Rrtd Inputs - GE M60 Instruction Manual

CHAPTER 5: SETTINGS
— Allows securing trip signal by voting with other RTDs. A value of "None" indicates that element
RTD INPUT H1 TRIP VOTING
operates individually and no voting takes place.
A value of "Group" indicates that element is allowed to issue a trip if N – 1 of other RTDs of the same group pick up as well
(where N is the number of enabled RTDs from the group). For example, if three RTDs are assigned to the same group, there
needs to be at least one additional RTD of the same group picked up to issue a trip command.
The "RTD Inp H1" through "RTD Inp W8" values indicate that element is allowed to issue a trip if the corresponding peer RTD
is also picked up.
— Allows monitoring of an open RTD sensor circuit. If this functionality is not required, then a value of
RTD INPUT H1 OPEN
"None" disables monitoring and assertion of output operands. If set to "Alarm", the monitor sets an alarm when a broken
sensor is detected. If set to "Block," the monitor sets an alarm and simultaneously blocks RTD operation when a broken
sensor is detected.
If targets are enabled, a message appears on the display identifying the broken RTD. If this feature is used, it is
recommended that the alarm be programmed as latched so that intermittent RTDs are detected and corrective action can
be taken.
— This setting is used to block RTD operation.
RTD INPUT H1 BLOCK
SETTINGS
RTD INPUT H1 FUNCTION
= Enabled
AND
RTD INPUT H1 BLOCK
Off = 0
SETTINGS
RTD INPUT H1 ID
= RTD Inp H1
RTD INPUT H1 TYPE
Resistance to
temperature conversion
SETTING
RTD INPUT H1 OPEN
RUN
R 250°C ³
RUN
R –50°C £

5.10.3 RRTD inputs

5.10.3.1 Menu
SETTINGS  TRANSDUCER I/O  RRTD INPUTS
 RRTD INPUTS

Menus are available to configure each of the remote RTDs.
It is recommended to use the M60 to configure the RRTD parameters. If the RRTDPC software is used to change the RRTD
settings directly (the application and type settings), then one of the following two operations is required for changes to be
reflected in the M60:
• Cycle power to the M60
• Break then re-establish the communication link between the RRTD unit and the M60. This causes the RRTD COMM FAIL
operand to be asserted then de-asserted.
M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 5-156: RTD input protection logic
SETTINGS
RTD INPUT H1 TRIP
TEMPERATURE
RTD INPUT H1 ALARM
TEMPERATURE
RUN
temperature > TRIP PICKUP
RUN
AND
temperature > ALARM PICKUP
Block
Alarm
OR
None
 RRTD 1



 RRTD 12


TRANSDUCER INPUTS/OUTPUTS
SETTINGS
RTD INPUT H1 TRIP
PKP DELAY SETTINGS
RTD INPUT H1
RTD INPUT H1 TRIP
RST DELAY APPLICATION
RTD INPUT H1 TRIP
RTD INPUT H1 ALARM
VOTING
PKP DELAY
T
PKP
Voting logic
T
DPO
T
PKP
From other RTDs for voting
0
See below
To other RTDs for voting
5
FLEXLOGIC OPERAND
RTD Ip TRIP OP
FLEXLOGIC OPERANDS
RTD Ip ALARM OP
RTD Ip TRIP PKP
RTD Ip TRIP DPO
RTD Ip ALARM PKP
RTD Ip ALARM DPO
RTD Ip OPEN
RTD Ip SHORTED
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