Welding machine "Resanta SAI-250": reviews, diagram

The "Resant SAI-250" welding machine is designed for manual arc welding using coated electrodes. The inverter is developed by the company of the same name, located in Latvia. The welding machine is assembled in the DPRK, which is reflected in its quality: all parts are perfectly fitted, there are no gaps, creaks and backlashes.

Principle of welding machine operation

The main task of the inverter "Resant SAI-250" is the conversion of an alternating current with a frequency of 50 Hz into a direct current, the voltage reaches 400 V at that. Wide-pulse modulation of the received high-frequency voltage allows such devices to regulate the welding current.

Design

On the front panel of the metal casing "Researches SAI-250" there are power connectors. They are connected to indicators, through which the network parameters and instrument overheating indication, welding wires and the welding current value selection controller are monitored.

The inverter "Resant SAI-250" is equipped with a forced ventilation system that removes hot air from under the housing of the device through special openings. The welding machine is reliably protected from overheating during operation due to such an effective protection system.

An additional protection system automatically turns off the welding machine in the event of a short circuit between the power wires. A special warning light warns of this incident, which lights up on the panel of the device.

Special inverter functions

Efficiency and usability of the "Researches SAI-250" are largely due to two important functions: "Hot start" and "Antisalipation."

Ignition of the electric arc of the welding machine takes place instantly thanks to the first function, realized by automatically increasing the welding current, which saves the user from additional actions. The function "Anticipation" automatically lowers the welding current when the electrode adheres to the metal surface when the arc is ignited. After eliminating such sticking, the inverter increases the current to the set value. Both functions are very useful and convenient in operation, which is confirmed by the reviews about the welding machine "Resanta SAI-250".

Inverter Features

The welding machine is designed for domestic use, as the "SAI-250" design and its design provide reliable and safe operation even with significant jumps and voltage drops. The inverter allows manual arc welding, even at minimum voltage.

The maximum diameter of the electrodes, which can be used when working with the "Rescue SAI-250", is 6 mm. The current is regulated in a wide range, but the upper limit is 250 A. The welding machine can withstand a high load for a long time due to the protection systems. Inverter "Resant" by its characteristics bypasses many similar models of welding machines offered on the market.

Voltage in the idle mode of the inverter is 80 V. Built-in transistors of the IGBT series guarantee a long service life of the welding machine even under the condition of its frequent use at high loads. The protection level of this inverter model is IP21.

The mobility and compactness of the "Rescuer SAI-250" greatly facilitates its use. A convenient handle, located on the inverter housing, allows you to quickly and easily carry it from place to place on the job site. Reviews about "Resident SAI-250" note the accuracy and simplicity of setting all parameters. The advantage of the device is that even with significant voltage surges, all the specified settings remain unchanged.

Specifications

The inverter has the following technical parameters:

• The welding machine can be operated at a temperature of -10 to +400 degrees.
• The limit value of the current consumption is 35 A.
• Adjustment of working welding current is carried out in the range of 10-250 A.
• The voltage of the welding arc, formed by the inverter of this model, is 30 V.

The welding machine works both from a centralized electric network and from a gasoline generator with a power of at least 5 kW. When choosing electrodes for welding, it is necessary to take into account the fact that when the input voltage decreases, the value of the welding current also decreases.

Preparing the device for operation

Prepare the inverter "Resanta SAI-250" to work easily - you must adhere to a certain sequence of actions in order to prevent the emergence of emergency situations. First of all, a grounding negative wire and a wire with a holder for the electrode are connected to the apparatus. After that, the minimum level of welding current is set with the help of the regulator. The inverter is connected to the mains and starts only after performing these actions.

In the operating instructions for the welding machine, the manufacturer indicated the current required for a particular type of electrode.

After the completion of all welding operations, the minimum current value is again set on the inverter, after which the device is disconnected and disconnected from the electrical network. Cables are disconnected from the device only after it has been de-energized.

Safety during operation of welding equipment

The inverter must be left in the room at a positive temperature for several hours before use. This precautionary measure will avoid the formation of condensation in the device, which can cause a short circuit. In addition, it is necessary to monitor the integrity of the insulation of the welding cable and the connection wires. Damage to the insulation layer not only contradict the safety requirements, but can also provoke the failure of the device.

Use the inverter "Resant" can not be in the premises where work is carried out, accompanied by the formation of small metal shavings and dust. Such inclusions can get inside the device and disable it. Also, do not use the inverter outdoors during precipitation or in rooms with high humidity levels.

When working with welding equipment it is desirable to adhere to several basic rules:

1. The place in which welding work will be carried out should be well ventilated and have access to fresh air.
2. The rules of fire safety are necessarily taken into account.
3. During work, it is necessary to use special protective clothing, a welder mask, a hat and tight gloves. Such products will help protect the skin and eyes from burns.

Inverter storage conditions

Welding machines must be stored under certain conditions. The room in which the inverter will be located should not contain vapors of acids and alkalis in the air, a large amount of dust and other suspended matter. The welding machine must be stored under the following conditions:

• The ambient temperature should be between -10 and +50 degrees Celsius.
• The humidity level of the ambient air should not exceed 80%.

Is it possible to repair the inverter on its own?

Both domestic and foreign experts note the great exploitation resource of the welding machine "Resanta SAI-250". Active operation of the inverter with the observance of safety procedures and all relevant requirements can last for years, however, like any other equipment, it requires regular repairs.

It is worth noting that both unscheduled and preventive repair of such equipment is best trusted by specialists. The service of the welding equipment of this brand is carried out by numerous authorized workshops. However, the user can perform uncomplicated repair work independently.

Such repairs are usually carried out in cases when the inverter overheats, as indicated by the indicator on the front panel. It is easy to eliminate such a problem - it is enough to clean the internal surfaces of the welding machine from dirt and dust.

Low-quality, unsatisfactory operation of the welding inverter, reduced power can be associated with low voltage of the electrical network or the use of wet electrodes. To solve the problem of reducing the power of the apparatus, associated with raw electrodes, can be easily and quickly: it is necessary to thoroughly dry all the electrodes.