Product Introduction:
Long-time High Current Generator combines the advantages of similar products at home and abroad, adopts numerical control technology, and has strong anti-interference ability. Compared with the previous generation of current boosters, it uses low-power consumption, large-capacity auto-coupling voltage regulators and high-permeability iron core transformers., It has the advantages of large output power, small size, and light weight. It is mainly used for primary busbar protection and transformation ratio testing of various current transformers, and is widely used in scientific research, production, and electrical test sites in enterprises such as electric power, railway, petrochemical, metallurgy, and mining.
Performance Features:
1. Load test, can be output instantaneously as required.
2. The output current is stable, the instrument indication is clear, and it is convenient to record data and observe the tested object.
3. The output current is divided into gears, each gear can be smoothly adjusted, the lifting control is free, and the adjustment is continuous and uniform.
4. Small size, light weight, flexible movement, easy operation, suitable for field use.
Technical Characteristics:
1. Name and classification
(1) Name: High current generator.
(2) Environmental group: It belongs to Group III instruments (i.e., can be used in outdoor environments) in GB6587.1-86 "General Outline of Environmental Tests for Electronic Measuring Instruments".
2. 1 Input voltage: AC220V ±10%
2. 2 Power: 5KVA
2. 3 Output current: AC0～1000A stepless adjustable, panel with digital ammeter
2. 4 Output voltage: (>6V)
2. 5 Output waveform: The output current is a standard sine wave with minimal burrs, better than the standard required by the power system, with a ripple factor less than 0.3%. Standard sine wave.
2. 6 Measurement accuracy: (using 0.2S grade materials) actually around 0.3; each current can be smoothly and continuously adjusted, with accuracy higher than 0.5 grade. The current and voltage meters display true effective values, with high accuracy and stability.
2. 7 Output current mode: true effective value continuously adjustable;
2.8 Current stability: 0.2
2.9 Structure form: integrated
2.10 Wiring method: according to requirements
2.11 Current stability: 0.2%;
2.12 Protection settings: overcurrent, overvoltage
Usage Method:
1. The instrument must be properly grounded.
2. After connecting the working power supply, turn on the switch, the red indicator light will be on, press the start button, and the green indicator light will be on. Connect the output terminal to the tested object, and the current booster is ready for boosting.
3. Rotate the voltage regulator evenly clockwise, and pay attention to the output current indication on the operation panel to reach the required high current.
4. During the test, once any abnormal phenomenon is found, cut off the power immediately, find out the cause, and then conduct the test again.
5. After the test, the voltage regulator must be returned to zero, press the stop button to cut off the power, and cut off the working power before removing the test wiring to ensure safety.
Long-time High Current Generator Precautions:
1. The test work must be carried out by at least two people, one operates and the other supervises to ensure safety.
2. The shell must be grounded. Do not ignore the prevention of personal safety accidents because of low voltage. The instrument must be properly grounded, and during use, the current booster transformer and the operation panel must be reliably grounded to ensure safety.
3. The wire from the secondary side of the current booster to the tested object should not be too long, and the cross-section should be sufficient (current density can be considered as 6-8A/mm). The contact surface should be cleaned (can be polished with fine sandpaper), otherwise the joint will heat up, and even the current cannot rise to the rated value.
4. Before work, check that the power supply has sufficient capacity, otherwise the power cord will heat up and the voltage will drop, affecting normal operation.
5. There should be no flammable materials at the work site. For temperature rise tests, sufficient fire extinguishing equipment should be prepared.
6. For continuous (temperature rise) tests, someone should be on duty at the site. Regularly check the heating condition of the current booster source equipment, wires, and joints, and make records. Due to fluctuations in the grid voltage, pay attention to adjusting TD to maintain the rated test current. During the test, once any abnormal phenomenon is found, immediately cut off the air switch power, find out the cause, and then conduct the test again. After the test, the voltage regulator must be returned to zero, cut off the power with the air switch, and cut off the working power before removing the test wiring to ensure safety.
7. The test work should comply with the relevant provisions of the electric power safety work regulations and formulate practical safety measures. It is designed for short-term work, so it is not allowed to work under rated capacity for a long time, especially not allowed to exceed the rated current operation to prevent overheating.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
