Danfoss VLT CDS 803 Manual
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Danfoss VLT CDS 803 Manual

Compressor drive
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Design Guide
VLT® Compressor Drive CDS 803
6–30 kW
vlt-drives.danfoss.com

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Summary of Contents for Danfoss VLT CDS 803

  • Page 1 Design Guide VLT® Compressor Drive CDS 803 6–30 kW vlt-drives.danfoss.com...

  • Page 3: Table Of Contents

    Built-in PID Controller 3.2.2.4 Automatic Restart 3.2.2.5 Flying Start 3.2.2.6 Frequency Bypass 3.2.2.7 Motor Preheat 3.2.2.8 Programmable Set-ups 3.2.2.9 Smart Logic Control (SLC) 3.2.2.9.1 Comparators 3.2.2.9.2 Logic Rules VLT® Compressor Drive CDS 803 Protections Danfoss A/S © 2021.05 AJ330233902305en-000201/130R0596 | 3...
  • Page 4 Compressor Output (U, V, W) Control Input/Output 4.4.1 10 V DC Output 4.4.2 24 V DC Output 4.4.3 Analog Inputs 4.4.4 Analog Outputs 4.4.5 Digital Inputs 4.4.6 Digital Outputs 4.4.7 Relay Outputs, Enclosure Sizes H3–H5 4 | Danfoss A/S © 2021.05 AJ330233902305en-000201/130R0596...
  • Page 5 6.2.1 Recommendation of Fuses and Circuit Breakers Electrical Wiring 6.3.1 Wiring Schematic 6.3.2 Terminal Overview of Enclosure Sizes H3–H5 6.3.3 Terminal Overview of Enclosure Size H6 6.3.4 Connecting to Mains and Compressor Terminals Danfoss A/S © 2021.05 AJ330233902305en-000201/130R0596 | 5...
  • Page 6 6.6.2 Harmonics Test Results (Emission) Galvanic Isolation (PELV) Ground Leakage Current 6.8.1 Using a Residual Current Device (RCD) How to Order Drive Configurator Type Code Description Accessories and Spare Parts Appendix Abbreviations Conventions 6 | Danfoss A/S © 2021.05 AJ330233902305en-000201/130R0596...

  • Page 7: Introduction

    The latest software does not always contain the latest updates for the drive. Contact the local sales office for the latest drive updates (in the form of *.upd files), or download the drive updates from the Service and Support download page on www.danfoss.com.
  • Page 8 The VLT® Compressor Drive CDS 803 with SXXX in the type code is certified against UL 508C. Example: CDS803P7K5T4E20H4XXCXXXSXXXXAXBXCXXXXDX The VLT® Compressor Drive CDS 803 with S096 in the type code is certified against UL/EN/IEC 60730-1. Example: CDS803P30KT4E20H2XXXXXXS096XAXBXCXXXXDX 8 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 9: Safety

    Disconnect the drive from the mains. Press [Off/Reset] on the LCP before programming parameters. Ensure that the drive is fully wired and assembled when it is connected to AC mains, DC supply, or load sharing. Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 9...
  • Page 10 An internal failure in the drive can result in serious injury when the drive is not properly closed. Ensure that all safety covers are in place and securely fastened before applying power. 10 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 11: Product Overview

    Design Guide Product Overview 3 Product Overview 3.1 VLT® Compressor Drive CDS 803 Family Overview Danfoss offers CDS drives in different-sized enclosures with power ratings from 6.0–30 kW (8.0–40 hp). Common for all drives are the following: • I/Os 4 digital inputs (PNP or NPN)

  • Page 12: Vlt® Compressor Drive Cds 803 Features

    The compressor runs at the start speed for a defined fixed time. • If a locked rotor or flooded compressor occurs, it is detected during start-up. • If the drive fails to start the compressor, it trips on Alarm 18, Start failed. 12 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 13: Compressor Minimum Speed Detection

    In case of excessive low speed the drive issues Alarm 49, Speed limit. Speed Motor speed low limit Compressor minimum speed for trip Minimum speed detection timer start Illustration 3: Minimum Speed Detection Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 13...

  • Page 14: Short-Cycle Protection

    Warning 97 “Stop Delay” Illustration 5: Short Cycle Protection, Stop Delay 3.2.1.4 Anti-reverse Protection The anti-reverse protection function prevents the compressor scroll set from running in the wrong direction during stop. 14 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 15: Oil Return Management

    Scope & logging: Easy problem analysis. • Offline commissioning. • Save/send/mail projects anywhere. • Multiple drives in project file. Enables the service organization to be more efficient. • Compressor readout of frequency in RPS. Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 15...

  • Page 16: Undersized Compressor

    AMA is performed without the motor rotating and without uncoupling the load from the motor. N O T I C E Automatic motor adaptation (AMA) is not required when used with a VZH Danfoss compressor. 3.2.2.2 Motor Thermal Protection Motor thermal protection can be provided via: •...

  • Page 17: Built-In Pid Controller

    3.2.2.7 Motor Preheat Instead of using a space heater, Danfoss provides motor preheat functionality. To preheat a motor in a cold or damp environment, a small amount of DC current can be trickled continuously into the motor to protect it from condensation and cold starts.

  • Page 18: Programmable Set-Ups

    It is possible to program 1–20 events and actions. When the last event/action has been executed, the sequence starts over again from event [0]/action [0]. An example with 4 events/ actions is shown in Illustration 18 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 19: Comparators

    15% or more below the lowest rated supply voltage of the drive. The mains voltage before the dropout and the motor load determine how long it takes for the drive to coast. Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 19...

  • Page 20: Missing Mains Phase Detection

    The time before the drive trips is controlled by parameterization of the monitored protections. Voltage limit The inverter turns off to self-protect the internal components when the maximum voltage limits are reached. 20 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 21: Temperature Protection

    Terms like Complete Drive Module (CDM) and Power Drive Systems (PDS) are used to define the elements in the design. The objec- tive is to make more efficient and fewer energy consuming designs. Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 21...
  • Page 22 It is now possible to determine the total losses of a system for the 8 operating points defined in the standard, including the part load operation, via a simple addition of power losses. Danfoss helps its customers to avoid having to rely on system solution provid- ers, to ensure that their systems will retain a competitive advantage also in the future.

  • Page 23: Losses In Mains Cabling

    • The installation site has power interruptions or voltage dips. Danfoss offers the line reactor program VLT® Line Reactor MCC 103, see Danfoss.com. Harmonic filters The purpose of using harmonic filters is to reduce the distortion on the mains. The distortion is generated by the drives when switching the voltage to generate a frequency on the output.

  • Page 24: Drive, Input Side

    (IEC 61557-8). For example, Deif type SIMQ, Bender type IRDH 275/375, or similar. The Danfoss VLT® drives can be ordered with different types of RFI filters. See more details on RFI, the use of RFI filters, and EMC compliance in 6.5 Electromagnetic...

  • Page 25: Drive, Output Side

    Inverter With Danfoss VLT® drives, this intermediate section always uses DC coils, also known as DC line reactors or DC chokes. For cost con- siderations, most other drive manufacturers do not offer these DC line reactors as standard equipment. Danfoss regards these coils as essential for 2 main reasons: •...

  • Page 26: Motor Cables And Motor

    In standard IEC 61800-9-2:2017 annex D, a discussion on motor load and losses is found. A method to evaluate the losses generated in the motor operated with a drive can be found in the standards IEC 60034-2-1 and IEC TS 60034-2-4. 26 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 27: Specifications

    Applies to dimensioning of drive cooling. If the switching frequency is higher than the default setting, the power losses may increase. LCP and typical control card power consumptions are included. For power loss data according to EN 50598-2, refer to Danfoss MyDrive®...

  • Page 28: Mains Supply (L1, L2, L3)

    Applies to dimensioning of drive cooling. If the switching frequency is higher than the default setting, the power losses may increase. LCP and typical control card power consumptions are included. For power loss data according to EN 50598-2, refer to Danfoss MyDrive®...

  • Page 29: Control Input/Output

    Terminals 42 and 45 can also be programmed as digital outputs. The analog outputs are galvanically isolated from the supply voltage (PELV) and other high-voltage terminals. 4.4.5 Digital Inputs Programmable digital inputs Terminal number 18, 19, 27, 29 Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 29...

  • Page 30: Digital Outputs

    Mount a snubber circuit when connecting inductive loads to the relays. The relay outputs are galvanically isolated from the supply voltage (PELV) and other high-voltage terminals. 4.4.8 Relay Outputs, Enclosure Size H6 Programmable relay output 30 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 31: Rs485 Serial Communication

    Temperature during storage/transport -30 to +65/70 °C (-22 to +149/158°F) Maximum altitude above sea level without derating 1000 m (3281 ft) Maximum altitude above sea level with derating 3000 m (9843 ft) Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 31...

  • Page 32: Conforming Standards

    Switching frequency factory setting. • Switching pattern factory setting. • For power loss data according to EN 50598-2, refer to Danfoss MyDrive® ecoSmart website. N O T I C E The VLT® Compressor Drive CDS 803 with SXXX in the type code is certified against UL 508C. Example: CDS803P7K5T4E20H4XXCXXXSXXXXAXBXCXXXXDX The VLT®...

  • Page 33: Mechanical Dimensions

    239 (9.4) 74 (2.9) 105 (4.1) 120 (4.7) 200 (7.9) Depth [mm (in)] 206 (8.1) 241 (9.5) 255 (10) 242 (9.5) Mounting hole [mm (in)] 11 (0.43) 12.6 (0.50) 12.6 (0.50) – Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 33...

  • Page 34: Shipping Dimensions

    5 (16) 0.168 0.81 3.857 25 (82) 0.239 1.026 3.434 50 (164) 0.328 1.05 2.560 400 V 18.5 kW (25 hp) 5 (16) 0.132 0.88 5.220 25 (82) 0.172 1.026 4.772 34 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...
  • Page 35 0.632 1.18 1.494 100 (328) 0.712 1.348 150 (492) 0.832 1.17 1.125 10 (33) 0.408 1.24 2.431 50 (164) 0.592 1.29 1.743 100 (328) 0.656 1.28 1.561 150 (492) 0.84 1.26 Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 35...

  • Page 36: Mechanical Installation Considerations

    DC bus voltage in increments of 25%, 50%, 75%, and 100% rated voltage under no load for 30 minutes at each increment. See Illustration 18 for an illustration of this method. 36 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 37: Side-By-Side Installation

    Operating in standby mode reduces the risk of condensa- tion as long as the power dissipation keeps the circuitry free of moisture. Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 37...

  • Page 38: Gases

    This causes accelerated aging of the electronic components and the service life of the unit decreases. Dust deposits on the heat sink in the back of the unit also decrease the service life of the unit. 38 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 39: Air Humidity

    50 °C (122 °F) or the installation by altitude is higher than 1000 m (3281 ft), a larger VLT® Compressor Drive CDS 803 might be needed to run an undersized compressor. Consult Danfoss for support. 5.3.5.1 Derating Curves, 6.0, 7.5, and 10 kW...

  • Page 40: Derating Curves, 18.5-22 Kw

    Drives in the power range 30 kW are able to deliver 100% current in ambient temperatures up to 45 °C (113 °F) with a default switching frequency of 4.0 kHz (f_sw). If the switching frequency is increased, the following derating curves apply. 40 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 41: Derating For Low Air Pressure And High Altitudes

    5.3.6 Derating for Low Air Pressure and High Altitudes The cooling capability of air is decreased at low air pressure. For altitudes above 2000 m (6562 ft), contact Danfoss regarding PELV. Below 1000 m (3281 ft) altitude, derating is not necessary. For altitudes above 1000 m (3281 ft), decrease the ambient temperature or the maximum output current.
  • Page 42 VLT® Compressor Drive CDS 803 Mechanical Installation Design Guide Considerations Illustration 25: H3–H6 42 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 43: Acoustic Noise Or Vibration

    Before the materials can be removed, the drive must be disassembled. Product parts and materials can be dismantled and separa- ted. Generally, all metals, such as steel, aluminum, copper and its alloys, and precious metals can be recycled as material. Plastics, Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 43...
  • Page 44 IEC 62635 guidelines. To ease recycling, plastic parts are marked with an appropriate identifica- tion code. Contact your local Danfoss office for further information on environmental aspects and recycling instructions for professional recy- clers. End of life treatment must follow international and local regulations.

  • Page 45: Electrical Installation Considerations

    6.2 Fuses and Circuit Breakers Fuses and circuit breakers ensure that possible damage to the drive is limited to damage inside the unit. Danfoss recommends fuses on the supply side as protection. For further information, see the application note Fuses and Circuit Breakers found on www.dan-...

  • Page 46: Electrical Wiring

    – – – JJS-80 gG-63 30 (40) JJS-125 gG-80 Circuit breakers have not been evaluated by Danfoss as part of the certification process. 6.3 Electrical Wiring 6.3.1 Wiring Schematic 3-phase power input Motor UDC- Not present on all power sizes...

  • Page 47: Terminal Overview Of Enclosure Sizes

    There is no access to UDC- and UDC+ on the following units: IP20, 380–480 V, 30 kW (40 hp). 6.3.2 Terminal Overview of Enclosure Sizes H3–H5 -DC +DC Illustration 28: Enclosure Sizes H3–H5 Mains Relays Ground Control terminals Compressor Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 47...

  • Page 48: Terminal Overview Of Enclosure Size H6

    Use a shielded/armored compressor cable to comply with the EMC emission specifications and connect this cable to both the decoupling plate and the compressor. Also see 6.5.5 EMC-compliant Electrical Installation. Connect the ground cable to the ground terminal, then connect the mains supply to terminals L1, L2, and L3. 48 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 49: Grid Installations

    Ensure that the supply voltage does not exceed 440 V (3x380–480 V units) when connected to an IT mains source. 6.3.5 Relay Terminals Relay 1 • Terminal 01: Common. • Terminal 02: Normally open. • Terminal 03: Normally closed. Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 49...

  • Page 50: Control Terminals

    Use a flat-edged screwdriver to push down the lock lever of the terminal cover under the LCP, then remove the terminal cover as shown in the following illustration. Illustration 31: Removing the Terminal Cover 50 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 51: Setting Up Rs485 Serial Communication

    6.4.2 Configuring RS485 Serial Communication Procedure Connect RS485 serial communication wiring to terminals (P RS485) 68 and (N RS485) 69. Use shielded serial communication cable. Properly ground the wiring. Refer to 6.5.5 EMC-compliant Electrical Installation. Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 51...

  • Page 52: Electromagnetic Compatibility

    5 MHz. Most of the leakage current (I1) is carried back to the unit through the PE (I3), leaving only a small electromagnetic field (I4) from the shielded motor cable. The shield reduces the radiated interference but increases the low-frequency interference on the mains. Illustration 34: Electric Model Showing Possible Leakage Currents 52 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 53: Emc Emission Test Results

    Four categories are defined in the EMC product standard. The definitions of the 4 categories together with the require- ments for mains supply voltage conducted emissions are given in Table Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 53...

  • Page 54: Immunity Requirements

    Drives can only ensure compliance to the EMC Directive when end users connect combinations of Danfoss Drives products as described in our technical documentation. If any 3 -party products are connected to the load share or other DC terminals on the AC drives, Danfoss Drives cannot guaran- tee that the EMC requirements are fulfilled. 6.5.3 Immunity Requirements The immunity requirements for drives depend on the environment in which they are installed.
  • Page 55 1 kV/12 Ω CM Enclosure – – 10 V/m – 8 kV AD 6 kV CD Injection on cable shield. AD: Air Discharge CD: Contact Discharge CM: Common Mode DM: Differential Mode Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 55...

  • Page 56: Emc Compatibility

    Power supply (SMPS) including signal isolation of DC Internal inrush, RFI, and temperature measurement link circuits Gate drive for the IGBTs Custom relays Current transducers Mechanical brake Opto-coupler, brake module (optional) 56 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 57: Emc-Compliant Electrical Installation

    There is a risk of overvoltage. Isolation between components and critical parts could be insufficient and may not comply with PELV requirements. Use external protective devices or galvanic isolation. For installations above 2000 m (6500 ft) altitude, contact Danfoss re- garding protective extra low voltage (PELV) compliance.
  • Page 58 VLT® Compressor Drive CDS 803 Electrical Installation Design Guide Considerations - L C - IEC 60309 Illustration 36: Example of Proper EMC Installation 58 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 59: Emc-Compliant Cables

    The shield coverage, that is, the physical area of the cable covered by the shield - often stated as a percentage value. • Shield type (braided or twisted). 10⁵ 10⁴ 10³ 10² 10¹ 10ˉ¹ 10ˉ² 10ˉ³ 0.01 Illustration 37: Transfer Impedance (Z Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 59...

  • Page 60: Shielded Control Cables

    This terminal is connected to ground via an internal RC link. Use twisted-pair cables to reduce interference between conductors. The recommended method is shown in the following illustration. <10 mm Illustration 40: Twisted-pair Cables Minimum 16 mm (6 AWG) Equalizing cable Alternatively, the connection to terminal 61 can be omitted. 60 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 61: Rfi Filter Switch

    So, in plants with a high percentage of rectifier load, maintain harmonic currents at a low level to avoid overload of the transformer and high temperature in the cables. Illustration 42: DC-link Coils Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 61...

  • Page 62: Harmonics Emission Requirements

    Table 24: Harmonic Current 6.0–22 kW (8.0–30 hp), 380–480 V Individual harmonic current I Actual 6.0–22 kW (8.0–30 hp), IP20, 380–480 V (typical) 36.7 20.8 Limit for R ≥120 Harmonic current distortion factor (%) 62 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 63: Galvanic Isolation (Pelv)

    IEEE 519 -1992; G5/4. If there is a need for further reduction of harmonic currents, passive or active filters in front of the drives can be installed. Consult Danfoss for further information. 6.7 Galvanic Isolation (PELV) All control terminals and output relay terminals are galvanically isolated from mains power, which completely protects the control- ler circuitry from the input current.
  • Page 64 Leakage current THDv=0% THDv=5% Illustration 45: Influence of Line Distortion on Leakage Current If the leakage current exceeds 3.5 mA, compliance with EN/IEC 61800-5-1 (power drive system product standard) requires special care. 64 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 65: Using A Residual Current Device (Rcd)

    50 Hz 150 Hz Frequency Mains harmonics Cable Illustration 46: Mains Contributions to Leakage Current The amount of leakage current detected by the RCD depends on the cut-off frequency of the RCD. Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 65...
  • Page 66 See also application note Protection against Electrical Hazards. Protective grounding of the drive and the use of RCDs must always follow national and local regulations. 66 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...

  • Page 67: How To Order

    The Drive Configurator automatically generates an 8-digit sales number to be delivered to the local sales office. Furthermore, it is possible to establish a project list with several products and send it to a Danfoss sales representative. The Drive Configurator can be found on the global website: www.danfoss.com/drives.

  • Page 68: Accessories And Spare Parts

    XX: No options 38–39 D option DX: No D options 7.3 Accessories and Spare Parts For further details on available accessories and spare parts, visit store.danfoss.com. Table 27: Descriptions and Order Numbers for Accessories Description Order number LCP for all units 120Z0581 LCP kit for remote mounting, 3 m (9.85 ft) cable...

  • Page 69: Appendix

    Bulleted and dashed lists indicate listings of other information where the order of the information is not relevant. • Bolded text indicates highlighting and section headings. • Italicized text indicates the following: Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596 | 69...
  • Page 70 Parameter name. Parameter option. Parameter group name. Alarms/warnings. • All dimensions in drawings are in metric values (imperial values in brackets). • An asterisk (*) indicates the default setting of a parameter. 70 | Danfoss A/S © 2021.05 AJ330233902305en-000201 / 130R0596...
  • Page 71 Electrical data..................27, 27 Electrical installation................... 45 Output current..................27, 28 Electromagnetic compatibility..............52 Output frequency..................29 See EMC Output voltage....................28 Electronic thermal overvoltage...............17 Overload Electronic thermal overvoltage............17 General aspects..................52 Compatibility..................56 Use of EMC-compliant cables............59 Danfoss A/S © 2021.05 AJ330233902305en-000201/130R0596 | 71...
  • Page 72 VLT® Motion Control Tool MCT 10............7 RS485........................ 31 Voltage RS485 serial communication.............51, 51 Safety warning..................9 Voltage distortion..................62 Serial communication.................60 Shielded control cable................60 Website.......................7 Shipping dimensions.................. 34 Wiring schematic..................46 Shock........................ 39 Side-by-side installation................37 72 | Danfoss A/S © 2021.05 AJ330233902305en-000201/130R0596...
  • Page 73 The digital inputs can be used for controlling various functions of the drive. Digital outputs The drive features 2 solid-state outputs that can supply a 24 V DC (maxi- mum 40 mA) signal. Motor frequency. Rated motor frequency (nameplate data). Maximum compressor frequency. Danfoss A/S © 2021.05 AJ330233902305en-000201/130R0596 | 73...
  • Page 74 The DC coils in the drive produce a high-power factor, which minimizes the imposed load on the mains supply. Preset reference A defined preset reference to be set from -100% to +100% of the reference range. Selection of 8 preset references via the digital terminals. 74 | Danfoss A/S © 2021.05 AJ330233902305en-000201/130R0596...
  • Page 75 Do not use the trip lock state for personal safety. Instant motor voltage. Rated motor voltage (nameplate data). VT characteristics Variable torque characteristics used for pumps and fans. Danfoss A/S © 2021.05 AJ330233902305en-000201/130R0596 | 75...
  • Page 76 Danfoss can accept no responsibility for possible errors in catalogs, brochures, and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies.

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