Padmounted

Padmounted refers to electrical distribution equipment that is installed on a concrete pad at ground level, typically outdoors along streets or in commercial and residential areas. The term commonly applies to padmounted transformers and padmounted switchgear, which are used to connect underground or overhead feeders to consumers.

A padmounted unit is designed to step down medium-voltage power to low voltage for end users. Padmounted transformers are usually three-phase, enclosed in a weatherproof steel cabinet, and may be oil-filled or dry-type. The equipment is connected to feeders through primary bushings on the exterior and to customer service conductors via secondary bushings inside the enclosure. Access is controlled by locked doors or panels to prevent tampering and accidental contact with energized parts.

Construction and features emphasize outdoor suitability and safety. The unit sits on a concrete pad with adequate clearance for maintenance and ventilation, and is often fenced and alert with warning signs. Oil-filled transformers include containment measures for leaks, temperature and oil-level monitoring, and ventilation provisions. Dry-type units use cast resin insulation and do not require oil containment. Some configurations integrate switching or protection equipment, such as fuses, breakers, or a switchgear compartment, within the same cabinet.

Usage and considerations. Padmounted equipment is common where underground networks are preferred or required, offering reliable service with a reduced above-ground footprint. They require regular maintenance, including inspections, oil testing when applicable, and ensuring proper operation of safety features and clearances. Regional standards and utility practices govern installation, grounding, and accessibility.