ST400 Series Electric Power Measurement and Control Instrument

ST400MH
넳 넲

Product overview
ST400 series power measurement and control instruments (including ST400III and ST400M/H) adopt AC sampling technology and have high-precision measurement functions such as voltage, current, power and electric energy. It supports a variety of standard fieldbus communication interfaces and can realize "four remotes" function. In cooperation with circuit breakers of low-voltage incoming lines and feeder circuits, it can realize remote operation monitoring and management of electrical equipment; through programming, the selection of "control mode" such as frame circuit breaker, molded case circuit breaker and general control can be realized respectively, and the display and query of various measurement parameters and status can be realized through liquid crystal display module.
ST400 series power measurement and control instruments are uniformly equipped with auxiliary protection functions such as grounding trip, undervoltage alarm/trip, PT disconnection alarm, overcurrent alarm, etc. to improve the protection functions of incoming and feeder circuits. In addition, ST400M/H series is also equipped with auxiliary functions of control loop disconnection alarm.

Product Features

The product adopts modular, split structure, small size, and can be directly installed and used in 1/4 modulus drawer cabinet.
The product has the measurement function of current, voltage, frequency, active power, reactive power measurement, apparent power, power factor, active energy, reactive energy and other electrical parameters, and also has the function of 4 ~ 20mA analog output.
The ST400III series has 9 switch inputs (dry contacts) and 4 relay outputs; the ST400M/H series has 8 switch inputs (wet contacts) and 4 relay outputs.
The product supports a variety of standard fieldbus communication interfaces such as Modbus-RTU, Profibus-DP, and dual Modbus-RTU;
The set parameters and power data have power-down memory function;
Through the display module real-time pop-up fault, alarm interface (which ST400MH also configure the clock function).

Function Configuration

Product Details

ꄴThe previous one： ST420B3 series microcomputer line protection device
ꄲThe latter one： ST400PC/PT series intelligent measurement and control protection device

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