Answer / vinod g

Over load relay is setting normaly at 100% of rated
current, also we can set at reduced current if load current
less and constant.Also overload relay have AUTO & MANUAL
Reset mode. ie in AUTO it get reset automatically with time
delay based on motor temprature reduction. Manual mode we
have to reset on every trip.

Answer / siva24381

First we decide motor full load amphere(or name plate) and
take actual load amphere. If 3HP motor full load amphere is
4.5A but actual load is 3.0A so we set OLR rating 3.5A.

Answer / jaspreet singh

over load relay =1.5*full load current.example for 1 h.p
motor takes 1.5 Amp current so its overload relay is setted
at approximate on 2.5 amp

A CT is marked as 10VA 0.2FS in its name plate. What is it? Where it is used?

1 Answers  

---

Which motor is suitable for mixer grinders.

12 Answers  

---

why field rhoestat is kept in minimum position while armature rheostat at maximun position?

3 Answers  

---

why do we use UPF watt meter in short circuit test of the transformer and LPF watt meter in open circuit test of the transformer

2 Answers   Bell, TCS,

---

1)Explain why the cradle guard is used on railway crossing in overhead line construction?

0 Answers  

---

---

What is the technical name of minute currents that i have been produced in moving electrical objects?

2 Answers   ITC Infotech,

---

WHAT KIND OF LIGHTENING PROTECTION SCHEMS CAN BE ADOPTED FOR THE FLAT ROOF OF BIG DIMENSION.

0 Answers  

---

What is meant by reset level of the relay?

0 Answers  

---

how pt is using

0 Answers  

---

difference between diode and scr?

2 Answers  

---

If u take a kWh reading in 11 kV HT and 440 LV side at same time in yesterday today , then why LT consumed units 3-4℅ high as compared to HT units

1 Answers   Brigade,

---

A 200 KVA UPS's load current is 70 A. We want to provide a Generator back up. What capacity of DG required for this ?

1 Answers   Reliance,

---