ZW32-12FGG/630A Floor-Mounted Dual Power High-Voltage Vacuum Circuit Breaker

ZW32-12 high-voltage dual-power automatic transfer switch (hereinafter referred to as the device) consists of a high-voltage vacuum circuit breaker and an intelligent controller. It is applied in dual-power supply systems with AC 50Hz, rated voltage of 12KV, and rated current up to 630A. When one power supply experiences a power outage or undervoltage, it automatically switches to another normal power supply, reliably ensuring the continuity of power supply. At the same time, it has protection interlock functions such as short circuit and overcurrent, effectively avoiding unnecessary power supply impact during load faults. When the common power supply fails and has a power outage, the switching device can complete the automatic switch with the standby power supply to ensure reliability and safety. It can also selectively switch between the two power supplies according to the needs of the load. It is especially suitable for important places that do not allow power outages, serving as an important electrical control device to ensure continuous power supply. It is a new generation of self-switching and self-recovery dual-power automatic switching product with novel design, perfect performance, safety, reliability, high degree of automation and wide application range. The product ensures complete isolation between the two high-voltage power supplies in design, and adopts perfect and reliable mechanical and electrical interlocks, so it has very high safety and reliability. This product is suitable for dual-power power users with high requirements for power supply reliability and safety, serving as a control and protection device for dual-power supply systems.

The product is widely used in 10kV distribution lines in oil fields, mines, metallurgy, chemical industry, railways, communications, machinery, etc., as well as 10kV lines in industrial and mining enterprises.

Note: When installing the high-voltage dual-power automatic transfer switch, please install it in isolation according to the high-voltage safety insulation distance. The cables used on the high-voltage side must be high-voltage cables of the corresponding voltage level, and the wiring must follow the relevant safety insulation distance regulations. All equipment shells must be safely and reliably grounded. The low-voltage side cables also need to pay attention to the safety insulation distance during wiring.

8.Fault Analysis and Troubleshooting

8.1 Normal working status: After turning on the main power and standby power switches on the intelligent controller panel, the panel status is that the closing indicator light of one power supply is on, the opening indicator light of the other power supply is on, or both power supplies show the opening indicator lights. The LCD screen displays as shown in Figure 8.1.4 of this manual.

8.2 When the intelligent controller is working, if a squeaking relay jitter sound is heard, please turn off the main power and standby power switches on the intelligent controller panel, check whether the power supply voltage is too low, and restart the controller after the voltage returns to normal.

10.3 The automatic control device does not switch after the main and standby power are powered on. Please check whether the main power and standby power switches corresponding to the left and right sides of the intelligent controller panel are turned on. Check whether the aviation plugs of the controller and the mechanism are tightened, and observe whether the main power and standby power are undervoltage (phase loss) on the LCD screen of the controller panel.

8.4 After the automatic switching closing, the mechanism closes and then opens. Please manually check whether the mechanism is in place for closing.

8.5 If there is no response, please check whether the matching is correct (the number on the back should be consistent with the number on the box), whether there is electricity, whether the operation is standardized, whether the antenna outside the controller is normal, and whether there is strong electromagnetic interference in the external environment.

8.6 If the overcurrent adjustment current is too high or too low, please detect whether the current transformers and current boosters used are formal and accurate.

Remarks: When the power switch is overloaded or manually opened, it must be manually closed (also called unlocking), otherwise normal switching cannot be performed. During debugging, when both the main and standby power are powered on, if the main power does not close, manual closing is required. When the main power is cut off and the standby power does not close, manual closing and unlocking are also required. Only after normal debugging can it be put into normal use.