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INVERTER CONTROLLED WELDING RECTIFIERS

Inverter controlled welding rectifiers are manufactured using high frequency switching device called Insulated Gate Bipolar Transistor (IGBT) and Ferrite core transformer. Input main supply is converted into DC using diodes and is INVERTED into AC using IGBT and the output voltage is stepped down using the ferrite core transformer. Subsequent rectification & filtering provides almost pure DC output for welding applications. Power source is very compact & weighs only 10% compared to transductor/ thyristor controlled machines. Efficiency and power factor for these machines are very high.

Input current for a given output in comparision to Thyristor/Transductor controlled machines, is only 50%. This amounts to tremendous savings. Weld quality is very good. Spatter level is negligible. Overall saving is quite substantial in comparision to Transdutor or Thyristor controlled machines. Inverterised machines can be incorported with advance welding features using micro controllers or otherwise, incorporating pre flow, post flow, up-slope, down-slope, pulsing frequency, background current, peak current etc.. Our inverstied welding rectifiers are specially designed for celulosic electrodes used in cross country pipeline applications.

TECHNICAL SPECIFICATIONS FOR OSTEC SERIES

TYPES	MODELS
TYPES	OSTEC - 200/250	OSTEC - 300/350	OSTEC - 400	OSTEC - 500	OSTEC - 600
INPUT SUPPLY	3PH,415v.±15%	3PH,415v.±15%	3PH,415v.±15%	3PH,415v.±15%	3PH,415v.±15%
MAX, INPUT KVA. AT 60% DUTY CYCLE 100% DUTY CYCLE	7.0/8.0 KVA 5.40/6.90 KVA	11.90/14.7 KVA 9.20/11.30 KVA	17.80 KVA 13.70 KVA	24.70 KVA 19.00 KVA	29.62 KVA 22.80 KVA
CURRENT RANGE (A)	3-200/250	3-300/350	3-400	3-500	3-600
CURRENT AT 60% DUTY CYCLE 100% DUTY CYCLE	200/250 154/193	300/350 231/270	400 308	500 385	600 462
OPEN CIRCUIT VOLTAGE	75-85 V	75-85 V	75-85 V	75-85 V	75-85 V
ENCLOSURE PROTECTION CLASS	IP23	IP23	IP23	IP23	IP23
CLASS OF INSULATION	H	H	H	H	H
COOLING	FORCED AIR	FORCED AIR	FORCED AIR	FORCED AIR	FORCED AIR
DIMENSIONS(WXDXH) IN MM	230x510x375	320x680x425	320x680x425	500x840x465	500x840x465
WEIGHT KGS	25 KGS	50 KGS	55 KGS	70 KGS	75 KGS

TECHNICAL SPECIFICATIONS FOR MINI WELD SERIES

The reliable power saving Inverterised Welding Rectifiers. A quality product from the house of high technology. Specially designed to meet your welding requirements. The machines are built to work under the extreme industrial/ field conditions. All products are designed, manufactured & tested under
one roof to ensure the quality.

Features

RELIABLE :
Designed to perform under extreme Indian Industrial and Climatic conditions.

l GUARANTEED PERFORMANCE :
Highly energy efficient, that outperforms other similar rectifiers. Excellent welding quality with all types of electrodes including aluminium. Rectifiers for Aluminium and cellulosic electrodes are supplied on request.

l AFTER SALES SERVICES :
Prompt response and speedy service. Least expensive, readily available spares.

Advantages & Benefits :

l Most reliable, least maintenance.

l Maximum power saving (Upto 60%).

MODELS	MINIWELD 100	MINIWELD 160	MINIWELD 230
INPUT SUPPLY	1 PHASE, 230 VOLTS, +/- 15%, 50/60 Hz
OPEN CIRCUIT VOLTAGE	70 to 90 VOLTS
CURRENT RANGE, A	3-100	3-160	3-210
CURRENT AT 35% DUTY CYCLE, A	100	160	210
CURRENT AT 60% DUTY CYCLE, A	80	122	160
CURRENT AT 100% DUTY CYCLE, A	61	95	124
ENCLOSURE PROTECTION	IP 23
INSULATION	CLASS F/H
COOLING	FORCED AIR
DIMENSION (WXDXH) MM	10X320X250	145X325X255	200X440X305
WEIGHT	5 KGS.	8 KGS.	13 KGS.

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