Benshaw Starter Overload Relays

Benshaw offers a complete suite of products for motor control and protection. At the core of their motor protection solutions are overload relays designed to prevent damage to three-phase and single-phase motors caused by excessive electrical current. These relays (more correctly referred to as starters with overload protection) serve two functions: They trip the motor circuit when dangerous overcurrents occur and when they don't stop tripping during a nuisance fault, and they also prevent phase loss and overheating of the motor.

Adjustable overload relays from Benshaw allow for fine-tuning the relay to the motor's protection requirements. Both thermal and electronic versions are available, providing application-based flexibility. The relays are straightforward to install and integrate with perfectly with control devices. Convenience and safety are taken care of in both manual and automatic reset options.

Products

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Benshaw SPO-800H-660A Bimetallic Overload Relay - 690 V, 520–800 Amp, Class 20
Benshaw SPO-800H-660A Bimetallic Overload Relay - 690 V, 520–800 Amp, Class 20
$825.55 $1310.40
Benshaw SPO-800H-660A - RMSO/SPO Series Overload Relays are bimetallic-style relays designed to protect AC-3 circuits (up to 150A @ 690V) and motors against overloads, phase failure, long starting times and stalling of the motor. RMSO and SPO Series overload relays can be integrally mounted to Benshaw RC and RSC contactors for thermal overload protectio
Benshaw SPO-800H-500A Bimetallic Overload Relay - 690 V, 400–600 Amp, Class 20
Benshaw SPO-800H-500A Bimetallic Overload Relay - 690 V, 400–600 Amp, Class 20
$825.55 $1310.40
Benshaw SPO-800H-500A - RMSO/SPO Series Overload Relays are bimetallic-style relays designed to protect AC-3 circuits (up to 150A @ 690V) and motors against overloads, phase failure, long starting times and stalling of the motor. RMSO and SPO Series overload relays can be integrally mounted to Benshaw RC and RSC contactors for thermal overload protectio
Benshaw SPO-800H-350A Bimetallic Overload Relay - 690 V, 260–400 Amp, Class 20
Benshaw SPO-800H-350A Bimetallic Overload Relay - 690 V, 260–400 Amp, Class 20
$825.55 $1310.40
Benshaw SPO-800H-350A - RMSO/SPO Series Overload Relays are bimetallic-style relays designed to protect AC-3 circuits (up to 150A @ 690V) and motors against overloads, phase failure, long starting times and stalling of the motor. RMSO and SPO Series overload relays can be integrally mounted to Benshaw RC and RSC contactors for thermal overload protectio
Benshaw SPO-800H-250A Bimetallic Overload Relay - 690 V, 200–300 Amp, Class 20
Benshaw SPO-800H-250A Bimetallic Overload Relay - 690 V, 200–300 Amp, Class 20
$825.55 $1310.40
Benshaw SPO-800H-250A - RMSO/SPO Series Overload Relays are bimetallic-style relays designed to protect AC-3 circuits (up to 150A @ 690V) and motors against overloads, phase failure, long starting times and stalling of the motor. RMSO and SPO Series overload relays can be integrally mounted to Benshaw RC and RSC contactors for thermal overload protectio
Benshaw SPO-400H-350A Bimetallic Overload Relay - 690 V, 260–400 Amp, Class 20
Benshaw SPO-400H-350A Bimetallic Overload Relay - 690 V, 260–400 Amp, Class 20
$276.70 $439.20
Benshaw SPO-400H-350A - RMSO/SPO Series Overload Relays are bimetallic-style relays designed to protect AC-3 circuits (up to 150A @ 690V) and motors against overloads, phase failure, long starting times and stalling of the motor. RMSO and SPO Series overload relays can be integrally mounted to Benshaw RC and RSC contactors for thermal overload protectio
Benshaw SPO-400H-250A Bimetallic Overload Relay - 690 V, 200–300 Amp, Class 20
Benshaw SPO-400H-250A Bimetallic Overload Relay - 690 V, 200–300 Amp, Class 20
$276.70 $439.20
Benshaw SPO-400H-250A - RMSO/SPO Series Overload Relays are bimetallic-style relays designed to protect AC-3 circuits (up to 150A @ 690V) and motors against overloads, phase failure, long starting times and stalling of the motor. RMSO and SPO Series overload relays can be integrally mounted to Benshaw RC and RSC contactors for thermal overload protectio
Benshaw SPO-400H-200A Bimetallic Overload Relay - 690 V, 160–240 Amp, Class 20
Benshaw SPO-400H-200A Bimetallic Overload Relay - 690 V, 160–240 Amp, Class 20
$276.70 $439.20
Benshaw SPO-400H-200A - RMSO/SPO Series Overload Relays are bimetallic-style relays designed to protect AC-3 circuits (up to 150A @ 690V) and motors against overloads, phase failure, long starting times and stalling of the motor. RMSO and SPO Series overload relays can be integrally mounted to Benshaw RC and RSC contactors for thermal overload protectio
Benshaw SPO-400H-130A Bimetallic Overload Relay - 690 V, 100–160 Amp, Class 20
Benshaw SPO-400H-130A Bimetallic Overload Relay - 690 V, 100–160 Amp, Class 20
$276.70 $439.20
Benshaw SPO-400H-130A - RMSO/SPO Series Overload Relays are bimetallic-style relays designed to protect AC-3 circuits (up to 150A @ 690V) and motors against overloads, phase failure, long starting times and stalling of the motor. RMSO and SPO Series overload relays can be integrally mounted to Benshaw RC and RSC contactors for thermal overload protectio
Benshaw SPO-220H-200A Bimetallic Overload Relay - 690 V, 160–240 Amp, Class 20
Benshaw SPO-220H-200A Bimetallic Overload Relay - 690 V, 160–240 Amp, Class 20
$235.87 $374.40
Benshaw SPO-220H-200A - RMSO/SPO Series Overload Relays are bimetallic-style relays designed to protect AC-3 circuits (up to 150A @ 690V) and motors against overloads, phase failure, long starting times and stalling of the motor. RMSO and SPO Series overload relays can be integrally mounted to Benshaw RC and RSC contactors for thermal overload protectio
Benshaw SPO-220H-130A Bimetallic Overload Relay - 690 V, 100–160 Amp, Class 20
Benshaw SPO-220H-130A Bimetallic Overload Relay - 690 V, 100–160 Amp, Class 20
$235.87 $374.40
Benshaw SPO-220H-130A - RMSO/SPO Series Overload Relays are bimetallic-style relays designed to protect AC-3 circuits (up to 150A @ 690V) and motors against overloads, phase failure, long starting times and stalling of the motor. RMSO and SPO Series overload relays can be integrally mounted to Benshaw RC and RSC contactors for thermal overload protectio
Benshaw SPO-220H-80A Bimetallic Overload Relay - 690 V, 65–100 Amp, Class 20
Benshaw SPO-220H-80A Bimetallic Overload Relay - 690 V, 65–100 Amp, Class 20
$235.87 $374.40
Benshaw SPO-220H-80A - RMSO/SPO Series Overload Relays are bimetallic-style relays designed to protect AC-3 circuits (up to 150A @ 690V) and motors against overloads, phase failure, long starting times and stalling of the motor. RMSO and SPO Series overload relays can be integrally mounted to Benshaw RC and RSC contactors for thermal overload protectio
Benshaw RMSO-150H-130A Bimetallic Overload Relay - 690 V, 110–150 Amp, Class 20
Benshaw RMSO-150H-130A Bimetallic Overload Relay - 690 V, 110–150 Amp, Class 20
$152.71 $242.40
Benshaw RMSO-150H-130A - RMSO/SPO Series Overload Relays are bimetallic-style relays designed to protect AC-3 circuits (up to 150A @ 690V) and motors against overloads, phase failure, long starting times and stalling of the motor. RMSO and SPO Series overload relays can be integrally mounted to Benshaw RC and RSC contactors for thermal overload protectio