Description
The REF 543 feeder terminal can be used with different kinds of switchgear, including single busbar, double busbar and duplex systems. The protection functions also support different types of networks, such as, isolated neutral networks, resonant-earthed networks and partially earthed networks. The application area also covers medium-sized three phase asynchronous motors as well as protection and control of shunt capacitor banks used for reactive power compensation. In addition to protection, measurement, control, condition monitoring and general functions, the REF 543 feeder terminals are provided with a large amount of PLC functions, which allow for several automation and sequence logic functions, needed for substation automation, to be integrated into one unit. The data communication properties include the following communication standards: SPA bus, LON bus, IEC 60870-5-103, IEC 61850 via SPA-ZC 400, Profibus DPV1 via SPA-ZC 302, DNP 3.0 and Modbus communication with higher level equipment. Further, the LON communication together with the PLC functions minimizes the need for hardwiring between the feeder terminals. Scope • Feeder protection relay Product benefits • Protection functions for many different types of power networks • Programmable logic functions (PLC) • Wide support for different communication protocols • Optical communication for fast disturbance-free communication Product features • Voltage and current measurement via conventional measuring transformers or current sensors and voltage dividers • Fault locator for short circuits in all kinds of network • Support for IEC 61850 protocol through the SPA-ZC 400 adapter • 25 binary inputs and 18 output relays
peculiarity Protect, control feeder terminals, medium measurement and supervise voltage networks. * Voltage and current measurement Ventilation measurement transformer or curve rent sensor and divider. * Fixed HMI, including large graphic display or external display soft switch mounting module. • Protection functions, including for example: non-directional and directional overcurrent earth fault protection, residual voltage, overvoltage and overvoltage protection thermal overload protection automatic recovery. • Control functions, including local and remote control sync check, status indication at bay switch object and cross lock and station level * Phase current measurements of phase and phase transitions are full of neutral voltage, neutral - current and residual voltage, frequency, power factor, active power and reactive power. * Advanced power quality measurement capabilities. Full harmonic distortion (THD) of ocean currents and the measured voltage of ocean currents. Short-term measured voltage changes such as sinking, expansion and brief interruptions.
* Condition monitoring, including circuit-breaker condition monitoring, trip circuit monitoring and internal self-monitoring transmitter stations. Time synchronization through binary input. Synthesize a timing pulse once per second or once a minute. * Various types of short-circuit fault locator networks and earth fault effective zone ears and low resistance/low reactance wireless networks. * Additional features, including synchro-check, frequency protection, capacitor bank protection and control. * Temperature RTD/ analog module measurement, current/voltage measurement - model and model output. Three communication interfaces: one for local communication with a computer and two simultaneous port communications, such as a substation communication system and a substation monitoring system.
An Analog to Digital Converter (ADC) is an electronic device used to convert an analog signal to a digital signal. It usually exists in the form of a plug-in board, which can be connected to a computer or other control system for the acquisition and conversion of analog signals. 1. Analog signal acquisition: analog digital acquisition board converts analog signals to digital signals through the built-in analog-to-digital converter (ADC). It can receive analog signals from sensors, instruments and external signal sources, such as voltage, current, temperature, pressure, etc. The acquisition board has high speed and high precision sampling performance, and can continuously measure and collect analog signals in a certain range. 2. Digital signal output: After the analog signal conversion is completed, the analog digital acquisition board will transmit the converted digital signal to the computer or control system for further processing, analysis and storage. The digital signal output can be in the form of pulse code modulation (PCM), or other common digital signal formats. 3. Multi-channel and multi-function: analog digital acquisition board usually has a multi-channel input function, which can collect multiple analog signal sources at the same time. In addition, they usually have other functions, such as voltage amplification, filtering, sampling rate selection, etc., to meet the needs of different application scenarios. 4. Communication interface: Analog digital acquisition board usually provides a variety of communication interfaces, including PCI, PCIe, USB and Ethernet, in order to connect with the computer or control system. These interfaces provide convenient data transmission and control, making the integration of the acquisition board with other devices more flexible and convenient. 5. Application: analog digital acquisition board is widely used in various fields, such as scientific research, industrial automation, data acquisition, instrumentation and so on. They can be used for various types of sensor measurements and instrument monitoring, such as temperature measurement, pressure monitoring, vibration analysis, etc. When selecting the appropriate analog and digital acquisition board, the following factors need to be considered: sampling rate, resolution, number of input channels, power supply mode, communication interface and software support. These factors will vary depending on the specific application needs.
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