MA-250B 1200A (Front View) 
MA-250B 1200A (Rear View)
Part/Catalog Number: MA-250B 1200A
Original Manufacturer: Allis Chalmers
Product Line: MA – Ruptair
Amps: 1200A Frame
Operation: Stored Energy SE-4 Mechanism
Mounting: Horizontal Drawout
Voltage: 5kV
Interrupting Capacity: 250mVA
Description: The Ruptair MA-250B medium voltage air circuit breaker was originally manufactured by Allis Chalmers. The MA-250B featured is a 1200A Frame, Stored-Energy Operated (SE-4 Operating Mechanism), Horizontal Draw-out style, Medium Voltage Air Circuit Breaker. Other models of the MA-250B exist, such as the 2000A variant.
MA-250B 1200A Parts & Resources:
– Charging Motor
– Trip Coils
– Close Coils
– Relays
– Arc Chutes
– Contact Assemblies
– Operating Mechanism Parts
– Auxiliary Switches
– Control Devices
– Undervoltage Trip Device
– Primary Disconnect & Finger Clusters
– Secondary Disconnects
– Maintenance Tools
– Switchgear Parts
– Draw-out Parts
– Renewal Parts Guide
– Maintenance Manuals