EL-311A digital feeder protection measurement and control 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 to220kVThe incoming and outgoing lines of substations, power plants, and distribution rooms with 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

※Three stage overcurrent protection (directional control, low voltage control)

※Zero sequence overcurrent protection/Alarm (directional control)

※Overload alarm

※Low cycle load shedding (with slip locking and low current locking)

※Three phase one-time reclosing (can detect no voltage and synchronous)

※Overcurrent acceleration protection (with low-voltage control)

※Low voltage protection/call the police

※Overvoltage protection/call the police

※PTWire breakage alarm

※Control fault alarm

Measurement function