Electrical loads from 80A to 6300A can be protected and switched with confidence as TERASAKI Air Circuit Breakers are known as the most reliable on the market. Three and four pole, fixed and withdrawable versions are of course available throughout the range to match specific requirements. These are all made in Japan.
 
Since the beginning of the production and sales of the AT type air circuit breaker, the TemPower air circuit breakers have been used for more than 10 years.
 
TemPower offers ultra high fault making and breaking capacities tested by ASTA, and approved by Lloyds Register, GL, BV, DNV and AB. When a more controllable protective characteristic is required, for close co-ordination in complex systems, why not use the most flexible microprocessor ACB relay in its class? Each standard TemPower over-current relay has over 200,000 unique time/current curves available to the user. They always detect true r.m.s. current up to the 19th harmonic.

The TERASAKI ACB offers long term cost savings for plant owners and operators over a long term. Robust construction and ease of maintenance (arcing contacts can be replaced on site, for example) mean that a TERASAKI ACB is operational after years of arduous switching and fault breaking service.

The height of draw-out models is unified at 492 mm for the frames ranging from the 630A to 2000A and at 526 mm for the models ranging from the 2500A to 4000A.The depth of all the models is unified at 458 mm. The r.m.s. sensing type multifunctional overcurrent tripping relay and other various accessories are available to meet customers' diverse requirements.

 

TemPower ratings standard range

TYPE

AT06

AT12

AT16

AT20

AT25

AT32

AT40

AMPERE RATING (A)

630

1250

1600

2000

2500

3200

4000

NUMBER OF POLES

3.4

RATED INSULATION VOLTAGE [Ui]

1000V AC

RATED OPERATIONAL VOLTAGE [Ue]

690V AC

RATED CURRENT (max.) [In] (A)

IEC

630

1250

1600

2000

2500

3200

4000

BREAKING CAP. (kA sym. rms) / MAKING CAP. (kA peak)

With INST IEC

690V AC

22/46.2

50/105

50/105

50/105

500V AC

35/73.5

65/143

65/143

85/187

SHORT TIME CURRENT [Icw]

1sec

35

50

50

50

65

80

3sec

30

45

45

50

50

65

IMPULSE WITHSTAND VOLTAGE [Uimp]

8kV

LATCHING CURRENT (kA)

35

50

50

65

TOTAL BREAKING TIME (sec.)

0.05

TOTAL CLOSING TIME (sec.)

0.06

OUTLINE
DIMENSION
DRAW-OUT TYPE (mm)

W 3P/4P

368/453

458/573

518/653

H

492

526

D(1)

458

Note(1) : Not including main circuit terminals
 
Type AOR-1B Over-current release for TemPower

The Model AOR-1B over-current tripping relay mounted on the TemPower uses the r.m.s. sensing method to prevent any malfunction from occurring due to harmonics. It also provides various overload protection characteristics such as the hot start characteristics to prevent abnormal overheating of load equipment, and the N-phase protection function to protect the electric lines of the N-phase from distorted current. In addition, the AOR-1B has sufficient discrimination and protective coordination characteristics including ultra-inverse-time characteristics IT and IT and ramp characteristics.
Type AOR-1B is an 8-bit microprocessor controlled RMS sensing over- current release, and the following protection function can be selected.
  • Adjustable Long Time-delay
  • Adjustable Short Time-delay
  • Adjustable Instantaneous Trip (or MCR function)
  • Adjustable Pre-Trip Alarm
  • Adjustable Ground Fault
  • Neutral Phase Protection
  • Trip Indication (out-put contacts only or LED indication + out-put contacts)
  • Current monitoring function
  • Field tests facility

    All ACBs in regular stock provides:

  • Manual Stored Energy & Fixed Mounting Type
  • With Multi-Function Overcurrent Tripping Device providing
  • Adjustable Long Time Delay (Overload Protection)
  • Adjustable Short Time Delay (Discrimination Protection)
  • Adjustable Instantaneous (Short Circuit Protection) & Pre-trip Alarm
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