Answer / swati saxena

The term is generally used to describe relay (electrical switchgear) characteristics. IDMT relays have such tripping characteristics that, for a particular range of low values of current the tripping time varies inversely with the value of current. But beyond a certain current limit the tripping time becomes constant(definite) and causes tripping in minimum time. Hence the name Inverse/Definite Minimum Time. This type of characteristic is found in Over current Relays.

Answer / pinaki chatterjee

TO PROTECT THE SYSTEM THE TRIPPING ARRANGEMENT IS SUCH IN
THIS CASES THAT WHEN THE FAULT CURRENT WILL INCREASE THEN
THE TIME TAKEN WILL BE IN REVERSE MANNER , MEANS MUCH LESS
THAN BEFORE THAT WILL TAKEN THE TIME, IN SENCE THE NAME
IS INVERSE DEFINITE MINIMUM TIME RELAY.

Answer / najmul

it is inverse define time relay. its working to fault
measurement inversely.fault current increase to operating
time decrease.

Answer / anil

inverse defenet minimum time relay
having inverse characteristics

Answer / anil

it is a over current protection relay

what happen when dc shunt motor field is sudden open in running condition

34 Answers   APGenco, Bhel, IIT, JMRC, TCS,

---

How to convert KVA rating into HP rating?

6 Answers   AITM,

---

if voltage is not builed up in small generator what will be the reason?

7 Answers   century,

---

60 watts bulb and resistor home heater is connected in series and 230v is given to the circuit. The heater is giving some amount of heat. If instant of 60 watts bulb replace 100 watts bulb what will be the output of the heater?

2 Answers   NPCIL,

---

what is use of stater and choke in tube light.?

2 Answers   Aditya Birla,

---

---

what is meant by dielectric breakdown ? where we using HV test kit & what purpose?

3 Answers   ITC Infotech,

---

I have a 25kVA three phase transformer on our property. Will this transformer be large enough to run a large home with swimming pool, spa, 2 off full size reverse cycle air conditioners to service a 100 square house (10,000 square feet or 930 square metres)and the general power consumption of this house without upgrading to a 63kVA transformer.

1 Answers  

---

why we use four type of phase angle difference between pimary & secondry winding of a transformer & where we use them?

0 Answers   Grasim,

---

In a 11kv/433v transformer,at the LT side ie 433 V side why do we need to put 3.5 core Cable upto Panel.The full load rated Amps is 666 at LV side.What value of current will flow through the Nuetral Conductor.Why can't we use 4Core Cable instea of that?

2 Answers  

---

What is inverse definite minimum time lag relay? Where is it use?

0 Answers   TATA,

---

can anyone give an idea about dia calculation in cold rolling mill

0 Answers  

---

how to get 48 V DC I have ... 1. 12 volt power supply board 2. DC power supply ( max. 30 v) 3. 9 volt batteries ( 2 - not chargeble)

2 Answers  

---