OVERLOAD RELAY COMPARISON
Information is subject to change without notice.
Overload Relay Type Trip Indication Reset Mechanism Solid State Overload
Allen Bradley
Bulletin 592/593
Series
Melting Alloy
Bulletin 592
Yes, an optical indicator
which turns yellow. Manual Only • Self Powered SMP1, SMP2 only
• External Power SMP3
• Phase Loss SMP1, SMP2, SMP3
• Grd. Fault and Jam Prot. SMP2, SMP3 only
• Selectable Trip Classes SMP2, SMP3 only 10, 15,
20, 30
• Com. Capabilities SMP3 only
• Led Indication SMP3 only
Bimetallic
Bulletin 593
Yes, an optical indicator
which turns yellow. Automatic
Solid State
Bulletin 592
SMP1, SMP2, SMP3
Yes, yellow trip flag
appears in window.
SMP1 Manual only or
selectable (Man/Auto)
SMP2, SMP3
selectable (Man/Auto)
Cutler Hammer
Freedom Series
Melting Alloy Yes, orange trip flag
appears in window. Selectable (Man/Auto)
N/A
Bimetallic Yes, orange trip flag
appears in window. Selectable (Man/Auto)
Furnas Innova
Plus/ESP 100
Melting Alloy No Manual (must push to
reset)
• Self Powered ESP 100
• Phase Loss
• Separate Trip Classes 10, 20, 30
Bimetallic No Manual (must push to
reset)
Solid State Yes, reset button moves
(not noticeable).
Manual (must push to
reset)
General Electric
Line 300 Series
Melting Alloy Yes, yellow trip flag
appears in window.
Manual only, optional
Reset Module • Self Powered
• Phase Loss
• Phase Unbalance (adjustable)
• Selectable Trip Classes 10, 20, 30
Bimetallic Yes, yellow trip flag
appears in window.
Manual only, optional
Reset Module
Solid State Yes, yellow trip flag
appears in window.
Manual only, optional
Reset Module
Westinghouse
Advantage
Solid State No, optional light
accessory.
Convertible (Man/Auto)
through dip switches.
Remote Reset module
available
• 120 V control power
• Phase Loss
• Phase Unbalance
• Dip Switch settting 10, 20, 30 or none
• Grd. Fault Protection
Square D Type S
Melting Alloy Yes, yellow trip flag Manual Only
• Self Powered
• Base and Feature Base
• Phase Loss
• Phase Unbalance
• Grd. Fault Detection Feature Base only
• Selectable Trip Classes Feature Base, 10 or 20
• Com. Capabilities Feature Base only
• 4-20 Comm. Module Feature Base only
• Harmonic Immune
• Power LED Indication
• Ambient Insensitive
Bimetallic Yes, yellow trip flag
appears in window. Selectable or Manual
Solid State Yes, yellow trip flag
appears in window
Manual Only, Remote
Reset module available
