1. Key models

UP818-17AN, UP818-17AI, UP818-19AN, UP818-17CN

2. Product overview

The UP818 series is an intelligent control and monitoring device specifically designed for power transformer on-load tap changers (OLTC). It integrates real-time tap position acquisition, remote regulation, and condition diagnostics to achieve precise voltage-level adjustment and dynamic optimization of transformers.

3. Functions & features

· Remote communication, telemetry and remote control of tap positions

It has the various functions of the voltage regulation control of the upward and downward movement of tap position of the on-load tap changer of the main transformer; the voltage regulation counter; The automatic conversion of tap position into analog voltage, switching signal, BCD code, etc., and it can be used for remote communication, telemetry, and remote control of remote control devices or integrated automation devices.

It can achieve on-site manual voltage regulation operation, as well as remote control of voltage regulation and telemetry of tap position.

· Flexible adaptation

Multiple telemetry and remote communication functions can be provided according to user needs.

4. Technical specifications

Scope of application: Suitable for various types and grades of on-load voltage tap changers both domestically and internationally
Counter’s counting range: 0 to 999999 times       

LED display: 1.2-inch 2-digit
Dimensions: 160 (width) x 80 (height) x 180 (depth)

Opening size:152×76 （mm）
Power supply: AC/DC110~220V ±10%
Applicable ambient temperature: -20~60 ℃ Relative humidity: 10%~91% RH
Input format: One-to-one contact

Output format: BCD encoded contact type (input/output format specified according to user needs)

5. Applications

Power systems: Main transformer oil temperature monitoring.

Overheating protection for wind/photovoltaic step-up transformers to reduce fire risks.