Product range
From 5 KVA distribution units to 25 MVA power and generator machines — oil, dry and package solutions.
Catalogue
Every design is capable of rigorous type and routine tests. Losses conform to BEE star labelling (Star 1–5) and energy-efficiency levels EEL1–EEL5 under the latest IS 1180 amendments.
3-phase / single-phase ranging from 5 KVA to 2500 KVA up to 66 kV class with off-load & on-load tap changers, with or without AVR and remote controlled tap changing panel. Oil-immersed or dry-type cooling.
5 KVA – 2500 KVA · up to 66 kV
3-phase ranging from 2500 KVA to 25000 KVA up to 66 kV class with off-load & on-load tap changers, with or without AVR & remote controlled changing. Built as critical grid components for long service life.
2500 KVA – 25000 KVA · up to 66 kV
3-phase / 1-phase from 10 KVA to 1000 KVA — 11/22/33 kV class with/without OLTC. Types include open wound, vacuum pressure impregnated (VPI), vacuum pressure encapsulated (VPE) and cast resin. Ideal for indoor sites where safety and limited space matter: commercial buildings, hospitals and data centres.
Open wound · VPI · VPE · Cast resin
Step-up transformers from 100 KVA to 25 MVA up to 66 kV class. The most important unit on a power station connecting generator output to the grid — typically oil-filled for efficient handling of continuous high load.
100 KVA – 25 MVA · up to 66 kV
Inverter-duty units for wind and solar energy. Multiple primary windings allow several inverters on the grid; earth shield between HV and LV windings reduces harmonics and residual resonance.
Renewable multi-winding duty
10 KVA to 2500 KVA designs that transfer AC power while isolating the load for safety or to reduce transients and harmonics. Special insulation between windings for high withstand between circuits.
10 KVA – 2500 KVA · galvanic isolation
Pre-fabricated, plug-and-play package substations from 100 KVA to 2500 KVA up to 33 kV primary. Compartments for HV circuit breaker, transformer and LV distribution; designed to IEC 62271, IEC 1331, IS 1180 and IS 2026. Optional APFC, metering, fire detection and OLTC.
100 KVA – 2500 KVA · up to 33 kV
3-phase / 1-phase from 100 KVA to 2500 KVA with or without OLTC. High secondary currents and wide voltage regulation for steel and melting applications, with electrostatic shield between HV and LV to reduce harmonics.
100 KVA – 2500 KVA · OLTC optional
Auto transformers from 25 KVA to 2500 KVA. Earthing / grounding transformers from 10 KVA to 2500 KVA for earth-fault protection. Booster transformers for feeder voltage regulation and railway stray-current control. Amorphous metal distribution transformers with ultra-low no-load losses — supporting Jaybee’s energy-conservation and CO₂ reduction goals.
Special applications · energy-saving cores
Maintain constant voltage irrespective of fluctuating supply — essential where motor loads, process machinery and sensitive equipment face daytime dips and night-time spikes. Used across engineering, pharma, cold storage, textiles, cement, food processing, hospitals and commercial facilities.
Plant-wide or machine-level protection
Design
Computer-aided methods on Jaybee in-house software shape every critical geometry.
Windings
Planned for flux density, no-load loss, load loss, impedance and related technical parameters.
Core & tank
Core frame for flux density and no-load loss; body and radiators for permissible temperature rise and clearances.
Accessories
Accessories and fittings designed per specification and customer requirements, aligned to latest IS amendments.
Share voltage ratio, impedance, losses and site conditions — we design to brief.
