SRMQ3-63L type dual power switchDetailed product description：

Model meaning


Scope and characteristics of application
SRMQ3-63L automatic transfer switch is suitable for AC 50Hz, rated voltage 380V/220V; In a three-phase four wire (or single-phase one wire) dual power supply grid with a rated current of up to 63A, when one power supply fails (only detecting A-phase voltage, only detecting undervoltage and phase loss), one or several load circuits are automatically connected from one power supply to the other to ensure the normal power supply of the load circuit.
The product complies with the IEC60947-6-1 standard and GB/T14048.11 standard, and has the international advanced level of the 1990s.

Normal working conditions
Surrounding air temperature: The upper limit should not exceed+40 ℃, the lower limit should not be lower than -5 ℃, and the average value over 24 hours should not exceed -35 ℃;
Altitude: The installation location has an altitude not exceeding 2000m; Atmospheric conditions: The air is clean; The relative humidity of the atmosphere does not exceed 50% at a maximum ambient temperature of+40 ℃, and can have higher relative humidity at lower temperatures. When the average lowest temperature in the wettest month is -25 ℃, the average maximum relative humidity for that month is 90%, taking into account condensation on the surface of the product due to temperature changes. Special measures should be taken for occasional condensation caused by temperature changes.

structure and performance
The SRMQ3-63L automatic transfer switch is composed of actuating components (small circuit breaker DZ47), single motor electric operating mechanism, mechanical interlocking, auxiliary system, control circuit, etc. All components are installed on the same metal base plate, and the controller panel has clear status indicator lights to accurately indicate the status of the small circuit breaker. The control power supply voltage of the conversion switch is AC220V, and the mechanical life is 10000 times.
The automatic controller (only self switching and self resetting) simultaneously detects the voltage of two power sources (referred to as the common power source and the backup power source). In normal condition, it is powered by the common power source. When the common power source experiences an abnormality, such as voltage loss or phase loss (phase A of the small circuit breaker), the automatic controller will instruct the transfer switch to automatically switch to the backup power source for power supply; After the common power supply is restored to normal, the automatic controller will instruct the conversion switch to automatically return to the common power supply without delay; It is not allowed for two abnormal paths to occur simultaneously.