1TVS151800S3616 ABB EPX-6304-E2-MCCB Protecta Power 630A 4-Pole XT5 Electronic LSI MCCB

Why Choose the ABB EPX-6304-E2-MCCB 630A 4-Pole Electronic LSI MCCB?

The ABB EPX-6304-E2-MCCB, manufacturer order code 1TVS151800S3616, is a 630 A, four-pole electronic moulded case circuit breaker (MCCB) from the ABB Tmax XT5 family. Designed for compatible ABB Protecta Power low-voltage distribution panelboards, this incoming protective device combines high-current switching capability with electronic overload and short-circuit protection.

Featuring electronic LSI protection, the EPX-6304-E2-MCCB provides three essential protection functions: long-time overload protection (L), short-time delayed short-circuit protection (S) and instantaneous short-circuit protection (I). These functions enable electrical engineers to configure protection characteristics according to the requirements of the installation and its downstream protective devices.

Its 630 A rated current and four-pole configuration make it suitable for appropriately designed three-phase electrical distribution systems requiring four-pole incoming protection. As part of ABB's Protecta Power Enclosures product group, the EPX-6304-E2-MCCB supports professional switchboard construction using coordinated incoming devices, connection accessories and distribution components.

Key Advantages

• 630 A rated current for substantial commercial and industrial electrical distribution applications.
• Four-pole (4P) configuration for compatible three-phase distribution systems.
• ABB Tmax XT5 platform developed for professional low-voltage circuit protection.
• Electronic LSI trip protection combining long-time, short-time and instantaneous overcurrent protection functions.
• Adjustable protection characteristics support electrical system coordination.
• Short-time protection functionality can assist selectivity between incoming and downstream protective devices.
• Instantaneous protection enables rapid interruption of qualifying short-circuit faults.
• Designed for integration into compatible ABB Protecta Power panelboards.
• Provides automatic overcurrent protection in addition to circuit switching.
• Suitable for professional switchboard construction, installation and commissioning.

Key Features

• ABB Protecta Power electronic incoming MCCB.
• EPX-6304-E2-MCCB model designation.
• Manufacturer order code 1TVS151800S3616.
• 630 A rated current.
• Four-pole (4P) circuit breaker configuration.
• ABB Tmax XT5 moulded case circuit breaker platform.
• Electronic trip technology with LSI protection functions.
• L function: Long-time overload protection.
• S function: Short-time delayed short-circuit protection.
• I function: Instantaneous short-circuit protection.
• All three L, S and I protection characteristics are available within the LSI arrangement.
• Designed for incoming circuit switching and overcurrent protection.
• Suitable for compatible ABB Protecta Power electrical distribution panelboards.
• Associated with the EPX-6304CK 630 A XT5 four-pole incoming connection kit.
• Supports coordinated low-voltage electrical distribution when correctly selected and configured.

Understanding Electronic LSI Protection on the ABB Tmax XT5

The ABB EPX-6304-E2-MCCB uses electronic LSI protection to provide configurable overcurrent protection for incoming distribution circuits. The LSI arrangement is particularly useful where electrical engineers need to coordinate the operation of an incoming MCCB with downstream protective devices.

The three LSI protection functions are:

• L – Long-time overload protection: Protects conductors and connected equipment against sustained overcurrent conditions. Its settings are selected according to the conductor capacity, expected load and protection requirements of the electrical installation.
• S – Short-time delayed short-circuit protection: Provides a short-circuit protection characteristic with a configurable delay. When correctly coordinated, this can allow an appropriate downstream protective device to clear certain faults before the incoming breaker operates.
• I – Instantaneous short-circuit protection: Provides rapid tripping when the configured instantaneous short-circuit threshold is reached, reducing the duration of qualifying high-current faults.

Unlike an LS/I electronic trip arrangement, in which the short-circuit protection characteristic is selected between S and I, the LSI arrangement incorporates all three L, S and I functions. This provides additional flexibility when establishing protection settings for a distribution system.

However, an LSI circuit breaker does not automatically guarantee full discrimination or selectivity. Coordination must be assessed using the prospective fault current, downstream device characteristics, ABB protection coordination information and the final settings applied during commissioning.

The exact electronic trip adjustment ranges depend on the fitted trip unit configuration. These values should be verified against the supplied circuit breaker's technical documentation rather than assumed from the XT5 frame size alone.

Integration with ABB Protecta Power Distribution Panelboards

The ABB Protecta Power system incorporates incoming protective devices, distribution panelboards, busbar assemblies and connection accessories for commercial and industrial low-voltage distribution.

The EPX-6304-E2-MCCB is specified as a 630 A, four-pole electronic LSI incoming MCCB for compatible Protecta Power configurations. Its XT5 frame provides a manufacturer-designated platform for integration into suitable incoming circuit breaker arrangements.

The associated EPX-6304CK is the 630 A XT5 four-pole incoming connection kit. ABB's Protecta Power incoming connection arrangements provide components for mechanically supporting and electrically connecting the incoming device to the designated panelboard assembly.

The incoming connection kit should be selected according to the specific panelboard and device configuration. The EPX-6304-E2-MCCB order code identifies the circuit breaker and should not be assumed to include separately listed connection accessories.

ABB's Protecta Power installation guidance identifies a maximum XT5 cable capacity of 185 mm². Actual conductor compatibility depends on the selected terminal arrangement, conductor construction, cable preparation and applicable installation requirements. Extended front terminals may be available for suitable cable lug connections.

The four-pole arrangement is intended for electrical installations requiring four-pole incoming switching and protection. The precise neutral-pole switching and protection characteristics must be confirmed from the supplied device documentation and the installation design.

Before final selection, electrical engineers should verify the required breaking capacity, rated operational voltage, prospective fault current, conductor sizing, protection settings and compatibility with the completed Protecta Power distribution assembly. These parameters are not established solely by the 630 A rating and XT5 frame designation.

ABB XT5 Electronic LSI vs LS/I Incoming MCCBs

The ABB Protecta Power range includes alternative XT5 incoming circuit breaker configurations for different protection requirements. The EPX-6304-E2-MCCB is specifically identified as the 630 A, four-pole electronic LSI version.

• EPX-6304MCCB: 630 A, four-pole XT5 thermal-magnetic MCCB.
• EPX-6304-E1-MCCB: 630 A, four-pole XT5 electronic MCCB with LS/I protection.
• EPX-6304-E2-MCCB: 630 A, four-pole XT5 electronic MCCB with LSI protection.
• EPX-6304SD: 630 A, four-pole XT5 non-automatic switch disconnector.

The E2 LSI configuration provides long-time, short-time and instantaneous protection characteristics together, making it appropriate for installations requiring these electronic protection functions.

The E1 LS/I configuration provides overload protection with selectable short-circuit characteristics, while the thermal-magnetic MCCB uses a different overcurrent trip technology. The switch disconnector provides switching and isolation without automatic overcurrent trip protection.

Selection should be based on the required protection functions, electrical system characteristics, prospective fault levels and compatibility with the complete distribution panelboard.

Typical Applications

• ABB Protecta Power 630 A incoming MCCB installations.
• Commercial building main and sub-main electrical distribution.
• Industrial low-voltage switchboards and panelboards.
• Three-phase electrical systems requiring four-pole incoming circuit protection.
• Electrical installations requiring adjustable LSI overcurrent protection.
• Distribution systems requiring coordinated incoming and outgoing protective devices.
• Electrical plant rooms and power distribution infrastructure.
• Building services electrical distribution systems.
• Professional electrical panel manufacturing and switchboard assembly.
• Compatible Protecta Power panelboard upgrades and refurbishment projects.