열 과부하 릴레이
Compare VIOX thermal overload relay series for motor overload protection and coordinated contactor starters. Confirm adjustment range, trip characteristics and contactor compatibility by model.
모터 과부하 보호Responds to sustained overload
Current adjustmentMatch the motor nameplate
Starter coordinationPair with contactor and SCPD
Reset and signalingConfirm model functions
열동형 과부하 계전기란 무엇입니까?
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
제품 데이터에 이미 제공된 사실을 사용하여 게시된 VIOX 모델을 비교하십시오.
How to choose an overload relay
Begin with the motor nameplate current and starter combination, then verify trip and reset requirements.
조정 범위
Select a range that includes the motor rated current and follow the setting instructions.
여행 특성
Match starting time, duty and applicable motor-protection requirements.
접촉기 호환성
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
빈 셀은 현재 제품 요약에서 해당 값을 사용할 수 없음을 의미합니다. 사양을 확인하기 전에 모델 페이지를 열거나 데이터시트를 요청하십시오.
| 시리즈 | 조정 범위 | 트립 클래스(Trip class) | 초기화 | Contactor series |
|---|---|---|---|---|
| VIOX JR28 | — | — | — | — |
| VIOX JR36 | — | — | — | — |
| VIOX LR2-D13 | — | — | — | — |
| VIOX LR2-D23 | — | — | — | — |
| VIOX LR2-D33 | — | — | — | — |
| New Type Thermal Relay LRD-13 | — | — | — | — |
Overload Relay Knowledge & Selection Guides
모든 게시물
Overload Relay Selection Questions
상세 회로 검증 전 제품군 비교를 위한 빠른 답변.
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