GE Multilin 345 - RTD temperature monitoring (49 T)

CHAPTER 6: SETPOINTS S6 MONITORING
345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–105
Figure 6-46: Current Demand logic diagram
RTD temperature monitoring (49T)
The 345 supports up to 12 RTD inputs from Remote Module Inputs/Outputs (RMIO).
897845A1.CDR
LED: PICKUP
Current Inputs
Phase A Current (IA)
AND
SETPOINTS
FUNCTION : Disabled Alarm Latched Alarm
OR
SETPOINTS
MEASUREMENT TYPE : Calculate Phase A CURRENT DEMAND
SETPOINTS
PICKUP: IA Demand ≥PICKUP RUN
Current Dmd1 PKP
AND AN D
Command
RESET
OR
LED: ALARM
THERMAL 90% RESPONSE TIME : TIME INTERVAL :
Phase B Current (IB)
Calculate Phase B CURRENT DEMAND
Phase C Current (IC )
Calculate Phase C CURRENT DEMAND
IB Demand ≥PICKUP RUN IC Demand ≥PICKUP RUN
OR
Current Dmd1 PKP A
Current Dmd1 PKP B Current Dmd1 PKP C
FlexLogic Operands
S
LATCH
Set-
Dominant
R
SETPOINTS
CT INPUT:
CT (W1), CT (W2)
SETPOINT
Do Not Operate, Operate
OUTPUT RELAY X
SETPOINTS
BLOCK 1: Off = 0 BLOCK 2: Off = 0 BLOCK 3: Off = 0
OR