Techno Electronics System, Delhi, DC Motor & Transformer
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The document describes 'Power Select', an ISO 9001:2008 certified company specializing in a range of variac devices for precise control of AC voltage. These variacs, suitable for single and three-phase operations, are designed for smooth, continuous output and various applications including auditorium lighting and laboratory testing. Key features include robust construction, high efficiency, and the option for motorization for remote operation.
Techno Electronics System, Delhi, DC Motor & Transformer
- 1. An ISO 9001:2008 Certified Company
- 2. ‘POWER SELECT’ is a registered trademark of our company. It is the most effective device for stepless, breakless & continuous control of AC voltage & therefore for various parameters, dependent on AC voltage. The basic Variac is meant for operation from a nominal input voltage 240V AC & can give output voltage anywhere between 0-240 V or 0-270 V AC by simple transformer action. Three such Variac connected electrically in star and mechanically in tandem, become suitable for operation from a nominal input voltage of 415V 3ph AC and can give output anywhere between 0 to 415V or 0 to 470V. Simple, rugged construction. Coil made from high grade CRGO Silicon Steel & 99.9 pure copper. Output voltage variation is smoth, continuous, breakless & linearly proportional to angular rotation. High efficiency. Negligible waveform and power factor distortion. Excellent short time overload capacity. Remote operation possible by motorization. Wide range of current ratings. High quality carbon brush used for current collection. MODEL Flush Open Manual (Air Cooled)------------F Portable Enclosed Manual (Air cooled)---P In Tank Manual (Oil Cooled)-----------------T ‘F’ , ’P’ , ’T’ suffixed by ‘M’ means motor operated models. OPERATING VOLTAGE For single phase -- 240V AC, 50 - 60 Hz. 1ɸ. For three phase -- 415V AC, 50 – 60 Hz. 3ɸ - 4 wire. CURRENT RATINGS For oil cooled models, maximum current & continuous Current are one and the same. For air cooled models, the ratings are as shown below Maximum Current 2 4 8 10 15 20 28 Continuous Current 1.8 3.8 6.5 9 11.5 16 22 OPERATING TEMP. 0⁰ - 45⁰C. INSULATION RESISTANCE Not less than 5M ohms at 500V DC. DIELECTRIC TEST 2.5kV RMS for 1 minute. STORAGE TEMP. -9⁰C to 70⁰C HUMIDITY Up to 95% RH Notes: 1) As output voltage is continuously variable, Variac are rated in terms of current that can be drawn from the output. 2) Oil should be Transformer Oil conforming to IS 335, IEC 296.
- 3. Single phase Variacs are available in 3 types. Portable type (P) with sheet steel enclosure for floor/table mounting. Flush type (F) with open type construction. Suitable for panel mounting. Tank type (T) immersed in oil in sheet steel tank with roller mounting. Three phase Variacs are usually ganged assemblies of 3 coils, available in all three types: ‘P’, ‘F’, and ‘T’. Higher rating Variacs (above 200 Amps) uses 2/3 or more coils in parallel with load balancing arrangements. Motorized Variacs uses 240V AC step-Syn Motor having 60 rpm speed at lover speed can be achieved. Standard gear ratios used provide sweep time of 8, 15, 30, 45, 60, 120 secs. (As per code specified below) 1st Block Output current rating amps 2,4,6,8,10,15,20,28,32,35,40,50,60,75,80,100,125,150,200 ,300,400,500,600,800,1000,1200,1600Amp 2nd Block Variac Continuously variable voltage auto transformer. 3rd Block Type of construction F,P,T F = Flush, back of panel, Open. P = Portable, Floor, table mounting, air cooled with enclosure T = In tank, immersed in oil. 5th Block Provide with motor drive (M) “step-syn” 230V 1Ph AC 50Hz. 60rpm motor having instantaneous start-stop-reverse characteristics. 6th Block Approx. time in secs. For full rotation sweep time. 8,15,30,45,60,120 (As per standard gear ratios available) e.g. 1 2 3 4 5 6 75A Variac with 3 coils (Three phase) in oil-cooled 75 V 3 T M 15 tank construction with motor drive having 15s sweep 1 2 3 4 8A Variac with 1 coil (single phase). Portable type & 8 V I P Suitable for manual operation (no motorization) Similarly, other Variacs can be configured & ordered. Auditorium, Hotels, Conference Halls, Exhibitions, Laboratories etc. AC Voltage Stabilizers, Rectifiers, Battery Charger. Temperature control of Ovens, Furnaces. Testing of Instruments, Relays and Circuit Breakers etc. Welding, Electro-plating, Anodizing etc. Collages & Universities.