Answer / zan

A lock-out relay is generally placed in line before or
after the e-stop switch so the power can be shut off at one
central location. This relay is powered by the same
electrical source as the control power and is operated by a
key lock switch. The relay itself may have up to 24 contact
points within the unit itself. This allows the control
power for multiple machines to be locked out by the turn of
a single key switch.

Answer / mohammad irfan

Basically it is Master Trip Relay, it takes signal from all the relays and finally trips the breaker.

which motor is used in electric train...???????

27 Answers   ESPL, IOCL,

---

i have completed deee and i've (June2012-feb 2015 experience in electrical maintenance in pvt ltd company.company having HT & LT electrical power.how to apply electrical C-license ,NOW I was resigned my job,what are requirements of applying for c-license

0 Answers  

---

Which. Type of motor used in. Fan

10 Answers   Bajaj, HCL,

---

What is the importance of RESONANCE

2 Answers  

---

in a refinery one motor is suddenly stoped. what will do how can i findout the problem explain step by step

2 Answers  

---

---

What is the difference between Welding Transformer and Normal Transformer?.

2 Answers   DAE,

---

How will you determine the rating of a motor for continuous duty variable load motor applications?

1 Answers  

---

WHY IS THE NO LOAD CURRENT SMALL FOR A TRANSFORMER COMPARED TO OTHER ROTATING ELECTRICAL MACHINES??

1 Answers  

---

what is automatic voltage regulator and it is used?

2 Answers   HAL,

---

In transformer how measure the winding temperature ?

5 Answers  

---

what do you know about SERVOMOTOR

4 Answers  

---

what is the best transformer oil breakdown voltage?

0 Answers  

---