Document: GF07Z304 Rev. 2 INSTRUCTION MANUAL INSTALLATION - OPERATION - MAINTENANCE HV6FS-MLD Vacuum Circuit Breakers – Drawout Type 4.8 & 7.2kV Voltage Classes (Fast Closing w/UV Release) Issued: 10/2006 CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.
CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.
INSTRUCTION MANUAL For the Installation, Operation and Maintenance of HV6FS-MLD Vacuum Circuit Breakers – Drawout Type 4.8 & 7.2kV Voltage Classes (Fast Closing w/UV Release) WARNING Never attempt to install, operate, maintain or dispose of this equipment until you have first read and understood all of the relevant product warnings and user directions that are contained in this Instruction Manual.
CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.
SAFETY Page 1 IMPORTANT MESSAGES Read this manual and follow its instructions. Signal words such as DANGER, WARNING and CAUTION will be followed by important safety information that must be carefully reviewed. DANGER Indicates a situation that will result in death, serious injury, and severe property damage if you do not follow instructions. WARNING Means that you might be seriously injured or killed if you do not follow instructions. Severe property damage might also occur.
Page 2 SAFETY QUALIFIED OPERATORS ONLY Only qualified persons are to install, operate, or service this equipment according to all applicable codes and established safety practices. A qualified person must: 1) 2) 3) 4) 5) 6) Carefully read the entire instruction manual. Be skilled in the installation, construction or operation of the equipment and aware of the hazards involved.
SAFETY DANGER Page 3 HAZARDOUS VOLTAGE will cause severe injury, death, fire, explosion and property damage. • Turn off and lock out Primary and Control Circuit Power before servicing. • Keep all panels and covers securely in place. • Never Defeat, Modify, or Bypass any Safety Interlocks • Qualified Operators only CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.
Page 4 TABLE OF CONTENTS SAFETY....................................................................................................................................................1 INTRODUCTION ......................................................................................................................................6 GENERAL DESCRIPTION.......................................................................................................................7 Components..............................
TABLE OF CONTENTS Page 5 STORAGE ..............................................................................................................................................34 Storage........................................................................................................................................34 Inspection During Storage...........................................................................................................34 SPECIFICATIONS.....................................
Page 6 INTRODUCTION It is the intent of this manual to provide a guide for safely installing, operating and maintaining Toshiba vacuum circuit breakers. This manual consists of a section of general safety instructions and is marked throughout with warning symbols. Read this manual thoroughly before installation, operation and maintenance of this equipment. This manual and all accompanying drawings should be considered a permanent part of the equipment.
GENERAL DESCRIPTION Page 7 The Toshiba HV6FS-MLD vacuum circuit breaker described in this manual is suitable for use on systems of 4.8kV and 7.2kV voltage classes that require interrupting ratings of 16kA and 14kA respectively and a continuous current rating of 630A. The circuit breaker is intended for use in limited applications requiring small physical size and low maintenance. This breaker is designed for drawout operation using the H6A-HLS cell.
Page 8 GENERAL DESCRIPTION SAFETY DEVICES Safety interlocks and guards are provided as an integral part of the equipment design. These devices are provided for safety to the operator. DANGER WARNING Never defeat, modify or bypass any safety devices, interlocks or operating mechanism. This would make the equipment unsafe. Fire, explosion, severe injury, death and property damage could occur. Do not operate this equipment unless all covers and panels are in place. Fig.
GENERAL DESCRIPTION Page 9 INDICATORS AND CONTROLS (Fig. 4) The following front panel indicators and controls are provided: 1) On-Off Indicator - Indicates if the circuit breaker is OFF (Green) or ON (Red). When the indicator reads OFF, the main contacts of the circuit breaker are open. When the indication is ON, the main contacts are closed. 2) Closing Spring Status Indicator - Indicates if the closing springs are CHARGED (Yellow) or DISCHARGED (White).
Page 10 RECEIVING, INSPECTION AND HANDLING RECEIVING AND UNPACKING The circuit breaker units are subjected to factory production testing prior to being packed and shipped. ACCEPTANCE INSPECTION Confirm that the circuit breaker and cell units are complete, correct as specified and undamaged from shipment and handling. Upon receipt of the equipment, do the following: 1) Make an immediate inspection for damage that might have occurred during shipment.
RECEIVING, INSPECTION AND HANDLING Page 11 HANDLING AND MOVING When handling and moving the circuit breaker and cell, the techniques shown in this section may be used. Care and caution should be used when handling the circuit breaker and cell units to avoid damage to the equipment and personal injury. Always keep the equipment in a generally upright position. Refer to Fig. 8 and Fig. 9 for the correct methods of lifting and moving the circuit breaker and cell.
Page 12 WARNING INSTALLATION Do not install this equipment in areas where unusual service conditions exist. Using this equipment in other than usual service conditions can result in equipment failure. Toshiba HV6FS-MLD circuit breakers are intended for use in usual service conditions as defined in IEEE C37.20.2. The temperature of the cooling air (ambient air temperature) surrounding the breaker should be between the limits of -5°C (23°F) and +40°C (104°F).
INSTALLATION Page 13 MOUNTING THE CIRCUIT BREAKER CELL The circuit breaker cell is designed to mount to the floor or shelf of the installation compartment. The floor or shelf to which the cell is mounted should be flat and level within ± 0.5 mm (± 0.02 in.). If there are any noticeable gaps between the cell base and the mounting surface, fill them in using flat washers as spacers.
Page 14 INSTALLATION GROUND CONNECTIONS The circuit breaker cell must be grounded in accordance with the requirements of the National Electrical Code, Article 250 or applicable local standards. WARNING Proper grounding connections must be made to the circuit breaker cell before incoming power is applied.
INSTALLATION Page 15 CONTROL CIRCUIT CONNECTIONS Control circuit wiring is connected to the circuit breaker by means of a control plug (green color) located on the breaker front panel (Fig. 15). A control wire harness (Fig. 16) is furnished with the circuit breaker for making this connection. Using the supplied harness, connect control wiring in accordance with the appropriate wiring diagram shown in Fig. 31 in the OPERATION section of this manual. Fig. 15 Control Circuit Plug Fig.
Page 16 INSTALLATION PLACING THE CIRCUIT BREAKER IN THE CELL DANGER WARNING Hazard of fire, explosion, severe injury, death and property damage. Circuit breaker must be OFF before installation or removal from cell. Circuit breaker contains powerful springs. Discharge springs completely before installation or servicing. Before attempting to install the circuit breaker in the cell, verify that the continuous current, voltage and interrupting ratings are correct for the power system. Fig.
INSTALLATION Page 17 PLACING THE CIRCUIT BREAKER IN THE CELL (cont’d) Grasp the handles on the breaker with both hands and, while lifting the interlock release lever with the left hand, insert the breaker into the cell ( Fig. 19. Continue to roll the breaker into the cell until the arrow on the front cover indicates the DISCONNECTED position (Fig. 20), then release the lever. Check to make sure the interlock release lever has returned to its original lowered position. Insert the breaker holding pin.
Page 18 PRE-ENERGIZATION CHECK GENERAL BEFORE ENERGIZING THE CIRCUIT BREAKER for the first time, follow the procedure below to verify that the equipment is properly installed and functional. DANGER WARNING WARNING WARNING WARNING Hazardous Voltage. Turn off and lock out all primary and control circuit power sources prior to performing this pre-energization check. Do not operate this equipment until a complete safety inspection has been made.
OPERATION Page 19 MOVING THE CIRCUIT BREAKER FROM THE DISCONNECTED TO THE CONNECTED POSITION DANGER Hazard of fire, explosion, severe injury, death and property damage. Circuit breaker must be OFF before moving to or from the CONNECTED position. WARNING Do not move the circuit breaker to the CONNECTED position without first connecting the secondary control circuit plug. Do not disconnect the plug while the breaker is in the CONNECTED position. Fig.
Page 20 OPERATION MOVING THE CIRCUIT BREAKER FROM THE CONNECTED TO THE DISCONNECTED POSITION DANGER Hazard of fire, explosion, severe injury, death and property damage. Circuit breaker must be OFF before moving to or from the CONNECTED position. TO MOVE THE CIRCUIT BREAKER TO THE DISCONNECTED POSITION: 1. Check to be sure that the On-Off Indicator reads OFF (Green). Push the manual trip lever in the direction of the arrow if necessary to open the circuit breaker.
PRE-ENERGIZATION CHECK Page 21 MANUAL OPERATION WARNING Powerful springs. Do not place your hands or any part of your body inside the circuit breaker while the indicators show CHARGED (yellow) or ON (red). CAUTION To avoid damaging the mechanism, do not close the circuit breaker when the On-Off Indicator shows ON (red). MANUAL CLOSING: Fig. 25 Preparing to Manually Close Breaker 1. Check to make sure that the On-Off indicator shows OFF (green). 2.
Page 22 OPERATION MANUAL OPENING: 1. Push the trip lever in the direction of the arrow (Fig. 27). 2. The On-Off indicator changes to OFF (green). ELECTRICAL OPERATION The flow chart shown in Fig. 30 illustrates the sequence of electrical operation. Refer to the schematic shown in Fig. 31 for determining external control circuit connections to the circuit breaker. UNDERVOLTAGE TRIP All HV6FS drawout circuit breakers are furnished with an undervoltage trip device.
OPERATION Page 23 Circuit Breaker Open Control Power Applied Motor Begins Operating Closing Springs Begin Charging Closing Springs Charged Motor Stops - - - - Spring Status Indicator Changes to Yellow - - - - Standby for Close Operation Closing Signal Given Close Coil Energized Circuit Breaker Closes - - - - Spring Status Indicator Changes to White and On-Off Status Changes to ON Auxiliary Relay Closes Anti-Pumping Circuit Completed - - - - Next Close Operation is Not Possible Unless Close S
Page 24 MAINTENANCE Green 17 16 PR3 NT3 C4 C04 9 8 15 H K 7 14 N2 6 5 13 12 11 10 A1 A2 B1 B2 A01 A02 B01 B02 4 3 2 1 Fig. 31 125 VDC Control Circuit Schematic SYMBOL DESCRIPTION M Motor TC Voltage Trip Coil CC Close coil UV Undervoltage Trip Coil a1 to a3 Auxiliary Contacts (N.O.) b1 to b3 Auxiliary Contacts (N.C.) X Control Relay X-a Control Relay Contact (N.O.) X-b Control Relay Contact (N.C.) Y Auxiliary Relay Y-b Auxiliary Relay Contact (N.C.
MAINTENANCE Page 25 MAINTENANCE PROGRAM MAINTENANCE RECORD In order to ensure continued reliable and safe operation of the equipment, a program of periodic maintenance must be established. Operating and environmental conditions will usually dictate the frequency of inspection required. NFPA Publication 70B "Electrical Equipment Maintenance" may be used as a guide for setting up the maintenance program. Keep a permanent record of all maintenance work.
Page 26 RECOMMENDED INSPECTION AND MAINTENANCE TYPES NOTE: Refer to the SAFETY section of this manual for important information. A. Acceptance Inspection This inspection confirms that the circuit breaker unit is complete, correct as specified, and undamaged from shipment. The procedure for this inspection is outlined in the RECEIVING, INSPECTION AND HANDLING section of this manual. B. Patrol Inspection Inspection is made of the condition of the circuit breaker while it is energized.
MAINTENANCE Page 27 Table 2 Check Points for Periodic Inspection Check Point Operating Mechanism Check Item Loose bolts, nuts or screws Check Method Tighten using screwdriver or wrench. Criteria Make sure all bolts, nuts and screws are tight. Disposition Tighten if loose. See Table 1 for tightening torques. Main Circuit Dust or foreign matter inside Visual inspection. The circuit breaker should be clean and contain no foreign matter. Wipe with a clean dry cloth.
Page 28 MAINTENANCE Table 2. Check Points for Inspection (cont’d) Check Point Auxiliary Switch Check Item Check Method Terminals loose or disconnected Visual inspection. Tighten using a screwdriver. Criteria What to do Repair if Make sure terminals are disconnected. not loose or disconnected. Tighten if loose. See Table 1 for tightening torques. Control Circuits Case/contacts Visual inspection. Make sure there is no damage or warping. Replace if damaged or warped.
MAINTENANCE Page 29 VACUUM CHECK A sufficient level of vacuum is necessary for proper performance of the vacuum interrupters. Although vacuum leaks are rare, the vacuum integrity should be checked periodically. The relationship between dielectric breakdown voltage of the contact gap and internal vacuum interrupter pressure has been found to be generally predictable. Therefore, vacuum interrupter integrity is checked by performing a high potential test across the open gap of the interrupter.
Page 30 MAINTENANCE CRITERIA: 1. If a current flow above 5 milliamperes is observed or if breakdown occurs, one or more of the interrupters has insufficient vacuum and must be replaced. Exception: If the current exceeds 5 milliamperes the first time the voltage is brought up, reduce the voltage to zero and increase it again. It may be necessary to repeat this procedure a few times. 2.
DISPOSAL Page 31 DISPOSAL Contact your state environmental agency for details on disposal of electrical components and packaging in your particular area. CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.
STORAGE Page 32 STORAGE If the circuit breaker is to be stored for any length of time prior to installation, the following precautions should be taken: 1) The original packing should be restored, if possible. 2) Do not subject the equipment to moisture or sun rays. Store in cool, clean, and dry location. 3) Place a dust cover over the circuit breaker packaging to protect against dirt and moisture. 4) Store in an upright position.
SPECIFICATIONS Page 33 Table 3 Circuit Breaker Ratings – Motor Stored Energy Operation HV6FS-MLD Type Rated Voltage kV, rms AC Withstand Voltage kV, rms 22 – 1 Min. kV 60 A, rms 630 Hz 50/60 Basic Impulse Level Maximum Continuous Current Rated Frequency Rated Interrupting Current (0.15 P.F.) Rated Making Current kA (Sym.), rms 7.2 4.8 14 16 kA (Peak) 31.5kA kA, rms 12.5 cycles 3 Opening Time ms 20 (Typical) Closing Time ms 30 Charging Time sec 1.
Page 34 WARRANTY AND LIMITATION OF LIABILITY Toshiba International Corporation ("Company") warrants that all equipment and parts described herein will be free from defects in materials and workmanship.