What does CDG,CDAG,CAG,VAJ,VAJH,VTT,VAZ,VAA etc. stands for
in case of relays and can anyone answer to decode this
codes C,V,D,G,A,X,TT,J,JH etc
Answers were Sorted based on User's Feedback
Answer / rajan singh tanwar
This is based on
very simple
concept:-
It has three
letters and they
are coded as
follows:-
First Letter -
Operation
Quantity
A - Phase angle
comparison
B - Balanced Current
C - Current (Amps)
D - Differential
E - Direction
F - Frequency
K - Rate of rise of
current
M - Manual
O - Oil Pressure
P - Poly phase VA
R - Reactive VA
S - Slip Frequency
T - Temperature
V - Potential
W - Watts
X - Reactance
Y - Admittance
(Conductance)
Z - Impedance
Second Letter -
Measurement
A - Attracted
armature
B - Buchholz
C - Induction
D - Induction Disc
G - Galvanometer
I - Transmitter
J - Mixed Types
M - Magnet
(polarized)
P - Plug
R - Rectifier
S - Synchronized
Motor
T - Transistor
W - Weight (Gravity)
Third Letter -
Application
A - Auxiliary
B - Testing
C - Carrier or
Counting
D - Directional
E - Earth/Ground
F - Plug or Alarm
Indicator
G - General or
Generator
H - Harmonic
Restricted
J - Tripping
JE - Tripping
(Electrical
Reset)
JM - Tripping
(Manual
Reset)
JS - Tripping (Self)
JC - Tripping
(Conductor)
K - Check Alarm
L - Local Limiting
M - Same Phi or
motor
N - Negative
Sequence
O - Out of Step
P - Potential
Failure
R - Re-closing
S - Synchronizing
T - Timer or
Transformer
U - Definite Time
V - Voltage
Resistant
W - Piolet Wire
WA - Interposing
WS - Inter-tripping
X - Supervisory
Y - Flash Back
(Black
Fire)
Z - Special
Application
Z0 - Zero Sequence
Examples :
CDG - Current
(operation
), Disc
(Measurement),
General Purpose(
Application)
CAG - Current
(operation
), Attracted
armature(
Measurement),
General
Purpose(Application)
VAJ - Potential
(operation
), Attracted
armature(
Measurement),
Tripping(
Application)
VTT - Potential
(operation
), Transmitter(
Measurement),
Transformer
(Application)
VAZ - Potential (
operation),
Attracted
armature
(Measurement),
Special Application
VAA - Potential (
operation),
Attracted
armature
(Measurement),
Auxiliary
(Application)
Thanks I hope it
will help you.
Rajan Singh Tanwar
J.K.Cement Ltd.
Is This Answer Correct ? | 161 Yes | 6 No |
Answer / tawumap ent
the first letter account for what is to be measured
the second letter is for the type of what causes the movement
so for the C part its for Current, for the V part its for
Voltage
The D is for disc operated. If u go and look closely on the
relays you will find an induction disc contained therein.
The other letters im going to figure out and tell you
Is This Answer Correct ? | 58 Yes | 8 No |
Answer / k.prakashchandra
To add (As I remember)a few more. A- attracted armature
(Instantaneous), G- general purpose, H- high rupturing
capacity ( heavy duty),J- master trip,T- with timer and Z -
impedance
Is This Answer Correct ? | 22 Yes | 9 No |
Answer / mithun mesta
J- Dc In comer
K- control,closing, Tripping
L- Alarm,Annunciation,
E- Potential Tranformer
H- AC supply
C- Protection Circuit
D- Metering Circuit
A- CT secondary for special protection
Is This Answer Correct ? | 16 Yes | 22 No |
What is dc current source? Differentiate between ideal and non ideal current sources?
What is a dominant pole?
What is the instrument to check the rotating diode fuse of alternator in running conditions?
What is the one main difference between ups & inverter ? And electrical engineering & electronics engineering ?
design of IGBT firing circuit for 11KV
what is the effect if we add capacitor on DG supply, it has any loss or benefit.
What are the different types of trap used for Indian & western Toilets?
What is vector group? What is meant by DYN11?Why is it needed?
13 Answers Areva, Bhel, BRG, Escorts, Fortis,
what is the function of a Master trip relay? why is it used ?
5 Answers ABB, Nissi Engineering Solution,
what is the difference between dropout fuse and horn gap fuse. how to choose between them
What is the main difference between generator and alternator
what is the practical definition for voltage