Why Choose the ABB EPX-6303SD 630A 3-Pole XT5 Switch Disconnector?
The ABB EPX-6303SD, manufacturer order code 1TVS151800S3372, is a 630 A, three-pole switch disconnector based on the ABB Tmax XT5 platform. Designed for compatible ABB Protecta Power low-voltage distribution panelboards, this incoming switching device provides a dedicated means of manually switching and isolating the electrical supply.
As part of ABB's Protecta Power Enclosures range, the EPX-6303SD is specified for 630 A incoming distribution applications where a non-automatic switch disconnector is required rather than a moulded case circuit breaker with an overcurrent trip unit. Its three-pole configuration is suitable for appropriately designed three-phase electrical systems.
The EPX-6303SD is listed within ABB's 800 A Protecta Power panelboard incoming device range. It provides a manufacturer-designated XT5 switching solution for panel builders, electrical contractors and facilities requiring controlled incoming supply isolation within a compatible distribution assembly.
Key Advantages
- 630 A rated current for substantial low-voltage incoming distribution applications.
- Three-pole (3P) configuration for compatible three-phase electrical systems.
- ABB Tmax XT5 platform for integration into professional electrical distribution assemblies.
- Non-automatic switch disconnector for incoming supply switching and isolation.
- Purpose-designed for compatible ABB Protecta Power panelboards.
- Provides a dedicated switching solution where automatic overcurrent protection is provided separately.
- Supports planned electrical shutdown and isolation procedures.
- Part of ABB's coordinated range of incoming switching and protective devices.
- Suitable for commercial and industrial low-voltage electrical distribution installations.
- Supports standardised switchboard construction using manufacturer-designated components.
Key Features
- ABB Protecta Power incoming switch disconnector.
- EPX-6303SD model designation.
- Manufacturer order code 1TVS151800S3372.
- 630 A rated current.
- Three-pole (3P) switching configuration.
- ABB Tmax XT5 device platform.
- Non-automatic switching operation.
- Designed for incoming supply switching and isolation.
- Listed for compatible 800 A Protecta Power panelboard arrangements.
- Distinct from electronic and thermal-magnetic MCCBs.
- Manufacturer-listed XT5 maximum cable capacity of 185 mm², subject to the applicable terminal arrangement.
- Compatible with the wider Protecta Power incoming device and connection accessory system, subject to configuration.
- Suitable for professional switchboard construction and electrical installation.
630A Non-Automatic Switching and Isolation with ABB Tmax XT5
The ABB EPX-6303SD is a non-automatic switch disconnector designed to provide controlled switching and isolation of an incoming electrical supply. Unlike an MCCB equipped with thermal-magnetic or electronic protection, a switch disconnector does not automatically trip in response to overloads or short circuits.
This distinction is important when selecting incoming equipment for a distribution board. The EPX-6303SD provides the switching and isolation function, while the electrical installation must incorporate suitable upstream or otherwise coordinated protective equipment to provide the required overcurrent and short-circuit protection.
The 630 A rating identifies the specified current capacity of the incoming switching device. It does not establish the permissible load of the entire installation independently of the associated busbars, conductors, terminals, enclosure configuration and protective devices.
The three-pole configuration provides switching of three conductors in a suitable three-phase system. Where neutral switching is required, the corresponding four-pole configuration should be considered. The correct arrangement must be determined from the electrical system design and applicable installation requirements.
Integration with ABB Protecta Power 800A Panelboards
ABB identifies the EPX-6303SD within its Protecta Power selection range for 800 A busbar panelboards. The panelboard range includes configurations with 8, 12 and 18 outgoing ways, allowing designers to select an enclosure and distribution arrangement according to the required number of circuits.
The incoming non-automatic switch disconnector options include:
- EPX-6303SD: 630 A, three-pole XT5 switch disconnector.
- EPX-6304SD: 630 A, four-pole XT5 switch disconnector.
- EPX-8003SD: 800 A, three-pole XT6 switch disconnector.
- EPX-8004SD: 800 A, four-pole XT6 switch disconnector.
These options provide different current ratings and pole arrangements within the same Protecta Power incoming device selection system. The correct device should be selected according to the incoming supply rating, conductor arrangement and electrical installation requirements.
ABB also provides dedicated incoming connection kits for XT5 and XT6 devices. These arrangements incorporate components such as incomer support brackets, shrouding and busbar connections. The appropriate connection kit must be confirmed for the selected switch disconnector and panelboard configuration.
ABB's Protecta Power guidance lists a maximum XT5 cable capacity of 185 mm². Actual conductor compatibility depends on the installed terminals, conductor construction and installation conditions. Front extended terminals are also identified as an available connection option for suitable cable lug arrangements.
Before installation, the complete assembly should be checked for rated operational voltage, short-circuit withstand requirements, upstream protection coordination, isolation requirements and compatibility with the designated Protecta Power enclosure.
Typical Applications
- ABB Protecta Power 630 A incoming supply switching.
- Compatible 800 A busbar distribution panelboards.
- Commercial building main and sub-main distribution systems.
- Industrial low-voltage switchboards.
- Three-phase incoming supply isolation arrangements.
- Electrical plant rooms and power distribution infrastructure.
- Building services electrical distribution installations.
- Panelboards with separately coordinated upstream overcurrent protection.
- Professional switchboard manufacturing and assembly.
- Compatible Protecta Power panelboard refurbishment and equipment replacement projects.
