Home / Devices
Back
Reading time: 2 min
0
2256
There are several models in the SAI line of welding machines, one of them popular is the Resanta SAI-160. It is inexpensive and often found in Russia and the CIS countries.
The company equips service centers in all large and small cities. Here the inverter is repaired and serviced under warranty.
Now you can find three variants of the model. Each master chooses his own option according to his needs.
- Universal model Resanta SAI-160 (160A)
- Resanta SAI-160PN, which is not afraid of voltage surges
- Compact Resanta SAI-160K
- How do the SAI-160 welding machine circuits differ?
Universal model Resanta SAI-160 (160A)
This is a small, simple device for basic use. Used for RDS welding with one welding rod with a base coating.
The description of the unit says that it is used for domestic needs. It is used by beginners to learn welding and by garage workers for work.
The maximum current strength is 160 A. With this parameter, you can weld garage doors, repair gates, make a greenhouse or a barrel. Connects to a home network with a voltage of 220 V. You can cook with small electrodes up to 4 millimeters.
The Resanta SAI-160 package is small: two cables, a terminal and a holder. A two-meter cable is enough for a home. If you need a longer wire, you can always purchase an extension cord. The power cable is short, 170 centimeters.
The mask is not included in the package, you need to buy it yourself, but in this case it is a plus.
The masks that come with the devices are usually of low quality and deteriorate after the first use. The cables included in the kit do not last long, so you should immediately buy spare ones.
The SAI-160 device has a hot start button and an anti-stick function. They guarantee a reliable arc and prevent the electrode from sticking to the metal. These are common problems that new welders encounter.
Inverter welding machine SAI-160K (compact)
Description
Features and Benefits
- The inverter welding machine SAI-160K (compact) operates from a household electrical network and does not require a special connection method.
- The inverter system uses a relatively small transformer complete with IGBT transistors and ensures a small size and light weight of the device, which allows it to be easily moved to the location required by the operator. There is a special convenient shoulder strap for this purpose.
- The device is equipped with warning elements against dangerous overheating, which makes its operation safe and reliable.
- The unit has the functions “anti-sticking” (ANTI STICK) and “hot start” (HOT START), and the duration of its activation is 70%.
- A high-quality, durable housing protects the components of the welding machine from damage and at the same time ensures reliable cooling of the working transformer.
- The ability to convert high-frequency current (hence the small parameters of the transformer) and a wide range of regulation of the welding current power are the advantages of this device.
- It is possible to use AC or DC electrodes.
- The device does not require special training to connect and use it. It is enough for the user to have initial knowledge and practice.
general description
The Resanta SAI-160K device is a portable inverter-type device for manual welding, capable of providing full-fledged welding work at the household (and not only) level. The unit is simply connected to a household power supply with a voltage of 220+/-10% V and is designed to work with coated welding electrodes and a metal core diameter of up to 4 mm inclusive.
Welded joints of metal elements are quite common both in production and in domestic conditions. Welding transforms different iron elements into a single, strong, non-demountable structure, the strength of which is incomparable to anything else. As a rule, this connection method is used to obtain the most reliable connection where it is impossible or impossible to use a threaded connection. Manual welding is quite widespread both in everyday life and in production (any construction, installation, repair work, etc.). And if previously, to carry out such work, bulky and heavy units were required, then with the advent of inverter devices, these shortcomings were eliminated.
The described Resanta SAI-160K unit is one of the most convenient and compact tools for performing work of this kind. He can do almost any welding operation. Light weight and dimensions, a comfortable and durable shoulder strap allow the welder to easily move the device to the location required for work.
The system includes working cables (power with electrode holder and grounding cable). The length of each working cable SAI-160K is 2 meters. The system also has a power cable (170 cm) with a plug. If necessary, you can use an extension cord of the appropriate cross-section.
A special welding helmet and other personal protective equipment must be purchased separately.
To make the welder’s work easier (especially for beginners), the designers of Resanta SAI welding machines have created such a useful function as a “hot start” (HOT START). At the moment the electrode is sufficiently close to the elements being welded, the system automatically creates an increased operating current pulse, which contributes to the rapid formation of an electric arc. At the same time, the welding process is greatly facilitated.
The “anti-stick” function (ANTI STICK), also characteristic of all Resanta SAI devices, in turn is designed to facilitate the work of the welder, eliminating the phenomenon of electrode sticking during the arc burning period. In this situation, the device automatically reduces the welding current, facilitating easy tearing of the electrode. Immediately after this, the system restores operating parameters.
The main part of Resanta welding machines is made on the basis of high-tech IGBT transistors. As a result, it was possible to achieve a significant increase in the service life of the system, as well as significantly reduce its dimensions and weight. The transistor board is typically located in a vertical plane, which prevents the accumulation of dust and, as a result, unnecessary overheating.
Another characteristic feature of the system is the on-time (ON). This is a value that characterizes the ability of the device to operate continuously over a certain period of time. The basis was a 10-minute time interval. For the SAI-160K device, this parameter is 70% at maximum load. This means that welding can be carried out continuously for 7 minutes out of 10 and 3 minutes - a break at idle.
The welding machine of this model has a fairly significant open circuit voltage (80 V). This facilitates easy and quick ignition of the electric arc, which allows you to work with non-ferrous metals.
The creators of the welding machine also took care of its safe use. The main danger for devices of this kind is overheating, which can cause breakdown of the unit and other undesirable consequences. Resanta SAI-160K has a special warning system, which turns on (before dangerous overheating) an emergency indicator light. When the indicator lights up, it indicates the need to pause welding work. A 5-minute break is enough to restore the unit’s functionality. There is no need to disconnect it from the power supply.
Design and functionality
The housing of the Resanta SAI-160K welding machine has a compact rectangular shape, dimensions 260x130x190 mm and is made of high-quality sheet metal with a protective coating. The flat base of the case allows it to be placed stably on any surface, even with a slight slope. There are specially made slots on the sides of the housing through which ambient air can easily circulate, cooling the main transformer. The electrical safety of the housing meets the criteria of class IP 21 (protection against the ingress of foreign objects, but work should be done in a fairly dry atmosphere).
The switch and power cable are located on the rear panel of the case, and the control panel is located on the front panel. It is very simple, understandable and will allow even a beginner to understand it. Here the designers placed a rotary regulator for operating current from 10 to 160 A, a network indicator and an indicator warning of the approach of emergency overheating. On the same panel there are terminals for connecting the power cable with the electrode holder and the cable that ensures the closure of the electrical circuit for the welding process. At the top of the case there are fastenings for a shoulder strap.
All components of the welding machine are located inside the housing, ensuring its safe functionality within the limits of technical capabilities. The main element in this matter is a conversion transformer with special equipment that converts alternating current with a frequency of 50 Hz (power grid) into direct current, followed by its reverse conversion into alternating current, but with a much higher frequency (more than 20 kHz). Thus, it is possible to increase the current to 160 A at a voltage of 80 V. These transformations make it possible to achieve significant quality of the weld, which is especially important for the final result. The transformer has a finned light alloy surface that promotes intense heat transfer and efficient cooling of the element. This is also facilitated by two built-in fans.
Reliable operation and safety of the Resanta SAI-160K welding machine is ensured by a special protective system. Temperature sensors detect the approach of dangerous overheating in advance and warn the user by turning on the emergency indicator.
The principle of welding is that between the edges to be joined and the electrode close to them, with the help of a working current, an electric arc lights up, heating them to the melting temperature. The molten electrode firmly welds the joined edges together, forming a weld seam. The hot start and anti-stick functions are provided by automatic adjustment of the operating current. The initial approach of the electrode to the edges provides an increased impulse for rapid ignition of the arc. Then the current drops sharply, preventing the electrode from sticking. The special coating of the electrode consists of a special flux and prevents direct contact of the melt with oxygen and nitrogen impurities contained in the surrounding air. The quality of the weld directly affects the strength of the joint, so it must be checked. To do this, you should beat off the slag deposit with a hammer and make sure that the seam is uniform and intact.
Preparation for work and safety measures
The Resanta SAI-160K inverter welding machine is not complicated. Almost any adult can prepare it for work and operate it. Initially, you should take into account and ensure some safety points in order to prevent electric shock and other unpleasant consequences. The device is grounded through the power cord, so you should make sure that the socket has the appropriate equipment. After the working cables have been connected to the required terminals, you can plug the power cable into the outlet (the “mains” toggle switch should be off and the operating current regulator should be in the lowest position). Now you can turn on the device and set the required operating current. After completing welding work, turn off the device in the reverse order.
If welding work is carried out indoors rather than outdoors, care must be taken to ensure that it is well ventilated and that there are no flammable materials or gases in it. When starting work, the user must use protective equipment (gloves, headgear, special clothing and a special mask to protect the eyes and face). In addition, it is necessary to strictly adhere to fire safety rules and requirements for the safe operation of equipment of this kind.
The manufacturer of the welding inverter Resanta SAI-160K provides a guarantee for its flawless operation for 24 months from the date of its official sale.
Resanta SAI-160PN, which is not afraid of voltage surges
This is an expensive device from the entire line. At the same time, its functions and indicators do not differ from the SAI-160 model. It is used for manual welding with one electrode, the maximum current is the same 160 A.
Additional functions include anti-sticking, arc force and hot start. But is this model more expensive?
Everything is the same only at first glance. PN is “low voltage”. This distinguishes the device from the previous one, that is, it can operate at low voltage or surges.
Is it worth paying extra for an inverter? If you have to work in a private house or in a country house, then it’s worth it. The welding arc will be constant when the voltage drops. For such a unit you do not need to buy an expensive voltage stabilizer.
RESANTA SAI-160K - household welding machine using IGBT transistors
What should a household welding machine be like? First of all, it is reliable, capable of adapting to the capabilities of the home electrical network, not overloading it and completely coping with its task. The welding inverter RESANTA SAI-160K meets all these characteristics.
This device will become an indispensable assistant when welding with electrodes in the garage or in the country. The inverter allows you to work with 1.6-4 mm electrodes, which is quite enough for welding at home.
The presence of such built-in functions as “Arc Force”, “Anti-sticking” electrode and “Hot Start” will allow even a person who has not held electrodes to cook.
Due to the IGBT transistors that formed the design, the RESANTA SAI-160K welding inverter is distinguished by its very small size and weight. The weight of the welding machine is slightly more than 3 kg, and its dimensions are 310x135x250 mm.
Compact Resanta SAI-160K
Cheap model from the Resanta-160 line. The K in the name means “compact”. This is an advantage of the device for those who often need to travel to the welding site, including by public transport. You can’t easily take previous models with you.
The inverter weighs three kilograms, and SAI-160 weighs 4. It is so small that it can be carried in a backpack without purchasing a special bag. This is relevant for those who are just starting to learn how to cook and often make house calls.
The dimensions of the device are what distinguishes this model from others; in other characteristics it is completely similar to them.
It requires electrodes with a diameter of no more than four millimeters. This is enough to weld pipes. SAI-160 operates from the home network and can withstand voltage drops down to 10 V.
