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    HVG .


    A/S A/S .

    HVG Series

    Vacuum Circuit BreakerInstruction Manual

  • 2

  • >> 3

    VCB | HVG Series

    Safety Practices During Installation

    Safety Practices During Operation

    Safety Practices During Maintenance

    (, )

    Do not work on the breaker unless theprimary circuits are disconnected.

    When connecting bus-bars, tighten bolts using our standards.

    The product should be installed and tighened on the plate area.

    Do not install the breaker in areas with high temperature, high humidity, dust,corrosive or vibrating conditions.

    Concrete dust or any other dust should not be inside of the product when it installed. It can cause fire or misoperation.

    Connet the control jack tight, otherwise it can cause the misoperation.


    . .

    bolt torque

    . .


    , , , , ,


    , .

    , ,


    , .

    control jack .


    Do not touch the main and control circuit while the productis in operation. The hazardous voltage can cause serious problem.

    Do not let the product stay in the DISCONNECTION position with UNLOCKstate.

    When the heavy product fall down onthe gound, it can cause the serious accident or product damage.

    . .

    disconnection (E, F2 )

    unlock (G )



    Before doing any maintenance, alwaysopen the breaker and make sure that the main and control circuits are not charged.The voltage can be hazardous.

    Discharge the springs and open the breakers before performing any breaker maintenance, inspection or repair. Charged closing or tripping spring can cause serious injury.

    Use the standard pressure torque to tighten the bolts. Loosening the bolts can cause fire.

    Replacing parts should be done by ourservice agent.

    Operating the breaker should not be used more than its life time specified incatalogue.

    open ,

    . .




    bolt torque

    . bolt




    ( catalogue )


  • 1031







  • 2.1 Service Condition

    1) Ambient Temperature: MAX 40 / MIN -25

    2) Relative Humidity: Less than 95%

    3) Site Altitude: Less than 1000 m

    2.2 Current Consumption & Voltage of Control Circuit

    2.3 Operating Time

    1) Spring Charge Time < 10 s

    2) Closing Time < 60 ms

    3) Opening Time < 30 ms

    4) Arcing Time < 15 ms

    5) Breaking Time < 50 ms


    1) : MAX 40 / MIN -25

    2) : 95%

    3) : 1000 m .



    1) < 10 s

    2) < 60 ms

    3) < 30 ms

    4) < 15 ms

    5) < 50 ms

    >> 5

    VCB | HVG SeriesTechnical Data 02

    Consideration of site altitude!!!If the site altitude is higher than 1000 m, dielectricstrength of the breaker will be reduced according to thealtitude. Therefore, the values of power frequencywithstand voltage and lightning impulse withstandvoltage should be selected. Rated withstand voltage according to rated voltage X k(k: Refer to Table 2-1.)

    For higher humidity, it is required to use a heater in theswitchgear to prevent dewdrops on the insulationmaterial and the consecutive decrease in dielectricstrength.


    1000 m


    X k

    (k: 2-1 .)


    Applied Altitude / 1000 m 1500 m 2000 m 2500 m 3000 m

    Correction Factor (k) / 1.0 1.05 1.1 1.15 1.2

    Table 2-1 Correction Factor as a Function of Site Altitude / 2-1

    Table 2-2 / 2-2

    24 DC48 DC60 DC110 DC125 DC220 DC110 AC220 AC











    Rate Voltage


    Operating Voltage / (V)

    Max. Min.

    Current Consumption /

    Motor Closing Solenoid Trip Solenoid

    Fig. 2-1 State of Spring Charged / 2-1



  • Technical Data 02


  • 2.9 Condenser Trip Device

    It is recommended to employ the capacitor trip unit for a

    trip operation of the breaker when the control source is

    lost in the AC control system.

    If contacts B1, B2(1.5sec delay contact) of auxiliary relay

    are connected with tripping push button as shown below,

    the breaker can be opened automatically in case of power

    failure and terminals 5, 7 can be used as AC power supply

    connecting to the motor or closing circuit.

    2.10 "Closing Spring Charge" Signal

    Using the auxiliary switches S41, S42 operated by the

    closing spring, the spring charged indicator is displayed for

    visual checking.




    Ry B1, B2(1.5sec )

    , 5, 7 closing AC



    S41, S42


    >> 7

    VCB | HVG Series

    Fig. 2-2 Arrangement of Control Jack / 2-2

    Fixed Type Control Jack / Control Jack

    Fig. 2-3 Condenser Trip Device / 2-3

    Fig. 2-4 Circuit Diagram of Condenser Trip Device / 2-4

    This device can maintain 30 seconds for the voltagewhich can trip the breaker just one time.It cannot be operated properly if used for otherpurposes or if the circuit is modufued withoutconsulting the manufacturer.


    30 .



  • Handling and Installing the Breaker 03


  • Wipe the connecting surface with a dry cloth to remove dirt

    and dust before connecting main-circuit bus-bars and earth

    terminal, and be careful not to shock the draw-out unit and


    3.5 Manual Operation

    1) Insert the hand-crank in hole and turn it clockwise until

    the indicator displays "SPRING CHARGED".

    2) Press the "ON" button. And, be sure to check that the

    breaker is closed and the ON/OFF indicator displays


    3) Press the "OFF" button. And. be sure to check that the

    breaker is opened and the ON/OFF indicator displays


    4) Operate 2~3 times as mentioned sequence.

    Finally, check that no tools and materials are left near

    the breaker.

    (Bus-bar) ,




    , spring charged indicator


    2) ON/OFF indicator

    CLOSE .

    3) ON/OFF indicator

    OPEN .

    4) 2~3 ,


    >> 9

    VCB | HVG Series

    Note Refer to our catalogue "HVG Vacuum Circuit Breaker"for mounting hole's size of the each draw-out unit and earth terminal's size.

    type mounting hole ,

    HVG Vacuum Circuit

    Breaker .

    Charged closing or tripping spring can causeserious injury.To avoid this situation, always be attentive to themechanism of sudden movement before taking anyaction on the circuit breaker. Discharge The springsand open the breakers before performing any breakermaintenance, inspection or repair.

    , .




    Fig. 3-2 Charging the Spring 3-2

    Fig. 3-3 Open Operation 3-3 Open

    Fig. 3-4 Close Operation 3-4 Close


    Manual charge handle

    Push the Open button

    Push the Close button

    Hole for Manual charge handle

  • Structure and Operation 04


  • 4.2 Closing & Opening Procedure

    1) Preparation of Closing

    To provide the necessary motive energy, the close

    spring is charged automatically by motor or by hand

    in a rotational turning action with the manual charge

    handle. As soon as the closing spring is charged, the

    crank actuates the linkage for the "CHARGED" indicator

    and at the same time. The latching device at the

    other end of the charging shaft securely locks the

    closing spring to be discharged.

    2) Closing Procedure

    The closing process is started by the mechanical closing

    button , or by the activation of closing solenoid .

    The release mechanism then permits the break shaft to

    be rotated by the charged spring . In each pole, the

    movable contact in the vacuum interrupter is moved

    upwards by the insulated coupling rod, activated by the

    cam disc and the shift lever, until the contacts touch

    each other. In the further sequence of motion, the

    compression spring is tensioned and the appropriate

    amount of contact force applied. The closing spring is

    immediately recharged after the closing procedure.

    3) Tripping Procedure

    The opening procedure is initiated by mechanical

    tripping button or by the activation of tripping

    solenoid . The release mechanism permits the break

    shaft to be turned by the spring mechanism, which is

    still sufficiently charged. The tripping spring , which is

    released by means of the cam disk and the shift lever,

    moves the contact into the open position at a very high speed.



    . SPRING




    (charging shaft)

    , (cam disc) (shift lever)

    (insulated coupling rod)

    . ,





    (break shaft)

    , (cam disk) (shift lever)


    >> 11

    VCB | HVG Series

    Fig. 4-4 Truck f