57
Matrix
Modules
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Overheating of the Bus-bar can reduce the life of the
insulation sleeves, Bus-bar / cables & even Breakers. Periodic
loading conditions can cause the metal to heat and cool
continuously resulting in the deterioration of the Bus-bar
material and loosening of the joints. This becomes even
more critical in case if Bus-bars consist of metals of different
heat coefficient.
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:
Any of the following reasons can lead to heat generation at
the breaker terminal
i.
Improper termination
ii. Improper Bus-bar design
iii. Loosen Joints
iv. De-rating not considered while selection of breaker
v. Eddy currents
S
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:
O
O
i.
Pick up (Tp) - 85 C to 115 C
ii. Pre alarm - 0.5Tp to 0.95Tp in the steps of 0.05Tp
iii. Delay - 0 Min to 15 Mins in Steps of 1 Min (It delays the tripping of the breaker by the set delay time.)
iv. Input supply - 24V DC (Directly at Module Terminals)
Temperature Module senses the real time temperature at the Cradle terminals and displays on the Matrix release
screen. TM module can be used to give alarm on the release or to trip the breaker with the temperature pickup
o
o
range from 85 C to 115 C, which can be configured through Matrix release.
The module is to be fitted on the Breaker and is a factory fitted option.
AS+
: Auxiliary 24V DC
AS-
: Ground
CAN- H : CAN-High
CAN- L : CAN-Low
}
CAN-H
CAN L
AS+
AS-
CAN-L
AS+
AS-
CAN H
T1-T4
connection to breaker terminals
SIC
IN
TE
R C
O
N
N
EC
TIO
N
}
?
Temperature
O
Phase1 : 45 C
O
Phase2 : 47 C
O
Phase3 : 50 C
SO
1
D
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SO
2
D
-
G
O
1
M
-G
G
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2
C
-H
SI
1
C
-L
SI
2
C
-G
G
I1 V1
G
I2 V2
A
S+ V3
A
S- V0
58
Matrix
Modules
Gout
Sout
Sin
Gin
ACB 1
S. C. Time
Delay 400 ms
ZSI
MODULE 1
ZSI
MODULE 2
ZSI
MODULE 3
Gout
Sout
Sin
Gin
Gout
Sout
Sin
Gin
ACB 2
S. C. Time
Delay 200 ms
ACB 3
S. C. Time
Delay 100 ms
X
Y
ZSI (Zone Selective Interlocking)
Using the Zone Selective Interlocking feature of the Matrix releases,
intelligence can be imparted into the electrical system for the quick
trip and isolation of the fault element of the system.
For ZSI feature, P&C units are hardwired as shown and they
communicate with each other through restraining signals. In ZSI
active mode, time delays in short circuit and earth fault are set
progressively higher towards the main incomer ACB.
In the given diagram, ACB 1 has the highest delay of 400ms for
short circuit. ACB 2 and ACB 3 are having delays 200ms, 100ms
respectively. For fault at Y, ACB3 will send restraining signal to ACBs
1 & 2 and hence pre-set delays are honored. ACB 3 will trip in 100ms
and the fault will be cleared.
ACB 2, ACB 3 will remain closed, for faults at immediate locations
like X, there will be no restraining signal from feeder breakers ACB
2, ACB 3 and hence ACB1 will Issue Trip command
immediately instead of Pre-set 400ms delay.
MTX Releases of OMEGA provides two type of options for
achieving Zone Selective Interlocking (ZSI)-
1
.
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1
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5
G
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MTX1Gi & MTX1.5Gi are having inbuilt ZSI. Wiring for ZSI to be
done directly through SICs of ZSI (available at SIC Block-6 &
marked in yellow color).When MTX1Gi /1.5Gi Releases are used in
Downstream with an External Matrix ZSI module in Upstream, an
additional 24V DC Supply needs to be connected to the SIC at
AS+/AS- of SIC Block 6.
ZSI Wiring Cable Specification and compatibility with other
Realeases & ZSI Module is mentioned in below Tables.
2
.
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5
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ZSI Module for Releases MTX3.5 & above is available as an accessory.
This module provides optional upgrade to Zone Selective
Interlocking (ZSI)
ZSI feature provides:
• Discrimination for Short-Circuit & Earth Fault protection
• CAN Bus protocol for communication in ZSI Module
• Support 20 downstream & 3 upstream Omega ACB
• Provision for self-diagnostics Test
N
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:
Input supply 24V DC, Need to be applied directly on Terminals of ZSI Module
PVC sheathed shielded twisted pair wire
7/0.2 tinned copper
Braided tinned copper ID: 4.6 max
Approx. 76 Ohm/km at 200 MHZ
Approx. 11 twists / ft.
ZSI Cable Specification
Description
Size
Shield
Impedance
No. of Twists
Re
le
as
es
in
D
ow
ns
tr
ea
m
ZSI Compatibility Chart
MTX Releases
Releases in Upstream
MTX1Gi MTX1.5Gi MTX3.5 & above
with ZSI Module
MTX1Gi
MTX1.5Gi
MTX3.5 & above
with ZSI Module
üü
üü
ü
üü
*
*
ZSI Contacts on SIC Block-6 (Marked in Yellow)
ü
Compatible
* Compatible-Additional External 24V DC Supply to be provided
at AS+/AS- of SIC Bloack-6
Содержание OMEGA
Страница 2: ...Stabilise systems with technology ...
Страница 4: ...Change course quickly ...
Страница 6: ...Match performance with prudence ...
Страница 8: ...Adopt technological brilliance ...
Страница 10: ...Keep an eye on upkeep ...
Страница 26: ...Matrix Protection Control Units T UW M X4 5 ...
Страница 70: ...Accessories ...
Страница 84: ...Control Circuit Wiring ...
Страница 92: ...Mounting Termination ...
Страница 135: ...SP 50567 R5 ...