L&T Electrical & Automation OMEGA, Руководство пользователя

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53
Matrix
Modules
OP1 OP2 OP3 OP4
CAN-H
CAN-L
AS+
AS-
C
A
N
C
O
M
M
U
N
IC
A
TIO
N
B
U
S
4 RELAY O/PS 4 RELAY O/PS
SIC
IN
TE
R C
O
N
N
EC
TIO
N
OP1 OP2 OP3 OP4 OP1 OP2 OP3 OP4
RJ
4
5 C
A
BL
E
OP1 OP2 OP3 OP4
4 RELAY O/PS 4 RELAY O/PS
i. Overload vii. Phase sequence
ii. Short circuit viii. Under voltage
iii. Instantaneous ix. Over voltage
iv. Earth fault x. Under frequency
v. Neutral overload xi. MD (Active)
vi. Reverse power xii. Breaker operation
R E L A Y M O D U L E
Relay module helps in remote annunciation, interlocking and load management of the system. Relay module consists
of four configurable O/Ps (2NO & 2 Changeover) which can be programmed through the release on any of the
following protection:
Each of the above protection can be programmed for “Trip” mode or
“Alarm” mode (Breaker operation can be programmed for breaker
ON or breaker OFF mode).
Relay module can also be used for switching off the non-critical loads
during the Overload condition so as to prevent the complete
shutdown of the system.
Four relay modules can be looped together to one release at a time.
Each relay module node address can be set using the dip switches on
the module.
R e l a y
m o d u l e
R a t i n g c o n t a c t
( 4 c o n t a c t s p e r
r e l a y m o d u l e )
R e l a y o u t p u t
a s s i g n e d i n
M a t r i x u n i t
240VAC/24V DC, 6A
240VAC/24V DC, 6A
240VAC/24V DC, 6A
240VAC/24V DC, 6A
70-73
80-83
90-93
A0-A3
Relay 1
Relay 2
Relay 3
Relay 4
54
Matrix
Modules
R E S T R I C T E D E A R T H F A U L T ( R E F ) M O D U L E
REF protection is usually applied for star winding of Transformer & Generator. Special protection class CTs i.e. Class
PS CTs are to be used for achieving the protection. Protection works on differential principle.
REF protection is used to detect and to trip the breaker in the selected zone only i.e. secondary winding of the
transformer/generator.
If transformer star node is further used as a neutral in the system, the 5th CT (T5) should be used to avoid the nuisance
tripping during the unbalance condition.
During the unbalanced load condition the unbalanced current will flow back through neutral. As the direction of the neutral current is in
opposite direction as that of phases, the REF relay will not give nuisance tripping on current unbalance.
In absence of the 5th CT, the breaker will not be able to sense the unbalance condition flowing through the neutral and relay may give trip
command.
Ir+Iy+Ib+In
P1 T1
P2
R
N
Y
B
P2
P2
P2
P1
P1
P1
T5
T2
T3
Id=0
Ir+Iy+Ib+In
P1
P2
T4
mer
Sec of X /
Generator
winding
Ir+Iy+Ib+In
REF
Trip command to
VCB at Primary side
or Generator Relay