EL-321A Digital Transformer Differential Protection Device

EL-300AThe series of digital protection and measurement devices are suitable for22OkThe protection and measurement of interval units with voltage levels below V have complete protection, measurement, control, fault recording, and communication monitoring functions, providing a complete solution for the protection and control of substations, power plants, high and low voltage distribution, and plant power systems, which can effectively ensure the safe and stable operation of high and low voltage power grids and plant power systems. All devices can be installed in a centralized manner through screen grouping, or can be installed on-site in high and low voltage switchgear. The configuration is flexible, easy to expand, the operation is simple, and the maintenance is convenient.

scope of application

apply to220kVTransformer protection for the following voltage levels. It can be centrally assembled into screens or installed on-site in the switchgear, fully supporting the comprehensive automation system of the substation.

Protection function

※Differential quick break protection

※Proportional differential protection (second harmonic blockingCTWire breakage locking)

※Heavy gas protection/call the police

※Light gas alarm

※Over Temperature Protection/call the police

※Control fault alarm

Measurement function

※Accuracy of current and voltage measurement0.2level

※Accuracy of power and electricity measurement0.5level

※frequency measurement accuracy0.01Hz