Product description:

I. overview

AC voltage monitor is to achieve the average measurement and display instrument of AC three-phase four wire system voltage signal phase unbalance voltage under three-phase voltage monitoring and pressure, with fast response time, high stability.

1, the main features

1) can measure the average value of three-phase voltage in real time.

2, with the phase, imbalance, overvoltage, undervoltage indication, relay output and other functions.

3, with overvoltage and undervoltage critical voltage setting function, you can achieve any critical voltage you need.

4), using LED display, intuitive and clear.

2, product model:

YWD-C3U

3, the main technical indicators

The accuracy level: 1 input voltage: 0 ~ 60V 0 ~ 110V 0 ~ 220V or user-defined output: relay contact capacity: AC:220V (380V) 7A: 10V (hysteresis voltage can be set according to user requirements): DC:15V 24V 48V 110V auxiliary power supply 220V AC:110V 220V frequency voltage: input and output, input and output power with the power supply, AC: 2kV/min.1mA: ≥ 20MΩ insulation strength of power consumption: < 40mA (DC24V) digital tube display: red (3 -) working environment: temperature: -10-50 degrees: 10-90% (without dew humidity storage conditions: temperature: -40-70 degrees humidity: 10-95% (no condensation) dimensions: 110 mm × 75 mm × 120 mm;;

Two, the working state description

The LED indicator light output contact system state description of unbalanced out off balance on closed unbalanced state (a phase voltage higher or lower than the other 20% phase voltage, can be set according to user requirements) phase out off phase closed without bright open phase state (a phase voltage is lower than 40%) arc fault overvoltage no light overvoltage overvoltage condition (closed three-phase voltage average value increased 10%) under voltage arc disconnect without undervoltage undervoltage condition on closed (three-phase voltage average value decreased by 10%)

Note: when the indicator light on the table or a few bright, the output relay normally open contact closure.

Three, operating instructions

1, undervoltage threshold voltage setting mode

Set the display / set button on the panel K1 to the set position, the overvoltage / undervoltage button K2 hits the undervoltage position, the instrument enters the undervoltage critical point voltage setting mode, and the voltage displayed by the display is the voltage at the critical point. At this point, the user can set the undervoltage threshold voltage by adjusting the voltage setting knob on the panel.

2, overvoltage threshold voltage setting mode

Set the display / set button on the panel K1 to the set position, the overvoltage / undervoltage button K2 hits the overvoltage position, the instrument enters the overvoltage critical point voltage setting mode, and the voltage displayed by the display is the overvoltage critical point voltage value. At this point, the user can set the overvoltage critical point voltage by adjusting the pressure setting knob on the panel.

3, voltage measurement mode

The display / set button on the panel K1 hit the display position, the instrument into the three-phase voltage average measurement mode, the display voltage is the average of the three-phase voltage (Va+Vb+Vc) /3.

Four, wiring and installation

1, wiring and panel

2, installation

Note: the power supply of the positive and negative polarity is not connected.

A) installation environment

1, instruments should be installed in a dry, well ventilated and away from the heat source.

2), environmental temperature: - 50 DEG c..

3, the electrical connection line with 12 ~ 14 wire.

PT (b) selection

The monitor can be directly connected to the phase voltage 346V three phase four wire system. These inputs can also be used as a secondary 220V of PT. If the system voltage exceeds 346V, the PT must be used to reduce the voltage to the 220V full scale range

PT quality directly affects the accuracy of the measurement voltage, so the PT must have a good linear and interphase relationship. The introduction of PT, if the PT rated power of more than 25W, then the secondary fuse. Under the primary excitation of PT, the PT secondary can produce lethal voltages and currents. Therefore, the installation and operation of equipment, safety precautions need to be taken (remove PT insurance)

3, installation mode

DIN guide rail and screw can be used in two ways. Screw size is M4× 12.

4, installation size (bottom view)

Five, matters needing attention

1, this instrument is only suitable for three-phase four wire system.

2, after the completion of the mode setting, switch the K1 key switch to display.

3, the use of the environment should be no conductive dust and non corrosive metal and the destruction of insulating gases exist, altitude less than 2500 meters.