United Kingdom
Catalog   /   Tools & Gardening   /   Machines & Equipment   /   Welders

Comparison Dnipro-M SAB-250N vs Dnipro-M SAB-255

Add to comparison
Dnipro-M SAB-250N
Dnipro-M SAB-255
Dnipro-M SAB-250NDnipro-M SAB-255
Outdated Product
from $67.96 up to $84.00
Outdated Product
TOP sellers
Typeinverterinverter
Welding type
MMA
MMA
Specs
Welding currentDCDC
Input voltage230 V230 V
Power consumption5.5 kW5 kW
Min. welding current20 А20 А
Max. welding current250 А250 А
Duty cycle80 %
60 % /at 250 A/
Max. electrode size5 mm5 mm
More features
Hot Start
Anti-Stick
Hot Start
Anti-Stick
General
Protection class (IP)2121
Weight2.8 kg2.8 kg
Added to E-Catalogmay 2017october 2016

Power consumption

The maximum power consumed by the welding machine during operation, expressed in kilowatts (kW), that is, thousands of watts. In addition, the designation in kilovolt-amperes (kVA) can be used, see below for it.

The higher the power consumption, the more powerful the current the device is capable of delivering and the better it is suitable for working with thick parts. For different materials of different thicknesses, there are recommendations for current strength, they can be clarified in specialized sources. Knowing these recommendations and the open circuit voltage (see below) for the selected type of welding, it is possible to calculate the minimum required power of the welding machine using special formulas. It is also worth considering that high power creates corresponding loads on the wiring and may require connection directly to the shield.

As for the difference between watts and volt-amperes, the physical meaning of both units is the same — current times voltage. However, they represent different parameters. In volt-amperes, the total power consumption is indicated — both active (going to do work and heat individual parts) and reactive (going to losses in coils and capacitors). This value is more convenient to use to calculate the load on the power grid. In watts, only active power is recorded; according to these numbers, it is convenient to calculate the practical capabilities of the welding machine.

Duty cycle

The duty cycle allowed for the welding machine.

Almost all modern welding machines require breaks in operation — for cooling and general "recovery". The frequency of inclusion indicates what percentage of the time of the total work cycle can be used directly for work. In this case, 10 minutes is usually taken as a standard cycle. Thus, for example, a device with a duty cycle of 30% will be able to work continuously for less than 3 minutes, after which it will need at least 7 minutes of interruption. However, for some models, a cycle of 5 minutes is used; these nuances should be clarified according to the instructions.

In general, high frequency is required mainly for high-volume professional work; with a relatively simple application, this parameter does not play a decisive role, especially since you have to take breaks during work. As for specific values, the mentioned 30% is a very limited figure, typical mainly for entry-level devices. A value of 30 – 50% is also low; in the range of 50 – 70% is the majority of modern devices, and the most "hardy" models provide a frequency of more than 70%.
Dnipro-M SAB-250N often compared
Dnipro-M SAB-255 often compared