Core Performance & Application of Eaton NS3-400-NA Isolation Switch
The Eaton NS3-400-NA is a 400A 3-pole molded case disconnect switch built on the NZM3 frame. Featuring excellent breaking capacity and reliable safe isolation, it is ideal for main circuits of heavy-duty low-voltage power distribution and main power supply of equipment.
Backed by the proven industrial NZM3 frame, it achieves a high breaking capacity of 100kA at 480V AC and maintains 50kA at 600V AC, readily handling high-fault-current conditions such as large transformers and busbar trunking systems.
Designed with universal standard NZM3 dimensions for easy installation and replacement, it comes with a front-mounted operating handle for straightforward operation. It is also compatible with expandable accessories including motor operators and auxiliary contacts, widely applied to industrial incoming feeders and automated complete equipment.
Application Scenarios of Eaton NS3-400-NA
● Ultra-high 100kA breaking capacity, withstand heavy current surges and unexpected fault shocks
● Reliable isolation performance ensures safer maintenance with smooth operation, effectively preventing on-site misoperation
● Fully compatible with all NZM3 series accessories for flexible function expansion
● Adopts universal NZM3 mounting dimensions, space-saving and highly adaptable, ideal for new installations and retrofits
Eaton NS3-400-NA Technical Specifications
● Model:Eaton NS3-400-NA
● Number of Poles: 3 Pole
● Rated Current: 400A
● Frame Size: NZM3
● Rated Operating Voltage: AC 600V (UL Standard) / AC 690V (IEC Standard)
● Core Functions: Circuit switching control, electrical safe isolation
Same Series Selection Guide
● NS3-250-NA: 3-pole 250A molded case disconnect switch with NZM3 frame, suitable for medium and small-capacity circuits
● NS3-400-NA: 3-pole 400A molded case disconnect switch with NZM3 frame, mainstream universal model for large-capacity circuits
● NS3-600-NA: 3-pole 600A molded case disconnect switch with NZM3 frame, dedicated for extra-large-capacity circuits
Design Highlights
Improve efficiency
Materials：The housing is made of high-strength flame-retardant insulating engineering plastic with qualified insulation performance to eliminate electric leakage risks.
Appearance：It features a neat and compact overall structure with a width of only 140mm, saving cabinet space and allowing side-by-side installation with other same-frame devices.
Design：Rounded anti-slip corners prevent slipping and collision damage during disassembly, assembly and transportation.
Aftersales Support
Quantity available: In stock.
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Warranty: 12 months.
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Lead time: Shipment within 3-5 working days.
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Terms of payment: T/T. RMB (CNY) support.
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Courier partners: FedEx, DHL, UPS, TNT, EMS, SF express.
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FAQ
Q1: Is Eaton NS3-400-NA a circuit breaker or a disconnect switch?
A1: The NS3-400-NA is a molded case disconnect switch (load break switch). Its core functions are circuit switching and electrical safety isolation. It has a rated breaking capacity to switch load current normally, yet it offers no overload or short-circuit protection. If protection functions are required, opt for molded case circuit breakers from the NZMN3 series of the same frame size.
Q2: What is the breaking capacity of the NS3-400-NA?
A2: This model has a rated ultimate short-circuit breaking capacity of 100kA at 480V AC and 50kA at 600V AC. As a high-breaking-capacity variant of the NZM3 frame, it safely handles high-fault-current conditions in heavy-duty power distribution circuits.
Q3: Can the NS3-400-NA be operated remotely via motor drive?
A3: Yes. It supports installation of dedicated NZM3 motor operators. Paired with auxiliary contacts, it enables remote opening/closing and status signal feedback, meeting control requirements for intelligent power distribution systems.
Q4: How can I place an order or apply for bulk purchase discounts?
A4: Send your required order quantity via email to Irene8866@163.com, or leave us a message on WhatsApp (+86 18950163907). We will reply within 24 hours with formal quotation and stock confirmation.
For more product information, please contact our professional sales team to obtain the latest pricing and stock information for the Eaton NS3-400-NA!
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