1、 Overview

The AM3SE series microcomputer protection device is a device that integrates protection and control functions, designed specifically for user terminal substations with voltage levels of 35kV and below. It can effectively achieve the protection and control tasks of user substations. Its application fields are extensive, covering multiple industries such as electricity, water conservancy, transportation, petroleum, chemical, coal, metallurgy, etc.

This protection device utilizes advanced, mature, and reliable protection principles and algorithms, with excellent anti-interference ability and high reliability. At the same time, it provides flexible and diverse protection implementation methods, and adopts redundant design in communication to ensure the stability of data transmission. In addition, the device has 11 switch quantity acquisition functions and 5 relay output functions, which can seamlessly cooperate with Acrel-2000Z power monitoring software to help build an unmanned end-user substation distribution automation system.

2、 Product Features

Mature and complete protection functions:The AM3SE series protection device has mature and complete functions, and can flexibly customize protection functions according to different primary equipment, comprehensively realizing protection and control of substations below 35kV, providing precise protection and automatic control for lines, busbars, distribution transformers, etc.

High performance software and hardware platform:Based on a high-performance hardware platform, industrial grade components are selected, professionally designed by EMC, and equipped with a complete online self checking program. Protecting the CPU with a high-performance processor, equipped with large capacity RAM and Flash, it has strong data processing, computing, and storage capabilities, and runs stably and efficiently.

Humanized operation experience:Fully localized LCD screen with intuitive and easy to understand interface; The buttons are flexible and comfortable, and the menu operation is simple and convenient; Equipped with debugging and analysis software, easy to debug and maintain.

Rich interface resources:There are 5 channels for AC current and 3 channels for AC voltage; 11 dual-purpose AC/DC switch input channels and 5 switch output channels; One RS485 communication port and one IRIG-B timing port meet diverse connection requirements.

Flexible wiring method:3-channel AC voltage input can be connected to phase, line, zero sequence or unbalanced voltage, suitable for various PT connections; The protective current can be connected to three-phase, while the other two can be connected to zero sequence, unbalanced, or line current.

Transparent operation monitoring:Real time recording of communication, input and output quantities, and protection module status, detailed recording of component action behavior, time, and waveform data, to assist in fault analysis and maintenance.

Custom switch input:Users can customize and configure switch inputs as needed to meet personalized needs.

High reliability guarantee:Through 6 electromagnetic compatibility certifications, the anti-interference level of electrical fast transient pulse group reaches level IV, with strong anti-interference and stable operation.

Open communication control:Built in Modbus RTU and IEC 60870-5-103 protocols, menu selectable, enabling remote value modification, event record upload, pressure plate remote control, etc., enhancing management convenience and intelligence.

3、 Selection guidance

4、 Typical application scenarios

4.1 substation automation

As the core equipment for line protection in substations of 110kV and below, it works in conjunction with protection devices such as main transformers, busbars, and PTs to achieve integrated management of station protection, measurement, and control.

Example: Install line protection and measurement devices inside the 10kV switchgear to monitor the status of incoming/feeder lines in real time and quickly isolate the faulty section in case of a fault.

4.2 New energy grid integration

In scenarios such as photovoltaic power plants and wind farms, solve the protection coordination problems brought by the integration of new energy into the grid (such as directional protection and reclosing strategies).

Example: When distributed photovoltaic is connected to a 10kV line, internal faults and grid faults are distinguished through directional zero sequence protection.

4.3 distribution automation

Cooperate with DTU, FTU and other equipment to achieve the automation of the "three remote" (telemetry, remote signaling, remote control) of distribution lines, and shorten the time of power outages due to faults.

Example: In urban distribution networks, fault points can be quickly located through line protection and measurement devices, automatically isolating the fault section and restoring power supply to non fault areas.

5、 Installation and wiring guidance

5.1 Overall dimensions

5.2 Installation guidance

5.3 Wiring Terminal Diagram

6、 Frequently Asked Questions and Answers

6.1 How to set the CT ratio and PT ratio of the protective device?

The protection device can set the CT ratio and PT ratio through the fixed value menu. For example, if the current transformer is 75/5 and the voltage transformer is 10/0.1, set the CT ratio to 15 and the PT ratio to 100.

6.2 How to distinguish the models of AM3SE for single line protection and transformer protection?

AM3SE is suitable for line protection and transformer protection without distinguishing between models.

When using a three-phase three wire system with 6.3 voltage, must the current be connected to 2CT?

The voltage and current wiring methods of the protective device can be independently set and freely connected.

6.4 How to confirm whether the anti bounce function is configured?

If the circuit breaker is equipped with anti tripping, the device can be equipped without anti tripping. If the circuit breaker does not have anti tripping, an AM5-FT anti tripping module needs to be configured. If DC48V is selected as the operating power supply, the anti trip box is not optional and the circuit breaker must have its own anti trip function; If using AC anti jump, please note that it is universal anti jump for both AC and DC. )

6.5 How to purchase suitable protective devices?

Before placing an order, it is recommended to consult relevant technicians, select the appropriate protection model, and then fill out the corresponding selection form. After confirmation by the technical personnel, the order can be placed.