چی دیتە بینی بەرەوەرێکی مەگناتیکی و بەرەوەرێکی گرمیدانە لە کۆتایەکەردا؟

Diferansên Jiyanê yên Birya Trip û Thermomagnetic Trip di Circuit Breakeran de

Di circuit breakeran de, birya trip (Magnetic Trip Unit) û thermomagnetic trip (Thermomagnetic Trip Unit) du mekanîzmên parastin ji bo detektkirina û pêşkeftin da ku li ser şertên overcurrent da bikin. Ji navbera wan dibejiyan sernavên herêmî:

1. Prinsîpê Xebitandî

Birya Trip

Prinsîpê Xebitandî: Birya trip short circuits an instantaneous high currents bi electromagnetic induction detekt dikin. Wanê ku current pêşdibedê threshold-ê bigihin, electromagnet force-ê piştgirî dikin ku tripping mechanism aktive bike, li ser çend milisecond circuit disconect bike.

• Speed-ê Pêşkeftin: Birya trip li ser instantaneous high currents pir hewl dikin û di navbera çend milisecond de pêşkeftin dikin, ku wê ideal ye ji bo short-circuit protection.

• Range-ê Current: Pir bêtik li ser short-circuit currents bînin, ku pir zêde têne ku rated current.

• Temperature Influence: Birya trip nayên teyên temperature changes, ji ber vê operaçûn-ê ya electromagnetic induction ne, ne temperature.

Thermomagnetic Trip Unit

• Prinsîpê Xebitandî: Thermomagnetic trip unit thermal û magnetic effects yek bikin. Wê bimetallic strip (ji du metalên bi coefficient of thermal expansion din yek bînin) bikar hene bi prolonged overload currents detekt bikin. Wanê ku current pêşdibedê rated value bigihin, bimetallic strip li ser heat deform bike, tripping mechanism trigger bike. Tenha, wê magnetic trip component ên bi instantaneous high currents detekt bikin.

• Speed-ê Pêşkeftin: Ji bo overload currents, thermomagnetic trip unit li ser thermal expansion of the bimetallic strip pêşkeftin dikin, ku li ser several seconds to a few minutes bigihin. Ji bo short-circuit currents, magnetic part of the thermomagnetic trip unit fast response dikin.

• Range-ê Current: Thermomagnetic trip unit overload û short-circuit currents jîn protection provide dikin, range-ê yekdar wider of current levels, especially for prolonged overload conditions.

• Temperature Influence: Thermal trip portion of the thermomagnetic unit li ser ambient temperature pir influenced dikin, ji ber vê operaçûn-ê ya thermal expansion of the bimetallic strip ne. Therefore, design-ê thermomagnetic trip units li ser temperature variations account dikin bi tenha accurate operation under different conditions.

2. Scenario-ê Application

Birya Trip Unit

• Applicable Scenarios: Li girêdan ji bo short-circuit protection applications requiring rapid response to instantaneous high currents. Examples include industrial equipment, power distribution systems, û motors.

• Advantages: Fast response time, effectively cutting off short-circuit currents to prevent equipment damage.

• Disadvantages: Only suitable for short-circuit protection and cannot effectively handle prolonged overload currents.

Thermomagnetic Trip Unit

• Applicable Scenarios: Suitable for both overload and short-circuit protection, especially in situations where both types of overcurrent need to be addressed. Examples include residential circuits, commercial buildings, û small industrial equipment.

• Advantages: Can handle both overload and short-circuit currents, providing a broader range of protection. For overload currents, it offers a delayed response, preventing nuisance trips due to brief current surges.

• Disadvantages: Slower response to short-circuit currents compared to a pure magnetic trip unit.

3. Structure û Design

Birya Trip Unit

• Simple Structure: Birya trip unit simple structure yek dikin, consisting mainly of an electromagnet û tripping mechanism. It lacks complex mechanical components, enhancing reliability.

• Independence: Birya trip unit typically operates as an independent protection unit, specifically for short-circuit protection.

Thermomagnetic Trip Unit

• Complex Structure: Thermomagnetic trip unit bimetallic strip û electromagnet yek bikin, resulting in a more complex structure. It has both a thermal trip section û magnetic trip section, allowing it to handle both overload û short-circuit conditions.

• Integration: Thermomagnetic trip unit usually integrated into the circuit breaker as a single protection device, suitable for multiple protection needs.

4. Cost û Maintenance

Birya Trip Unit

• Lower Cost: Due to its simple structure, birya trip unit generally less expensive û requires minimal maintenance.

• Simple Maintenance: Maintenance for birya trip unit straightforward, primarily involving checking the condition of the electromagnet û tripping mechanism.

Thermomagnetic Trip Unit

• Higher Cost: The more complex structure of the thermomagnetic trip unit makes it relatively more expensive, especially for high-quality units.

• Complex Maintenance: Maintenance for the thermomagnetic trip unit is more involved, requiring periodic inspection of the bimetallic strip to ensure proper operation under varying temperatures.

Summary

• Birya Trip Unit: Best suited for short-circuit protection, offering fast response times, a simple structure, û lower costs. However, it only handles instantaneous high currents.

• Thermomagnetic Trip Unit: Suitable for both overload û short-circuit protection, with a slower response to overload currents but a broader application range. It is more complex û costly but provides comprehensive protection.