Industrial-Grade Resistance Spot/Seam/Butt Welding Transformer Mf380 up to 380kVA

Product Description

Sailton Brand Medium Frequency Resistance Welding Transformers MF380

(Prices are for reference only, please consult the salesperson for specific prices.)

Brief introduction 

Medium-frequency (MF) transformers are a result of recent advances in resistance welding technology. 

They arepowered by a transistor inverter, supplying square wave AC 500 V @ 1000 Hz which is converted by the MF transformer to a low voltage high current AC.

This low voltage AC current is rectified to DC by a diode block built into the transformer.

The higher operating frequency of an MF system allows efficient energy conversion using a smaller and lighter transformer.

Other benefits with MF transformers used in portable and robotic welding guns are:

The reactance of the welding loop only limits the upslope and down slope of the welding current.

While the peak welding current in limited only by the welding loop's resistance. 

The net result is again smaller transformer, especially when welding with large throat, high-impedance guns.

MF welding is less demanding on the plant power system.

The MF inverter draws balanced line current from all 3 phases and operates at a high power factor (0.9).

With MF transformers the peak welding current almost equals its RMS value, which helps to obtain quality welds with no splash and constantstrength even at lower pressure.

The high frequency permits much faster - 1000 times per second - process control, which again results in better weld quality.

Application 

1) Spot Welder
2) SEAM Welder
3) Projection Welder
4) High Frequency Induction Heating

For all kinds of intermediate frequency, power frequency 

resistance welding machine.Such as automobile welding clamp,

seam welding machine, mesh welding machine and so on.

Product Parameter
 

TYPE			Unit	MF6160	MF170-3G	MF130	MF170	MF220	MF225
primary nominal voltage			v	500	500	500	500	500	500
frequency			Hz	1000	1000	1000	1000	1000	1000
nominal power at 20%ED			kVA	170	170	130	170	220	350
nominal power at 50%ED			kVA	105	105	85	105	150	225
nominal power at 100%ED			kVA	75	75	58	75	117	170
secondary  voltage			V	9	9	9	9	13	13
permanent DC current 100%			A	8500	8500	6500	8500	9000	13000
short-circuit current			KA	38	38	32	38	45	55
turns ratio			N1/N2	55:1	55:1	55:1	55:1	38:1	38:1
weight			kg	20	20	15	20	25	40
temperature switch				2 x 150 °C, 1 x 70 °C   Temperature switch
insulation class				F(155°C)
eddy current testing				150mV/KA±3%	150mV/KA±3%	150mV/KA±3%	150mV/KA ±3%	-	150mV/KA±3%
size			mm	171.5×127×295	160*130*256	150*106*276+82	160X125X262	160×125×318	171.5*151*450
cooling water quant. Q       Temp max. 30ºC			I/ min	8	8	8	8	12	12
pressure drop p (Q=6l / min )			Mpa	<0.2	<0.2	<0.2	160X125X262	<0.1	<0.1
Note: The electrode output mode can be adjusted as needed. Built-in () welding diodes				2	2	2	2	4	4

 

 

Load diagram

 

Certifications

 

Factory environment display

 

Packaging & Shipping