Mahati Electrics Daund, Pune, Maharashtra

Using On Load Tap Changers The OLTC’s select taps on regulating winding on the furnace transformer A separate auto transformer is provided and the output tap is selected by OLTC. In the auto transformer control there are two construction variants : 1. All in one tank 2. Furnace in one and auto + OLTC in other Manufacturing Range Both single phase and three phase versions. Self regulating winding type Regulation by separate auto transformer Primary voltage : 3.3/ 6.6 / 11/ 22/ 33 KV Secondary voltage: as per process requirement KVA range - 1 phase 500 KVA to 18000 KVA3 phase 1000 KVA to 60000 KVA

 No Load losses minimized by using CRGO steel. The Core assembly of step lap construction has minimum losses. Core is tightly pressed and bound by glass reinforced resin tapes. Proper insulation is provided between clamping channels and the entire assembly is insulated from tank by insulating packing. Prime CRGO lamination is used. Cut and assembled to achieve a near perfect-circle core cross section, resulting in the efficient use of materials plus a lighter, more compact, high performance transformer Welding process produces deep penetration welds, virtually eliminating leakage from welded tank joints. Inside tank surfaces are sand blasted and painted with heat resistant paint. Transformer exterior coated to a minimum thickness of 3 mils; this coating has superior endurance characteristics. Detachable radiators with/without fansPressed and vacuum treated coils. Welding process produces deep penetration welds, virtually eliminating leakage from welded tank joints. Inside tank surfaces are sand blasted and painted with heat resistant paint. Transformer exterior coated to a minimum thickness of 3 mils; this coating has superior endurance characteristics. Detachable radiators with/without fansPressed and vacuum treated coils of prime quality are used and duly pressure tested. OLTCs and OCTCs are of Easun MR/CTR. Recently for an export order, dry type OLTCs were used.the right of this text. Key Customers • Steel industries• Sugar Factories• Auto Industries•  Military engineering services• All HV & EHV consumers• State electricity boards• Co-genertion plants  

This is a process to refine the steel melt (obtained generally from Direct Arc furnaces). This transformer can be at 50 cycles or higher frequencies (where rectifier inverter combo is used). Mahati make Laddle Transformers range- Voltage: 3.3, 6.6, 11, 22, 33KV KVA : 1000KVA to 15000KVA

Mains frequency These are used for melting of metal however recently the secondary supply of specified voltage is directly fed to the induction furnace coil.     Medium frequency The secondary is fed to a rectifier inverter combo which increase the frequency to medium frequency at designe d voltages which then is fed to the furnace. We make all desired types including special ones like the 12 pulse, 24 pulse versions. The various combination are : Single transformers with 2 LVs (star & delta) Two transformers in one tank to give 12 pulse output Four transformers in one tank to give 24 pulse output.   Range: Voltage : 3.3, 6.6, 11, 22, 33KV KVA : 250 KVA to 16000 KVA Inverter output - 6 pulse, 12 pulse and 24 pulse.

This is a modern and special steel manufacturing processor for high quality steel required in special application like nuclear, missile, battle tank, Ships etc.         The electrical equipment consists of a high current single phase transformer which in our manufacturing program and a very sensitive high current and medium voltage regulator which has a moving brush on the LV helical winding giving a very fine voltage control. Range:- up to 40KA secondary current

With increasing importance of safety and environmental aspect in modernized and compact commercial applications, Dry type transformer demand is increasing. There is no oil used in the Dry type transformers. A special type of fire resistant insulation is used to reduce the fire risk considerably. Major application areas -- Mining, hotels, high rise buildings, hospitals, malls, shipping.     Mahati has following two types of dry type transformers to offer : cast resin vacuum impregnated Mahati make dry type transformers are now in use for over five years. Range:- KVA rating : 100KVA to 5000KVA (36KV class).

These are used for various applications and are made in shunt or series types. The construction features further categorize them as- Air core type air cooled.

Application : Electricals Use

Voltage : AC

Frequency : 50hz, 60hz

Automatic Grade : Automatic

Warranty : 2yrs

Phase Type : Double Phase

Coolling System : Air Cooling

We have manufactured equipments for hydro status up to 300 MW. We have manufactured H.V test kits up to 100 KV