ND312T32W - 1200 Amp Circuit Breaker

ND312T32W - 1200 Amp Circuit Breaker

When you’re working with an existing electrical system, getting the breaker specifications right matters. The ND312T32W circuit breaker is a 1200A, 3-pole, Type ND N-Frame molded case circuit breaker designed for applications that require its specific combination of frame size, amperage, voltage ratings, and trip functions. It is HACR rated and carries interrupting ratings of 25k AIC at 600VAC, 50k AIC at 480VAC, and 65k AIC at 240VAC. The breaker features a thermal-magnetic design with an electronic circuit breaker configuration, non-interchangeable trip units, and independently adjustable short-time pickup and delay functions. At 16 inches high, 8.25 inches wide, and 5.5 inches deep, the ND312T32W is especially useful for maintaining compatible legacy electrical equipment where form, fit, and function must match the existing setup. One detail to check before installation: the catalog number does not include a rating plug or lug terminals. Built to last in its intended application, this breaker gives maintenance teams a clearly defined option when the system calls for these specific ND N-Frame characteristics.

Key Features and Benefits

• 1200A, 3-pole configuration for compatible three-phase electrical applications.
• The Type ND, N-Frame design simplifies identification when matching an existing breaker configuration.
• Thermal-magnetic molded case construction provides the specified circuit protection characteristics for compatible equipment.
• HACR rated for applications requiring this designation.
• Multiple interrupting ratings: 25 kAIC at 600VAC, 50 kAIC at 480VAC, and 65 kAIC at 240VAC.
• Independently adjustable short-time pickup and delay let you configure the breaker to meet applicable system requirements.
• Non-interchangeable trip units maintain the specified trip-unit configuration.
• Defined physical dimensions make it easier to confirm form and fit before installation.
• Designed to maintain compatibility with existing electrical distribution equipment when matching existing breaker specifications is important.
  

Technical Specifications

• Part Number: ND312T32W
  
• Type: ND
  
• Frame: N-Frame
  
• Breaker Type: Molded Case Circuit Breaker
  
• Poles: 3
  
• Amperage: 1200A
  
• Interrupting Rating at 600VAC: 25k AIC
  
• Interrupting Rating at 480VAC: 50k AIC
  
• Interrupting Rating at 240VAC: 65k AIC
  
• Trip Type: Thermal-Magnetic / Electronic Circuit Breaker Configuration
  
• Trip Unit: Non-Interchangeable
  
• Short-Time Functions: Independently Adjustable Pickup and Delay
  
• HACR Rated: Yes
  
• Height: 16.0 in.
  
• Width: 8.25 in.
  
• Depth: 5.5 in.
  
• Rating Plug Included in Catalog Number: No
  
• Lug Terminals Included in Catalog Number: No
  

Material Compliance and Certifications

• The provided specifications identify the ND312T32W as HACR rated. No additional agency certifications, environmental compliance declarations, or material-composition certifications were provided, so do not assume UL, CSA, RoHS, or other certifications without supporting product documentation.
• Because this is electrical protection equipment, verify compatibility against equipment requirements, breaker nameplate information, electrical system specifications, and applicable electrical codes before installation.
  

Where It Works Best

• The ND312T32W 1200A circuit breaker is best suited to compatible legacy electrical distribution systems designed around a Type ND, N-Frame, 3-pole breaker with matching electrical and physical requirements. It can be particularly useful in maintenance and replacement situations where changing the existing equipment configuration isn’t the goal—the priority is finding a breaker with the correct form, fit, function, amperage, voltage, interrupting capacity, and trip characteristics.
• Before installation, confirm the 1200A Rating, three-pole configuration, system voltage, required AIC rating, N-Frame dimensions, trip functions, rating plug requirements, lug requirements, and equipment compatibility. Qualified personnel should install and apply the equipment in accordance with the equipment requirements and applicable electrical codes.