RHONA’s Unit Substations offer a compact and reliable solution that integrates a substation-type transformer or cast resin transformer with its associated switching and protection systems—both on the primary and secondary sides.
These substations are ideal for industrial and mining applications, including underground installations, and are designed for fast deployment and operator safety. They can be connected to medium voltage switchgear, bus ducts, protection enclosures, breakers, and disconnecting switches.
For added flexibility, the entire system can be mounted on a common skid base, allowing full transportability or direct installation on concrete slabs without requiring multiple anchoring points.
Primary Input:
Three-pole air disconnect switch (up to 40.5 kV, 1250 A), with optional fuse protection
Vacuum or SF6 circuit breaker (up to 40.5 kV, 3150 A) with protection relays
Transformer:
Ratings up to 20 MVA
Voltages up to 34.5 kV (primary and secondary)
De-energized tap changers
Output:
Vacuum, air, or SF6 circuit breakers
Or bus duct connection
Fully integrated and pre-engineered
Compact footprint with enhanced operator safety
Ideal for quick deployment in remote or demanding environments
Compatible with underground mining and surface installations
Skid-mount or fixed base options available
RHONA’s Unit Substations combine engineering expertise and practical design, delivering high-quality, ready-to-install solutions tailored to your project requirements.
