Automatic exchange dry load box (cabinet) is mainly used in power, telecommunications and other departments and manufacturers of online high-power UPS, inverter, Switching Power Supply and diesel generator set performance testing, aging and other occasions. Unified sub-class power input, energy-consuming work mode, forced air-cooled heat dissipation, greatly ensure the reliability of constant power discharge; internal heat sink components use dry resistance, forced air-cooled heat dissipation. With new power consumption components with independent intellectual property rights production, with high power density, no red heat phenomenon, automatic overheat protection function, in the case of fan does not turn, it will not happen overheating, burning, long life safety; Modular design, simple operation, easy maintenance; can test voltage, current and other parameters according to customer requirements, and provide scientific detection methods for high-power AC power equipment.
AC dry load box main functions? Users can adjust the discharge power according to performance parameters, testing requirements.
• You can set the discharge time: Automatically turn off the load by timing.
The digital meter shows the voltage and current parameters.
The whole machine adopts a new type of power consumption component and has a protection function of overheating and automatic blocking.
? Exchange dry load box (cabinet) has a variety of specifications, complete series. Pure resistive dry load or resistive, inductive, capacitive dry load.
? With parallel function.
AC dry load box function selection? Automatic AC dry load cabinet: digital display: power, voltage, current detection value.
? Smart dry AC dry load cabinet (LED): 0.5 multi-purpose digital special instrument, detection and display: AC voltage, current, active power, power factor, frequency. RS485 microcomputer interface can be used to achieve communication with the PC.
? Intelligent dry AC load cabinet (LCD): dedicated LCD instrument display: AC voltage, current, active power, power factor, voltage frequency; and 1-40 harmonic analysis. It can communicate with PC through RS485 microcomputer interface.
RLC resistance/inductance/capacitance type automatic load cabinet is a new type of simulation load developed for experiments, aging, electrical parameter performance testing and maintenance of high-power alternating current dry load box power supply equipment such as UPS. It can simulate the start-up characteristics, stability characteristics, transient characteristics, and output parameters of pure resistive, inductive, capacitive, and mixed dry loads, as well as the output parameters testing and working process. Detects the performance of AC power when connecting to different loads. The power input adopts the optimized segmented type to meet the needs of different loads and different power factors.
â—† The AC dry load box measures basic functions such as generator, UPS steady-state three-phase voltage, current, active power, reactive power, apparent power, power factor, frequency, running time, and energy accumulation.
â—† AC dry load cabinet has harmonic analysis function, which can analyze the 2nd to 50th harmonic content and total harmonic content of voltage and current.
â—† AC dry load tester test generator, UPS setting test, fluctuation test, transient test (load sudden increase, load sudden discharge) function, can automatically test the load when the maximum, minimum voltage, current, maximum, minimum, frequency The maximum and minimum values.
â—† AC dry load cabinet adopts Chinese display of high-brightness large-screen LCD with friendly interface and simple operation.
â—† The AC dry load cabinet has a parallel function, and multiple dry load and parallel operation are realized through RS485 communication to meet the high power test required by the maximum 2400KW.
â—† AC dry load box can save 30 sets of steady state test data, 50 sets of setting test data, 50 sets of transient test data, 50 sets of wave test data and 50 sets of harmonic analysis data; users can query and delete data. Export operation.
â—† The computer can remotely control the load through the serial port, real-time data monitoring and other operations; it can also import the test data into the computer through the serial port or SD card for data, graphic analysis, and report printing.
â—† With overheat protection function, after overheating, the load will be automatically turned off, the discharge will be terminated and the alarm will prompt the user.
AC dry load box specifications AC dry load box selection principles When selecting an AC load box, the following factors must generally be considered:
1) How much power does the AC dry load cabinet require, ie how much power is needed to measure the generator set or UPS?
2) What types of AC dry load cabinets are to be used in fixed or need to move?
3) What functions does the AC dry load cabinet want to load? It only needs to do load test or multi-function, intelligent analysis;
4) The performance of the power components of the AC dry load cabinet is good, and if the temperature is too long, the temperature will not be too high and redness will occur. And the thermal stability is better, and the temperature has little effect on the resistance.
5) See whether the AC dry load is controlled manually or intelligently. Now the load box is turning to intelligent control;
6) To see if the AC dry load box is of constant power or constant resistance, there will be errors in the results of the constant resistance load box;
7) See if the AC dry load has over-voltage or under-voltage, and the phase protection function is not available;
8) See if the AC dry load box is controlled by the solid state relay and the weak current controls the strong electricity.
9) What is the minimum step of AC dry load? The most accurate one is that the minimum single-phase step of Xinsi load cabinet is 0.1KW, and most of the others are single-phase 1KW and 5KW;
10) See if the AC dry load cabinet has the function of displaying the electrical quality parameters, what parameters can be displayed, and whether dynamic parameters such as the steady-state voltage regulation rate can be calculated;
11) There is no data storage and reporting capabilities;
12) The weight of the AC dry load cabinet, the volume calls for advice.
Intelligent AC dry load cabinet can accurately test the output power and load capacity of various types of generator sets. It mainly tests all electrical parameters of the generator set including dynamic parameters. The AC load cabinet is composed of two parts: measurement and control and load cabinets, and is matched with the host computer. Use, intelligent, automatic completion of the special test of all electrical parameters of the generator set, while generating charts, curves and test reports, completely out of manual operation (intelligent control, automatic / manual optional). Intelligent AC load boxes provide scientific detection methods for high-power generator sets.
Intelligent AC dry load cabinet main features and functions
The intelligent AC dry load cabinet can measure basic functions such as generator steady-state three-phase voltage, current, active power, reactive power, apparent power, power factor, frequency and running time.
The intelligent AC dry load cabinet has harmonic analysis function, which can simultaneously analyze the 2nd to 40th harmonic content and total harmonic content of voltage and current, and the energy accumulation function.
Generator set-up test, fluctuation test, transient test (load sudden increase, dry load dump) function, can automatically test the voltage value, current value, frequency value, and recovery time when the load suddenly changes.
The intelligent AC dry load cabinet has a powerful voltage recording function, and is equipped with an optically isolated RS485/RS232 serial communication function. The serial port is powerful.
The intelligent AC dry load cabinet can not only measure all the steady state parameters, but also measure sudden increase, sudden discharge, voltage, current, frequency curve, and voltage and current harmonic curve and harmonic content.
The intelligent AC dry load box is used together with the host computer to automatically measure all the electrical parameters of the generator. Automatically generate various charts, curves, and test reports. Standardized operation, strong authority. Rich in data content, reportability, and can be based on user needs to sign, change the format.
The AC dry load box has 4 sets of load control functions, each group can control 25% of the load, and can be combined into 25%, 50%, 75%, 100% four load types or set according to the need.
AC dry load box control function, can complete the load sudden, sudden discharge function.
AC dry load boxes have the function of loading inductive or capacitive loads (designed individually according to the user's needs).
The above control can be controlled automatically by the computer and manually controlled on the panel.
The intelligent AC dry load box is equipped with three-way ambient temperature, humidity, and atmospheric pressure sensor interfaces to automatically measure, display, and upload the ambient temperature, humidity, and atmospheric pressure (users configure the sensors themselves).
Optimize the segmented power input method, easy to set up, covering all power values ​​(1kw ~ 120kw, 0.5kVA ~ 50.5 kVA).
The AC load cabinet can realize intelligent control and can automatically test various parameters of the generator set including dynamic parameters.
Automatic AC dry load cabinet: Digital meter display: power, voltage, current detection value.
Intelligent AC dry load cabinet (LED): 0.5 multi-function digital dedicated instrument, detection and display: AC voltage, current, active power, power factor, frequency. RS485 microcomputer interface can be used to achieve communication with the PC.
Intelligent AC dry load cabinet (LCD): Special LCD display: AC voltage, current, active power, power factor, voltage frequency; and 1-40 harmonic analysis. Available through RS485 microcomputer interface, and PC
The automatic AC dry load cabinet (cabinet) is mainly used in power, telecommunications and other departments and manufacturers of online high-power UPS, inverter, switching power supply and diesel generator set performance testing, aging and other occasions.
The number one-to-one correspondence with the generator simulation load box / three-phase AC dry load cabinet.
Resistive dry load cabinet, resistance load box dry load cabinet function and operation method.
Fives. Steps:
1. Step operation (1) Check if all dry load switches are in the off position (the load indicator is off)
(2) Close the fan start switch (fan indicator light), observe the wind direction, and determine the wind direction is correct.
(3) Start the load switch (the load indicator is on) and load the step switch as required.
(4) Load according to actual demand. Each time the first load switch is closed, the corresponding dry load indicator lights up.
(5) When the loading is completed, disconnect the load switch first, and the corresponding load indicator is off.
(6) Keep the fan working for 1-2 minutes to confirm that the load box is completely cooled.
(7) Disconnect the fan switch (fan indicator light goes out)
2. Sudden sudden reduction operation (1) Close the fan start switch (fan indicator light), observe the wind direction, and determine the wind direction is correct.
(2) According to the actual demand, the corresponding dry load indicator lights up each time the first load switch is closed.
(3) Start the load switch (the load indicator is on) and suddenly complete the load.
(4) Immediately after completion of the sudden step, the load switch is turned off and the abrupt step is completed.
(5) After the abrupt reduction operation is completed, keep the fan working for 2-3 minutes to confirm that the dry load box is completely cooled (6) Turn off the fan switch.
(7) It is recommended to use a separate external power supply instead of a test power supply when performing sudden load reduction dry load tests.
Note: The load box does not provide overload or overcurrent protection. Do not operate the load cabinet without ground protection. The load box must be operated with the door closed.
six. Connection between the load box and the dry load cabinet remote control cabinet 19 RV-ZR type 1mm2 wires are used to connect between the load cabinet and the load box control cabinet. The terminal arrangement is shown in the figure.
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