Why Choose the ABB EPX-2504SD 250A 4-Pole Switch Disconnector?
The ABB EPX-2504SD, manufacturer order code 1TVS151800S3361, is a 250 A, four-pole switch disconnector based on the ABB Tmax XT4 platform. Designed as an incoming device for compatible ABB Protecta Power 400 A panelboards, it provides a manufacturer-specified solution for manual switching and electrical isolation within low-voltage distribution assemblies.
Officially described as the EPX-2504SD 250A 4P SD - XT4, this product combines a 250 A device rating with a four-pole configuration. It is intended for installations where the electrical design requires an appropriate four-pole incoming switch-disconnector arrangement rather than a three-pole device.
The EPX-2504SD belongs to ABB's Protecta Power Enclosures product group and is listed among the range's non-automatic incoming switch disconnectors. Unlike a moulded-case circuit breaker equipped with a protective trip unit, a switch disconnector is intended primarily for switching and isolation. It must therefore be incorporated into an electrical installation with the necessary overcurrent and short-circuit protection.
For electrical contractors, switchgear manufacturers and professional panel builders, the ABB EPX-2504SD provides a clearly identified incoming device option for compatible Protecta Power assemblies. Its relationship with the ABB XT4 connection system supports coordinated product selection when specifying the incoming device, connection kit and associated panelboard components.
Key Advantages
- 250 A rated switch disconnector for suitable low-voltage distribution applications.
- Four-pole configuration for electrical installations requiring four-pole switching and isolation.
- Based on the established ABB Tmax XT4 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 ABB incoming connection accessories.
- Distinct from an MCCB, helping designers specify the appropriate device function.
- Suitable for professional electrical distribution panelboard assembly.
- Part of ABB's modular Protecta Power incoming device range.
- Dedicated ABB order code 1TVS151800S3361 supports accurate specification and procurement.
Key Features
- ABB EPX-2504SD incoming switch disconnector.
- 250 A device rating.
- Four-pole (4P) configuration.
- ABB Tmax XT4 device platform.
- Non-automatic switch-disconnector function.
- Designed for suitable ABB Protecta Power 400 A panelboard arrangements.
- Supports manual switching of the designated incoming circuit.
- Provides an isolation function when installed and operated within its approved ratings and configuration.
- Manufacturer-listed alternative to the EPX-2503SD three-pole switch disconnector.
- Associated with the EPX-2504CK four-pole XT4 incoming connection kit.
- ABB identifies a maximum XT4 cable capacity of 150 mm² in its Protecta Power incoming device selection information, subject to the specified terminal arrangement.
- Front extended terminals are identified by ABB as an available connection option for suitable lug arrangements.
- Intended for professional electrical panelboard integration.
- Requires suitable upstream or associated circuit protection according to the installation design.
- ABB manufacturer order code 1TVS151800S3361.
ABB Tmax XT4 Incoming Switching for Protecta Power Panelboards
The ABB Protecta Power system provides modular low-voltage distribution panelboards for commercial and industrial installations. Its incoming device range includes non-automatic switch disconnectors, thermomagnetic MCCBs and electronic-trip MCCBs, allowing electrical designers to choose the switching and protection arrangement required for a particular installation.
The EPX-2504SD is listed by ABB under 400 A panelboard incoming devices – non-automatic switch disconnector. Although the compatible panelboard may have a 400 A busbar rating, the EPX-2504SD itself has a 250 A device rating. These values describe different parts of the distribution assembly and should not be treated as interchangeable.
The product uses the ABB Tmax XT4 platform and has a four-pole configuration. Four-pole devices may be specified where the approved electrical design requires switching of the neutral conductor alongside the three phase conductors. The suitability of four-pole switching, including neutral switching requirements and the applicable earthing arrangement, must be determined by the electrical designer.
A switch disconnector differs from an MCCB in its intended function. The EPX-2504SD provides a non-automatic switching and isolation arrangement but should not be relied upon to detect and interrupt overloads or short circuits in the manner of a suitably rated protective circuit breaker. Appropriate protection must be provided elsewhere in the electrical system.
For connecting the device to the Protecta Power busbar system, ABB lists the EPX-2504CK as the corresponding 250 A four-pole XT4 incoming connection kit. The connection kit is a separate product selection and should not be assumed to be included with the EPX-2504SD unless expressly confirmed in the relevant supply documentation.
ABB's incoming device selection information identifies a maximum cable capacity of 150 mm² for XT4. This is a manufacturer-stated platform reference rather than a guarantee that every conductor type or termination arrangement will accept that size. The permissible cable cross-section depends on conductor construction, terminal selection, installation conditions and the applicable device instructions.
For installations using cable lugs, ABB identifies front extended terminals as an available option within its incoming device range. Any additional terminals, supports, shrouds or connection accessories must be selected to match the complete panelboard configuration and the specified conductor arrangement.
ABB also offers the EPX-2503SD as the three-pole XT4 switch-disconnector option and the EPX-4004SD as a four-pole XT5 switch disconnector rated at 400 A. These alternatives allow electrical designers to select the appropriate pole arrangement and current rating without assuming that devices of different sizes are directly interchangeable.
The EPX-2504SD is an incoming switching device, not a complete Protecta Power panelboard. The enclosure, incoming connection kit, outgoing protective devices and any required metering or cable-management accessories form part of the wider assembly specification. Final equipment selection must consider load current, prospective fault current, isolation requirements, protective coordination and the applicable installation standards.
Typical Applications
- Compatible ABB Protecta Power 400 A panelboard incoming arrangements.
- 250 A four-pole incoming switching applications.
- Commercial building low-voltage electrical distribution.
- Industrial distribution panelboard construction.
- Main and sub-distribution boards requiring suitable incoming isolation.
- Electrical plant rooms and switchgear installations.
- Office buildings and mixed-use developments.
- Retail and commercial property electrical infrastructure.
- Warehouses and logistics facilities.
- Manufacturing premises and industrial facilities.
- Professional switchgear manufacturing and panel building.
- Compatible Protecta Power incoming device replacement projects.
