Answer / kj

The hystersis is the difference between the voltage at
which the relay operates at and resets at.

For example the UVR is set to open the contacts at 200
volts and it can be set to close at 211.5 volts (for 230
volt sensing). This would be 5% hystersis setting.

This is to stop the relay switching on and off continuously
when the voltage is around 200 volts.

Answer / k.prakashchandra

It should have given in the manual supplied with the
relay.It seems that it is the setting for % drop in
voltage.It is important to set the time delay also.The delay
should not be less than the time taken by any CB of the
power supply system, to clear the fault to prevent tripping
on under voltage due to temporary fault anywhere in the
supply network

What is meant by stator?

0 Answers  

---

What will happen when more than one star neutral points at same voltage level are connected to earth by metallic conductor?

1 Answers   TCS,

---

why heat produced at junction of two different conductor. what care should be taken to minimize it.

11 Answers   Birla, Maihar Cement,

---

how to select correct size of power cable for inverter duty motor

0 Answers  

---

how to find motors H.P. whout any rating? (only give you a motor and multimeter)

3 Answers   L&T,

---

---

What is the phase relationship between the primary and secondary voltages of a transformer?

0 Answers  

---

in telecom we are using neutral?

1 Answers  

---

in 1-phase 230v,how in 3-phase 440v. in each phase in between 230v.

0 Answers  

---

List examples of voltage source?

0 Answers  

---

what is armature reaction?explain in simple words?and what is its infleunce on dc motor

16 Answers  

---

generaly all power generating devices is expressed in KVA or MVA then why power ststion is expressed in MW

6 Answers  

---

what are the available sizes of pin type terminal lugs in the market today?

0 Answers  

---