Relè termici di sovraccarico
Compare VIOX thermal overload relay series for motor overload protection and coordinated contactor starters. Confirm adjustment range, trip characteristics and contactor compatibility by model.
Protezione da sovraccarico motoreResponds to sustained overload
Current adjustmentMatch the motor nameplate
Starter coordinationPair with contactor and SCPD
Reset and signalingConfirm model functions
Cos'è un relè termico di sovraccarico?
A thermal overload relay monitors motor current and operates its control contacts when a sustained overload condition exceeds its time-current characteristics. It is commonly coordinated with a contactor in a motor starter.
An overload relay does not normally provide short-circuit interruption. Its adjustment range, trip behavior, phase sensitivity, reset mode, auxiliary contacts, contactor compatibility and upstream short-circuit protection must be selected together.
Overload Relay Series Overview
Compare published VIOX models using facts already available in product data.
VIOX JR28
Relè termico di sovraccaricoReview model data
VIOX JR36
Relè termico di sovraccaricoReview model data
VIOX LR2-D13
Relè termico di sovraccaricoReview model dataVIOX LR2-D23
Relè termico di sovraccaricoReview model data
VIOX LR2-D33
Relè termico di sovraccaricoReview model data
New Type Thermal Relay LRD-13
Relè termico di sovraccaricoReview model dataHow to choose an overload relay
Begin with the motor nameplate current and starter combination, then verify trip and reset requirements.
Intervallo di regolazione
Select a range that includes the motor rated current and follow the setting instructions.
Caratteristiche del viaggio
Match starting time, duty and applicable motor-protection requirements.
Compatibilità con il contattore
Confirm mechanical mounting, current path and accessory compatibility.
Reset and auxiliary functions
Define manual or automatic reset, test, stop and signaling needs.
Coordinate three protection roles
A complete starter coordinates switching, overload response and short-circuit protection.
Compare published Overload Relay series
Blank cells mean the value is not available in the current product summary. Open the model page or request its datasheet before specification.
| Serie | Intervallo di regolazione | Classe di intervento | Reset | Contactor series |
|---|---|---|---|---|
| VIOX JR28 | — | — | — | — |
| VIOX JR36 | — | — | — | — |
| VIOX LR2-D13 | — | — | — | — |
| VIOX LR2-D23 | — | — | — | — |
| VIOX LR2-D33 | — | — | — | — |
| New Type Thermal Relay LRD-13 | — | — | — | — |
Overload Relay Applications
Typical environments where the exact product characteristics must be verified.
Overload Relay Selection Questions
Quick answers for preliminary product-family comparison before detailed circuit verification.
What does a thermal overload relay protect against?
It responds to sustained motor overload according to its characteristics and operates the starter control circuit. Exact protection functions vary by model.
Does an overload relay provide short-circuit protection?
Normally no. A coordinated fuse, circuit breaker or motor protective device is required for short-circuit protection.
How is the adjustment range selected?
Choose a relay range that includes the motor nameplate current, then set and commission it according to the motor, starter and product instructions.
What is trip class?
Trip class describes the relay operating-time characteristic under specified overload conditions. The required class depends on the motor starting and protection needs.
Must the relay match the contactor?
Yes. Verify electrical rating, direct-mount or separate-mount compatibility, terminal arrangement and accessory coordination.
Need the Right Overload Relay?
Let’s Coordinate the Motor Starter.
Send the motor nameplate current, starting duty, contactor series, reset requirements, quantity and target market. VIOX will help narrow the relevant published series.
Request Overload Relay Support