Welding machine "Resanta 250": description

Manual arc welding using coated electrodes is performed using the inverter welding machine "Resanta SAI-250".

Operating principle

Inverter welding machine "Resanta 250" is working on the process of converting to DC alternating current at a frequency of 50 Hz. Voltage in this conversion jumps to 400 V. Wide-pulse modulation of high-frequency voltage allows you to change the power of the welding current.

Welding machine design

The case of the welding inverter "Resant SAI-250" is made of high-quality metal. On the front panel of the inverter there are power connectors. Welding wires, indicators controlling network parameters and equipment overheating, and the welding current value selection lever are connected to the mentioned connectors.

Functionality of "Resanta 250"

Hot air generated during the operation of the inverter is output through special openings in the casing of the "Resant 250" welding machine due to the forced ventilation system. Protection of equipment from excessive overheating during operation is provided by this system.

The system of automatic switching-off of the welding machine "Resant 250 Prof" switches off the inverter when the power wires are interconnected. The indicator located on the front panel signals the device's disconnection. Efficiency and convenience of operation of the welding machine "Resanta 250" are provided with additional anti-slip and hot start functions.

The hot start function means instantaneous ignition of the electric arc due to the automatic increase of the current at the time of the inverter start. The second function of the welding machine "Resant SAI-250 Prof" - anti-adhesion - allows to avoid sticking of the electrode to the processed metals by reducing the welding current in a critical situation. The current strength rises to the required value after elimination of sticking.

Features of the inverter "Resanta"

In the conditions of significant differences and surges in the electrical network, the "Resant 250 PN" welding machine maintains uninterrupted operation. Perform welding work with this model of the inverter can be at low voltage thresholds in the network.

Apparatus "Resanta" can work with electrodes, whose diameter does not exceed 6 mm. The ultimate inverter current is 250 A. For a long time, the Resant 250 welding machine is able to withstand extreme loads thanks to pre-installed protection systems. This feature of the equipment can be considered its advantage, since the analogues offered in the current market of welding machines do not have such characteristics.

In the idle mode, the voltage is 80 V. The inverter is equipped with IGBT series transistors, ensuring uninterrupted operation under extreme loads and providing protection level IP21 of the Resant 250 welding machine.

Compact dimensions of the inverter and mobility make it easier to use. On the body of the device is a handle that allows you to transport the welding machine through the working area. In response to the welding machine "Resanta 250" it is noted that the distinguishing feature of the device is the accuracy and ease of setting parameters. The displayed parameter values remain unchanged even when the mains voltage is jumped.

Technical parameters of the inverter

Characteristics of the welding machine "Resanta 250":

1. The load duration of the inverter at a maximum current strength of 250 A is 70%.
2. The limiting current consumption is 35 A.
3. The operating temperature range of the inverter varies from -10 to +400 degrees.
4. The minimum value of the welding current is 10 A, the maximum value is 250 A.
5. The welding arc created by the inverter has a voltage of 30 V.

A gasoline generator with a power of 5 kW or more can power a welding machine. Electrodes for working with this model of the welding machine are selected taking into account the fact that when the input voltage decreases, the value of the welding current decreases.

Preparing the inverter for use

To avoid emergency situations when preparing the "Resant 250" welding machine for operation, it is necessary to observe the safety precautions and the enclosed instruction. Wires - with the electrode holder and grounding the negative - are connected to the inverter first. Before turning on the "Resant SAI-250" welding machine, the minimum current value is set, after which it is connected to the power grid or to a gasoline or diesel generator with a power of 5 kW.

Depending on the electrode used, the required amperage is set. The corresponding parameters are indicated in the special table given in the operating instructions of the welding machine.

The regulator of the inverter is set to the minimum value of the current after the completion of all welding operations, after which the power of the device is turned off. All cables are disconnected from the "Resident" only after it is de-energized.

Safety precautions

Before operation, the "Resanta" inverter should be kept for several hours at a positive temperature. Such measures prevent the formation of condensation in the cabinet, which can lead to emergencies. The insulation layer of the welding cables and wires that come complete with the welding equipment must not have any damage that could cause a malfunction of the device.

Welding works in rooms where parts are processed with the formation of small chips or metallic dust is prohibited. Any inclusions contained in the air can settle on the internal elements of the inverter. It is also not recommended to use the welding machine in rooms with a high moisture content in the air or outdoors during precipitation.

Work with the welding machine is carried out only if the following rules are observed:

1. The place of welding should be well ventilated.
2. Fire safety requirements must be strictly observed.
3. During work, it is necessary to use protective clothing and a special mask, which protects from burns and loss of vision.

The storage of the inverter is also subject to certain requirements:

• The absence of vapors of alkali and acids in the room, excessive dust, fine dust.
• The temperature range is -10 to +50 degrees Celsius.

Self-repair of the welding machine

Foreign and domestic specialists note the high operational resource of the "Resant SAI-250" inverter. If all operating rules and requirements for inverter storage and transportation are observed, the device can be used for several years, but it may require repair.

Both preventive and unplanned repair work of welding machines should be carried out only by qualified specialists in the service centers of the manufacturer. You can contact the authorized workshops that handle the equipment of the brand "Resanta". However, the user can perform simple diagnostic and repair work independently. The need for them arises most often when the welding machine overheats, as indicated by the indicator on the front panel. This problem is resolved by disassembling the inverter housing and cleaning its interior from dust and dirt accumulated during operation.

Low efficiency of the "Resant" welding device can be caused by a decrease in the power supply voltage or the use of wet electrodes. In the second case, it is sufficient to dry the electrodes or replace them with new ones before proceeding to welding operations.

Advantages of welding equipment

The welding machine "Resanta SAI-250" is one of the most powerful inverters offered in the modern market of similar equipment. Despite the fact that this model is positioned as an industrial one, it can work from the standard 220 V. The cost of the inverter does not differ from similar domestic welding devices.

The advantages of the device "Resant" include:

• Operation of the inverter is possible at a voltage level in the network from 140 to 242 V. When the voltage drops by 30% and with its unstable readings, the device continues its operation without interruption.
• With this equipment, it is possible to use electrodes whose diameter does not exceed 6 mm.
• Welding works can be carried out with any kinds of metals;
• The forced ventilation system protects the inverter from overheating and prolongs its service life at peak loads.
• With an idling voltage of 80 V, the electrode is quickly ignited.
• Arc forcing function.
• Formation of high-quality welding seam.
• Anti-stick function of the electrode during operation.

Advantages of Resant 250 include compact dimensions and light weight of 5 kilograms, so that the device can be transported on the job site.

Disadvantages of the welding machine

The development of welding equipment produced under the brand name "Resanta", engaged in the Latvian engineers, but the assembly of devices is carried out in China. For this reason, the build quality leaves much to be desired. It is extremely rare to encounter electronic faults, however, they are all easily eliminated. Separately it is worth noting the fact that the cost of similar equipment of European production will be several times higher.

Inverter "Resanta SAI-250" belongs to the category of industrial, but the maximum time of its operation at the maximum value of the current strength is 4 minutes, after which a break is required. In this case, the device is able to work for a long time at a load of 70%.