Product advantages
1. The output part is controlled by DSP, with fast operation speed, strong real-time digital signal processing ability, wide transmission frequency band and high-resolution D / a conversion. The output waveform has high precision, small distortion and good linearity. The device is light in weight and easy to carry. Therefore, the device has a large number of advanced and professional materials. It is easy to start and carry.
2. The high-performance embedded industrial control computer and 8.4 "large screen high-resolution color TFT LCD can provide rich and intuitive information, including the current working state of the equipment, next work tips and various help information;
3. Voltage and current amplifier: the current and voltage of each phase do not use current and voltage boosters, but adopt direct output mode, so that the current and voltage source can directly output the waveform from DC to various frequency components, such as the combined waveform of square wave and harmonic superposition, fault transient waveform, etc., which can better simulate the current and voltage characteristics of various short-circuit faults.
4. The power amplifier circuit adopts imported high-power and high fidelity modular power devices as the power output stage, combined with carefully and reasonably designed heat dissipation structure, with sufficient power redundancy and thermal capacity. The power amplifier circuit has complete overheating, overcurrent, overvoltage and short circuit protection. In case of overcurrent in the current circuit and overload or short circuit in the voltage circuit, the output power will be automatically limited, the whole power amplifier circuit will be shut down, and an alarm signal will be given. In order to prevent the power amplifier circuit from overheating due to long-term operation under high current, the device sets a software time limit under high current. The device can work for a long time when the output is 10A or below. When the current exceeds 10a, the software starts within the time limit. When the time limit expires, the software automatically turns off the power output and gives an alarm indication. The greater the output current, the shorter the time limit.
5. Input and output: the switching value input circuit can be compatible with empty contact and 0 ~ 250V potential contact. In the potential mode, 0 ~ 6V is on and 11 ~ 250V is on. The switching value can conveniently measure the action time and action time difference of each phase switch contact.
6. The input part is isolated from the working power supply and power amplifier power supply of the host. The input ground is a suspended ground, so the common terminal of the input part is not connected with the common terminals UN and in of the current and voltage parts.
7. The potential input of switching value is directional. The common terminal shall be connected to the positive terminal of potential and the input terminal shall be connected to the negative terminal of potential to ensure that the potential of common terminal is higher than that of input terminal. During field wiring, the input common terminal shall be connected to + km, and the negative terminal of the contact shall be connected to the input terminal. If the connection is reversed, it will not be detected correctly.
8. The output part is the relay empty contact output. Output capacity: DC: 220V / 0.2A, AC: 220V / 0.5A. Switching value output is completely isolated from voltage, current, input and other parts. The action process of each output quantity is different in each test module. Please refer to the software operation instructions of each module for details.
9. Liquid crystal display and rotating mouse operation: the device adopts 800 × 600 high resolution TFT LCD as display. The whole process and results of the test are displayed on the display screen. The full set of Chinese character operation interface is clear and beautiful. The operation control is carried out by the photoelectric trackball mouse and two buttons. All data and test process are set on the display screen by the mouse. The operation is simple and easy to master.
10. Special DC power output: the device is equipped with a special adjustable DC power output on the chassis bottom plate, which is divided into 110V and 220V, which can be used as auxiliary power supply for field test. A potentiometer is also set for the power supply, which can be adjusted in the range of 80% - 110%. The rated working current of the power supply is 1.5A, which can be used as the DC working power supply of the protection device or the power supply of the tripping and closing circuit. If the power supply is overloaded or short circuited, it will burn out the corresponding fuse (2A / 250V). At this time, replace the fuse tube. 11. Independent adjustable DC power supply: the device is equipped with one adjustable DC power output on the chassis bottom plate, which is divided into 110V and 220V, which can be used as auxiliary power supply for field test. The power supply is also equipped with a potentiometer, which can be adjusted in the range of 80% - 110%. The maximum output current of the power supply can reach 1.5A. A cooling fan, a power line, a grounding terminal and three fuses are installed on the base plate. Among the three insurances, one is the total power supply insurance (10a / 250V), and the other is the voltage circuit insurance (2A / 250V).
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