The main technical parameters:
FT8100 series indicator parameters
Rated grid voltage
Allowable grid voltage range (three phase)
Rated grid frequency
Allow grid frequency
Frequency tracking rate
Total current waveform distortion rate
DC current component
<0.5%（Rated output current）
DC input: current
Current function accuracy
Current display accuracy
Current adjustable range:
Load 10% to 90% reaction time:
DC input: voltage
DC input voltage range
Maximum DC voltage
Full load voltage range
Voltage measurement accuracy
DC input: power
Power measurement accuracy
Power adjustable range:
Load 10% to 90% reaction time:
Power frequency isolation
Forced air cooling
Allowable ambient temperature
Allow relative humidity
Allow the highest altitude
6000 m（More than 2000 meters need to be derated）
LCD touch screen
Size (width × depth × height)
l Energy feedback to the grid, energy saving can reach more than 85%;
l Wide input voltage range, DC voltage input range 450-820V;
l Wide input power range, DC power input range of 50-500KW;
l DC current, resistance, power, and time can be set;
l Real-time display of various important parameters such as voltage, current, power, power factor, frequency, and accumulated feedback energy at the AC and DC terminals;
l Color touch screen operation, friendly human-computer interaction;
l Output pure sine wave with low harmonic distortion;
l High efficiency, high control precision, stable and reliable；
l User can choose BMS simulator option, this option simulates battery BMS function, with Can interactive interface, which can realize more rich test function and higher automation degree between charger (pile) and load; Customer requirements customize interactive protocols.
The FT8100 has a constant current, constant resistance, and constant power mode to meet different test requirements. In constant current mode, the load always consumes a constant current regardless of the input voltage. The working curve is shown in Figure 3-1.
负载电流：Load current 设定电流：Set current 输入电压：Input voltage
In the constant resistance mode, the load is equivalent to a constant resistance, and the input current is adjusted as the input voltage changes. The working curve is shown in Figure 3-2.
负载电流：Load current 设定电阻：Setting resistance 输入电压：Input voltage
In constant power mode, the load will consume a constant amount of power. The input current is linearly adjusted as the input voltage changes to ensure that the power consumption is constant. The operating curve is shown in Figure 3-3.
负载电流：Load current 设定功率：Set the power 输入电压：Input voltage
The FT8100 has a sequence test function that simulates the timing changes at the input based on user-edited sequence parameters.
The sequence step parameters include: the function of each step, the set value and the delay time. The electronic load can store up to 6 sequence files, each of which can take up to 15 steps. The single step delay can be set to a maximum of 600 minutes. The figure shows a sequence of 5 steps and 2 loops.
图3- 4 Sequence test
The user can set the number of times the sequence is executed cyclically (0 to 9999). When the number of executions is set to 0, it indicates an infinite loop.
The FT8100 has a color touch screen operation interface. Users can easily view load operation information through the touch screen and implement various test functions, including: controlling load operation, displaying real-time operation data, displaying fault information, adjusting test functions and parameters, viewing history records, etc. . The interface diagram is as follows:
图 4 Touch screen operation interface
图5 Column file editing page
The DC power supply, electric charging pile and other equipment to be tested will connect the corresponding power harness and communication harness to the FT8100 series of energy-feeding loads. The user can simply configure and start the FT8100 feed-loading touch screen to realize the function of the device under test. Performance and aging test as shown:
The typical efficiency curves of the FT8100 series of energy-feeding loads are as follows:
According to the curve above, we take the input power 110KW, the input voltage is 600V as the reference point, and see that the feedback efficiency exceeds 95%. After deducting the working power of the equipment, the power fed back to the grid exceeds 100KW, that is, the power saving exceeds 100 degrees per hour.
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