● A complete set of protection, related to the application;
● 4 current input, 4 voltage input, 12DI, 5DO;
● Auxiliary power supply adapts with AC220V, DC220V, DC110V, AC110V;
● 1 RS485 serial communication, IEC60870-5-103 and Modbus-RTU;
● 1 RS232 for user update;
● More than 200 sequence of event records, more than 400 system logs, and more than 10 seconds tripping context records;
● Powerful graphic programmable Logic.
Overview
AM4 series microcomputer protection device are applicable to the user substation which the input voltage is 35kv or above. AM4 can be used to protect and control the user substation, and is be widely used to Power Industry, Water conservancy industry, Traffic Industry, Oil industry, Chemical industry, Coal Industry, Metallurgical Industry and so on. The advanced and reliable protection principles and algorithms are used in AM4, and AM4 series protection devices have so many advantages such as anti-jamming performance, high reliability, flexible way to achieve protection, communication uses redundancy design. The device has ample hardware interfaces, such as 12 DI、 5 DO、8AI and so on. The AM4 can be used to communicate with The Acrel-2000 power monitoring system to support Unattended substation system.LCD Display
Dimension
Wiring
Connection
| Application TypeFunction | Current type | Voltage type |
| AM4-I | AM4-U1 | |
| Input Current | 4 | 0 |
| Input Current | 4 | 4 |
| DI | 12 | 12 |
| DO | 5 | 5 |
| Protective Function | ||
| over current protection(three stage, inverse time ) | √ | |
| Over zero-current protection(two stage, inverse time) | √ | |
| Negative sequence over-current(two stage, inverse time) | √ | |
| Reclose | √ | |
| Overload trip/alarm | √ | |
| Low-frequency load shedding | √ | |
| After accelerating over-current | √ | |
| Over voltage trip | √ | |
| Under voltage trip | √ | |
| FC闭锁 FC Block | √ | |
| Control circuit fault alarm | √ | |
| Non electric trip/alarm | √ | |
| Under voltage alarm | √ | √ |
| Over voltage alarm | √ | √ |
| Over zero-voltage alarm | √ | √ |
| PT disconnection alarm | √ | √ |
| Self-produced over zero-voltage alarm | √ | |
| Communication protocol | ||
| ModBus-RTU | √ | √ |
| IEC60870-5-103 | √ | √ |
| Accessibility | ||
| Fault recording | √ | |
