ST420 Series Microcomputer Line Protection Device

ST420系列微机线路保护装置3
넳 넲

Product overview
ST420 series microcomputer line protection device is suitable for AC 380V(690V) and the following low-voltage system, the distribution, feeder line for protection, monitoring, control of a new generation of intelligent devices. The device cooperates with the plastic case type circuit breaker to improve the protection and control function of the line. The device has protection functions such as overcurrent, phase loss protection, zero sequence, leakage and external linkage, and has functions such as measurement of power grid parameters such as three-phase current, unbalanced current, zero sequence or leakage current, switching state monitoring and fault recording. The device has a standard field bus communication interface, and can also be used as a remote intelligent terminal of the monitoring and management system to realize the "four remote" function of electrical equipment.

Product Features
1, automatic calculation of zero sequence current, no need to add zero sequence transformer.
2. Optional leakage protection, plus leakage transformer.
3. The display screen adopts full Chinese liquid crystal display, which displays real-time data, parameter setting, fault alarm record and other information content.
4, a variety of protection functions, easy to return.
5, 5 switch input, one of which is an external interlocking point, can be connected to the interlocking contact or other trip contact signal.
6.4 relay outputs, convenient for users to use.
7. Built-in 4 ~ 20mA analog transmission function, transmission quantity can be arbitrarily set according to the needs of the site.
8. Record the switch displacement record and trip fault record in real time.

Function Configuration

Product Details

ꄴThe previous one： ST420M Series Intelligent Network Power Meter
ꄲThe latter one： YSA2 intelligent universal circuit breaker

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