what is the purpose of vector group in a transformer ? if 2
tranaformers r connected in parallel the vector group is
same or not?
for parallel operation 2 transformers of different
manufacturers maintain same vector group or not?
Answers were Sorted based on User's Feedback
Answer / imran
There are normally four vector groups weriten on generator
name plate, DY0, DY11, DY1 and DY6. DY means delta on H.V
and Y on L.V side. the number with this means the phase
displacement between input and output. 0 means no phase
displacement, 1 means -30 degree and 11 means 30degree and
6 means 180 degree it is according to the clock
revolution.vector group must b same for parallet operation.
Is This Answer Correct ? | 14 Yes | 1 No |
Vector group of CTs is widely used in numerical relays to
compare primary and secondary currents without regard to
the circuit of the transformer
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / yusuf
Totally 36 vector groups are available
for {e.x} DYN11
D-primary delta connection
Y-secondary star connection
N-star point neutral
11-clock position[30 degree phase displacement between the pry and sec.
For synchronize two TFR vector group must be same.
Is This Answer Correct ? | 0 Yes | 0 No |
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Lux meter is the measuring device to measure the lux level of lighting fixture. in industrial sector two types of lighting fixture is being used as street lighting purpose 1. HPSV (Sodium) and 2. HPMV (Mercury). HPMV having white light which is an combination of red, blue and yellow colour, while HPSV haivng Yellow lighting. in HPSV red & blue colour will be absent. during measurement of the lux level of HPSV and HPMV fixture. 1. Lux meter can measure the actual lux level of both fixture? 2. or it will show false reading for HPSV fixture light as it has only yellow light present. please give me answer
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