Relés de sobrecarga térmica
Compare VIOX thermal overload relay series for motor overload protection and coordinated contactor starters. Confirm adjustment range, trip characteristics and contactor compatibility by model.
Proteção contra sobrecarga de motorResponds to sustained overload
Current adjustmentMatch the motor nameplate
Starter coordinationPair with contactor and SCPD
Reset and signalingConfirm model functions
O que é um relé de sobrecarga térmico?
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 os modelos VIOX publicados usando fatos já disponíveis nos dados do produto.
VIOX JR28
Relé de sobrecarga térmicoRevisar dados do modelo
VIOX JR36
Relé de sobrecarga térmicoRevisar dados do modelo
VIOX LR2-D13
Relé de sobrecarga térmicoRevisar dados do modeloVIOX LR2-D23
Relé de sobrecarga térmicoRevisar dados do modelo
VIOX LR2-D33
Relé de sobrecarga térmicoRevisar dados do modelo
New Type Thermal Relay LRD-13
Relé de sobrecarga térmicoRevisar dados do modeloHow to choose an overload relay
Begin with the motor nameplate current and starter combination, then verify trip and reset requirements.
Faixa de ajuste
Select a range that includes the motor rated current and follow the setting instructions.
Características da viagem
Match starting time, duty and applicable motor-protection requirements.
Compatibilidade com o contator
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
Células em branco significam que o valor não está disponível no resumo do produto atual. Abra a página do modelo ou solicite a sua ficha técnica antes da especificação.
| Série | Faixa de ajuste | Classe de disparo | Reiniciar | Contactor series |
|---|---|---|---|---|
| VIOX JR28 | — | — | — | — |
| VIOX JR36 | — | — | — | — |
| VIOX LR2-D13 | — | — | — | — |
| VIOX LR2-D23 | — | — | — | — |
| VIOX LR2-D33 | — | — | — | — |
| New Type Thermal Relay LRD-13 | — | — | — | — |
Overload Relay Applications
Ambientes típicos onde as características exatas do produto devem ser verificadas.
Overload Relay Selection Questions
Respostas rápidas para comparação preliminar de famílias de produtos antes da verificação detalhada do circuito.
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