Answer / sanskar

Difference between Buchholz Relay and Oil Surge Realy:
Generally there is confusion between operation of Buchholz relay and Oil surge relay.

So, Let me interpret the major differences between them.

Buchholz Relay
Oil Surge Realy
Buchholz relay is used for protection of oil filled transformers/reactors fitted with conservators against low oil level and internal faults.
OSR is used to report any malfunction developed inside the On Load Tap Changer Chamber.
Buchholz relay is Gas actuated Relay.
OSR is Oil actuated Relay.
Buchholz relay should be mounted in the connecting pipe between the transformer and conservator tank.
OSR is installed in the pipe between OLTC head and the oil conservator.
Buchholz relay is actuated by the gases flowing through and accumulated in relay.
OSR relay is actuated when the flow rate of oil exceeds the preset value.
Buchholz relay detects the fall in oil level due to formation of gases after any internal fault inside the transformer.
OSR detects excessive oil surge after any fault occurs inside OLTC Chamber.

difference between analog pressure gauge & digital pressure gauge?

1 Answers  

---

What is the deffirant between EARTH, GROUND AND NUTRAL

4 Answers  

---

what is errection pcbs?

0 Answers  

---

what is meant by form factor and hoe related with the HT transmission voltage

2 Answers  

---

Hi all, please could anybody give me a suggestion about Electrical designs and calculations .. what text book should i follow as i am a trainee engineer and here work going not so favorable to me so please help me friends .. A small discription about my work which is going here is all about Electrical designs like cable sizing, lighting, lightning, Gensets sizing, motor sizing, transformer sizing, generator sizing, circuit breakers, PDB MCC PCC SLDB MLDB panels, Single line diagrams mainly, substation desings, cable routing and layouts, reactive power compensations, power factor improvement, voltage drop calculations, power generations, power transmission, power distributions all calculations i need .. please please if anybody experienced with this problem and got a solution then please help me .. just i need an apt text book for these all calculations and designs ..

0 Answers  

---

how to calculate the battery AH

0 Answers   Turbo,

---

The efficiency of a 100kva transformer is 0.98 at full load as well as half load , for this transformer what is the Copper loss at full load ?

0 Answers  

---

How can we calculate the Rating of DG Set for a 4 kw motor?

3 Answers  

---

What is the difference between PLC & DCS?

1 Answers   Power Plant,

---

Compare jfet’s and mosfet’s.

0 Answers  

---

What is the permissible sound level for 1000kva DG set and how the sound level is calculated.

1 Answers  

---

how choose conductor&depending upon load

0 Answers   Ford, HCL,

---