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Vacon CX Manual

Frequency converters brake choppers and resistors
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V ACON CX/CXL/CXS
FREQUENCY CONVERTERS
Brake choppers
and resistors
Subject to changes withour notice
F O R S M O O T H C O N T R O L

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Summary of Contents for Vacon CX

  • Page 1 V ACON CX/CXL/CXS FREQUENCY CONVERTERS Brake choppers and resistors Subject to changes withour notice F O R S M O O T H C O N T R O L...

  • Page 2: Table Of Contents

    Power rating of standard resistors 4 Environment Dimensioning of brake resistors CHOICE OF BRAKE RESISTOR 5 General Sizing principle Choice of standard resistor CONNECTIONS General Thermal protection Resistor package connections DIMENSIONS Vacon Plc Phone: +358-201-2121 Fax: +358-201-212 205 Service: +358-40-8371 150 E-mail:vacon@vacon.com http://www.vacon.com...

  • Page 3: General

    Table 2.1.1 the energy. The brake chopper in the Vacon CX frequency converter is rated for continuous drive rated power. Figure 1.2-1. The brake components and their basic connection...

  • Page 4: Technical Data

    M10:315-400 4 x BR3R10,2 5520 4 x 185 Table 2.1-1 Vacon BR_ standard resistors for partial use, CX_4 and CX_5 ranges. 1) Marking CX_, etc. refers to all Vacon series; CX, CXL and CXS. Vacon Plc Phone: +358-201-2121 Fax: +358-201-212 205 Service: +358-40-8371 150 E-mail:vacon@vacon.com...

  • Page 5: Power Rating Of Standard Resistors

    31.2 45kW:95 M8: 55...90 2xBR3R10.2 96.0 62.4 Table 2.1-2 Vacon BR_ standard resistors for partial use, CX_6 and CX_2 ranges. Maximum resistor temperature. +280°C Includes separate connector box 2.2 Power rating of standard resistors. shows the relative power handling capac- The power handling capacity of the stand- ity at various duty cycles, i.e.

  • Page 6: Environment

    2.4 Dimensioning of brake resistors You can connect an external brake resist- sistor has to be protected also against ance to Vacon CX frequency converters overtemperature. The overtemperature equipped with a brake chopper. The mini- protection has to be connected as shown mum resistance values as well as the in Chapter 4.2.

  • Page 7: Choice Of Brake Resistor

    Tables 2.1-1 and 2.1-2. The standard resistors supplied When you choose the brake resistor, start by Vacon Plc, are designed for partial use from the requirements of the process/ according to the limits presented in the pre- drive.

  • Page 8: Choice Of Standard Resistor

    Brake choppers and resistors Page 8 (14) Vacon 3.3. Choice of a standard resistor The sizing of Vacon standard resistors can be checked following the procedure below. For the calculation you need: - motor rated power (kW) - motor rated speed (1/min)
  • Page 9 Increase the braking time, decrease the moment of inertia of the load or use a larger frequency converter. b) Calculate the average power during one and average power handling capacity. Vacon Plc Phone: +358-201-2121 Fax: +358-201-212 205 Service: +358-40-8371 150 E-mail:vacon@vacon.com...
  • Page 10 = ____/ ____ x 100% = ____% ment of inertia or increase your frequency converter size. Figure 3.3-4 Relation between duty cycle and average braking power. Vacon Plc Phone: +358-201-2121 Fax: +358-201-212 205 Service: +358-40-8371 150 E-mail:vacon@vacon.com...

  • Page 11: Connections

    Table 2.1-1 and –2. When you size the Minimum resistor value per cables, note that the input fuses f the con- resistor verter also protect this cable. Separate resistors One resistor Vacon type used used M11; CX_4 0.84 0.42 M11; CX_5 M11;...

  • Page 12: Thermal Protection

    We rec- ommend that you use this contact to stop Note: If you use other resistors than Vacon the drive, either by removing power as in BR they must be equipped with thermal Figure 4.2-1, by linking it to the Start/ supervision.
  • Page 13 T2. Connect earth to the earthing terminal, see Figure 4.3-1 Figure 4.3-1 Connecting the brake resistor. On Vacon BR3R10.2 and bigger units con- taining two or more parallelly connected re- sistors a separate, included, terminal box is used, see Figure 4.3-2 Figure 4.3-2 Brake terminal box...

  • Page 14: Dimensions

    66.5 6,5x15.5 BR36R1.0 / BR75R1.0 H2 L1 Pg1- Pg2- 650 66 6,5x15 BR18R2.0 H2 L1 Pg1- Pg2- 650 66 6,5x15 BR12R2.6 H2 L1 Pg1- Pg2- 650 66 6,5x15 Vacon Plc Phone: +358-201-2121 Fax: +358-201-212 205 Service: +358-40-8371 150 E-mail:vacon@vacon.com http://www.vacon.com...
  • Page 15 The resistor package contains a separate ter- minal box for connecting the BR6R5.1 pack- ages, see Figure 5.1-1. Fastening the enclosure Figure 5.1-1. Connecting the resistors to the terminal box. Vacon Plc Phone: +358-201-2121 Fax: +358-201-212 205 Service: +358-40-8371 150 E-mail:vacon@vacon.com...
  • Page 16 VACON PLC PL 25 Runsorintie 7 65381 VAASA Tel: +358-201-2121 Fax: +358-201-212 205 Service: +358-40-8371 150 E-mail: vacon@vacon.com http://www.vacon.com...

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