Asco 300 MUS Manual Transfer Switch (3Ph, 4P, 250A)

This ASCO Series 300 (MUS) Service Entrance Manual Transfer Switch is designed to manually transfer 3-Phase 4-Pole Switched Neutral loads up to 250A. Ideal for commercial, telecom, municipal, healthcare, and light industrial applications.

FEATURES

• Ideal for manually switching to a temporary generator during a power outage.
• Can be used to satisfy NEC 700.3 requirements to provide connection to a temporary generator while a permanent generator is being serviced.
• Manual operating handle with center-off position.
• ASCO’s reliable, field-proven, transfer switching technology.
• Modular compact design is easy to install and maintain.
• Molded Case Circuit Breaker with Thermal Magnetic Trip on the Utility Side for Service Entrance Rating.
• Floor-mounted NEMA 1 indoor enclosure or NEMA 3R secure outdoor enclosure (see options below for other enclosures).
• Optional Accessory 170 offers LED indicators and Form C contacts for switch position and source availability, and the further options of phase rotation monitoring, a maintained engine start switch, and an IO module for building management system integration (See Accessories below).
  
• UL 1008 Listed and UL 891 Listed.

DOWNLOADS

Asco 300 Manual Transfer Switch Brochure

Asco 300 Frame J Operator’s Manual

Asco 300 MUS Frame J 150-400A NEMA 1 Drawing

Asco 300 MUS Frame J 150-400A NEMA 3R Drawing

Asco 300 Warranty

TRANSFER SWITCH OPTIONS

Please Call to Order Transfer Switches With These Options:

• Other 60Hz three phase voltages – up to 600 VAC.
• 50Hz frequency/voltages.
• Other enclosures: UL Type 4 Secure, UL Type 3RX Secure (316) Stainless Steel, or UL Type 4X Secure (316) Stainless Steel.

Please Note: Some Specs (including withstand ratings, dimensions, and weights) may vary with some of the options above.

OPTIONAL ACCESSORIES

• Accessory 170 User Interface/Annunciation – Offers LED indicators and Form C contacts for transfer switch position and source availability. Can be configured with or without phase rotation monitoring, a keyed or unkeyed maintained engine start switch with common alarm LED/contact, and an IO module for building management system integration. (Factory-installed – must be ordered with the transfer switch)
  
• Accessory 44G Strip Heater – Prevents condensation and freezing of condensation. Wired to load terminals: 208-240V or 480-600V. Contains wiring harnesses for all transfer switch sizes. Includes thermostat. (Available as a factory-installed option or can be installed later as a field kit)