Product Overview

The device provides a comprehensive transformer protection configuration centered on differential protection, covering main protection functions such as differential instantaneous overcurrent protection and percentage differential protection. It also integrates backup protection functions including phase-to-phase overcurrent protection, negative-sequence overcurrent protection, overload protection on both the high and low voltage sides, as well as zero-sequence overcurrent protection and zero-sequence overvoltage protection. In addition, the device features auxiliary control functions such as blocked tap changer and fan start on the high voltage side, along with binary input protection, meeting the protection requirements of transformers under various operating conditions.

Protection Functions

The device provides a comprehensive series of protection functions covering all aspects of the transformer. In addition, the device features auxiliary control functions such as blocked tap changer and fan start on the high voltage side, along other protection capabilities using binary input, meeting the protection requirements of transformers under various operating conditions.

Control Functions

The device supports local and remote control operations, meeting the requirements of unmanned and smart substations. The main control functions include local/remote open and close operations, remote setting modification, remote protection enabling/disabling, and programmable protection/signal output configuration. The device also supports CT power harvesting and split trip functions for specific application scenarios.

Application Scenario

Two-winding transformers at voltage levels of 35 kV and below

10kV-35kV power transformation facilities