Injection tester HZ5375

primary currentfor electrical equipmentcompact

The HZ5375 5000A Primary Current Injection Tester is a self-developed test equipment by Huazheng, combining the advantages of similar products at home and abroad. It utilizes CNC technology for strong anti-interference ability. Compared to previous generations, it uses a low-power, large-capacity self-coupling voltage regulator and a high permeability iron core converter, resulting in large output power, small size, and light weight. It is mainly used for primary bus protection and various current transformer transformation ratio test projects, and is widely used in electric power, railway, petrochemical, metallurgy, and mining companies for scientific research, production, and electrical test sites. - Aesthetic and elegant PVC panel - Direct display of test values for primary and secondary current, convenient for observation and recording - Secondary measurement, turn ratio, and polarity display of CT PT - High measurement accuracy: 0.5 level - High power, small size, strong load capacity - Small size and light weight, only 30% to 70% the volume of similar products, very convenient to carry Technical Characteristics: - Name: HZ5375 5000A Primary Current Injection Tester - Environmental group: Group III instrument in GB6587.1-86 (suitable for outdoor environments) - Input voltage: AC 380V ±10% - Power: 36KVA - Output current: AC 0~5000A stepless adjustable, panel with digital display ammeter - Output voltage: 6V - Output waveform: Standard sine wave with small glitches, ripple coefficient less than 0.3% - Measurement accuracy: About 0.3 (using 0.2S grade material), higher than 0.5, true and effective value, high stability - Output current mode: True effective value, continuously adjustable - Current stability: 0.2% - Structural form: Fission - Wiring method: According to requirements - Protection settings: Overcurrent and overvoltage Working Principle: - The measuring circuit includes a current measuring circuit and a voltage measuring circuit (voltage test can be added as required). The volt-ampere characteristic function can be expanded. - The current measuring circuit includes micro current zero impedance CT, programmable amplifier circuit, and sampling circuit. - The voltage measurement circuit includes PT isolated signal acquisition circuit, programmable amplifier circuit, and sampling circuit. - A 16-bit single-chip microcomputer uses computer digital real-time acquisition to calculate high-voltage measurement values by measuring the amplitude of the voltage signal according to the voltage proportional relationship. Automatic timing is realized by comparing the measured voltage signal amplitude with the set value. Over-current protection is achieved by comparing the measured current/voltage signal amplitude with the set value. Safety Precautions: - Ensure instruments are well grounded for operator and instrument safety. - Connect the ground wire first before testing, and remove it last after work is completed. - The power supply must withstand a 30A current impact. - Check all wiring before connecting the instrument and test object to avoid equipment damage. - The maximum current value set for overcurrent protection must not exceed the rated output current value. - Do not plug or unplug any wires when the power is on. Transportation and Maintenance: - Product must be packed during transportation in a wooden box with foam and anti-vibration layers. It can be transported by road, railway, and air. Avoid open trunk placement and protect against rain, dust, and mechanical damage. - Store in a ventilated room at -40°C to 60°C, relative humidity ≤82%, no corrosive gas, not close to ground or wall. - In humid areas or seasons, power on the instrument once a month for about two hours to distribute moisture and protect electronic components. - Avoid direct sunlight exposure to the display screen when used outdoors; do not store in a particularly humid warehouse. Quality Assurance: - Manufactured in strict accordance with national and enterprise standards, ISO9000 compliant. - 1-year warranty period for manufacturing defects. - Three guarantees policy implemented. - Long-term maintenance, training, and accessories supply provided during service life.