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

The ZW32-12 high-voltage dual power supply interlocking device (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 an AC frequency of 50 Hz, a rated voltage of 12 kV, and a rated current up to 630 A. When one power supply experiences a power outage or undervoltage, it automatically switches to another normal power supply to reliably ensure the continuity of power supply. At the same time, it has protection and interlocking functions such as short circuit and overcurrent, effectively avoiding unnecessary re-power supply impact when the load fails. When the common power supply fails and power is cut off, the switching device can complete the automatic switch to 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 supply automatic switching product with novel design, perfect performance, safety, reliability, high automation, and wide application range. The product is designed to ensure complete isolation of the two high-voltage power supplies, and adopts perfect and reliable mechanical and electrical interlocks, so it has very high safety and reliability. This product is suitable for dual power supply 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 10 kV distribution lines in oil fields, mines, metallurgy, chemical industry, railways, communications, machinery, etc., as well as 10 kV lines in industrial and mining enterprises.

Note: When installing the high-voltage dual power supply interlocking device, 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 enclosures must be safely and reliably grounded. The low-voltage side cables should also be laid with attention to the safety insulation distance.

8.Fault Analysis and Troubleshooting

8.1 Normal Working Conditions After turning on the main power and standby power switches on the intelligent controller panel, the panel status is as follows: one power supply indicator's closing lamp is on, the other's opening lamp is on, or both opening lamps are on. 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 on the controller LCD screen are undervoltage (phase loss).

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 check whether the current transformers and current boosters used are regular 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 commissioning, when both the main and standby power are available, 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 commissioning can it be put into normal use.