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PCRED301006EN.book Page 8 Mardi, 19. juillet 2005 9:52 09
Circuit breaker / contactor control
ANSI code 94/69
Control and monitoring
functions
DE51204
Latching / acknolwedgment
The tripping outputs of all the protection functions and all the logic inputs may be
latched individually.
Logic outputs may not be latched. The logic outputs set up in pulse mode maintain
pulse-type operation, even when linked to latched data.
Latched data are saved in the event of a power failure.
All latched data may be acknowledged locally on the UMI, or remotely by means of
a logic input or via the communication link. The remote indication TS104 remains
present after latching operations until acknowledgment has taken place.
The "Latching / acknowledgment" function associated with the "Circuit breaker /
contactor control" function may be used to perform the ANSI 86 "Lockout relay"
function.
DE51205
TC / circuit breaker position discrepancy
MT10190
Trip circuit supervision and open / closed matching
D
A
5
O1
Description
This supervision is designed for trip circuits:
b with shunt trip units
The function detects:
v circuit continuity
v loss of supply
v mismatching of position contacts.
The function inhibits closing of the breaking device.
b with undervoltage trip units
The function detects:
v mismatching of position contacts, coil supervision being unnecessary in this case.
The information is accessible in the matrix and via the remote indication TS106.
+
_
4
M
1
I11
2
4
5
I12
Wiring for shunt trip unit.
Block diagram (1)
5
O1
4
M
+
_
D
DE52311
A
MT10191
4
This function detects a discrepancy between the last remote control order received
and the actual position of the circuit breaker.
The information is accessible via remote indication TS105.
1
I11
I12
2
4
5
Wiring for undervoltage trip unit.
(1) With MES option.
The function is activated if inputs I11 and I12 are set respectively as circuit breaker "open
position" and circuit breaker "closed position".
Open and close order supervision
Following a circuit breaker open or close order, the system checks whether, after a
2 seconds time delay, the circuit breaker has actually changed status.
If the circuit breaker status does not match the last order sent, a "Control fault"
message and remote indication TS108 are generated.
4/8
PCRED301006EN - June 2005