GE Intellix MO150 intelligent, dynamic transformer

GE Intellix MO150 intelligent, dynamic transformer

INTRODUCTION

The Intellix MO150 is an intelligent, dynamic transformer monitoring system designed to provide comprehensive monitoring and interactive condition diagnostics for oil-insulated transformers used by electrical utilities and large industries.

Functionality

The Intellix MO150 system is designed to collect, process, analyze and interpret critical operations on data obtained from various sensors. It incorporates onboard intelligence, which utilizes the monitored transformer’s characteristics along with real-time measurements to automatically compute on-line state-of-the-art mathematical transformer models based on IEEE® or IEC® standards. The on-line models of the system include:

• MVA model which computes apparent power on primary, secondary or tertiary winding 

• Winding hot-spot temperature model which computes the hot-spot temperature of each winding where load current is measured 

• Moisture in the thin conductor insulation and in the barrier insulation which computes the moisture content of each 

• Insulation aging which computes aging acceleration factor from IEEE or IEC guidelines 

• Tap changer thermal model which computes temperature difference between the LTC tank and main transformer oil tank 

• Tap changer position tracking model as the tap position transitions are recorded and tracked 

• Cooling control for management and operation of the transformer cooling system 

• Cooling efficiency which monitors actual efficiency of the cooling system

Electronic Controller

Microprocessor based:

• Watchdog 

• Clock 

• Memory storage 

• More than 3700 historical alarms and events 

• More than 4900 historical service logs (once per day) 

• More than 100 days of short term logging (15 min intervals)

Components:

• Basic embedded software 

• Backlit graphic LCD display: 128 x 64 pixels; seven lines of 20 text columns 

• Membrane keypad with eight functions: up, down, left, right, escape and three interactive keys 

• Four LED indicators: power, “System OK,” Alarm One and Alarm Two 

• Internal temperature controlled

Communications:

• Local serial RS-232 link: connector type DB-9M; dielectric withstand: 1500 V RMS 

• RS-485 port 

• Remote communication via LAN and modem

Inputs and Outputs

Analog inputs:

Quantity: eight inputs, dielectric withstand: 1500 V RMS: configurable to the following two options: 

• RTD input; model PT-100; range: 0-270 Ω; accuracy: ± 0.15 Ω 

• 4-20 mA isolated input (active/passive); wetting: 24 Vdc; maximum load: 40 mA; maximum input impedance: 220 Ω; accuracy: ± 0.01 mA

AC Analog inputs:

Quantity: Five inputs, dielectric withstand: 2000 V RMS; input impedance: 150 Ω 

• Three inputs for transformer winding currents H, X and Y (clamp-on CT’s 50 mV/A) 

• Two inputs for fan group current

Environmental

• Operating temperature: -40 to +55 °C (-40 to +131 °F) 

• Storage temperature: -40 to +85 °C (-40 to +185 °F)