Thermal Overload Relays
Compare VIOX thermal overload relay series for motor overload protection and coordinated contactor starters. Confirm adjustment range, trip characteristics and contactor compatibility by model.
Proteksyon laban sa overload ng motorResponds to sustained overload
Current adjustmentMatch the motor nameplate
Starter coordinationPair with contactor and SCPD
Reset and signalingConfirm model functions
Ano ang thermal overload relay?
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
Paghambingin ang mga nailathalang modelo ng VIOX gamit ang mga katotohanang available na sa data ng produkto.
VIOX JR28
Thermal overload relaySuriin ang data ng modelo
VIOX JR36
Thermal overload relaySuriin ang data ng modelo
VIOX LR2-D13
Thermal overload relaySuriin ang data ng modeloVIOX LR2-D23
Thermal overload relaySuriin ang data ng modelo
VIOX LR2-D33
Thermal overload relaySuriin ang data ng modelo
New Type Thermal Relay LRD-13
Thermal overload relaySuriin ang data ng modeloHow to choose an overload relay
Begin with the motor nameplate current and starter combination, then verify trip and reset requirements.
Saklaw ng pagsasaayos
Select a range that includes the motor rated current and follow the setting instructions.
Mga katangian ng paglalakbay
Match starting time, duty and applicable motor-protection requirements.
Compatibility ng contactor
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
Ang mga bakanteng cell ay nangangahulugang hindi available ang value sa kasalukuyang buod ng produkto. Buksan ang pahina ng modelo o humingi ng datasheet nito bago ang espesipikasyon.
| Serye | Saklaw ng pagsasaayos | Trip class | I-Reset ang | Contactor series |
|---|---|---|---|---|
| VIOX JR28 | — | — | — | — |
| VIOX JR36 | — | — | — | — |
| VIOX LR2-D13 | — | — | — | — |
| VIOX LR2-D23 | — | — | — | — |
| VIOX LR2-D33 | — | — | — | — |
| New Type Thermal Relay LRD-13 | — | — | — | — |
Overload Relay Applications
Mga karaniwang kapaligiran kung saan dapat tiyakin ang eksaktong katangian ng produkto.
Overload Relay Selection Questions
Mabilis na sagot para sa paunang paghahambing ng pamilya ng produkto bago ang detalyadong beripikasyon ng circuit.
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