Transformer Diagnostics Monitor TDM1

Transformer Diagnostics Monitor

Introduction

Integrated diagnostic monitoring system on 110~330kV transformer insulation condition

Very easy to integrate it into existing protection systems

Monitors bushing insulation based on the sum of currents method

Monitors PD caused by bushing and transformer insulation defects

Monitors load current signals to detect critical winding deformation resulting from short circuits

Estimates an efficiency of the transformer cooling system

Noise elimination method: T-F analysis, polarity discrimination, TOA method

Two years archive of events

TDM software for Expert analysis

Features

1. Main insulation state

Monitors partial discharges in transformer insulation

Identifies defect type by correlation of partial discharges intensity and type of the revealed defect with chromatography data

2. Bushing insulation state

Monitors bushing tan delta, capacitance and conduction currents

Monitors partial discharges in HV bushings

3. Asymmetry of Phase windings impedance

Monitors the transformer neutral current indicating asymmetry in the windings impedance, which occurs when windings deformation as result of short circuit currents

4. Efficiency of Cooling system

Monitors temperature difference between the top and the bottom parts of the transformer tank along with the ambient temperature and load

System Configuration

Specifications

Operation Temp.

-30~70°C

Bushing sensor inputs

3

RFCT sensor input

1

Oil temperature sensor inputs

2, RTF Pt-100

Ambient temperature sensor input

1, RTD Pt-100

Ambient humidity sensor input

1

Load current sensor inputs

3, CT

Neutral current sensor input

1, CT

Communication interfaces

USB/RS-232/RS-485

Communication protocol

Modbus RTU

Output Relays

3(Status, Warning and Alarm)

Heater Relay

1

Power Supply

100~240VAC, 50/60Hz

Total dimension, mm

230x170x40