Ametek UPLC-II System Manual page 71

Internal Line Up
a) Normal Internal Fault
External Line Up
b) External Fault
Internal Line Up
c) Internal Fault with Outfeed (Comparison at Strong Terminal)
Figure 3–16. Response of Segregated Phase Comparison
January 2016
G
F
Local Positive
Local Negative
1
Local Positive
0
1
Local Negative
0
Trip Positive
Trip Negative
Trip Coincidence
Shaded Portion is
Remote Square Wave
Trip Coincidence
G
Local Positive
Local Negative
1
Local Positive
0
1
Local Negative
0
Trip Positive
Trip Negative
Trip Coincidence: None
Remote Square Wave
G
F
Local Positive
Local Negative
1
Local Positive
0
1
Local Negative
0
Trip Positive
Trip Negative
Trip Coincidence
Remote Square Wave Shaded Portion is
Trip Coincidence
System with Offset Keying
Chapter 3. applications
H
Keying
Square
Trip Positive Wave
Trip Negative
Note:
Similar Comparison Occurs
at Terminal H.
H
F
I Key
Note:
Local Square
Waves "Nest" within
Remote Square Wave
Keying
to Provide Security
Square
Trip Positive
Wave
Trip Negative
Note:
Similar Comparison Occurs
at Terminal H.
H
I Key
Trip Positive
Trip Negative
Keying Square Wave is
Steady Trip Negative
Note:
Similar Comparison Occurs
at Terminal H.
3
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