Electronic Overload Relays IEC

Overload relays protect the motor and its components from an overload situation, which can result in excessive heat and damage. The overload relay is wired in series with the motor, so that the electrical current that flows to the motor will flow through the overload relay as well. When the electrical current flowing in the monitored circuit exceeds a certain preset limit over a certain period of time, the overload relay will trip, causing an auxiliary contact to interrupt the motor control circuit. This de-energizes the contactor, removing power to the motor, avoiding overheating and damage. The overload relay will reset automatically after a certain period of time or can be reset manually after the cause of the overload has been rectified.

Electronic overload relays do not rely on a heater mechanism to detect an overload, but rather use temperature sensors or current transformers to sense the amount of current flowing to the motor. Temperature is sensed using positive temperature coefficient (PTC) thermistors and used to trip the circuit in overload situations.

Schneider Electric TeSys LR9D and LR9F electronic overload relays provide reliable motor protection and offer a wide current adjustment range. Their high level of accuracy is due to thermal modeling, suitable for the most demanding applications. They can be directly mounted to TeSys D and F contactors to form very compact motor starters.

Sort By:
$606.20
TeSys LRF - electronic thermal overload relay - 200...330 A - class 10/20
$543.20
TeSys LRF - electronic thermal overload relay - 60...100 A - class 10/20
$543.20
TeSys LRF - electronic thermal overload relay - 40...80 A - class 10/20
$814.80
TeSys LRF - electronic thermal overload relay - 30...50 A - class 10/20
$543.20
TeSys LRF - electronic thermal overload relay - 132...220 A - class 10/20
$3021.74
TeSys LRF - electronic thermal overload relay - 380...630 A - class 10/20
$417.20
TeSys LRF - electronic thermal overload relay - 48...80 A - class 20
$417.20
TeSys LRF - electronic thermal overload relay - 30...50 A - class 10
$543.20
TeSys LRF - electronic thermal overload relay - 90...150 A - class 10/20
$1267.00
TeSys LRF - electronic thermal overload relay - 380...630 A - class 10
$1267.00
TeSys LRF - electronic thermal overload relay - 380...630 A - class 20
$417.20
TeSys LRF - electronic thermal overload relay - 30...50 A - class 20
$417.20
TeSys LRF - electronic thermal overload relay - 48...80 A - class 10
$1031.80
TeSys LRF - electronic thermal overload relay - 300...500 A - class 10
$466.20
TeSys LRF - electronic thermal overload relay - 200...330 A - class 10
$417.20
TeSys LRF - electronic thermal overload relay - 60...100 A - class 10
$466.20
TeSys LRF - electronic thermal overload relay - 200...330 A - class 20
$1031.80
TeSys LRF - electronic thermal overload relay - 300...500 A - class 20
$417.20
TeSys LRF - electronic thermal overload relay - 132...220 A - class 10
$417.20
TeSys LRF - electronic thermal overload relay - 60...100 A - class 20
$417.20
TeSys LRF - electronic thermal overload relay - 90...150 A - class 20
$417.20
TeSys LRF - electronic thermal overload relay - 90...150 A - class 10
$417.20
TeSys LRF - electronic thermal overload relay - 132...220 A - class 20
$103.25
TeSys K - non differential thermal overload relays - 8...11.5 A - class 10A
$82.60
TeSys K - non differential thermal overload relays - 2.6...3.7 A - class 10A
$151.47
TeSys K - non differential thermal overload relays - 1.2...1.8 A - class 10A
$82.60
TeSys K - differential thermal overload relays - 12...16 A - class 10A
$82.60
TeSys K - differential thermal overload relays - 10...14 A - class 10A
$82.60
TeSys K - differential thermal overload relays - 8...11.5 A - class 10A
$82.60
TeSys K, differential thermal overload relay, 5.5 to 8 A, class 10A
$82.60
TeSys K, differential thermal overload relay, 3.7 to 5.5 A, class 10A
$82.60
TeSys K, differential thermal overload relay, 2.6 to 3.7 A, class 10A
$82.60
TeSys K, differential thermal overload relay, 1.8 to 2.6 A, class 10A
$82.60
TeSys K - differential thermal overload relays - 1.2...1.8 A - class 10A
$82.60
TeSys K - differential thermal overload relays - 0.8...1.2 A - class 10A
$82.60
TeSys K - differential thermal overload relays - 0.54...0.8 A - class 10A
$82.60
TeSys K - differential thermal overload relays - 0.36...0.54 A - class 10A
$82.60
TeSys K - differential thermal overload relays - 0.23...0.36 A - class 10A
$82.60
TeSys K - differential thermal overload relays - 0.16...0.23 A - class 10A
$82.60
TeSys K - differential thermal overload relays - 0.11...0.16 A - class 10A
$90.17
TeSys LRD - electronic thermal overload relay - 3P - 0.1...0.5 A
$417.20
TeSys LRD - electronic thermal overload relay - 60...100 A - class 10...20
$417.20
TeSys LRD - electronic thermal overload relay - 90...150 A - class 10...20
$351.41
TeSys LRD - electronic thermal overload relay - 3P - 22…110A
$90.17
Electronic thermal overload relay, TeSys LRD, 3 pole, 0.4A to 2A
$90.73
Electronic thermal overload relay, TeSys LRD, 3 pole, 1.6A to 8A
$91.31
Electronic thermal overload relay, TeSys LRD, 3 pole, 6.4A to 32A
$86.80
Thermal overload relay, TeSys LRD, 5.5...8 A, class 10A, TQ 10