Hello friends, Can anyone explain the concept of zones in Bus bar protection and how can we differentiate the main zone and check zone in Bus bar protection

1 Answers   ABB, NCC,

---

pls tell me function of closing coil of A.C.B.

0 Answers  

---

what is electricity

3 Answers   APGenco,

---

What are the types of instrument transformer?

0 Answers  

---

WHAT IS DOL STARTER? HOW IT WORK? GIVE ITS CONTROL AND POWER DIAGRAM .

0 Answers   Bhel,

---

How to calculate D.C load current?

3 Answers  

---

why we use CVT (capacitive voltage transformer)in switch yard?

5 Answers  

---

What is the electrical difference between Earthing Switch (ES) and Maintenance Earthing Switch (MES)?

1 Answers  

---

Recently we had experienced following problem All RCCB breakers (connected to the load as well as spares) connected to various UPS systems at various floors at a high rise building tripped during a power break down and upon starting up of generator.This Generator is recently inducted into the installation. Can any one explain the reason behind this tripping. Regards Viswanathan

1 Answers  

---

what happenes if two voltage source connected in parallel will be connected to load.

3 Answers   Efftronics Systems,

---

What is the principle of HIGH SPEED DIRECT DRIVE MOTOR ?

0 Answers   Honeywell,

---

why the power cut problems occur in tamil nadu? may i know the exact reason.plz

17 Answers  

---