what is TPN
Answers were Sorted based on User's Feedback
Answer / asif mansoori
As for SFU is concerned, TPN will mean triple pole with
Neutral. For MCB, MCCBs, TPN will mean a 4Pole device with
4th Pole as Neutral. In TPN, opening & closing of the
device will open & close the Neutral. While in SFU,
Neutral doesn't automatically opens or closes as it does in
case of MCBs or MCCBs. In MCBs & MCCBs, protection is only
on Three poles & Neutral is just a isolating pole. For
application where TP MCCB or MCB is used in 3ph4wire
system, it is denoted as TP+N which will mean a three pole
device with external neutral link which can be isolated if
required.
Is This Answer Correct ? | 78 Yes | 5 No |
Answer / eknath
T.P.N. is a type of s.f.u. triple pole unit with nuetral.
Is This Answer Correct ? | 64 Yes | 5 No |
Answer / vikram singh
TPN means tripple pole + neutral....in case of MCB only, TPN
is call 4 Pole also....but in case of SDFU, MCCB, ACB etc
TPN means 3P+N, which means that 3Pole SDFU, MCCB ACB etc is
taken and nuetral busbar runs as 4th pole with it
Is This Answer Correct ? | 20 Yes | 6 No |
Answer / nick j
TP&N in Switchgear when reffering to a switch, MCCB,ACB, Disconnector means triple pole device with fixed neutral link
which Isolatable by removing the link in the neutral
4 pole means all poles of switch open when operated
Is This Answer Correct ? | 10 Yes | 5 No |
for 1000kva transformer how kvar rating is need for this PFI plant. and how does it will calculate? and Apmpere rating of main cable connection?
6 Answers Engineers India, GCC, KP, QPSL, Siemens,
Maximum efficiency occurs in electrical machines is at i)Full load,ii)50% of full load,iii)Near full load,iv)None of these
what is impedance?
how can we know cable size for a given current? if any one have catalogue plz mail to vijay_raju369@yahoo.co.in
why single core HT cable need only one side earthing?
HOW TO CALCULATE THE HEAT AND LOAD OF LT-SUBSTATION WHICH CONTAINS 2*1MVA TRANSFORMERS,LT-SWITCH BOARD,MLDB,ACB,BUSBAR,ETC,......?
Difference between single phase rotary inverter and 3 phase rotary inverter
how to calc. current for 5MVAR,50hz,33kv
What do you mean by cogeneration? What its working principle?
How shall i design a liquid rotor starter
How to connect the chemical earthing and complete process tell me plz
What is mean by discrimination of circuit breaker ?