Best in class reliability services to plan, assess and optimize the life cycle of your substations.
SUBSTATION
We approach each substation design-to-build project with care, knowing the investment and importance of bringing it to completion within your timeframe and budget.
We would like to say all of our honourable customers, users that our have one of the developing company in our country with the product of substation equipment, as like Transformer, HT Switchgear, LT Switchgear, PFI Plant, MDB, SDB and Generator. Emphasising on clients Interest we are committed to meet our valued client needs in the most befitting way. We pledge to use our resources quality and effectively to solve your problem with the right and complete solution for your project, Sales, Service, Spare support system integration or system management and monitoring control.
We started making of world class switchgear equipment incorporating a number of committed engineers. We started manufacturing of transformers and switchgears. Our engineers are closely related with
international professional bodies like IEEE & ASME and accordingly updating their technologies with latest developments.
We have high skilled engineers and technician to manu- facture of Distribution and Power Transformer (3 Phase). Though transformer are designed on requirements of valued customers according to IEC (International Electro Technical commission) ANSI (American National Stand- ard Institute) BS, VDE. Though Transformer are rating from 50 KVA to 10,000 KVA among this Distribution Trans- former rating from 5 KVA to 10,000 KVA system voltage 11kv or 33 kv. We are maintaining its continuous improve- ment in design and product quality by using the modern production technique with latest technology and experi- ence.
At last we want to say that all of our staff recognizes that client satisfacGon is of paramount importance.
As consistent guarantee of the highest quality, Distribution Transformers are manufactured from cold rolled grain oriented (CRGO). Quality control is carried out at all stages of production while final routine and type tests are performed in our well equipped testing laboratory according to IEC-76, BDS 1081, ANSI, AEC and BSTI standards.
We Offering
We offers extensions, upgrades and retrofits of all kinds for transmission and distribution substations and infrastructure.
Upgrades
Techno Haven BD has comprehensive experience in equipment installation and commissioning projects across the world
Installation
Our comprehensive domain knowledge and experience enables us to offer diagnostic services as well as maintenance contracts and perform service operations efficiently
Maintenance
Design
Standards: IEC 76, BDS-1081, ANSI, VDE.
Frequency: 50Hz, 60Hz (on request)
Ratings: 25 KVA – 10,000 KVA
Primary volt: for values above 24 kv and up to 36 kv. Double high voltages 15-20kv
Tapping: 2.5 %; + 5 % or 1 2 x 2.5 %; -7.5%
Secondary volt: 415 to 440V other values may be offered Double low voltages with 7 LV bushings can be offered with full rating on both voltages or with reduced rating (75%) on load.
CORE & COIL
High grade grain oriented silicon steel. The special cutting and stacking methods result in low no load losses and noise levels. Wound on mandrel, the core is
annealed at the highest temperature of 800 degree centigrade to relieve mechanical stress and fix into the design shape.
Low Cold rolled grain oriented silicon steel strip. The core is built with laminations of voltage coils are normally larger layer wounds using paper insulated copper conduc- tor. Circular type and rectangular type windings are respectively used for relatively large or small type
of transformers. The coil has to allow the liquid insulation for cooling. It causes uniform heat dissipation due to losses. The round conductor windings consist of individually wound coil sections connected in series to produce phase winding. We use high grade Imported copper for winding and export quality super enamel from gazi wires for HT windings. HT and LT coils are checked for inner diameter, outer diameter, axial length, number of turns and resistance.
TESTING
During the entire manufacturing process the transformer is approved by BSTI, BUET, MSTI, Electrical licensing authority of energy ministry, IEC76/BDS1081, Test certificates are issued for all the tests on request.
Routine Test
- Insulation resistance test
- Winding resistance test
- Voltage ratio & polarity test (vector group test)
- Load loss & impedance voltage measurement
- No load loss & exciting current measurement
- Insulation resistance test
- Dielectric strength test of oil
- Power frequency voltage withstand test.
- Core insulation test
- Function of tap changer test.
- Heat-run test at ONAN and ONAF rating
- Short-circuit test
Type Test
- Impulse voltage withstand test
- Temperature rise test
- Over load test
- Noise level test
- Oil leakage test
Single Phase Transformer
Pole mounting distribution transformers are manufactured in two types:
Conventional and self protected type
According to the distribution systems, the transformer may have one or two high voltage bushings.
Conventional type
The conventional type transformers are furnished with accessories as per relevant applicable standard.
Self protected type
the complete self protected transformers have the following devises
- Lightning arrestor
- Primary fuse link
- Secondary circuit breaker
- Signal lamp
Three Phase Transformer
The three phase distribution transformers are manufactured for indoor or out door use and in the pole mounting or ground mounting type.
FEATURES
Low loss and efficiency by using cold rolled grain oriented silicon steel with high permeability. Transformer tank is filled with oil under vacuum thus improving the complete penetration of insulating liquid. The high coil-to-coil and low coil-to-ground capacitance raGo provides distribution of surge voltage over the entire coil. Smart out line by the latest methods of automatic machining. Oil preservation systems depending upon transformer rating to prevent the deterioration of transformer insulating. Paraffin based mineral oil is used for best cooling effect. Dial thermometer with or without contacts and Buchholz relay are used as per customer request. Transformer is compact design and use friendly. Arcing horns are use in proper distance.
WARRANTY
Low loss and efficiency by using cold rolled grain oriented silicon steel with high permeability. Transformer tank is filled with oil under vacuum thus improving the complete penetration of insulating liquid. The high coil-to-coil and low coil-to-ground capacitance raGo provides distribution of surge voltage over the entire coil. Smart out line by the latest methods of automatic machining. Oil preservation systems depending upon transformer rating to prevent the deterioration of transformer insulating. Paraffin based mineral oil is used for best cooling effect. Dial thermometer with or without contacts and Buchholz relay are used as per customer request. Transformer is compact design and use friendly. Arcing horns are use in proper distance.
