Description

The quality of Square D Masterclad™ Medium Voltage Metal-Clad Switchgear stems from a design and manufacturing process that focuses on long-term switchgear performance with the highest degree of reliability. Reliable performance and safety are enhanced by the rugged construction of Masterclad switchgear. The switchgear consists of individually grounded, compartmentalized steel structures to protect operating personnel and equipment.

Masterclad switchgear components include available state-of-the-art electronics like ION power quality monitoring and EASERGY protective relays, EcoStruxure™, integrated racking, and automatic throwover systems.

Standardization of the design incorporates a series of basic modular units, control packages, and instrumentation. For most switchgear ratings, circuit configurations, and functions, one basic size unit is used. These features provide application flexibility, versatility, and efficiency, reducing lead time and engineering time spent on planning and laying out the switchgear. 

Standard features

• Air-insulated switchgear defined by ANSI C37.20.2

• UL listed equipment

• Indoor and outdoor options with one or two high breaker arrangements

• Also available as arc resistant structurestype 2B for 5 and 15 kV class

• Removable (drawout) circuit breaker

• Compartmentalized enclosure with grounded barriers

• Isolated low voltage compartment

• Automatic gear driven shutters

• Automatic shutters in VT, CPT, and fuse truck compartments

• Epoxy insulated busbars

• Mechanical interlocks

• Disconnect style instrument transformers

• Continuous grounded breaker and auxiliary trucks, in and between test/disconnected and connected positions

 Parameter

• 16.5–27 kV

• 1200–2000 Amperes Continuous Ratings

• 16, 25, and 40 kA Symmetrical Interrupting Capacity

• 125 kV BIL, peak (impulse) dielectric withstand

• 60 kV, rms 1 minute 60 Hz dielectric withstand

• NEMA Type 1 – Indoor enclosure

Structural diagram

27 kV Layout Dimensions