CYG PRS-7367 - Page 26

Briefly Introduction
18 PRS-7367
Description
IEC 60617
ANSI
CYG Code
protection
Three phase under voltage
protection
3U<
27
27
Positive sequence undervoltage
protection
U1<
47
27P
Overfrequency protection
f>
81
81O
Underfrequency protection
f<
81
81URS
Underfrequency restore protection
-
-
81URE
Frequency gradient protection
Df/dt<>
81
81R
Auto-recloser
O ->I
79
79
Synchrocheck
SYNC
25
25SYN
Current circuit supervision
MCS 3I
MCS 3I
CTS
Fuse failure supervision
FUSEF
60
PTS
Trip circuit supervision
TCS
TCM
TCS
Current unbalance protection
dI>C
51NC-1
51NA
Three phase current unbalance
protection
3dI>C
51NC-2
51NT
Voltage unbalance protection
PQUUB
PQUUB
59NA
Three phase voltage unbalance
protection
PQUUB
PQUUB
59NT
Fault locator
FLOC
21FL
21FL
Three phase under voltage
protection of capacitor
3U<
27
CUB_27
Reverse power protection
P or Q>
32R/32O
32R
Power protection
P>
32R/32O/32U
32
Voltage Selection
/
/
/
Mechanical Protection
MP
Trip Logic
/
94
94T
Close Logic
/
/
Close Logic
Backup power automatic switch
/
/
BPAS
Wattmetric sensitive earth fault
/
/
SEF
Under current protection
/
37
37C
Block Busbar protection
/
/
Block Busbar
Gap current zero sequence voltage
protection
/
/
Gap
Restricted Earth Fault Protection
(64REF)
IdN/I
87NL
64REF
Transformer Current circuit
supervision(CTS)
/
/
TF CTS
Transformer Fuse failure
supervision(VTS)
/
/
TF VTS
Faulty Phase Selection
/
/
FPS