Motor Protection Circuit Breakers - Dhruva Automation & Controls.

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World class Controlgear products now in India Rockwell Automation a leader in Complete Automation worldwide brings Sprecher + Schuh a legendary Swiss brand to India. Sprecher + Schuh Low Voltage Controlgear products are also manufactured & sold in India, conforming to the strict Swiss quality and technology standards. The manufacturing in India fulfils the stringent ISO 9002 quality standards under the supervision of Rockwell Automation experts. All Sprecher + Schuh products have CE, UL, CSA conformance that correspond in every respect and meet the applicable regulations. Sprecher + Schuh’s world class products are available and supported through our nationwide network of channels. With the Rockwell Automation back-up you have the assurance of the strictest international quality, logistics, distribution and our flexible, efficient response to the market requirement any where, any time. Buy Reliability. Buy Sprecher+Schuh
Bringing about a revolution in circuit breaker technology I [kA] 80 70 60 50 40 30 20 10 0 0 1 2 3 4 5 6 7 8 9 10 t [ms] Cut-off current by KTA 3-100 Solid short-circuit current I K = 50kA eff at 400V 50Hz. The difference between type “2” and type “1” ✔ For type “2”, IEC 947 requires that the starter must remain functionally serviceable after a short-circuit switch-off. ✔ For type “1”, the contactor and overload relay may be damaged after a short-circuit switch-off. Replacement of the motor starter is usually necessary. Type “2” is therefore the better solution: ✔ Advantages of type “2”: • no reserve starter is required • rapid restoration of operation after a short-circuit switch-off. ✔ For modern facilities and controllers, type “2” is the clear solution. Unique advantages of the KTA 3 ✔ Circuit breakers type KTA 3-100 and above automatically give type “2” co-ordination in high power industrial systems. Modern and simple starter engineering ✔ Circuit breakers from KTA 3-100 upward make configuring starters significantly easier: ✔ Type “2” short-circuit co-ordinated motors can be implemented • without oversizing of the power contactors • with a minimal volume = space saving in the switching cabinet. ✔ The devices and equipment supplied are protected from damage. Lightning fast switch-off of short-circuit currents ✔ High current limitation plus extremely short switch-off times mean that short-circuit coordinated motor starters need no additional motor protector. Cost-effective and versatile to use ✔ Genuine integrated motor protection, with temperature compensation and differential release. ✔ Rapid return to operational status with no replacement parts and no device exchange after release by a short circuit. ✔ Safe operation. Type “2” co-ordination without oversized contactors Minimises contactor size for type “2” co-ordination IEC 947-4-1 type “2” short-circuit co-ordination at 400V 50Hz, 50kA Conventional switching device technology (standard circuit breaker + contactor, without thermo-relay) [A] 180 160 140 120 100 80 60 40 20 0 [kW] 0 10 20 30 40 50 60 70 80 KTA 3-25 KTA 3-100 KTA 3-160S Nom. motor current Sprecher + Schuh Conventional circuit-breaker technology Starter combinations with a KTA3-100 allow the smallest circuit-breaker to be used, avoiding expensive and bulky over-sizing
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Page 5 and 6: Product information: Circuit Breake
Page 7 and 8: Accessories: Circuit Breaker KTA 3-
Page 9 and 10: Accessories: Circuit Breakers KTA 3
Page 11 and 12: SHORT CIRCUIT CO-ORDINATION SELECTI

Motor Protection Circuit Breakers - Dhruva Automation & Controls.

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