New TemPower2 Air Circuit Breakers with Built-in OCR
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- Two Steps Ahead Innovations 2008 >

It enhances ease of installation, operation, and maintenance. > Connection to the main circuit (for front connections) Connection to the control circuit Accessory fitting (Removing the front cover enables replacement of internal parts.) Manual operation The double insulated designensures that most accesso-ries can be safely and easily,installed by the user. Control, auxiliary and position switchterminals are mounted at thefront on the ACB body for easy access. Horizontal, vertical and front terminal connec-tions, can also be changed bythe user for any last minute alterations. Due to the...

֓DoubleBreak structure means the mov-ing contact is isolated from the supply voltage even whenthe ACB is reverse connected. The neutral pole of all The unique TemPower2 DoubleBreak ԓDoubleBreak ACBs are of early make/late break design.This eliminates the risk of abnormal line to neutral volt- ages, which may damage sensitive electronic equip- ment.ԓ contacts increase service life - Electricaland mechanical endurance ratings are the best avail- able, and exceed the requirements of IEC 60947-2. main contact system ensuresextremely fast interruption of short circuit currents and substantially...

This function can be used to monitor and switch on additionalpower backup to feed critical circuits. For example, the functioncan be set so that when a pre-trip alarm is activated, an emer-gency generator starts to ensure a constant supply. This fea- ture is only available on some AGR22B/31B OCR models witha generator SӔ characteristic. If the ACB is installed in the switchboard so that overcurrent release (OCR) indications are hidden to the operator, the useof this large external display allows the operator to monitor the indications. Out of phase currents, line voltages (or phase...

Why use a separate panel mounted protection relay whenyou can have all the benefits of I.D.M.T. protection integral tothe ACB? TemPower2 is available with a choice of flexible protection curvesto assist in selectivity applications. S.I. Standard InverseV.I. Very InverseE.I. Extremely Inverse > I 0.02 tItI 2 t = S.I.I All these curves are user definable and comply with IEC 60255-3.Standard transformer and generator protection characteristics are also available.AGR-L Industrial & transformer protectionAGR-S Generator protectionAGR-R Characteristics to IEC 60255-3 > 3 t = V.I.I 4 t = E.I....

Double Opening and Closing Coils provides extended controlsystem redundancy to an ACB. Double coils allow designers toimplement back-up tripping and closing systems. It provides theend user with ultimate reliability on critical UPS circuits connected to critical loads. > The unique design of TemPower2 ACBs allows for theearthing of either the busbar (line) or the circuit (load) of a low voltage system. Thus allowing system flexibility.Some other manufactures only offer one option either,busbar or circuit earthing.For full details refer to page 44 > External Relay Ensure that the ACB you...

System harmonics, in the face of increasing triple-N harmoniccurrents Terasaki have launched a range of ACBs with doubleneutrals from 800 6300Amps ֖ The AR-DNђ. Terasaki havethe widest range of double rated neutral ACBs on the global market. > TemCurve Selectivity Analysis Software is shapedaround the extensive range of Terasaki circuitbreakers, but also includes a large number of complimentary protective devices such as Highand Low Voltage Fuses to BS88/IEC269, IDMTRelays to BS142/IEC255. As a result, TemCurve can assist in protection device grading from thetransformer primary to the point...

TemPower2 provides solutions to satisfy customer needs. > Compact size for high packing density Օ No extra arc space required for clearance Low temperature dissipation Օ Built in trip supervision circuit Fully rated neutral as standard Օ Terminal connections and accessories are field changeable Uniform panel cut out size > Օ Time Current Characteristics to IEC 60255-3 Standard, Very and Extremely Inverse curves available Օ Restricted and Unrestricted ground fault protection in one relay LSI characteristic curves as standard Օ True r.m.s. protection Integral reverse power protection and load...

Phase currentPhase current I > 1 , I > 2 , I > 3 , I > N , I > g and max current Imax are measured and transmitted. Line-to-line voltage V > 12 , V > 23 and V > 31 are measured. Active powerThree-phase power and the reverse powerare measured. Demand active power Active power demand (over time) and historical max. power are recorded. Accumulated power Accumulated power is measured. Power factorCircuit power factor is measured. > FrequencyFrequency is measured. CauseWhichever trip functions, LTD, STD, INST, or GF is activated is then transmitted. Fault currentThe fault current at which the...

Main circuit terminalIsolating main contactFixed main contactMoving main contactMeasuring CTPower CT Control circuit terminalsCharging motorClosing coilClosing springArc chamberClosing mechanismMoulded insulating coverDraw-out arm 13 >

Main circuit safety shutters (See P. 18) Control circuit safety shutter (See P. 18) Position switches (See P. 19)Test jumper (See P. 18) > Mal-insertion prevention device (See P.18) Breaker fixing bolts (See P. 18)Door interlock (See P. 19)Lifting plate (See P.43)Inter-pole barrier (Note 1) (See P. 44)Automatic closing spring release (See P. 22)Earthing device (See P. 44) > Step - down transformer (See P. 21) > Pre-trip alarm, 1-channel (See P. 26)Pre-trip alarm, 2-channel (See P. 26)Ground fault trip (See P. 26) Earth leakage trip (See P. 26)Reverse power trip (See P. 26)Spring charge...

Draw-out type Fixed type > This type of ACB consists of a breaker body and a draw-outcradle. The breaker body can be moved within or removedfrom the draw-out cradle that is fixed in the switchboard. There are four breaker body positions: CONNECTED, TEST,ISOLATED, and WITHDRAWN. The switchboard panel doorcan be kept closed in the CONNECTED, TEST, and ISOLATEDpositions (shut-in three positionsӔ). This type of ACB has no draw-out cradle and is designed to bedirectly mounted in the switchboard. Terminal arrangements > Main circuit terminals Three(3) types of main circuit terminal arrangements...