Complete High-Voltage Switchgear Test Bench DeviceOperating Method:
1. Three-phase four-wire AC voltage 0-450V adjustable output
1.1 Connect the three-phase four-wire power supply to the test bench, close the main power switch on the panel of the test bench. At this time, the "Power Voltage" voltmeter indicates the power supply voltage. Turn the "Power Voltage" switch to observe the balance of the power supply voltage; rotate the voltage regulator handle counterclockwise to zero. "
1.2 After the above preparations are completed, press the "Close" button of the "AC Operating Voltage" unit, the red indicator light will turn on, and the circuit will be connected. Then press the "Close" button of the "Output Adjustment" unit on the lower panel, the red light will turn on, and the voltage regulator will be energized. Rotate the "Output Adjustment" three-phase voltage regulator handle clockwise while observing the voltmeter of the "AC Operating Voltage" until the required voltage value is reached; if a three-phase voltage output of 0-450V is needed, close the air switch next to the "Three-phase 0-380V Output" terminal on the rear terminal board; if AC operating voltage output is needed, close the air switch next to the "AC Operating Voltage" terminal on the rear terminal board, and close the air switch next to the "AC 220V" terminal on the rear terminal board to obtain 0-220V AC voltage output. After the test is completed, rotate the three-phase voltage regulator handle counterclockwise until the voltage reaches zero, and press the "Open" buttons respectively; the test is then complete.
2. Three-phase four-wire AC current 0-10A adjustable output
Connect the three-phase four-wire power supply to the test bench, close the main power switch on the panel of the test bench. At this time, the "Power Voltage" voltmeter indicates the power supply voltage. Turn the "Power Voltage" switch to observe the balance of the power supply voltage; rotate the voltage regulator handle counterclockwise to zero. "
2.1 After the above preparations are completed, press the "Close" button of the "Three-phase AC Current" unit, the red indicator light will turn on, and the circuit will be connected. Then press the "Close" button of the "Output Adjustment" unit on the lower panel, the red light will turn on, and the voltage regulator will be energized. Rotate the "Output Adjustment" three-phase voltage regulator handle clockwise while observing the ammeter of the "Three-phase AC Current" until the required current value is reached; rotate the "Three-phase AC Current" switch to read the three-phase currents separately. Note that the switch should not be placed in the "0" position at any time; for 0-10A three-phase AC current output, also close the air switch next to the "Three-phase AC 0-10A" terminal on the rear terminal board. After the test is completed, rotate the three-phase voltage regulator handle counterclockwise until the voltage reaches zero, and press the "Open" buttons respectively; the test is then complete.
Product Overview:
It is used by high and low voltage switchgear manufacturers to conduct various power-on tests on the high and low voltage switchgear they produce before leaving the factory. It can provide various AC and DC power supplies, facilitating the testing of switchgear and improving work efficiency.
Complete High-Voltage Switchgear Test Bench DeviceUsage Instructions:
1. Connect three-phase four-wire AC380V
2. Connect the output DC300V to the load
3. Rotate the output adjustment knob counterclockwise to zero.
4. Check and confirm the wiring is correct
5. Close the power switch
6. Slowly adjust the output adjustment knob to raise the voltage to a suitable value
Safety Technical Operating Procedures:
1. When working on panels that are fully or partially energized, the equipment under maintenance should be clearly marked to distinguish it from the operating equipment. [1]
2. When performing work with significant vibration such as drilling on protection panels, measures should be taken to prevent the tripping of operating equipment.
3. The secondary windings of all current transformers and voltage transformers should have permanent and reliable protective grounding.
4. When working on the secondary circuit of a current transformer in operation, the following safety measures should be taken:
1. It is strictly forbidden to disconnect the current circuit;
2. To reliably short-circuit the secondary coil of the current transformer, short-circuit pieces and short-circuit wires must be used;
3. Any work is prohibited on the circuit and conductors between the current transformer and the short-circuit terminal;
4. Work should be supervised by a dedicated person, using insulated tools and standing on an insulating mat, and the permanent grounding in the circuit must not be disconnected.
5. When working on the secondary circuit of a voltage transformer in operation, the following safety measures should be taken:
1. Strictly prevent short circuits or grounding;
2. Insulated tools should be used, and insulating gloves should be worn. If necessary, the relevant relay protection devices should be deactivated before work;
3. When connecting temporary loads, dedicated switches and fuses must be installed;
4. During secondary circuit energization tests, to prevent reverse transformation from the secondary side to the primary side, in addition to disconnecting the secondary circuit, the primary fuse should also be removed;
5. Before energizing or conducting withstand voltage tests on the secondary circuit, the duty personnel and relevant personnel should be notified, and someone should be assigned to guard the site, check the circuit, and confirm that no one is working before applying voltage.
6. Personnel inspecting the trip protection and secondary circuits are not allowed to perform any switching operations without the permission of the duty personnel.
