I/O (Status And Alarms); Monitoring Inputs And Control Outputs - Sel -2414 Manual

I/O (Status and Alarms)

Use digital inputs to monitor critical alarms such as oil levels, pressures, and gas accumulation; they may also be used
for status points such as fans on/off and breakers open/closed, as shown in Figure 2.
Sensors
Low/High Oil Tank Level
Pressure/Vacuum Switch
Sudden Pressure #
Gas Accumulation #
Pressure Relief Device
Loss of Auxiliary Power
Fan Motor Running Timer
OLTC Remote/Local
OLTC Low/High Oil Level
OLTC Control Mode
OLTC Tap Position
Status
Fan/Pump #1 On
Fan/Pump #2 On
RTDs or TCs
(Temperature)
Ambient
Top-Oil (3 for 1)
Measured Hot-Spot
Bottom-Oil (3 for 1)
Other Cooling . . .
OLTC Tank Oil
Sensors
OLTC Tap Position
OLTC Motor Current
Load Voltage (3 for 1)
Load Current (3 for 1)
Figure 2 Monitoring Inputs and Control Outputs
Schweitzer Engineering Laboratories, Inc.
Key
Core & Coil =
Fan/Pump Bank =
On-Load Tap Changer =
SEL-2414
Transformer Monitor
SCADA and/or Local HMI Communications
3
SCADA Alarms
General Alarm
Low/High Oil Tank Level
Pressure/Vacuum Alarm
Sudden Pressure Alarm #
Gas Accumulation Alarm #
Pressure Relief Alarm
Top-Oil Alarm
Hot-Spot Alarm
Cooling Alarm
OLTC Oil Differential Alarm
# = Buchholz
Control
On/Off Fan Bank #1
On/Off Fan Bank #2
On/Off Fan Bank #3
On/Off Fan Bank #4
Transduced
Quantities
Tap Position
Top Oil Temperature
Ambient Oil Temperature
Bottom Oil Temperature
LTC Tank Oil Temperature
SEL-2414 Data Sheet