Product Overview

The ABB OS250D03P is a high-performance 3-pole fuse switch disconnector from ABB’s OS series, designed to provide reliable circuit protection and isolation in low-voltage industrial applications. This switch fuse is rated for 250A continuous current and 690V AC, making it an ideal solution for demanding environments where safety and operational reliability are paramount . The ABB OS250D03P is engineered as a front-operated, base-mounted unit that incorporates a pistol-type handle mechanism, ensuring convenient and safe manual operation.

The ABB OS250D03P accommodates DIN-type NH0 and NH1 fuse sizes, providing flexible overcurrent and short-circuit protection for various load types . With a rated short-circuit withstand capacity of 80kA and a rated impulse withstand voltage of 12kV, the ABB OS250D03P delivers robust protection against electrical faults . The device features a visible break indicator and can be padlocked in the OFF position, ensuring safe isolation during maintenance activities.

Designed for a wide temperature range and harsh industrial conditions, the ABB OS250D03P is built to ABB’s exacting quality standards. The ABB OS250D03P comes with lug-type terminals for secure wiring connections and includes a door interlock mechanism that prevents the cabinet door from being opened while the switch is in the ON position . Available with a factory-installed 161mm shaft and handle (as indicated by the “P” suffix), the ABB OS250D03P is a complete, ready-to-install solution for panel builders and maintenance engineers.

 

Technical Specifications

Parameter Name	Parameter Value
Product Model	OS250D03P
Manufacturer	ABB
Order Number	1SCA022719R0090 / 10040368
Product Type	Fuse Switch Disconnector / Switch Fuse
Series	OS
Number of Poles	3 Pole
Rated Current (AC)	250A
Rated Operating Voltage	690V AC
Fuse Size Compatibility	NH0, NH1
Switching Power	250 kW
Rated Short Circuit Current	80 kA
Rated Short Time Withstand Current	8 kA
Rated Impulse Withstand Voltage	12 kV
Rated Insulation Voltage	1000V
Power Loss	23W
Operating Mechanism	Front Operated
Handle Type	Pistol Type with 161mm Shaft
Terminal Type	Lug Terminal
Mounting Type	Base Mounting
Protection Rating	Handle IP65
Dimensions (W x H x D)	208mm x 193mm x 154mm
Weight	Approx. 4.3 kg
Standards	IEC 60947-3, UL, CCC, DNV GL
Degree of Pollution	IP3X
Terminal Width	25mm
Country of Origin	Finland

 

 

Main Features and Advantages

Superior Protection and Safety: The ABB OS250D03P is designed with a visible break window that provides a clear indication of the switch position, ensuring safe isolation during maintenance. The integrated door interlock prevents accidental access to live parts while the switch is in the ON position, and the padlockable handle allows the switch to be locked in the OFF position, providing an additional layer of safety during service activities . With a rated impulse withstand voltage of 12kV, the ABB OS250D03P offers robust protection against voltage surges and transients common in industrial environments.

High Short Circuit Withstand Capability: The ABB OS250D03P is capable of withstanding short-circuit currents up to 80kA, providing reliable protection for downstream equipment. This high short-circuit rating, combined with an 8kA short-time withstand current, ensures that the ABB OS250D03P can safely handle fault conditions without compromising its structural integrity . This makes the ABB OS250D03P suitable for use in high-power industrial circuits.

Flexible Fuse Compatibility: The ABB OS250D03P accepts both NH0 and NH1 fuse sizes, offering flexibility in selecting the appropriate fuse rating for specific application requirements. This compatibility allows the ABB OS250D03P to be adapted to various load types and fault protection needs without requiring multiple switch variants . The fuse holders are designed for easy fuse replacement, reducing downtime during maintenance.

Robust Construction and High Power Handling: With a rated switching power of 250kW, the ABB OS250D03P can handle substantial loads, making it ideal for motor control and power distribution applications . The base-mounted design and lug-type terminals ensure secure, reliable connections that can withstand vibration and thermal cycling. The device’s power loss of only 23W contributes to overall system efficiency, reducing energy waste and heat generation in the switchgear enclosure.

Flexible Configuration Options: The ABB OS250D03P is part of the OS series that offers multiple configuration variants, including front-operated, side-operated, and various handle options. The “P” suffix on the ABB OS250D03P indicates the inclusion of a 161mm shaft and external handle OHB6506, providing a complete, ready-to-install solution . The ABB OS250D03P also supports a wide range of accessories, including shrouds, auxiliary contacts, and extension shafts, allowing customization for specific installation requirements.