Why Choose the ABB EPX-4003SD 400A 3-Pole Switch Disconnector?
The ABB EPX-4003SD, manufacturer order code 1TVS151800S3362, is a 400 A three-pole switch disconnector based on the ABB Tmax XT5 platform. Designed for compatible ABB Protecta Power 400 A panelboards, this incoming device provides a dedicated manual switching and isolation solution for professional low-voltage electrical distribution assemblies.
Officially described as the EPX-4003SD 400A 3P SD - XT5, the product combines a 400 A device rating with a three-pole configuration. It is intended for applications where the electrical design requires simultaneous switching of three phase conductors through an appropriately rated incoming switch-disconnector arrangement.
ABB lists the EPX-4003SD within its Protecta Power 400 A panelboard incoming devices – non-automatic switch disconnectors category. Unlike a moulded-case circuit breaker fitted with a protective trip unit, a switch disconnector is intended for switching and isolation rather than automatic overload or short-circuit protection.
For electrical contractors, switchgear manufacturers and professional panel builders, the ABB EPX-4003SD provides a manufacturer-designated incoming device option for compatible Protecta Power installations. Its XT5 platform, three-pole arrangement and dedicated ABB order code help support coordinated selection of incoming equipment and associated connection accessories.
Key Advantages
- 400 A rated switch disconnector for suitable low-voltage distribution applications.
- Three-pole configuration for switching and isolation of three-phase conductors.
- Based on the established ABB Tmax XT5 device platform.
- Manufacturer-listed incoming device for compatible ABB Protecta Power 400 A panelboards.
- Provides a dedicated non-automatic switching and isolation function.
- Supports coordinated selection of compatible ABB incoming connection accessories.
- Offers a clearly defined alternative to automatic protective MCCB incoming devices.
- Suitable for professional electrical distribution panelboard construction.
- Part of ABB's modular Protecta Power incoming switching range.
- Dedicated ABB order code 1TVS151800S3362 simplifies product identification and procurement.
Key Features
- ABB EPX-4003SD incoming switch disconnector.
- 400 A device rating.
- Three-pole (3P) configuration.
- ABB Tmax XT5 device platform.
- Non-automatic switch-disconnector functionality.
- Designed for compatible ABB Protecta Power 400 A panelboard arrangements.
- Manual switching of the designated incoming three-phase circuit.
- Isolation functionality when installed and operated within the approved device and assembly ratings.
- Manufacturer-listed alternative to the EPX-4004SD four-pole switch disconnector.
- Associated with the EPX-4003CK three-pole XT5 incoming connection kit.
- ABB Protecta Power selection literature identifies a maximum XT5 cable capacity of 185 mm², subject to terminal compatibility.
- Compatible front extended terminal options may be available for suitable cable lug arrangements.
- Intended for integration into professional low-voltage distribution assemblies.
- Requires appropriate overcurrent and short-circuit protection within the electrical installation.
- ABB manufacturer order code 1TVS151800S3362.
ABB Tmax XT5 Incoming Switching for Protecta Power Panelboards
The ABB Protecta Power range provides modular low-voltage distribution panelboards for commercial and industrial installations. The system supports several incoming device arrangements, allowing electrical designers to select equipment according to the required current rating, number of poles, switching function and protective characteristics.
The ABB EPX-4003SD is identified in the manufacturer's Protecta Power product selection information as a 400 A three-pole XT5 non-automatic switch disconnector. It is listed among the incoming device options for the 400 A Protecta Power panelboard range, providing a suitable device selection where the approved assembly requires a 400 A three-pole incoming isolation arrangement.
ABB's 400 A Protecta Power panelboard family includes the EPX-PB408 8-way, EPX-PB412 12-way and EPX-PB418 18-way variants. These panelboards provide different outgoing circuit capacities while retaining the same nominal 400 A busbar rating. The incoming device must be selected according to the completed assembly rather than the panelboard's number of outgoing ways alone.
The three-pole configuration of the EPX-4003SD is intended for simultaneous switching of three phase conductors. It differs from the EPX-4004SD, which provides a four-pole XT5 arrangement. The appropriate choice depends on the electrical installation's conductor configuration, neutral switching requirements, earthing system and applicable regulations.
A key distinction is that the EPX-4003SD is a switch disconnector rather than an automatic protective circuit breaker. It is intended to provide switching and isolation, but it does not independently detect overloads or short circuits through an MCCB protective trip unit. Suitable upstream or associated protection must therefore be incorporated into the overall electrical design.
For integration with the Protecta Power busbar arrangement, ABB offers the EPX-4003CK as the corresponding 400 A three-pole XT5 incoming connection kit. This connection accessory must be selected according to the applicable panelboard configuration. It should not be assumed to be included with the EPX-4003SD unless the supplier's pack contents explicitly confirm its inclusion.
ABB's Protecta Power selection literature identifies a maximum cable capacity of 185 mm² for XT5 incoming devices. This is a general manufacturer-stated reference for the device platform and does not guarantee compatibility with every cable construction or termination arrangement. Final conductor sizing must consider the installed terminal type, conductor material, cable lug dimensions and installation requirements.
For applications requiring lug-type terminations, ABB also identifies front extended terminals as an available option within its incoming device accessory range. The exact terminal accessories, cable supports, protective shrouds and connection components must be confirmed against the approved assembly and the manufacturer's installation instructions.
Where automatic overload and short-circuit protection is required at the incoming device, ABB provides separately designated MCCB alternatives, including the EPX-4003MCCB. Choosing between a switch disconnector and an MCCB requires consideration of protective coordination, prospective fault current, operational requirements and the intended function of the incoming device.
The EPX-4003SD is an incoming switching device, not a complete electrical distribution panelboard. The finished installation may also require a compatible enclosure, incoming connection kit, outgoing protective devices, metering equipment and other accessories. All components must be selected and assembled in accordance with the applicable ABB documentation and electrical installation requirements.
Typical Applications
- Compatible ABB Protecta Power 400 A panelboard incoming arrangements.
- 400 A three-pole incoming switching and isolation.
- Commercial building low-voltage electrical distribution.
- Industrial MCCB distribution panelboard installations.
- Main and sub-distribution boards requiring suitable incoming isolation.
- Electrical plant rooms and switchgear assemblies.
- Office buildings and commercial developments.
- Retail centres and mixed-use properties.
- Warehouses and logistics facilities.
- Manufacturing plants and industrial premises.
- Professional switchgear manufacturing and panel building.
- Compatible ABB Protecta Power incoming device replacement projects.
