Low-voltage switchgear power test bench output line terminal string in front of 10A, 16A air switch as a short circuit protection. According to the special requirements of users, they can be opened and closed at the same time without interlocking. Please pay attention to the requirements in use. It is best to have only one set of power output work at a time.
The low-voltage switchgear power-on test bench is not controlled by the contactor. As long as the main power switch is closed, it can output single-phase AC220V output (fixed value), three-phase AC380V output (fixed value), DC closing power output DC0-300V (large capacity ) It is an independent unit that can be used separately from the main cabinet. It can also be used in combination with the main cabinet and output directly from the DC 300V output terminal of the cabinet's rear panel. For detailed description, see the fifth: SXGK-300A switch closing power supply. The low-voltage switchgear power-on test bench cooperates with the chassis of the circuit breaker trolley through the transmission mechanism of the cabinet body to realize the “five prevention†function of the electrical operation. Under some new electrical conditions and operating modes, some of the “five preventions†functions of the center cabinet cannot meet the requirements and the “five prevention†function must be improved. Low-voltage switchgear power-on test bench is usually the use of electromagnet blocking, only when the trolley is in the test position, the live display device shows no electricity to open the door. When the handcart is put in, if the exit door is closed, the handcart can be operated, which is a safety hazard.
Low-voltage switchgear power-on test bench power line adopts "hands-in-hand" power supply mode, and when the circuit breaker in the center cabinet is in the test position, the outlet side may still supply power from other substations. Make sure that there is no electricity on the outlet side before making the grounding switch. At present, there are mainly three locking operation modes. Low-voltage switchgear electricity test bench using electroscope. Before closing the grounding switch, pull the circuit breaker trolley out of the cabinet and push it into the inspection trolley. Close the circuit grounding switch after verifying that there is no voltage. Low-voltage switchgear power-on test bench When the circuit breaker is in the test position and the live display device detects no voltage on the line, open the door and verify that there is no voltage, then close the grounding switch. The low-voltage switchgear power-on test bench relies on the line-side live display of the locking device. As long as the line side shows that the locking device indicates no power and the latch is opened, the operation of the grounding switch can be performed.
The low-voltage switchgear power-on test bench has a large amount of operation, which is equivalent to twice the power-off operation of the hand-operated trolley. At present, only the busbars are inspected and grounded, and special inspection electric trolleys and grounded trolleys are used. Method 2 was adopted by some power departments and the operation procedures were more complicated. The low-voltage switchgear power-on test bench is currently one of many methods used. When the circuit breaker is in the test position, only when the line side is without electricity, and the charged display device has electricity and normal, and the blocking electromagnet has electricity and normal, it can be grounded. Any failure or loss of power on the live display unit or the blocking electromagnet will prevent the closing operation. Low-voltage switchgear power-on test bench has not yet occurred with live and grounded switch accidents due to latching failure of live display devices. When the live display sensor fails or breaks, it will be reflected on the live display through the indicator light. Some of the electrical schemes of the low-voltage switchgear power-on test rig have no grounding switch and can not be locked directly with the outlet door, such as main transformer inlet cabinet, sectional cabinet and TV cabinet.
The low-voltage switchgear power-on test bench is not controlled by the contactor. As long as the main power switch is closed, it can output single-phase AC220V output (fixed value), three-phase AC380V output (fixed value), DC closing power output DC0-300V (large capacity ) It is an independent unit that can be used separately from the main cabinet. It can also be used in combination with the main cabinet and output directly from the DC 300V output terminal of the cabinet's rear panel. For detailed description, see the fifth: SXGK-300A switch closing power supply. The low-voltage switchgear power-on test bench cooperates with the chassis of the circuit breaker trolley through the transmission mechanism of the cabinet body to realize the “five prevention†function of the electrical operation. Under some new electrical conditions and operating modes, some of the “five preventions†functions of the center cabinet cannot meet the requirements and the “five prevention†function must be improved. Low-voltage switchgear power-on test bench is usually the use of electromagnet blocking, only when the trolley is in the test position, the live display device shows no electricity to open the door. When the handcart is put in, if the exit door is closed, the handcart can be operated, which is a safety hazard.
Low-voltage switchgear power-on test bench power line adopts "hands-in-hand" power supply mode, and when the circuit breaker in the center cabinet is in the test position, the outlet side may still supply power from other substations. Make sure that there is no electricity on the outlet side before making the grounding switch. At present, there are mainly three locking operation modes. Low-voltage switchgear electricity test bench using electroscope. Before closing the grounding switch, pull the circuit breaker trolley out of the cabinet and push it into the inspection trolley. Close the circuit grounding switch after verifying that there is no voltage. Low-voltage switchgear power-on test bench When the circuit breaker is in the test position and the live display device detects no voltage on the line, open the door and verify that there is no voltage, then close the grounding switch. The low-voltage switchgear power-on test bench relies on the line-side live display of the locking device. As long as the line side shows that the locking device indicates no power and the latch is opened, the operation of the grounding switch can be performed.
The low-voltage switchgear power-on test bench has a large amount of operation, which is equivalent to twice the power-off operation of the hand-operated trolley. At present, only the busbars are inspected and grounded, and special inspection electric trolleys and grounded trolleys are used. Method 2 was adopted by some power departments and the operation procedures were more complicated. The low-voltage switchgear power-on test bench is currently one of many methods used. When the circuit breaker is in the test position, only when the line side is without electricity, and the charged display device has electricity and normal, and the blocking electromagnet has electricity and normal, it can be grounded. Any failure or loss of power on the live display unit or the blocking electromagnet will prevent the closing operation. Low-voltage switchgear power-on test bench has not yet occurred with live and grounded switch accidents due to latching failure of live display devices. When the live display sensor fails or breaks, it will be reflected on the live display through the indicator light. Some of the electrical schemes of the low-voltage switchgear power-on test rig have no grounding switch and can not be locked directly with the outlet door, such as main transformer inlet cabinet, sectional cabinet and TV cabinet.
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