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ABBFuse protector
Product Model

OS250BS30

Manufacturer

ABB

Category

Fuse protector

Product ID

74791

In Stock
Last updated: 2025/4/19
View Specifications
ABB OS250BS30

Selling Points

  • 1High Current Rating: Handles up to 250 A in fully enclosed conditions.
  • 2British Standard Compliance: Meets B1-B3 fuse size standards.
  • 3Reliable Operation: Self-cleaning contacts ensure long, reliable electrical life.
  • 4Modular Design: Easy installation and maintenance with adjustable shaft and snap-on auxiliary contacts.
  • 5Safety Features: Interlocking fuse covers prevent opening while the switch is in the "ON" position, reducing electric shock risk.
Product Details
OS250BS30
ABB

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

ParameterValueParameterValue
Pollution Degree
3
Product Net Width
240 mm
Product Net Height
199 mm
Product Net Depth / Length
154 mm
Product Net Weight
3.8 kg 8.4 lb
Conventional Free-air Thermal Current (Ith)
Θ = 40 °C 250 A
Conventional Thermal Current (Ithe)
Fully Enclosed 250 A
Fuse Size
B1-B3
Fuse System
British Standard
Handle Type
Handle and shaft not included
Mounting Type
Base mounting
Number of Poles
3
Operating Mode
Side Operated
Pollution Degree
3
Position of Line Terminals
Top In - Bottom Out, Bottom In - Top Out
Power Loss
at Rated Operating Conditions per Pole 13 W
Rated Conditional Short-Circuit Current (Inc)
(690 V) 80 kA
Rated Current (In)
Main Circuit 250 A
Rated Impulse Withstand Voltage (Uimp)
12 kV
Rated Insulation Voltage (Ui)
1000 V
Rated Operational Current AC-21A (Ie)
(500 V) 250 A (690 V) 250 A
Rated Operational Current AC-22A (Ie)
(380 ... 415 V) 250 A (500 V) 250 A (690 V) 250 A
Rated Operational Current AC-23A (Ie)
(380 ... 415 V) 250 A (500 V) 250 A (690 V) 250 A
Rated Operational Power AC-23A (Pe)
(220 ... 240 V) 75 kW (400 V) 140 kW (415 V) 145 kW (500 V) 170 kW (690 V) 250 kW
Rated Operational Voltage
Main Circuit 690 V AC
Rated Short-time Withstand Current Low Voltage (Icw)
for 1 s 8 kiloampere rms
Standards
IEC 60947-3
Switches Operating Mechanism
30 (Right Side)
Terminal Type
Lug terminals
Terminal Width
25 mm
Tightening Torque
30 ... 44 N·m
Tightening Torque
30 ... 44 N·m
Object Classification Code
Q
ETIM 8
EC001040 - Fuse switch disconnector
ETIM 9
EC001040 - Fuse switch disconnector
UNSPSC
39122233
IDEA Granular Category Code (IGCC)
5291 >> Fuse switch disconnector
eClass
V11.1 : 27371401
WEEE Category
5. Small Equipment (No External Dimension More Than 50 cm)
Manufacturer ID
1SCA022870R8580

Specifications may be subject to change without notice