Body. Programmable load box AC load box load box
Body. 1. Main functions of anti-islanding analog load products
Three-phase resistive loading power, inductive loading power, and capacitive loading power are directly and independently displayed. AC resonance point symptoms are displayed directly on the panel. There will be an indicator light to prompt when the load is loaded accurately.
The minimum standard power of the built-in resistive load, inductive load and capacitive load is continuously adjustable in step amplitude, which can accurately simulate the occurrence of AC resonance and meet the detection needs of the inverter's anti-islanding protection function.
The resistive load uses alloy resistance elements, and the test process will not cause thermal drift changes in the impedance value due to the heating of the resistive load elements.
The built-in inductor adopts a magnetic circuit type controllable load inductance load element, which meets the power adjustment requirements under line voltage/(phase voltage/) working conditions, and ensures that the inductor impedance power will not change during long-term loading tests.
The built-in capacitor uses standard capacitive components, which meet the power adjustment requirements under line voltage/working conditions, and the capacitive impedance power will not change during long-term loading tests.
Each branch of the built-in capacitive load must be equipped with a special anti-short circuit protection circuit module to prevent the capacitor element from being short-circuited and burning the host during the test process and the moment the loading switch is closed.
The power of three-phase resistive load, inductive load, and capacitive load can be controlled and adjusted independently in phases to accurately adjust the AC resonance point under the condition of unbalanced three-phase voltage. Anti-islanding simulation load
According to the performance parameter detection requirements, the corresponding power can be set through the remote machine, and the discharge power can be set in any combination. It can accurately simulate various load conditions and load frequencies, and the parallel resonance frequency is
The host is controlled by electronic circuits and has an automatic alarm protection function for temperature overheating. When overheating or overcurrent occurs due to special reasons, the load can be automatically cut off.
The measurement data can be uploaded to the machine and the function of recording and storing the detection process can be realized.
New power consumption components, high power density, no red hot phenomenon, the whole machine consists of three parts: resistive load, inductive load and capacitive load.
Power input is continuously adjustable. The load works in an energy-consuming manner, and forced air cooling is used for heat dissipation.
The measurement data of the inspection process can be recorded and saved to the remote machine (remote control room, required for test inspection reports).
Equipped with background analysis software, measurement data can be exported into formatted inspection reports.
Meets the anti-islanding test and testing requirements for grid-connected inverters, meets the standard test, meets the standard test process testing requirements, and has built-in test steps (times) in the software built-in version
The power load can be controlled and adjusted on the remote software (It is adjusted on the control room operating table, with automatic loading function and manual loading).
Programmable load box AC load box load box
It can satisfy the unbalanced three-phase voltage output by the grid-connected inverter. It can also accurately debug the occurrence of simulated resonance points and accurately detect the grid-connected inverter. Device anti-islanding effect protection function. Anti-islanding analog load
The host control circuit can automatically compensate the parasitic inductance of the resistive load components to meet the accurate loading active power detection.
The host control circuit can automatically compensate the parasitic resistance of inductive load components to meet the precise loading inductance detection and anti-islanding test detection.
During the anti-islanding test and detection process, the equipment is required to accurately simulate the AC resonant frequency (the inductor load is larger than the capacitor, the resonant frequency will be greater), the inductor load ratio is smaller than the capacitor, the resonant frequency will be less, and the component parasitic content is too large. It will lead to resonant frequency deviation. When testing the automatic islanding protection test of the inverter, avoid protection caused by over-frequency or under-frequency instead of anti-islanding protection)
Under the conditions of power quality factors, single-phase or three-phase Accurate detection of phase-to-grid inverter, there will be an indicator light after the load is accurately loaded.
Under the condition of power quality factors, it can meet the precise detection of single-phase or three-phase grid-connected inverters, and there will be an indicator light after the load is accurately loaded in place.
The products provided have a three-year free warranty, and on-site installation and debugging technical support services are provided free of charge.
Body. 2. Technical parameters of anti-islanding simulation load
.The main circuit is composed of three parts: resistive load, inductive load and capacitive load
.The three parts of load are controlled by built-in switches in sections , can realize automatic and manual load adjustment on remote software
. Resistive load is continuously adjustable, step amplitude
. Inductive load is continuously adjustable, step amplitude
. Capacitive load is continuously adjustable Adjustable, step amplitude
. The built-in load of the host adopts a three-phase four-wire access method. The three-phase loads can be independently controlled on the software panel. The software has a preset function to automatically load
. Resistance The sexual, perceptual and capacitive parts can be freely combined, the minimum step amplitude
. Applicable ambient temperature range ~ +℃ cooling method forced air cooling
.AC resonant frequency of the parallel circuit
.Connect The input load voltage is three-phase/or single-phase/
. The wiring method is three-phase four-wire system, single-phase two-wire system
. The voltage accuracy is .%, the voltage resolution is . The current measurement range, the accuracy is .
.Resistive load, inductive load and capacitive load are all marked
.Working power supply AC/(used in mainland China)
Body. 3. Optional function of anti-islanding simulation load
/> It is recommended to choose intelligent control. The software has built-in anti-islanding test standard detection processes and steps, and the adjustable load automatically loads prompts to quickly implement the inverter anti-islanding test and accurately compensate for the parasitic inductance and parasitic resistance in the load. value to accurately identify and detect the anti-islanding protection function of the grid-connected inverter. There will be an indicator light to prompt when the load is loaded accurately.
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