Characteristics

Compact & Modular design More compact overall dimensions and light weights. HITACHI ACB have been made three types of modular design creteria to facilitate their installation and integration in low voltage switch boards.

High breaking capacity

• HITACHI ACB provides high breaking capacity up to 100kA

Safety and Convenience

• OCR terminals are located in front
• Modulized mechanical part and accessories
• for easy maintenance and inspection Improved draw-out rail for easy draw-out
• Minimized arc space
• Molded frame

high functional digital type trip relay

• Easy inspection by LCD
  -Load current value
  -Setting values of each trip characteristics
  -Fault current(Max) value
  -Tripping time
• Self-diagnosis function
  -noEr : No error
  -Err-1 : NoMTD coil
  -Err-2 : Program error
  -Err-4 : Configuration resister error
  -Err-8 : Watch dog error
• Self-test function
  -It is available to check whether OCR is operated normally or not by applying external power
• Pre-alarm function
• Contact output of the each tripping cause and LED indication
• OCR alarm contact (AL,2a)

Variety of accessories

Optional accessories

• Interlock device
  -MI (Mechanical Interlock)
• Key interlock, ON-Lock (K2)
• Key lock (K1)
• ON/OFF button lock (B)
• Door Frame (DF)
• Door Interlock (DI)
• UVT, UVT controller : Standard (1NO 1NC)

• Cell switch (4C,8C)
• Shorting "b" contact (SBC, 5b max, Shorting b contact)
• Safety shutter lock (STL)
• Miss insertion prevent device (MIP)
• Condenser tripping device (CTD)
• OCR tester (OT)

Standard attachment of draw-out type

• pad lock
• Position indicator (connected, test, disconnected)
• Counter (5-digit)
• Lifting hook
• Insulating barrier
• OCR alarm contact (AL,2a)

Ratings

400A — 1600A

2000A — 5000A

Note

*1 Rated current of IEC standard
*2 Trip relay is divided into 50Hz and 60Hz. Please be careful when you order it.
*3 The generator protection relay is only available in OCR-III.
*4 For mainbody, only horizontal type is available. For cradle, vertical type is optional. In case of vertical type use of the horizontal type, the user needs to apply the vertical adapter, The vertical type is standard for 4000/500AF.
*5 For 4000/5000AF, height is 455mm

Charging method

Manual charging type

The closing coil is charged by manual charging handle. For closing, first charge the spring by using the charging handle, and then press the close button(I, ON) for closing, the open button(O, OFF) for opening When closing spring is completely charged, charge indicator indicate "Charge" It is mechanically locked not to press the close button(I, ON) and open button(O, OFF) simultaneously Contact condition of the main circuit is shown on the(O, OFF), (I, ON) indicator.

Motor charging type

The closing spring is charged by a motor ON charging method or OFF charging method is available selectively.

-OFF charging method : When the breaker is opened, the closing spring is charged automatically. It can change to ON charging method by removing b(A×b) contact like beside circuit diagram

-ON charging method : The closing spring is charged automatically when the breaker is closed.It can change to OFF charging method by using b(A×b) contact. There is a contact to indicate the charging completion(TS+, TS-). Since the contact signal of charging completion switch is connected to the external terminal, It is easy to construct a circuit(ex.Automatic closing circuit) by using that contact

• Manual charging is also available
• With the breaker closed(I, ON), only manual charging is possible(motor charging cannot be performed)
• With the open button(O, OFF) pressed, closing cannot be performed(electrical and mechanical lock)
• When OFF Lock device is in use, closing cannot be worked.(electrical and mechanical lock)
• Opening should follow at least one second after completion of charging
• Pumping prevent circuit is included with the closing coil(electrical lock)
• Please note that pumping prevent circuit can be reset when the voltage of input signal drops

Motor charging circuit

Note

*1 Since charging completion contact (TS+, TS-) terminal is for contact output power should not be allowed.
*2 Charging completion contact capacity is equal to that high of capacity of auxiliary contact in page 27.

Motor ratings

Note
*The range of operating voltage : 85-110%

Auxiliary devices

1:Pad lock(PL)

To fix a ACB into a position (Dis-connected, Test, Connected)
* Standard offer in the draw-out type

2:Position Indicator

To indicate the position (Dis-connected, Test, Connected)of a ACB
* Standard offer in the draw-out type

3:Closing Coil(CC)

• To close the breaker by remote control
• The coil only operates when the power is supplied continuously over 100ms
• Power should be supplied separately from the moer charging power.
• Electric pumping prevent circuit is built in it.

Note

*1 Closing time is from coil excitation to contact closing
*2 Steady current is the value at maximum rated voltage
*3 Please be careful that the pumping prevention circuit is reset when its voltage is under 85% of the rated voltage
*4 The extent of operation voltage is 85-110% of the rated voltage

4:Shunt coil(SHT)

• To open the breaker by remote control
• Use an auxiliary contact(INO) to prevent coil burnig
• When the control power is 'OFF' at the ACB is 'ON' state, the ACB remains 'ON'

Note
* The extent of operation voltage is 70-110% of the rated voltage.

5:OCR Alarm contact

OCR alarm contact is fundamentally installed in only ACB with trip relay.
When the ACB is tripped by the OCR operation, electrical signal flows through the OCR alarm contact for remote supervisory(INO).

Contact type

Operating condition of contact

Pumping prevent circuit

Trip coil circuit

Contact capacity