PT Configuration
PT Configuration
(OP)
Have any body come across the PT configuration as shown in the attachment. I haven't seen this type of PT configuration. What configuration is this? Why is it used? Why "B" Phase is earthed?
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RE: PT Configuration
RE: PT Configuration
RE: PT Configuration
RE: PT Configuration
Could you elaborate that sentence. I failed to understand. The basic principle of PT is that it should not be short circuited to
earth. Just for Imagination, if the neutral of the secondary is not grounded and the phase is grounded, Can I imagine it like a single line to ground fault on ungrounded system.
RE: PT Configuration
RE: PT Configuration
This concept is new to me and pricking me hard. Would be grateful if you could clarify.
Under normal conditions at PT secondary , Van + Vbn + Vcn = (1∠0 + 1∠-120 + 1∠120 ) = 0 Volts,
Under control wiring fault between phase "a" and "Neutral", Van + Vbn + Vcn = (0 + 1∠-120 + 1∠120 ) = 1.732?-150.
If secondary "a" to neutral fault occurs - It means secondary "a" Phase is completely short circuited. I suppose this will prompt the primary "a" phase fuse to blow. On the other hand If the secondary "a" to ground fault occurs, this will blow the secondary "a" Phase
fuse to blow. So if any of the fuse blows, it will result in 3V0 operating 59G element.