what is meant by twilight switches 7 where its applicable ?

0 Answers  

---

how to test vector groups in transformer differential relay.

1 Answers  

---

Why we use less dia. fuse and conductors at H.T. side, although we use higher dia. cables on L.t. side?

4 Answers   RRB,

---

What are the maximum and minimum ratings of MCB,MCCB,ACB,OCB,VCB and SF6 breakers?

2 Answers   ABB, SK E&C, Sodexo,

---

We use ungrounded DC system (220V/110V) for control and protection system in substations etc. Suppose we have long 2 core DC cables running from our DCDB in control room to the load (length of around 2 to 3 km). Do we need to protect these long DC cables from earth leakages or not? If yes how?

5 Answers   Siemens,

---

What is the theoretical reason for the size of a zig zag grounding transformer to be 1.732 times less than that of a wye-delta grounding transformer used for the same application?

0 Answers  

---

what is data block in plc ? How the values of data block are written and read by hmi ? what is the difference between function and function block ?

0 Answers  

---

If a contactor need to replace with faulty one. what I want to check?

2 Answers   Bhel,

---

ELECTRICAL MACHINE

2 Answers   Bhel, HPC, NHPC,

---

In ac circuit R,L,C are connected in series what is the output the circuit? explain

4 Answers  

---

how MW increase when steam input increase in turbine.

1 Answers  

---

What is MODBUS Controller Used for BMS Mointoring???

2 Answers   Emerson,

---