Answer Posted / prameela bhukya

under light load condition or stable condition torque is proportional to slip.under unstable condition inverselyproportionalto the slip

sir i applied for hpcl(electrical).i want to know from which subjects most of the technical que will b asked.and pattern of the written test.pls help me

1562

---

I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

1670

---

What are the various types of rotor used in the alternators?

711

---

WHAT R THE SAFETIES IN A HIGH TENSION PANEL N LOW TENSION PANEL. ALSO WAT SAFETIES R THERE IN A 200 KVA TRANSFORMER?

1911

---

Draw a block diagramof Three UPS systems connected in Parallel mode?

1789

---

---

WHY IL=IPH IN STAR AND WHY IPH=IL/1.732 IN DELTA? WHAT IS REASON BEHIND IT?

5723

---

In a synchronous motor. if start is running at high speed.  What will be the starting torque : Higher Lower Zero

1341

---

Pls mail me utility & Dg related question with answer

1491

---

Different STANDARDS (BS, IS, IEC etc) gives different informations on CT specification. How they correspons w r t each other (i.e I mean to say BS provides "knee point voltage" but IS does not, then how can i select CT)

1602

---

Its possible to use 3core 2R of 240 sq.mm cable for 3phases & separely 50sq.mm 3core cable fully for Neutral for connection of PCC to MCC 3ph..4wire system?

1798

---

neutral earth resistance testing is it possible for transformer while in load condition

1541

---

why to use freewheeling diode ( diode in revers bias mode) across dc coil

4063

---

how to setting Load amps tripping time and extra settings for load Transformer protection relay with RMU panel using C&S model relay..?

696

---

There is any especial requirement for motor to drive through with VFD?

2260

---

WHAT ARE THE CHARACTERISTICS OF AN VOLTAG AMPLIFIER

1675

---