رلههای اضافه بار حرارتی
Compare VIOX thermal overload relay series for motor overload protection and coordinated contactor starters. Confirm adjustment range, trip characteristics and contactor compatibility by model.
حفاظت در برابر اضافه بار موتورResponds to sustained overload
Current adjustmentMatch the motor nameplate
Starter coordinationPair with contactor and SCPD
Reset and signalingConfirm model functions
رله اضافهبار حرارتی چیست؟
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
مدلهای منتشر شده VIOX را با استفاده از حقایق موجود در دادههای محصول مقایسه کنید.
VIOX JR28
رله اضافه بار حرارتیبررسی دادههای مدل
VIOX JR36
رله اضافه بار حرارتیبررسی دادههای مدل
VIOX LR2-D13
رله اضافه بار حرارتیبررسی دادههای مدلVIOX LR2-D23
رله اضافه بار حرارتیبررسی دادههای مدل
VIOX LR2-D33
رله اضافه بار حرارتیبررسی دادههای مدل
New Type Thermal Relay LRD-13
رله اضافه بار حرارتیبررسی دادههای مدلHow to choose an overload relay
Begin with the motor nameplate current and starter combination, then verify trip and reset requirements.
محدوده تنظیم
Select a range that includes the motor rated current and follow the setting instructions.
ویژگیهای سفر
Match starting time, duty and applicable motor-protection requirements.
سازگاری با کنتاکتور
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
خانههای خالی به این معنی است که مقدار مورد نظر در خلاصه محصول فعلی موجود نیست. پیش از مشخصات فنی، صفحه مدل را باز کنید یا برگه اطلاعات (دیتاشیت) آن را درخواست نمایید.
| سری | محدوده تنظیم | کلاس تریپ (Trip class) | تنظیم مجدد | Contactor series |
|---|---|---|---|---|
| VIOX JR28 | — | — | — | — |
| VIOX JR36 | — | — | — | — |
| VIOX LR2-D13 | — | — | — | — |
| VIOX LR2-D23 | — | — | — | — |
| VIOX LR2-D33 | — | — | — | — |
| New Type Thermal Relay LRD-13 | — | — | — | — |
Overload Relay Applications
محیطهای متداولی که ویژگیهای دقیق محصول باید در آنها بررسی شود.
Overload Relay Knowledge & Selection Guides
تمامی مقالات
Overload Relay Selection Questions
پاسخهای سریع برای مقایسه اولیه خانواده محصولات پیش از بررسی دقیق مدار.
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