What is the criteria for deciding whther fire wall is
required between two power transformers
Answer Posted / dipak thumar
Fire wall is provided to avoid spreading of fire from one
transformer to other.
The height of the wall is to be higher(approx. 1.5 times
that of heighest trafo. ) than the height of the
transformers.
Width of the Fire wall is to be minimum 230 mm if it is
brick wall or 150 mm if it is concrete wall.
This is mendetory in india as per IE rules
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1. H1-H2 = H2-H3 H3-H1 2. H2-H3 = H3-H1 H1-H2 3. H3-H1 = H1-H2 H2-H3 For the LV side also: 4. X1-X0 = X2-X0 X3-X0 5. X2-X0 = X3-X0 X1-X0 6. X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0 H2-H0 H3-H0 X0-X1 X0-X2 X0-X3 128.0 119.9 7.2 29.2 13.3 15.8 70.7 128.4 59.2 23.4 22.0 3.6 7.2 120.1 128.1 13.4 29.3 15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?
What is meant by reset level of the relay?
How to measure current and voltage in an ELV circuit
advantages & disadvantages of Lagging and leading power factor .
why you don not show protection and type of isolation in key single line diagram?
how we calculate the dick for a pole?
how to choose cable size with respect to load? how to convert cable size in mm2 to sq.mm?
Why is ignitor used in sodium vapour lamp
What magnetic circuit is formed in berry-type constructions and why?
In constant power region of 3-phase IM torque-speed characteristics, if frequency increases flux A does not alter B decreases C increases D none of above
what is meaning of sympathetic tripping with respect to relays and give the values for current carrying capacities for copper and aluminium cables from 16sq mm to 500sq mm
what is automatic voltage regulator?we can control the vlotage by using fuzzy controller in matlab?why we go for fuzzy?
how diside ct mf exmp.200/5 ct
primery try cell?
anyone please send transformer parameter design formulas & details of tap changer ? plz i have interview this week its more helpful for me ?