Innovators in Protection Technology Double Breaker

Terasaki’s TemPower2 A.C.B is the result of an intensive market r e s e a rch p ro g r a m which took into account the requirements of switchboard builders, consultants and end users. TemPower2 Air Circuit Breaker is one of the smallest in the market with a 1 second rating (Icw). öBased Standards Innovations ¡The product range of the world's smallest ACBs, TemPower2 broadens with new 5000A and 6300A models. ¡A TemPower2 model with a frame size of 4000A is downsized.

Circuit Breakers

1 Features The ultimate in compactness and operational capability Icw,1s = Ics for all TemPower2 ACBs. TemPower2 TemPower2 is the world’s first “Double Break” ACB, having two breaking contacts per phase. The unique pole structure means that the short time withstand rating (Icw, 1sec) is equal to the service short-circuit breaking capacity (Ics) for all models. Full selectivity is guaranteed up to the full system fault level. TemPower2 ACBs have the world’s smallest depth resulting in space saving in switchboards. Saved space More than twenty design patents have been registered for the TemPower2...

Increased accessibility from the front 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 design ensures that most accessories can be safely and easily, installed by the user. Control, auxiliary and position switch terminals are mounted at the front on the ACB body for easy access. Horizontal, vertical and front terminal connections, can also be changed by the user for any last...

1 Features A high performance and reliability Very fast interruption by “DoubleBreak” system¶ The unique “DoubleBreak” main contact system ensures extremely fast interruption of short circuit currents and substantially reduces main contact wear. The internally symmetrical “DoubleBreak” structure means the moving contact is isolated from the supply voltage even when the ACB is reverse connected. The neutral pole of all TemPower2 ACBs are of early make/late break design. This eliminates the risk of abnormal line to neutral voltages, which may damage sensitive electronic equipment. “DoubleBreak”...

Enhanced selectivity Long time delay Short time delay At Terasaki our protection relays have ‘LSI’ characteristics as standard. This provides an adjustable time delay on overload (L) and also the l2t ramp characteristic (S). As shown, these are essential to provide selectivity when grading with other protective devices such as downstream fuses and upstream relays. The standard ‘LSI’ curve provides more than five million combinations of unique time current characteristics. Zone selective interlocking is available to provide zero time delay selectivity. As the rated breaking capacity is identical...

TemP<mer2 provides positive protection lor electric power systems. The TemPower2 series is equipped with an RMS sensing over-current release (OCR) having a wide range of protection functions and capabilities. OVER-CURRENT RELEASE OVER-CURRENT RELEASE OVER-CURRENT RELEASE Standard OCR with adjustment dial Standard OCR with LCD-'Ammeter' Enhanced OCR with LCD- 'Analyser' Overload protection Adjustable from 40-100% of rated current. True r.m.s detec- tion up to the 19th harmonic, a distant vision for the competi- tion who rarely see past the 7th. Neutral protection for all those Triple-N harmonics,...

For general feeder circuits (L-characteristic) For general feeder circuits (R-characteristic) For generator protection (S-characteristic) FOR FULL DETAILS REFER TO THE FEATURES TABLE PAGE 28-29 Two channel pre-trip alarm function (optional) Advanced L.C.D. display, Over Current Relay This function can be used to monitor and switch on additional The AGR-31B OCR comes standard with the backlit LCD dis- power backup to feed critical circuits. For example, the function play. It can monitor and indicate phase currents, voltages, power, can be set so that when a pre-trip alarm is activated, an emer-...

1 Features Optimum protective coordination Why use a separate panel mounted protection relay when you can have all the benefits of I.D.M.T. protection integral to the ACB? TemPower2 is available with a choice of flexible protection curves to assist in selectivity applications. S.I. Standard Inverse V.I. Very Inverse E.I. Extremely Inverse 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 protection AGR-S Generator protection AGR-R Characteristics to IEC 60255-3 Zone...

Double opening and closing coils Double Opening and Closing Coils provides extended control system redundancy to an ACB. Double coils allow designers to implement back-up tripping and closing systems. It provides the end user with ultimate reliability on critical UPS circuits connected to critical loads. Earthing Device The unique design of TemPower2 ACBs allows for the earthing 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...

1 Features Double Neutrals System harmonics, in the face of increasing triple-N harmonic currents Terasaki have launched a range of ACBs with double neutrals from 800 – 6300Amps – The ‘AR-DN’. Terasaki have the widest range of double rated neutral ACBs on the global market. TemCurve TemCurve Selectivity Analysis Software is shaped around the extensive range of Terasaki circuit breakers, but also includes a large number of complimentary protective devices such as High and Low Voltage Fuses to BS88/IEC60269, IDMT Relays to BS142/IEC60255. As a result, TemCurve can assist in protection device grading...