Pad mounted substations
A padmount or pad mounted transformer is a ground mounted electric power distribution transformer in a locked steel cabinet mounted on a concrete pad. Since all energized connection points are securely enclosed in a grounded metal housing, a padmount transformer can be installed in places that do not have room for a fenced enclosure.
Pad-mount transformers are available in various electrical and mechanical configurations. Pad-mount transformers operate on medium-voltage distribution systems, up to about 35 kV. The low-voltage winding matches the customer requirement and may be single-phase or three-phase.
Features
- 50 Hz
- 55/65° C temperature rise
- High fire point liquid : FR3, Silicone or Beta Fluid
- Dial type thermometer
- Liquid level gauge
- Pressure vacuum gauge
- Pressure vacuum gauge with bleeder
- Pressure relief device
- Secondary molded case breakers
- Gauges furnished with alarm contacts
- Bay-O-Net fuses
- Weak link cartridge fuses
- Current limiting fuses
- Loadbreak switch(es)
- MOV surge arresters, including under-oil or elbow
- Secondary current transformers
- Total stainless steel or hybrid (mild steel/ stainless steel) construction
- Secondary metering compartment
Cast Resin Dry Type Transformer ( CRT)
Cast resin dry type transformer (CRT) is used in the high moisture prone areas. It is because of its primary and secondary winding are encapsulated with epoxy resin.
Vacuum Pressure Impregnated Transformer (VPI)
This type of transformer is made with mini-mum flammable material as insulation of windings. The windings of this transformer are made in strip in a continuous layer.