OS63GB04N1P ABB 63A 4-Pole BS88 Fuse Switch Disconnector Left-Hand Mechanism

Why Choose the ABB OS63GB04N1P 63A 4-Pole Fuse Switch Disconnector?

The ABB OS63GB04N1P (manufacturer order number 1SCA115238R1001) is a robust 63 A four-pole fuse switch disconnector designed for reliable switching, isolation and fuse-based protection in industrial and commercial low-voltage electrical installations. As part of the ABB OS fuse switch disconnector series, it combines manual load switching with British Standard fuse compatibility, making it suitable for electrical distribution boards, industrial machinery and control panel applications.

This fuse switch features a front-operated switching mechanism positioned at the left-hand end of the assembly, providing a practical arrangement for installation inside electrical cabinets and switchgear. Its four-pole configuration incorporates three fused poles and a non-fused switched neutral with a solid link, enabling coordinated switching of three-phase circuits with a neutral conductor. The unit accepts compatible BS88 A2 and A3 fuse links for overcurrent and short-circuit protection.

With a 63 A rated current, a four-pole switching arrangement and a front-operated, base-mounted design, the ABB OS63GB04N1P provides dependable electrical isolation for industrial distribution systems. The assembly includes an external operating handle and 161 mm shaft, simplifying integration into suitable control panel doors and enclosures. Its protected terminals and modular construction support straightforward installation and maintenance.

Key Advantages

• Reliable 63 A fuse switch disconnector for industrial electrical distribution.
• Four-pole configuration provides three fused phases and a switched neutral.
• Left-hand end-mounted operating mechanism supports convenient front operation.
• Compatible with British Standard BS88 A2 and A3 fuse links.
• Non-fused switched neutral with solid link provides coordinated neutral switching.
• Combines load switching, circuit isolation and fuse-based protection in one assembly.
• External operating handle and 161 mm shaft included for enclosure integration.
• IP65-rated external handle provides protection against dust and water jets when correctly installed.
• IP20 protected tunnel terminals improve protection against accidental contact.
• Base-mounted construction supports installation inside industrial switchgear and distribution cabinets.
• Padlockable OFF position supports controlled electrical isolation during maintenance.
• Designed in accordance with IEC/EN 60947-3 for low-voltage switching equipment.

Key Features

• ABB OS fuse switch disconnector series.
• Manufacturer model: OS63GB04N1P.
• ABB manufacturer order number: 1SCA115238R1001.
• Rated current: 63 A.
• Number of poles: 4.
• Pole arrangement: Three fused poles and one non-fused switched neutral.
• Neutral configuration: N1, switched neutral with solid link on the left-hand side.
• Fuse standard: British Standard BS88.
• Compatible fuse sizes: A2 and A3.
• Operating mechanism: Positioned at the left-hand end of the switch.
• Operating method: Front operated.
• Mounting arrangement: Base mounting.
• External operating handle: Included.
• Operating shaft length: 161 mm.
• Handle protection rating: IP65.
• Terminal protection rating: IP20.
• Rated operational voltage: Up to 690 V AC, subject to utilisation category and application.
• AC-23A motor power rating at 400 V: 30 kW.
• Applicable standard: IEC/EN 60947-3.
• Suitable for industrial switchboards, distribution equipment and machinery isolation.

Technical Specifications

• Manufacturer: ABB
• Series: OS Fuse Switch Disconnectors
• Model: OS63GB04N1P
• Manufacturer order number: 1SCA115238R1001
• ABB product group: 311021 – OS Fuse Switches
• Product type: Fuse switch disconnector
• Product description: 63 A 4-pole switch fuse with operating mechanism at the end
• Rated current: 63 A
• Number of poles: 4
• Fused poles: 3
• Neutral pole: Non-fused switched neutral with solid link
• Neutral configuration: N1 – left-hand switched neutral
• Fuse standard: BS88
• Compatible fuse sizes: A2 / A3
• Operating mechanism position: Left-hand end of switch
• Operating arrangement: Front operated
• Mounting type: Base mounting
• Terminal connection: Screw terminals
• Terminal design: Protected tunnel terminals
• Terminal protection rating: IP20
• Rated operational voltage: Up to 690 V AC, depending on utilisation category
• AC-23A motor power at 400 V: 30 kW
• Compatible fuse-link standard: BS88-2
• External operating handle: Included
• Handle type: Pistol grip
• Handle colour: Black
• Operating shaft: Included
• Operating shaft length: 161 mm
• Operating shaft diameter: 6 mm
• Handle protection rating: IP65
• Handle locking: Padlockable in OFF position
• Door interlocking: Interlock function in ON position
• Flexible conductor capacity with ferrule: 2.5–25 mm²
• Dimensions (H × W × D): approx. 125 × 136 × 109 mm
• Net weight: approx. 1.37 kg
• Applicable standard: IEC/EN 60947-3
• Country of origin: Finland
• EAN: 6417019476636

Reliable Electrical Isolation and Fuse Protection for Industrial Systems

Fuse switch disconnectors such as the ABB OS63GB04N1P combine manual switching and electrical isolation with the protective characteristics of installed fuse links. The switching mechanism allows the circuit to be disconnected through a single operating action, while correctly selected BS88 fuse links provide overcurrent and short-circuit protection for the connected electrical installation.

The four-pole configuration is particularly suitable for three-phase distribution systems requiring neutral switching. Three poles accommodate the protective fuse links, while the fourth pole provides a non-fused switched neutral with a solid link. This arrangement allows the neutral conductor to be switched as part of the complete assembly without installing a fuse in the neutral circuit.

The OS63GB04N1P features a mechanism positioned at the left-hand end of the switch, distinguishing it from versions with the operating mechanism between the poles. This arrangement provides flexibility when designing electrical distribution boards and industrial control cabinets where the available mounting space and operating shaft position must be considered.

The included external operating handle and shaft allow the switch to be operated from outside a suitable electrical enclosure. The IP65-rated handle supports installation in demanding industrial environments, while the padlockable OFF position helps maintenance personnel establish controlled isolation procedures. The door interlocking arrangement also supports safer access to enclosed electrical equipment when correctly installed.

Designed for integration into industrial low-voltage switchgear, the ABB OS63GB04N1P provides a practical solution for machinery supplies, feeder circuits and electrical distribution installations. Fuse selection, cable sizing, fault protection coordination and installation arrangements should be determined according to the electrical system requirements and applicable standards.

Typical Applications

• Industrial three-phase electrical distribution systems.
• Low-voltage switchboards and distribution cabinets.
• Three-phase and neutral circuit isolation.
• Motor control centres and industrial motor feeders.
• Manufacturing machinery and production equipment.
• Industrial control panels and automation systems.
• Pumps, fans, compressors and mechanical plant.
• Commercial and industrial electrical distribution boards.
• Machinery maintenance isolation and local disconnecting arrangements.
• Electrical installations requiring BS88 A2 or A3 fuse protection.
• OEM switchgear manufacturing and industrial panel building.
• Industrial feeder protection and equipment supply isolation.