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Vacuum Circuit BreakerInstruction Manual
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.
, , , , ,
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.
( catalogue )
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
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.
(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
Operating Voltage / (V)
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
Ry B1, B2(1.5sec )
, 5, 7 closing AC
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.
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
, spring charged indicator
2) ON/OFF indicator
3) ON/OFF indicator
4) 2~3 ,
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
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.
, (cam disc) (shift lever)
(insulated coupling rod)
, (cam disk) (shift lever)
VCB | HVG Series
Fig. 4-4 Truck f