JKW-32D Distribution monitoring and metering terminal

I. Overview

The JKW-32 series of power distribution monitoring and metering terminals use a high-performance 32-bit microprocessor as the core device to simultaneously obtain 3-phase voltage and 3-phase current signals, and provide up to 32 control loops (the 32-loop type provides 12 loops for the terminal host. The extender provides 12 or 20 circuits). Terminal provides full diversity complement, total co-up, a total of additional points up three kinds of compensation schemes, while provide 12 capacitor bank switching method (output
encoding), the user may be controlled by modifying the parameters are selected, a total complement of the output circuit and the points The number of compensation output loops can be adjusted arbitrarily. The LCD display is used for conversational operation with the user, and the Chinese interface is
simple and easy to understand. With shortcut function keys, just click a button to complete the function switching action, which simplifies the installation and debugging work. Once the control parameters are modified, they will be saved permanently and will not be lost after power failure. Provide
Rs485 interface, which can realize four remote functions. The fundamental wave power factor and fundamental reactive power are combined to control the switching of the capacitor bank. The switching is stable without switching oscillation, and it is not sensitive to voltage, harmonic current, and harmonic interference
. It is suitable for automatic control of reactive power compensation of power system with AC 45Hz-65Hz and 0.4KV below. The distribution monitoring terminal has basic power curve data, daily freezing data and monthly freezing data.
Among them , the U-shaped terminal can be connected to a USB flash drive, and historical data can be directly imported to the USB flash drive through interface operations, and the data can be viewed on the PC side.

2. Functional characteristics
(l) Calculate the switching capacitor capacity based on the fundamental reactive power, which can avoid various forms of switching oscillations, and can correctly display the power factor of the power grid under harmonic conditions
(2) The progress of power factor measurement High and wide display range.
(3) Up to 32 loop capacitor groups can be controlled
(4) Shortcut function keyboard, large screen LED display, Chinese operation, friendly man-machine interface is still convenient
(5) All control parameters are fully digital The control is intuitive and easy to use.
(6) It has 3 working modes: automatic operation, manual operation and remote control.
(7) It has a power failure protection function, and the control parameters are not lost due to power failure.
(8) It has overvoltage, undervoltage, and turbulence Rate over-standard protection function
(9) Low current signal input impedance ≤0.01 ohm
(10) Wide range of target power factor adjustment.
(11) RS485 communication interface.
(I2) MODBUS-RTF communication protocol, the principle and concentrator or upper Machine communication.
(I3) Forced circulation function. In order to use the capacitors on the street, when a certain group of capacitors are in the state of being in the on-state, the system will use the idle equal-capacitance capacitor bank under the condition that there is no switching state after four hours of continuous operation Perform forced replacement.
(I4) Switching and switching closed top function: When switching oscillation occurs, the controller will automatically lock and cut off the capacitor bank. (I5) The power distribution monitoring final product has storage curve data, daily statistical data and Monthly statistics are based on half. The curve data is stored every half an hour, and the daily statistics are frozen at zero every day.
(I6) It is equipped with USB data collection function, as long as the U disk is inserted into the terminal with USB interface, the data can be imported through simple operations Go to the U disk and then insert the U disk into the PC to browse the historical data
(17) The controller with communication function produced by the company is equipped with free application background software (users can go to the company's website to download and install), this software can run on the state Windows-2000-xp Windows operating system, the entire software It is a graphical interface and simple to operate. Many operations can be completed by clicking the mouse. The main functions include remotely modifying control parameters, viewing control parameters, viewing power parameters, viewing capacitor bank switching status, remote switching capacitor bank, etc.

3. Technical parameters
Power supply voltage: 380V ±20%
Signal voltage: AC50V-275V (phase voltage)
Signal current AC 0-5.5A (If the sampling current is greater than 5.5A, a power factor display error will occur).
Working frequency: 45e-65Hz.
Undervoltage threshold: 176V
minimum working current (sensitivity): 50mA,
protection level: shell IP30
RS485 load strength: 32.
Energy consumption of the whole machine: <6VA.
Dimensions: length (120mm) X width (l20mm) X depth (87mm).
Installation size: physical size 112mm x 112mm, opening size 113mm x 113mm

Four, the available model description

Note: For
the controller with 32-loop output, the actual output of the machine is 12 loops, plus the online expander (12 and 20 loops), for a total of 24 and 32 loops.
For details, please refer to the following wiring diagram.

Loop expander model function description

Model Description

5. Conditions of use
(1) The altitude is not higher than 2500 meters.
(2) Ambient temperature: -20°C to +45°C.
(3) The air humidity does not exceed 50% at 40°C, and does not exceed 90% at 20°C.
(4) There is no corrosive gas, no conductive dust, and no flammable and explosive media in the surrounding environment.
(5) There is no severe vibration at the installation site.