Fuji Electric BUC-D Series Instruction Manual
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Fuji Electric BUC-D Series Instruction Manual

Fuji Electric BUC-D Series Instruction Manual

Stack type dynamic braking unit (690v type)
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BUC-D Series (690V Type)
Thank you for purchasing our dynamic braking unit (BUC-D Series).
• This product is a device to discharge the braking power to a resistor in a braking operation of the Fuji's inverter for
general industry. Read through this instruction manual to become familiar with proper handling and correct use.
• Improper handling might result in incorrect operation, a short life, or even a failure of this product.
• Deliver this manual to the end user of this product. Keep this manual in a safe place until this product is discarded.
• For the installation and selection of peripheral equipment exclusive to the stack type of inverters, refer to the
FRENIC-VG User's Manual (Stack Type Edition).
• For the configuration of the inverter functions and operating procedure, refer to the FRENIC-VG User's Manual (Unit
Type / Function Codes Edition).
• For details about PWM converters and diode rectifiers, refer to the FRENIC-VG User's Manual (Stack Type Edition).
Fuji Electric Co., Ltd.
Stack Type Dynamic Braking Unit
Instruction Manual
INR-SI47-1846-E

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  • Page 1 Stack Type Dynamic Braking Unit BUC-D Series (690V Type) Thank you for purchasing our dynamic braking unit (BUC-D Series). • This product is a device to discharge the braking power to a resistor in a braking operation of the Fuji's inverter for general industry.
  • Page 2 Copyright © 2014 Fuji Electric Co., Ltd. All rights reserved. No part of this publication may be reproduced or copied without prior written permission from Fuji Electric Co., Ltd. All products and company names mentioned in this manual are trademarks or registered trademarks of their respective holders.

  • Page 3: Table Of Contents

    Preface Thank you for purchasing our dynamic braking unit (BUC-D Series).This product is a device to discharge the braking power to a resistor in a braking operation of the Fuji's inverter for general industry. Read through this instruction manual to become familiar with proper handling for correct use. Improper handling might result in incorrect operation, a short life, or even a failure of this product as well as the motor.
  • Page 4 [ 5 ] CPU error .................................23 [ 6 ] Hardware error ..............................24 [ 7 ] Heat sink overheat ............................24 [ 8 ] Dynamic breaking unit internal overheat......................24 [ 9 ] Inter- dynamic breaking unit communications link error .................24 Chapter 5 MAINTENANCE AND INSPECTION ........................ 25 5.1 Inspection Interval ..............................

  • Page 5: Safety Precautions

     Safety precautions Read this manual thoroughly before proceeding with installation, connections (wiring), operation, or maintenance and inspection. Ensure you have sound knowledge of the device and familiarize yourself with all safety information and precautions before proceeding to operate the inverter. Safety precautions are classified into the following two categories in this manual.
  • Page 6 Wiring • Do not connect the DC terminals (P(+) and N(-)) to the connection terminals on the inverter side in mistake for the polarity （+ and –）. • Use wires in the specified size. • Tighten terminals with specified torque. Otherwise, a fire could occur.
  • Page 7 Maintenance and inspection, and parts replacement • Before changing the slide switches on the control printed circuit board in maintenance or inspection, turn the power OFF, wait at least ten minutes, and make sure that the charging lamp are turned OFF. Further, make sure, using a multimeter or a similar instrument, that the DC link bus voltage between the terminals P(+) and N(-) has dropped to the safe level (+25 VDC or below).

  • Page 9: Chapter 1 Before Use

    The 1st week of January is indicated as "01." Production year: Last digit of year Product version If you suspect the product is not working properly or if you have any questions about your product, contact your Fuji Electric representative.

  • Page 10: External Appearance

    1.2 External Appearance Outside and inside views Hoist hole Hoist hole φ26 φ26 Cooling fans N(-) bar Keypad enclosure Handle P(+) bar Controle circuit terminal block Warning plate Charge Handle lamp Casters Hoist holes Front cover φ26 Sub nameplate Main nameplate Figure 1.2-1 Rank 4 (500 kW) Warning plates and label Figure 1.2-2 Warning Plates and Label...

  • Page 11: Precautions For Using Dynamic Breaking Unit

    1.3 Precautions for Using dynamic breaking unit This section provides precautions in introducing dynamic breaking units, e.g. precautions for installation environment, power supply lines, wiring, and connection to peripheral equipment. Be sure to observe those precautions. 1.3.1 Installation environment Install the dynamic breaking unit in an environment that satisfies the requirements listed in Table 1.3-1. Table 1.3-1 Environmental Requirements Item Specifications...
  • Page 12 For details, refer to the Fuji Electric technical information "Engineering Design of Panels" or consult your Fuji Electric representative.

  • Page 13: Storage Environment

    1.3.2 Storage environment The storage environment in which the dynamic breaking unit should be stored after purchase differs from the installation environment. Store the dynamic breaking unit in an environment that satisfies the requirements listed below. [ 1 ] Temporary storage Table 1.3-2 Storage and Transport Environments Item Specifications...

  • Page 14: Chapter 2 Mounting And Wiring

    Chapter 2 MOUNTING AND WIRING 2.1 Mounting the dynamic breaking unit (1) Installation environment Mount the dynamic breaking unit at the place satisfying the requirements given in Chapter 1, Section 1.3.1 "Installation environment." (2) Mounting base Install the dynamic breaking unit on a base made of metal or other non-flammable material. Do not mount the dynamic breaking unit upside down or horizontally.

  • Page 15: Terminal Arrangement And Screw Sizes (Main Circuit Terminals)

    2.1.1 Terminal Arrangement and Screw Sizes (Main circuit terminals) [ 1 ] Rank 4 (500 kW) (Unit: mm) Internal front view Right side view of rank 4, external braking resistor connecting terminal the cabinet should have relay bar terminals. Secure terminals with insulators to prevent them from short-circuiting each other.

  • Page 16: Wiring

    2.2 Wiring 2.2.1 Connection diagram Single-phase 690V P(+) N(-) (Note11) External braking resistor The microswitch for DC fuse blowout detection (Note1) DCF2 BUC-D DCF1 Dynamic braking unit (Master) Ｆdc1 Ｐ（＋） Ｆdc2 Ｎ（－） Auxiliary fan Fan power input power input Auxiliary control power input Current (Note2)
  • Page 17 (Note 1) Using a PWM converter for the connection, insert an insulation transformer or auxiliary B contact (normally-closed) of a power side magnetic contactor. (Note 2) To retain an alarm output signal even if the main power has shut down, connect these terminals to the power supply lines. Without power supply to these terminals, the dynamic breaking unit can run.

  • Page 18: Removing And Mounting The Front Cover And The Wiring Guide

    Follow the procedure below. (In the following description, the dynamic breaking unit has already been installed.) 2.2.2 Removing and mounting the front cover and the wiring guide (1) To remove the front cover, loosen the screws (ten) on the front cover. The front cover fixing points have double circle holes that allow the front cover to be removed without removing the screws.

  • Page 19: Basic Connections

    2.2.3 Basic Connections (1) The grounding terminal must be grounded to prevent disasters such as electric shock and fire and reduce the noise. (2) Use a reliable crimp terminal to connect each lead. (3) After making connections (wiring), check that: 1) leads are correctly connected, 2) all necessary connections are made, and 3) no terminal or wire is short-circuited or grounded.

  • Page 20: 2 ] Terminal Functions (Main Circuit Terminals)

    [ 2 ] Terminal functions (main circuit terminals) Symbol Name Functions Three sets of external braking resistor are used, and it connects with DB1, DB2, and DB1, DB2, DB3 External braking DB3 between DC link bus N bars. resistor connecting terminal Connects the P(+)-N(-) line of inverter.

  • Page 21: 3 ] Detailed Functions Of Control Circuit Terminals

    [ 3 ] Detailed functions of control circuit terminals In general, the covers of the control signal wires are not specifically designed to withstand a high voltage (i.e., reinforced insulation is not applied). Therefore, if a control signal wire comes into direct contact with a live conductor of the main circuit, the insulation of the cover might break down, which would expose the signal wire to a high voltage of the main circuit.
  • Page 22 Table 2.2-4 Symbols, Names and Functions of the Control Circuit Terminals (Continued) Symbol Name Functions [PLC] PLC signal (1) Connects to PLC output signal power supply. power Rated voltage: +24 VDC (Allowable range: +22 to +27 VDC), Maximum 100 mA (2) This terminal also supplies a power to the load connected to the transistor output terminals.
  • Page 23 Table 2.2-4 Symbols, Names and Functions of the Control Circuit Terminals (Continued) Symbol Name Functions Alarm content [Y2] Transistor output 2 Provides the operation status of the protection function by 3bit terminals [Y2] to[Y4]. Refer to the chapter 4 for the relation between terminals and the protection feature. [Y3] Transistor output 3...

  • Page 24: 4 ] Wiring For The Control Circuit

    [ 4 ] Wiring for the control circuit The following three wiring routes are available for the control circuit. (1) Wiring route for DC fuse blowout detection. (Leading in from the top at the front side) (2) Wiring route from the left-hand side of the front cover. (3) Wiring route from the right-hand side of the front cover.
  • Page 25 The wiring route for DC fuse blowout detection is shown in Figure 2.2-8. On the printed circuit boards, aluminum electrolytic capacitors, high-voltage circuits, and heat sinks for cooling electronic devices are mounted. To prevent the wires from coming into contact with those components, be sure to secure the wires to the cable tie fixtures using cable ties.

  • Page 26: Setting Up The Slide Switches

    2.2.6 Setting up the slide switches Before changing the slide switches on the control printed circuit board, turn the power OFF, wait at least ten minutes, and make sure that the charging lamp is turned OFF. Further, make sure, using a multimeter or a similar instrument, that the DC link bus voltage between the terminals P(+) and N(-) has dropped to the safe level (+25 VDC or below).

  • Page 27: Fan Power Switching Connector Cn Ux

    Table 2.2-5 Function of Each Slide Switch Switch Function Switches the service mode of the digital input terminals between SINK and SOURCE. ▪ This switches the input mode of digital input terminals [X2] to [X7] to be used as the SINK or SOURCE mode.

  • Page 28: Connecting Optical Fiber Cable

    2.2.8 Connecting optical fiber cable ・ The cable may be pinched by the surface cover. To protect the cable, it is required to attach a fixing jig to guide the route or spiral tube around the cable. ・ If the plastic optical fiber is bent with curvature of 35 mm or less for a long period of time, the inter- dynamic breaking unit communications link error may occur to generate an alarm.

  • Page 29: Chapter 3 Test Run Procedure

    (1) First, check that the dynamic breaking unit is correctly wired, referring to Chapter 2, Section 2.3.5 "Wiring of main circuit terminals and grounding terminals." (2) If the Alarm relay output [30A/B/C] is turned ON, Go to Section 4.3. The protective functions has been activated. If any problems persist after the above recovery procedure, contact your Fuji Electric representative.

  • Page 30: Troubleshooting

    DC fuse blown error to prevent the secondary damage. The dynamic breaking unit could be broken, so immediately contact your Fuji Electric representative. Memory error This function is activated when a memory error such as a data write error occurs.

  • Page 31: 2 ] Overvoltage

     Take measures against surges and noise. dynamic breaking unit.  Ask your Fuji Electric representative to repair the dynamic breaking unit. (2) The fuse blew due to ground Disconnect the wiring from the external braking resistor connecting terminals faults that have occurred at the [DB1], [DB2] and [DB3] and perform a Megger test for the inverter and the motor.

  • Page 32: 6 ] Hardware Error

    Check the printed circuit board(s) for short circuits, accumulation of dust or dirt. circuit board(s).  Ask your Fuji Electric representative to repair the dynamic breaking unit. (3) The control circuit PCB or The control circuit PCB or power supply PCB (including the gate PCB) needs to power supply PCB is be replaced.

  • Page 33: Chapter 5 Maintenance And Inspection

    Replacement of fuses *1 The decennial inspection (except replacement of cooling fans) should be performed only by the persons who have finished the Fuji Electric training course. Contact the sales agent where you purchased the product or your nearest Fuji Electric representative.

  • Page 34: Periodic Inspection

    5.3 Periodic Inspection Periodical inspection must be performed after stopping operations, turning off the power supply, and removing the front cover. Even if the power has been shut down, it takes the time for the DC link bus capacitor to discharge. After the charging lamp is turned OFF, therefore, make sure for safety that the DC link bus voltage has dropped to the safe level (+25 VDC or below) using a multimeter or a similar instrument.

  • Page 35: List Of Periodic Replacement Parts

    (3) Cooling fans can be replaced by users. As for other parts, only the persons who have finished the Fuji Electric training course can replace them. For the purchase of spare cooling fans and the request for replacement of other parts, contact the sales agent where you purchased the product or your nearest Fuji Electric representative.

  • Page 36: Inquiries About Product And Guarantee

    1) In the event that breakdown occurs during the product's warranty period which is the responsibility of Fuji Electric, Fuji Electric will replace or repair the part of the product that has broken down free of charge at the place where the product was purchased or where it was delivered.

  • Page 37: 2 ] Exclusion Of Liability For Loss Of Opportunity, Etc

    (3) Trouble diagnosis As a rule, the customer is requested to carry out a preliminary trouble diagnosis. However, at the customer's request, this company or its service network can perform the trouble diagnosis on a chargeable basis. In this case, the customer is asked to assume the burden for charges levied in accordance with this company's fee schedule.
  • Page 38 FRENIC-VG series of inverters. Please feel free to send your comments regarding any errors or omissions you may have found, or any suggestions you may have for generally improving the manual. In no event will Fuji Electric Co., Ltd. be liable for any direct or indirect damages resulting from the application of the information in this manual.
  • Page 39 Fuji Electric Co., Ltd. Gate City Ohsaki, East Tower, 11-2, Osaki 1-chome, Shinagawa-ku, Tokyo, 141-0032, Japan Phone: +81 3 5435 7058 Fax: +81 3 5435 7420 URL http://www.fujielectric.com/ 2014-3...

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Buc s-69d

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