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Overload Relays
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Overload Relays
Overload relays are electrical devices designed to offer reliable protection for motors in the event of overload or phase failure.
These types of relays are used to protect against a running overcurrent that would cause overheating in a motor. Instead of instantaneous trip characteristics found in circuit breakers, fuses and overcurrent relays, overload relays monitor current over time.
Thermal overload relays have a bimetallic strip that bends when heated to a set temperature. When excessive current heats the relay to that setpoint, the contactor de-energizes and interrupts power to the motor.
Electronic overload relays use electronics to constantly monitor current, instead of relying on heat to trip a contact coil. These relays often offer adjustable current ranges, protect against phase loss, and can automatically reset.
Overload relays are marked by Class (Class 10, 20 and 30), which indicates the response time of the relay.
These types of relays are used to protect against a running overcurrent that would cause overheating in a motor. Instead of instantaneous trip characteristics found in circuit breakers, fuses and overcurrent relays, overload relays monitor current over time.
Thermal overload relays have a bimetallic strip that bends when heated to a set temperature. When excessive current heats the relay to that setpoint, the contactor de-energizes and interrupts power to the motor.
Electronic overload relays use electronics to constantly monitor current, instead of relying on heat to trip a contact coil. These relays often offer adjustable current ranges, protect against phase loss, and can automatically reset.
Overload relays are marked by Class (Class 10, 20 and 30), which indicates the response time of the relay.
- Bimetallic Amb. Compensated
- Convertible Manual/Auto Reset
- Setting Ranges Up To 310 Amps
- Tripping Class 10A
- UL; CSA Approvals
- Trip Indication
- Optional Remote Trip/Reset
- Single Phase and Unbalance Protection
- Variety of Accessories Available
- Continuous Temperature Compensation
- 50/60 Rated D.C. Frequency
- 690V Rated Insulation
- Class J Fuse Type
- Trip Class 10
- 3 Poles
- Overload protection- trip class 10.
- Phase loss sensitivity.
- Adjustable current setting for overload protection.
- Trip-free mechanism.
- Direct mounting onto mini contactors or block contactors.
- Suitable for three- and single- phase application
- Automatic or manual reset selectable.
- Overload protection – trip class 10
- Phase loss sensitivity
- Temperature compensation from -20 to 60 °C (-14 to 140°F)
- Adjustable current setting for overload protection
- Automatic or manual reset selectable
- Suitable for three- and single-phase application
- Trip-free mechanism
- Status indication
- STOP and TEST function
- Direct mounting onto block contactors
- Sealable operating elements
- Overload protection – trip class 10E, 20E, 30E selectable
- Adjustable current setting for overload protection
- Temperature compensation from -25 … +70 °C
- Automatic or manual reset selectable
- Phase loss sensitivity
- Overload protection – trip class 10E, 20E, 30E selectable
- Adjustable current setting for overload protection
- Temperature compensation from -25 … +70 °C
- Automatic or manual reset selectable
- Phase loss sensitivity
- Overload protection – trip class 10
- Phase loss sensitivity
- Temperature compensation from -20 to 60 °C (-14 to 140°F)
- Adjustable current setting for overload protection
- Automatic or manual reset selectable
- Suitable for three- and single-phase application
- Trip-free mechanism
- Status indication
- STOP and TEST function
- Direct mounting onto block contactors
- Sealable operating elements
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