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On-load tap changer (On-load Tap Changer-OLTC) is a key component of on-load tap-changer, and the failure rate is up to 20%, accounting for 40% of the total fault of the on-load tap-changer. The monitoring of the on-load tap-changer is particularly important for reducing the failure rate of the transformer.
The on-load tap-changer on-line monitoring system (IED) obtains data information (current and voltage rms) from the process layer network and obtains the on-load tap-changer gear status from the on-load switch controller and records the number of operations, OLTC anomalies State (such as power failure, refused to move) and other information; the system can increase the controller to achieve on-load tap-changer on-site control and based on network control.
| Serial number | Monitoring project | Measuring range |
| 1 | Number of channels |
2 ，4，6，8 |
| 2 | Measuring range | -30℃~200℃ |
| 3 | Accuracy | 2℃ |
| 4 | Front panel display | Large1"LED display (per channel) |
| 5 | Probe signal strength read | All channels have separate signal buttons |
| 6 | Input power | Universal AC / DC [90-265VAC / DC] power supply |
| 7 | Number of relays | 6 C-type programmable cooler control and alarm set points |
| 8 | Temperature data storage | Save the temperature data for more than one year, read once every minute and keep the maximum temperature of each channel until the user is reset |
| 9 | LED alarm indicator | One for each relay |
| 10 | System fault relay | 1 type C relay |
| 11 | System fault indicator | 2 LEDs (green for good operation, red for failure) |
| 12 | Overvoltage protection | 3000V（IEEE C37.90.1．1989） |
| 13 | Connector | All ring terminal blocks |
| 14 | Operating ambient temperature | -40℃～+70℃ |
| 15 | Storage temperature | -40℃～+85℃ |
| 16 | communication | Industrial Ethernet / fiber interface, support IEC61850 |
Tel：400-8269-696
E-mail：lgjc@lgom.com.cn
