Resistance Mf Transformers DC Unit for Welder Mf130

• Control: Welding Gun
• Cooling Way: Water Cooling
• Style: Hanging
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: MF transformers DC unit
• Electrode Stroke: Vertical
• Electric Current: Secondary Rectification
• Transmission: Hydraulic
• Conductive Way: Both-Sided
• Welding Spot Number: Single
• Type: Universal
• Transport Package: Carton Box
• Specification: 400*300*300
• Trademark: SAILTON/STI
• Origin: China
• HS Code: 85043390
• Production Capacity: 50000 Sets/Year
• Package Size: 50.00cm * 40.00cm * 40.00cm
• Package Gross Weight: 25.000kg

Product Description

Resistance Mf Transformers DC Unit for Welder MF130

Application 

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.

 

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.
 

TYPE			Unit	MF130-R6130	MF170-R6170
primary nominal voltage			v	500	500
frequency			Hz	1000	1000
nominal power at 20%ED			kVA	130	170
nominal power at 50%ED			kVA	75	105
nominal power at 100%ED			kVA	50	80
secondary voltage			V	9	9
permanent DC current 100%			A	6000	8000
turns ratio			N1/N2	55:1	55:1
weight			kg	20	20
				2×150ºC,1×70ºC	2×150ºC,1×70ºC
temperature switch
				/Temperature switch	/Temperature switch
insulation class				F(155°C)	F(155°C)
Electrical connections	primary	thread	mm	M8	M8
		depth	mm	10	10
	secondary	thread	mm	M10	M10
		depth	mm	15	15
cooling water quant. Q              Tmax. 30ºC			I/ min	6	6
pressure drop p (Q=6l / min )			Mpa	0.6	0.6

 

Load endurance chart

MF130-R6130 4L/min load diagram Load diagram for MF130-R6130 4L/min	MF170-R6170 4L/min load diagram Load diagram for MF170-R6170 4L/min

 

 

• Circuit diagram names

• U, V Primary connection to PSI

• T1 Connection of temperature sensor for monitoring the primary winding

• Color coding: 2 x black (switch 1)

• 2 x white (switch 2)

• T2 Connection of temperatur sensor for diode monitoring:

• Color coding: 2 x red

• + , - Secondary connection to electrodes

Welding Power Rectifier Assembly and welding diode is available!






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