YJVA3-1 3P+N four in two out automatic phase sequence conversion switch

Scope application

The four in two out automatic phase sequence conversion switch is a comprehensive intelligent automatic phase sequence conversion switch that integrates intelligent automatic phase sequence conversion, overvoltage protection, undervoltage protection, and overcurrent protection. When any one of the lines experiences overvoltage, undervoltage, or overcurrent faults, this product can cut off the power supply within the set time, automatically switch the phase sequence, restore power supply, and avoid unnecessary damage to electrical equipment. The overvoltage value, undervoltage value, overcurrent value, and output phase sequence of this product can be set and selected by oneself, and the corresponding parameters can be adjusted according to the local actual situation. Widely used in homes, shopping malls, schools, factories, etc.

Product Features

The product is a new generation intelligent automatic phase sequence conversion switch designed and produced in full compliance with enterprise standards for overvoltage, undervoltage, and overcurrent.

The 4-in-2-out design enables the protector to monitor multiple power inputs simultaneously and select the appropriate power output based on the set parameters, ensuring the stability and safety of the system.

When one or two phases of the power supply in the line experience overvoltage, undervoltage, or overcurrent faults, the protector can automatically switch to the backup power supply upon detecting voltage abnormalities. After a self set delay time, it will automatically reset and connect the line without manual operation, ensuring the continuity and reliability of the system.

When there is a transient or transient overvoltage in the circuit, the phase sequence conversion switch does not cause misoperation.

When there is a phase sequence fault in the line, such as unstable voltage or sudden power outage and power outage, the phase sequence conversion switch automatically detects and switches to the normal phase sequence power supply output. This delay time can be set by the user according to local conditions. The maximum line voltage should not exceed 330VAC to prevent damage to the product due to high power supply voltage. If a high power supply is required in specific situations, please contact the manufacturer.

Normal working conditions

1. Surrounding air temperature

a. The upper limit value does not exceed+40 ℃

b. The lower limit value shall not be lower than -5 ℃,

c. The average value within 24 hours shall not exceed+30 ℃,

d. Extreme operating temperature -10 ℃~+50 ℃

2. The altitude of the installation location shall not exceed 2000 meters

3. Atmospheric conditions

a. When the ambient air temperature is+35 ℃ and the relative humidity of the air does not exceed 50%, At lower temperatures, there can be higher relative humidity.

b. When the monthly average lowest temperature of the wettest month is 20 ℃, the monthly average relative humidity is 90%，

c. Considered condensation on the surface of the product due to temperature changes

4. The pollution level used by the pollution level protector is level 3

5. Installation category: Class II and III

6. Installation conditions

a. The protector can be installed vertically or horizontally inside the cabinet, and special requirements require special ordering.

b. It should be installed in a medium without explosive hazards, and there should be no gas or conductive dust in the medium that can corrode metals and damage insulation

c. It should be installed in a place without rain or snow invasion.

Product Settings

Main parameters and technical performance

precautions

After the installation of the protector is completed, the user can wire it and select a wire cross-section that meets the standard according to the rated current of the protector. Pay attention to the connection of the protector and ensure that the outgoing wires are not connected incorrectly to avoid product damage or inability to power on.

Users should follow relevant regulations and pay attention to the following matters when conducting various operations or experiments to ensure the correct and safe use of the product.  

Connect the input and output terminals correctly according to the product identification. (The load current should be less than the protection current value of the product)

The neutral wire N cannot be connected incorrectly and must be reliably wired, otherwise the protector cannot work properly.

Before connecting the power supply, please carefully check whether the wiring is correct, whether the load size matches the product’s current protection value, and whether the wiring screws are tightened, otherwise the product will be damaged.

After the product is powered on, do not touch live parts to avoid electric shock. This product needs to be paired with a micro circuit breaker to provide short-circuit protection function. Otherwise, if there is a short circuit at the input or load end of the product, it will not be able to provide load limiting protection function. Products that are not used for a long time should pay attention to moisture and dust prevention. Before use, the product should be debugged according to the above content, and can only be put into operation after it is normal.

This product does not have isolation function. Please disconnect the front circuit breaker switch when repairing the circuit.

The neutral wire (N wire) of this product is a straight through wire without disconnection function! This product does not have excessive current short-circuit breaking capability. Please install small circuit breakers such as DZ47 and C65 at the front end of the circuit for overcurrent protection.

Product size

Wiring diagram