what is the working difference b/w softstarter and
Variable frequency drive ?
- 6 Answers
- 9117 Views
- Parle, I also Faced
- E-Mail Answers
Answer Posted / ganesan_002000
Softstarter can control the motor only at the starting
time, during running time it will be by-passed! but VFD's
can be used both to start as well as to control the speed
of the motor while its running!!
| Is This Answer Correct ? | 30 Yes | 1 No |
Post New Answer View All Answers
33kv substation lay out details & line to line & line to earth measurements
What will happen if i replace a inductive proximity switch with photo sensor in a machine?
size of condotory fron voltage level
WHY MOSTLY Rph IS USED FOR CONTROL CIRCUITS AUX. SUPPLY ?
What is load boxes ?
how power is generated,and transmitted to our home..pls explain briefly in simple words.
what is the purpose of shading ring or shading coil in electrical equipments.
What type of DC motor would you see for a lift?
along with technical test papers
what are the advantage and dis-advantage of 3 phase 4 wire energy meter?
what is earthing.how we make it,describe briefly.
how can i determine the KVA/MVA rating of transformer precisely?? is there any standard test?????
A 10 MVA, 66KV, 50Hz, Y-connected 3-phase alternator has synchronous reactance of 0.635 Ù. It is working at full load at 0.8 lagging p.f. condition. Find torque angle, neglect armature resistance.
1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?
In the magnetic fluxes, what is the role of armature reaction?
