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Electronic Relays - Monitoring, Timing and Level Relays
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Electronic Relays - Monitoring, Timing and Level Relays
Ideal for applications such as industrial processes, power supply monitoring and level control, these series use high precision electronic circuit with noise immunity
- AutoCAD Library
- Description:
- WEG comprises three different series under the category Electronic Relays:
- Protection/Monitoring Relays (RPW series);
- Timing Relays (RTW series); and
- Level Relays (RNW series).
Manufactured in a compact frame (22.5mm) with 1 or 2 "form C" output contacts, these series are cULus listed and designed in accordance with international standards. All units utilize high precision electronic circuits with line noise immunity and are equipped with reliable LED bulbs for status indication. Units can be direct mounted in 35mm DIN rail or with screws. - Monitoring/Protection Relays - RPW:
- RPW protection relays are a competitive choice for monitoring voltage against the most common types of electrical failures. Monitoring voltages in electric installations are important for several reasons. Overvoltage, or phase loss can overheat machinery and motors, thus reducing their lifetime. Phase sequence inversion can cause machinery to run in a wrong way, then destroying the entire system; and undervoltage may occur causing machinery to run in an undefined range, which could cause some parts of a system to run properly while others cease operating.With five different functions, the RPW series are ideal to be used in electric motor control panel applications:
- RPW SF – Phase Sequence Relay;
- RPW FF – Phase Loss Relay;
- RPW FSF – Phase Sequence and Phase Loss Relay;
- RPW SS – Under and Overvoltage Relay;
- RPW PTC – Thermistor Relay.
- Timing Relays – RTW:
- Ideal for applications such as industrial processes, automation and motor starters, RTW timing relays switch an output signal based on a selected time and function. Wide setting time (from 0.2s to 150h) and voltage supply (24-240 VAC/VDC) are offered as standard for all units.RTW series are available in 8 different functions:
- RTW-RE – On-Delay
- RTW-RD – Off-Delay
- RTW-RDI – Off-Delay without Control Voltage
- RTW-PE – Impulse On
- RTW-CI – Assymmetric Flasher Start ON
- RTW-CIL – Symmetric Flasher - Start ON
- RTW-CID – Symmetric Flasher - Start OFF
- RTW-ET – Wye - Delta
- Level Relays – RNW:
- These electronic control devices enable monitoring and automatic level adjustment of an electrical current liquid conductor. Widely used in general reservoir automation, the RNW relays can also be used in several applications such as prevention of dry pump operation, monitoring against filling tank overflow, activation of solenoids or alarms/lighting. This series offers digital electronics that provide high precision, repeatability and noise resistance. The supply system is isolated from the electronic circuit, therefore ensuring greater user safety.The operating principle is based on the measuring of the electrical resistance of the reservoir liquid through electrodes that work as liquid presence/absence sensors. To optimize their performance, the relay has a sensitivity DIAL enabling the electronic circuit to be adjusted to the liquid resistance.The electrodes/probes are available in 2 versions, shaft or pendulum, and the difference between them is the assembly type.The following functions are available for the Level Relays:
- RNW EN - Filling
- RNW ES - Draining
- Certifications and Approvals
