LZAQ1 series intelligent dual power automatic transfer switch

LZAQ1 series intelligent dual power automatic transfer switch (hereinafter referred to as transfer switch) is composed of molded case circuit breaker or load switch as actuator, interlocking transfer mechanism and automatic controller with single chip as core. It is a dual power automatic transfer switch with perfect performance, safety and reliability, high degree of automation and wide application range. It has the characteristics of simple and reliable structure, beautiful appearance, complete specifications and convenient operation and maintenance.

This product is suitable for AC 50/60Hz, 690V and below, rated current from 6A to 1250A and below, in a power supply system composed of two power supplies (normal power supply N and backup power supply or generator power supply R). When one power supply fails (power outage, phase failure, undervoltage, overvoltage), the power supply is automatically switched to ensure the reliability and safety of power supply. It is widely used in high-rise buildings, residential areas, hospitals, airports, docks, fire protection, metallurgy, chemical industry and other important places where power outages are not allowed to achieve unattended continuous power supply. The product complies with GB/T14048.11 standard. Electrical grade CB grade (the main contact can connect and disconnect short-circuit current and is equipped with overcurrent release).

1. The upper limit of the ambient air temperature shall not exceed +40℃, the lower limit shall not be lower than -5℃, and the average value of 24h shall not exceed +35℃;

2. The relative humidity of the atmosphere shall not exceed 50% when the ambient air temperature is +40℃, and higher relative humidity can be achieved at lower temperatures. The average maximum relative humidity of the wet month is 90% and the average minimum temperature of the month is +25℃, and condensation on the product surface due to temperature changes shall be taken into account;

3. The installation location altitude shall not exceed 2000m;

4. The installation category is IV.

5. This product should be installed in a place without severe vibration and impact, and where the electrical components are not subject to unnecessary corrosion.

The dual power controller has three structural forms according to user needs: intelligent one-piece type (type B), intelligent split type (type D), and economical built-in type (type C). The main differences between the three controllers are shown in the following table:

【Note】
① The automatic controller with self-transfer and self-recovery (R) function automatically switches the two power supplies (normal power supply N and backup power supply R). In normal state, the normal power supply is used for power supply. When the normal power supply is abnormal and the backup power supply is normal, it automatically switches to the backup power supply after the set transfer delay C (adjustable from 0 to 22s). When the normal power supply returns to normal, it can switch to the normal power supply after the set return delay b (adjustable from 0 to 22s).
② The automatic controller with the function of automatic transfer but not automatic recovery (S) automatically switches the two power supplies (normal power supply N and backup power supply R). In normal state, the normal power supply is used for power supply. When the normal power supply is abnormal and the backup power supply is normal, it automatically switches to the backup power supply after the set conversion delay C (adjustable from 0 to 22s). When the normal power supply returns to normal, it cannot automatically switch to the normal power supply. It is not until the backup power supply is abnormal that it automatically switches to the normal power supply after the set return delay b (adjustable from 0 to 22s).
③ Generator self-starting function: When the power is normal, the relay is closed and the generating contacts are disconnected; when the power is abnormal, after the conversion delay (such as when the power is off, there is no delay), the generating signal is issued.
The generating contacts are closed, and when the generating voltage reaches normal, it automatically switches to the generator power supply; when the common power supply returns to normal, it automatically returns to the common power supply, the generating contacts are disconnected with a delay, and the generator stops generating electricity.
④ If there is a fire signal, the conversion switch will perform a double-break operation and automatically return to the "double-break" state. At this time, you need to press the manual automatic key to reset and return to normal working state.