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UT IEEE C 37.94 Figure 2: Transmission time delay for ABB make RED 670 relay
This is a standard for N times 64 Kilobit Per Second Optical OPERATIONAL CHECKING
Fiber Interfaces
➤ Patuli SS and Park Circus SS were selected for
➤ BetweenTele-protection and Multiplexer Equipment. operational checking of two spare line differential
➤ The standard defines a data frame format for optical relays. These two substations serve as the two
ends of the line protected with the line differential
interconnection, and reference standards for the protection.
physical connector for multi-mode optical fiber.
➤ It can be used to interface to distance based and ➤ Firstly, ABB make line differential relay (RED 670)
current differential protection relays. with IEEE C37.94 standard was used for operational
➤ The IEEE C37.94 standard defines the rules to checking.
interconnect tele-protection and multiplexer devices
from different manufacturers using optical fibers. ➤ IEEE C37.94 communication card was inserted into
ABB make FOX Optical Fiber Communication (SDH)
Advantages of IEEE C 37.94 panels installed at Patuli SS and Park Circus SS.
➤ Instead of using dedicated fibers for the ➤ Multi-mode Fiber Optic Patch cords were used
communication channel for line differential protection, between SDH panels and relays at either ends.
two redundant communication paths can be defined
for the communication channel which will capability
to automatically & instantly switch to backup path
in case the communication over main path fails, this
feature makes the protection system more reliable.
Disadvantages of IEEE C 37.94
➤ Cost of installation of MUX unit with IEEE C37.94 will
be higher.
➤ Transmission delay for the protection interface will
be more than direct fiber.
Architecture Architecture:
RELAY RELAY
PLACED PLACED
AT PATULI AT PARK
CIRCUS SS
SS
MULTI MULTI
MODE MODE
FO FO
SINGLE
MODE FO
SDH AT FOX
PATULISS 615 AT
PARK
(MUX) CIR. SS
FigFuigre3:3A: rAchrcitheictetucrteuroef oLfinLeinDeifDfeiffreenrteinaltiparloptreoctteiocntiounsiungsinIEgEIEEECE3C73.974.94
Patuli WORKING AUCKLAND Park
S/S circus
PATH 71
S/S
JAD CAL SOUTH
This is a standard for N times 64 Kilobit Per Second Optical OPERATIONAL CHECKING
Fiber Interfaces
➤ Patuli SS and Park Circus SS were selected for
➤ BetweenTele-protection and Multiplexer Equipment. operational checking of two spare line differential
➤ The standard defines a data frame format for optical relays. These two substations serve as the two
ends of the line protected with the line differential
interconnection, and reference standards for the protection.
physical connector for multi-mode optical fiber.
➤ It can be used to interface to distance based and ➤ Firstly, ABB make line differential relay (RED 670)
current differential protection relays. with IEEE C37.94 standard was used for operational
➤ The IEEE C37.94 standard defines the rules to checking.
interconnect tele-protection and multiplexer devices
from different manufacturers using optical fibers. ➤ IEEE C37.94 communication card was inserted into
ABB make FOX Optical Fiber Communication (SDH)
Advantages of IEEE C 37.94 panels installed at Patuli SS and Park Circus SS.
➤ Instead of using dedicated fibers for the ➤ Multi-mode Fiber Optic Patch cords were used
communication channel for line differential protection, between SDH panels and relays at either ends.
two redundant communication paths can be defined
for the communication channel which will capability
to automatically & instantly switch to backup path
in case the communication over main path fails, this
feature makes the protection system more reliable.
Disadvantages of IEEE C 37.94
➤ Cost of installation of MUX unit with IEEE C37.94 will
be higher.
➤ Transmission delay for the protection interface will
be more than direct fiber.
Architecture Architecture:
RELAY RELAY
PLACED PLACED
AT PATULI AT PARK
CIRCUS SS
SS
MULTI MULTI
MODE MODE
FO FO
SINGLE
MODE FO
SDH AT FOX
PATULISS 615 AT
PARK
(MUX) CIR. SS
FigFuigre3:3A: rAchrcitheictetucrteuroef oLfinLeinDeifDfeiffreenrteinaltiparloptreoctteiocntiounsiungsinIEgEIEEECE3C73.974.94
Patuli WORKING AUCKLAND Park
S/S circus
PATH 71
S/S
JAD CAL SOUTH
