Medium Voltage Soft Starters

Medium Voltage starters are designed to start AC motors in any fixed speed application. They provide maximum protection with “True Thermal Modeling,”while allowing smooth, stepless control of acceleration and deceleration.

Features:
• Advanced motor protection relay and ramp features, programmable via the keypad or a laptop computer.
• Fiber optically isolated low voltage compartment with up to 110kV BIL rating for safety and reliability.
• Built-in 120V control power transformer; voltage and current metering.
• Load-break / fault-make rated disconnect switch with door safety interlocking.
• Visible grounding bar for a safe operation.
• Coordinated motor fuses with blown fuse indicators.
• Line isolation vacuum contactor.
• Fully rated bypass contactor for increased thermal capacity and optional across-the-line starting.
• Heavy duty SCR stack assemblies with ring transformer isolation for reliable SCR gate firing.
• RTD Option accepts up to 12 RTD inputs.
• Zero sequence ground fault protection option.
• Top entry, bottom exit with room for stress cones. Removable entry plates for easy connection.
• NEMA 12 gasketed enclosure (NEMA 3R optional)