400 V [kw] Maximum peak energy at 400 V [Ws] Degree of protection IP65 IP65 IP65 IP65 IP65 IP65 IP65 UL approval (file no.) E E E E ) Resistors with a continuous power of 400 W are NOT UL/CSA-approved. VW3A Resistance [Ω] Continuous power [W] Maximum time in braking at 115 V / [s] V Peak power at 115 V / 230 V [kw] Maximum peak energy at 115 V / 230 V [Ws] Maximum time in braking at 400 V [s] Peak power at 400 V [kw] Maximum peak energy at 400 V [Ws] Degree of protection IP20 IP20 IP20 IP20 IP20 UL approval (file no.) E E E E E Common DC bus for ATV32, LXM32 27

28 3 Technical Data ATV32, LXM Mains filter The fuse rating upstream of the common external mains filter must not be greater than the nominal current of the external mains filter. NOTE: Three-phase mains filters do not have a neutral conductor connection; they are only approved for three-phase devices. See the manual of the respective product for information on external mains filters. 3.7 Mains reactors If one drive requires a mains reactor, then all drives connected via the DC bus must be equipped with mains reactors. The fuse rating upstream of the common mains reactor must not be greater than the nominal current of the mains reactor. See the manual of the respective product for information on mains reactors. 28 Common DC bus for ATV32, LXM32

29 ATV32, LXM32 4 Engineering 4 Engineering 4 This chapter provides engineering information for a common DC bus for several drives. ATV32: See the "Altivar 32 - Installation manual" for vital engineering information concerning the ATV32 drive. LXM32: See the Engineering chapter in the LXM32 product manual for vital engineering information concerning the LXM32 WARNING DESTRUCTION OF SYSTEM COMPONENTS AND LOSS OF CONTROL Incorrect use of a parallel connection of the DC bus may destroy the drives immediately or after a delay. Note the requirements concerning the use of a parallel DC bus connection. Failure to follow these instructions can result in death, serious injury or equipment damage. Page 4.1 "EMC specifics" "Mounting distances" "Energy balance" "Prerequisites for a common DC bus" "Structure of a common DC bus" "Common mains fuses" "Separate mains fuses" "DC supply via a drive" "DC supply via DC power supply unit" 4.6 "Accessories for the common DC bus" EMC specifics If drives are to be operated via a common DC bus, the following aspects must be considered in terms of EMC: Keep DC bus cables as short as possible. Shielded DC bus cables must be used at a cable length of > 0.2 m. In the case of shielded DC bus cables, connect the cable shield to the shield connection (large surface area contact). Common DC bus for ATV32, LXM32 29

30 4 Engineering ATV32, LXM Mounting distances When planning mounting distances, consider the space required for the DC bus cables. 4.3 Energy balance To be able to estimate the effect of a planned interconnection of drives, you should create an energy balance of the individual drives over a movement cycle. A movement cycle consists of the following phases: acceleration, continuous movement and deceleration. The energy generated during deceleration can be used by other drives connected via a common DC bus. Excess energy must be absorbed by the braking resistors. 30 Common DC bus for ATV32, LXM32

31 ATV32, LXM32 4 Engineering Energy absorption Energy absorption is influenced by the following factors: DC bus capacitors E var in the drive Electrical losses of the drive system E el Mechanical losses of the facility and the drive system E mech Braking resistor E B The energy E var is the square difference between the voltage prior to deceleration and the response threshold. The energy absorption through the DC bus capacitors is lowest when the voltage is highest. In the calculation, use the values of the highest mains voltage. Electrical losses E el Mechanical losses E mech Braking resistor The electrical losses E el of the drive system can be estimated on the basis of the peak power of the drive. The maximum power dissipation is approximately 10% of the peak power at a typical efficiency of 90%. If the current during deceleration is lower, the power dissipation is reduced accordingly. The mechanical losses result from friction during operation of the system. Mechanical losses are negligible if the time required by the system to coast to a stop without a driving force is considerably longer than the time required to decelerate the system. The mechanical losses can be calculated from the load torque and the velocity from which the motor is to stop. Two characteristic values determine the energy absorption of a braking resistor. The continuous power P PR is the amount of energy that can be continuously absorbed without overloading the braking resistor. The maximum energy E CR limits the maximum short-term power that can be absorbed. Common DC bus for ATV32, LXM32 31

32 4 Engineering ATV32, LXM32 Rating D i v t I t Figure 4.1 Movement cycle: Profile for energy assessment This profile with velocity (v) and motor phase current (I) is also used for rating the motor and the braking resistor. The deceleration segment to be considered is labeled D i. Calculation of the energy at constant deceleration: The total inertia (J t ) must be known. J t with: J t = J m + J c J m : Motor inertia with or without holding brake J c : Load inertia The energy for each deceleration segment is calculated as follows: E i = 1 2 J t ω i 2 = 1 2 J t 2πn i 2 60 Units: E i in Ws (wattseconds), J t in kgm 2, ω in rad and n i in min -1. See the technical data for the energy absorption E var of the devices (without consideration of an internal or external braking resistor). 32 Common DC bus for ATV32, LXM32

33 ATV32, LXM32 4 Engineering In the next calculation steps, only consider those segments D i, whose energy E i exceeds the energy absorption of the device (see chapter 3.2 "Drive data"). These excess energies E Di must be diverted by means of the braking resistor (internal or external). E Di is calculated using the following formula: E Di = E i - E var (in Ws) The continuous power P c is calculated for each machine cycle: 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. 4.4 Prerequisites for a common DC bus You may only connect Schneider Electric drives types ATV32 and LXM32; see chapter "Permissible device types for common DC bus", page 15. The following conditions must be satisfied: Only drives with identical nominal voltages may be connected via a common DC bus. Only drives with the same number of phases may be connected via a common DC bus. Only connect three-phase drives and threephase drives or single-phase drives and single-phase drives via a common DC bus. Single-phase drives must be connected to the same mains phase. Use only DC bus cables that comply with the specification listed in chapter 3.4 "Cables for DC bus", page 26. Common DC bus for ATV32, LXM32 33

34 4 Engineering ATV32, LXM Structure of a common DC bus Common mains fuses The structure of a common DC bus can differ according the requirements. See the concepts below: Common mains fuse Separate mains fuses DC supply via a drive DC supply via DC power supply unit Conditions All drives are connected to the mains supply via common mains fuses. For DC bus connections for drives with common mains fuses the following conditions must be met: All drives have common mains fuses. Single-phase drives M2 Maximum input current of all connected drives: 25 A. Three-phase drives N4 Maximum input current of all connected drives: 32 A. The current of all drives supplied via the DC bus must not exceed the maximum values listed in the following table, even when regeneration conditions are present. If the following maximum values are exceeded DC fuses must be used. Single-phase drives M2 Three-phase drives N4 Maximum DC bus current: 25 A. Maximum DC bus current: 32 A. Only drives with an identical number of phases may be connected via a common DC bus. Only connect three-phase drives and threephase drives or single-phase drives and single-phase drives via a common DC bus. Only drives with identical nominal voltages may be connected via a common DC bus. M2 drives: Connect single-phase drives only to the same phase. Activate mains phase monitoring for all drives. If you want to operate ATV32 and LXM32 drives via a common DC bus, you must activate the following parameters for each device: Drive ATV32 LXM32 Parameter dccc [DC-Bus compat.] DCbus_compat ATV32 : The power of the ATV32 drives sharing a common DC bus may differ by a maximum of one level in continuous power. See chapter 3.2 "Drive data" for the maximum power of the drives. ATV32 : Set the type of DC bus connection via parameter dccm [DC-Bus chaining]. Additional conditions may apply for setting this parameter, see Altivar 32 Programming manual. 34 Common DC bus for ATV32, LXM32

35 ATV32, LXM32 4 Engineering Single-phase drives Common mains fuse: ATV32 M2, LXM32 M2 L1 N/L2 N/L2 L1 N/L2 L1 N/L2 L1 PC/- PA/+ PC/- PA/+ PC/- PA/+ DC+ DC - Figure 4.2 Common mains fuse: DC bus of single-phase drives Three-phase drives Common mains fuse: ATV32 N4, LXM32 N4 L1 L2 L3 L3 L2 L1 L3 L2 L1 L3 L2 L1 PC/- PA/+ PC/- PA/+ PC/- PA/+ DC+ DC - Figure 4.3 Common mains fuse: DC bus of three-phase drives Common DC bus for ATV32, LXM32 35

36 4 Engineering ATV32, LXM Separate mains fuses Conditions Each drive is connected to the mains supply via its own mains fuses. The following conditions must be met for the DC bus connection of drives with separate mains fuses: Each individual drive requires its own mains fuses; see chapter "Mains fuse", page 24. Separate fuses for the DC bus must be used for each individual drive. See chapter "Fuse for DC bus", page 24 for permissible fuse ratings. Only drives with an identical number of phases may be connected via a common DC bus. Only connect three-phase drives and threephase drives or single-phase drives and single-phase drives via a common DC bus. Only drives with identical nominal voltages may be connected via a common DC bus. M2 drives: Connect single-phase drives only to the same phase. Activate mains phase monitoring for all drives. If you want to operate ATV32 and LXM32 drives via a common DC bus, you must activate the following parameters for each device: Drive ATV32 LXM32 Parameter dccc [DC-Bus compat.] DCbus_compat ATV32 : The power of the ATV32 drives sharing a common DC bus may differ by a maximum of one level in continuous power. See chapter 3.2 "Drive data" for the maximum power of the drives. ATV32 : Set the type of DC bus connection via parameter dccm [DC-Bus chaining]. Additional conditions may apply for setting this parameter, see Altivar 32 Programming manual. NOTE: The connection of the fuses for the DC bus must be rated for the total DC bus current of all drives. Analyze the most critical case in your application (for example EMERGENCY STOP) and select an appropriate conductor cross section. 36 Common DC bus for ATV32, LXM32

37 ATV32, LXM32 4 Engineering Single-phase drives Separate mains fuses: ATV32 M2, LXM32 M2 L1 N/L2 N/L2 L1 N/L2 L1 N/L2 L1 PC/- PA/+ PC/- PA/+ PC/- PA/+ DC+ DC - Figure 4.4 Separate mains fuses: DC bus of single-phase drives Three-phase drives Separate mains fuses: ATV32 N4, LXM32 N4 L1 L2 L3 L3 L2 L1 L3 L2 L1 L3 L2 L1 PC/- PA/+ PC/- PA/+ PC/- PA/+ DC+ DC - Figure 4.5 Separate mains fuses: DC bus of three-phase drives Common DC bus for ATV32, LXM32 37

38 4 Engineering ATV32, LXM DC supply via a drive Conditions The drives are supplied via an appropriately rated drive via the DC bus. The following conditions must be met for the DC bus connection of drives with one supplying drive: Fuses must be used for the DC bus. See chapter "Fuse for DC bus", page 24 for permissible fuse ratings. Only drives with an identical number of phases may be connected via a common DC bus. Only connect three-phase drives and threephase drives or single-phase drives and single-phase drives via a common DC bus. Only drives with identical nominal voltages may be connected via a common DC bus. In the case of LXM32 drives, set the same voltage for all drives with the parameter MON_MainsVolt. If you want to operate ATV32 and LXM32 drives via a common DC bus, you must activate the following parameters for each device: Drive ATV32 LXM32 Parameter dccc [DC-Bus compat.] DCbus_compat ATV32 : Set the type of DC bus connection via parameter dccm [DC-Bus chaining]. Additional conditions may apply for setting this parameter, see Altivar 32 Programming manual. NOTE: The connection of the fuses for the DC bus must be rated for the total DC bus current of all drives. Analyze the most critical case in your application (for example EMERGENCY STOP) and select an appropriate conductor cross section. 38 Common DC bus for ATV32, LXM32

39 ATV32, LXM32 4 Engineering DC supply via a drive Separate fuses for the DC bus must be used for each individual drive. See chapter "Fuse for DC bus", page 24 for permissible fuse ratings. L1 L2 L3 L3 L2 L1 PC/- PA/+ PC/- PA/+ PC/- PA/+ PC/- PA/+ Figure 4.6 A drive supplies additional drives via the DC bus. Separate fuses for the DC bus must be used for each individual drive. Common DC bus for ATV32, LXM32 39

40 4 Engineering ATV32, LXM32 Special case If the following additional condition is met, the fuses between the supplying drive and the supplied DC bus are sufficient: The current of all drives supplied via the DC bus does not exceed the values listed in the following table. Single-phase drives M2 Three-phase drives N4 Maximum input current of all connected drives: 25 A. Maximum input current of all connected drives: 32 A. Maximum fuse rating for DC bus fuses: 25 A. Maximum fuse rating for DC bus fuses: 32 A. Maximum DC bus current: 25 A. Maximum DC bus current: 32 A. L1 L2 L3 L3 L2 L1 PC/- PA/+ PC/- PA/+ PC/- PA/+ PC/- PA/+ Figure 4.7 A drive supplies additional drives via the DC bus. With appropriate DC bus current, fuses must only be used between the supplying drive and the supplied DC bus. 40 Common DC bus for ATV32, LXM32

41 ATV32, LXM32 4 Engineering DC supply via DC power supply unit Conditions Drives are powered via the DC bus by means of a DC bus power supply unit. The following conditions must be met for the DC bus connection of drives with a supplying DC power supply unit: Fuses must be used for the DC bus. See chapter "Fuse for DC bus", page 24 for permissible fuse ratings. Only drives with an identical number of phases may be connected via a common DC bus. Only connect three-phase drives and threephase drives or single-phase drives and single-phase drives via a common DC bus. Only drives with identical nominal voltages may be connected via a common DC bus. In the case of LXM32 drives, set the same voltage for all drives with the parameter MON_MainsVolt. The power supply unit must be selected according to drives to be supplied. If you want to operate ATV32 and LXM32 drives via a common DC bus, you must activate the following parameters for each device: Drive ATV32 LXM32 Parameter dccc [DC-Bus compat.] DCbus_compat ATV32 : Set the type of DC bus connection via parameter dccm [DC-Bus chaining]. Additional conditions may apply for setting this parameter, see Altivar 32 Programming manual. Common DC bus for ATV32, LXM32 41

42 4 Engineering ATV32, LXM32 NOTE: The connection of the fuses for the DC bus must be rated for the total DC bus current of all drives. Analyze the most critical case in your application (for example EMERGENCY STOP) and select an appropriate conductor cross section. Separate fuses for the DC bus must be used for each individual drive. See chapter "Fuse for DC bus", page 24 for permissible fuse ratings. L1 N/L2 ~ - + PC/- PA/+ PC/- PA/+ PC/- PA/+ Figure 4.8 A DC power supply unit supplies additional drives via the DC bus. Separate fuses for the DC bus must be used for each individual drive. 42 Common DC bus for ATV32, LXM32

43 ATV32, LXM32 4 Engineering 4.6 Accessories for the common DC bus Braking resistors Rating the braking resistor Excess energy in the common DC bus must be absorbed by the braking resistors. Depending on the application, one or more braking resistors can be connected. Consider the internal braking resistors of LXM32 drives in your calculations. NOTE: If ATV32 drives and LXM32 drives are connected via the DC bus, the external braking resistors must be connected to the LXM32 drive with the greatest nominal power. NOTE: If drives with a different nominal power are connected via the DC bus, you must connect braking resistors to the drive with the greatest nominal power. See the manual of the respective product for more WARNING MOTOR WITHOUT BRAKING EFFECT An insufficient braking resistor causes overvoltage on the DC bus and switches off the power stage. The motor is no longer actively decelerated. Verify that the braking resistor has a sufficient rating. Check the parameter settings for the braking resistor. Check the I 2 t value under the most critical condition by performing a test run. The device switches off at an I 2 t value of 100%. When performing the calculation and the test run, take into account the fact that the DC bus capacitors can absorb less braking energy at higher mains voltages. Failure to follow these instructions can result in death, serious injury or equipment damage. HOT WARNING The braking resistor may heat up to over 250 C (480 F) during operation. Avoid contact with the hot braking resistor. Do not allow flammable or heat-sensitive parts in the immediate vicinity of the braking resistor. Provide for good heat dissipation. Check the temperature of the braking resistor under the most critical condition by performing a test run. Failure to follow these instructions can result in death, serious injury or equipment damage. Common DC bus for ATV32, LXM32 43