1.6
SEL-2414 Transformer Monitor Instruction Manual Date Code 20130214
Introduction and Specifications
Applications
Single Monitor
Use a single Transformer Monitor for any of the following:
➤ Inside the control house for remote monitoring.
➤ Inside the control house for remote monitoring and remote LTC
control.
➤ Inside the transformer low-voltage compartment for local
monitoring.
➤ Inside the transformer low-voltage compartment for local
monitoring and local LTC control.
Dual Monitor
Use one Transformer Monitor inside the control house for remote monitoring and
remote LTC control. Use a second Transformer Monitor inside the transformer
low-voltage compartment for local monitoring and local LTC control.
Figure 1.2 I/O Diagram
SEL-2414
Transformer Monitor
Digital Inputs (DIs) Analog Inputs (AIs)
Digital Outputs (DOs) Analog Outputs (AOs)
Sudden Pressure #
Low/High Oil Tank Level
Fan/Pump #1 On On/Off Fan Bank #1
On/Off Fan Bank #2
RTDs or TC’s
(Temperature)
Ambient
Top-Oil (3 for 1)
Measured Hot-Spot
Bottom-Oil (3 for 1)
OLTC Low/High Oil Level
OLTC Tap Position
OLTC Remote/Local
Gas Accumulation #
# = Buchholz
SCADA Alarms
Sudden Pressure Alarm #
Low/High Oil Tank Level
Gas Accumulation Alarm #
Top-Oil Alarm
Hot-Spot Alarm
OLTC Oil Differential Alarm
Pressure/Vacuum Alarm
Pressure Relief Alarm
Cooling Alarm
Load Voltage (3 for 1)
Load Current (3 for 1)
OLTC Tank Oil
Sensors
Pressure/Vacuum Switch
Pressure Relief Device
Loss of Auxiliary Power
OLTC Control Mode
Sensors
Other Cooling . . .
OLTC Motor Current
Fan/Pump #2 On
Wire the digital outputs of sensors to the
digital inputs of the transformer monitor.
Wire digital outputs of the transformer monitor to digital inputs of
the SCADA system or to devices that need to be controlled.
Wire RTD/TC/Analog outputs of sensors to the
RTD/TC/Analog inputs of the transformer monitor.
ControlStatus
SCADA and/or Local HMI Communications
On/Off Fan Bank #3
On/Off Fan Bank #4
Fan Motor Running Timer
OLTC Tap Position
Core & Coil =
Key
Fan/Pump Bank =
On-Load Tap Changer =
General Alarm
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