Application:
Pad-mounted transformers are used in underground distribution systems. Their sealed high-voltage and low-voltage safety compartments ensure their safe operation and reduce the risk of accidents, making them ideally suited for use in residential applications, tourist sites, hotels and other buildings. Pad mounted transformers are placed inside a cabinet with doors and locks, usually located outdoors, with dead-front medium-voltage terminals. Single-phase transformers are designed to operate from the primary under a line-ground system, in order to avoid magnetic ferroresonance effects.
These transformers come in two basic configurations: radial and loop feed, which are selected based on the type of circuit on which the transformers will be installed.
Radial configuration: the transformer is connected to the primary feeding line and does not allow continuation of the line through the equipment.
Loop configuration: The transformer is connected to the primary feeding line and allows other loads to be fed through it.
Scope of the offer:
Manufactured in compliance with applicable NTC, IEC and ANSI standards and/or individual customer specifications.
Ratings (kVA):
Single Phase: 15 kVA to 500 kVA. Three-phase: 30 kVA to 2500 kVA.
Basic Insulation Level:
Up to BIL 150 kV
Typical construction mode:
Pad-mounted Transformers typically consist of an active part made up of the core (magnetic circuit), the coil (electric circuit) and the yoke clamp, which is determined in accordance with the type of transformer, placed in a tank that provides the equipment with specific features, depending on its intended application.
Coils:
·Rectangular sections and concentric copper or aluminum windings.
·Insulation: High-quality paper with epoxy resin coatings.
Cores:
·Shell Type or Core Type, wound, step-lapped for easy assembly and disassembly without loss of dimensional characteristics, guaranteeing low losses and excitation currents.
·Materials: Cold-rolled grain-oriented silicon electrical steel sheet with insulating coating on both sides, low core loss and high permeability.