Mis on tavaliselt avatud (EI) Termostaadi lüliti KSD301?

Termostaadi lüliti KSD301 bimetallketas töötab normaalselt avatud olekus (EI) konfiguratsiooni. See tähendab, et vooluahel on algselt avatud (lahti ühendatud) normaalsetel temperatuuridel. Kui temperatuur tõuseb etteantud läveni, bimetallketas paindub, vooluringi sulgemine ja voolu võimaldamine.

Normally open THERM-O-DISC T-O-D THERMAL LIMIT SWITCH L160-40F 60TX01

UL/CUL KSD301 Shutoff Thermostat,Normally Open NO Bimetal Snap Disc 125V 16A Auto Reset

uxcell KSD301 termostaat 40°C/104°F 10A Tavaliselt avatud N.O Reguleerige Snap Disc temperatuuri lüliti

I. Core Features
‌Operation Principle‌
When the temperature rises to the set value, the contact automatically connects the circuit; when the temperature drops to the reset value, the contact automatically disconnects the circuit, which is the opposite of the normally closed type (disconnected when the temperature rises and connected when the temperature drops).

The bimetallic strip is heated and deformed to trigger the mechanism to achieve fast switching.

‌Technical Parameters‌
‌Electrical Specifications‌:
Nimipinge: AC 250V (takistuslik koormus) or AC 125V (UL standard)
Nimivool: 5A/10A/15A (takistuslik koormus)
‌Temperature performance‌:
Action range: 0℃~300℃ (customizable), accuracy ±2℃~±10℃17
Reset and action temperature difference: 8℃~100℃ (adjustable)
‌Mechanical characteristics‌:
Kontakti takistus: ≤50mΩ, insulation resistance: ≥100MΩ13
Elektriline tugevus: AC 1800V/1min without breakdown
Kasutusaeg: ≥100,000 times17 (some models up to 150,000 times2)

‌Physical characteristics‌
Kaitse tase: IP00 (no dust and water resistance)
Juhtmete ühendamise meetod: pistikterminal 250# või 187# (angle 0°~90° optional)
Paigaldusmeetod: supports various structures such as movable ring, flat ring, aluminum cover with holes, jne.

Normally Open State:
The KSD301 is designed to have its contacts in an open state when the surrounding temperature is below the specified operating temperature. This means the circuit connected to the KSD301 is broken, preventing current flow.

Temperature Trigger:
Kui temperatuur tõuseb, the bimetallic disc (made of two different metals bonded together) responds to the temperature change. The two metals expand at different rates, causing the disc to bend.

Circuit Closure:
When the temperature reaches the set point, the disc bends enough to close the circuit, establishing a connection between the contacts. This allows current to flow through the circuit.

Automaatne lähtestamine:
Once the temperature drops below a certain level, the bimetallic disc returns to its original shape, opening the circuit again and cutting off the current flow. This is an automatic reset feature.
Sisuliselt, the KSD301 is used as a thermal switch to control current flow based on temperature, acting as a temperature sensor and protector for various applications.

II. Application scenarios
Kodumasinad: veeautomaadid, elektriline termos, mikrolaineahjud, desinfitseerimiskapid, elektrilised küttekehad, kohvimasinad, jne.
Tööstuslikud seadmed: motor overheat protection, rectifier equipment, lamineerimismasinad, car heated seats, etc.57.

III. Detection method (determine whether it is normally open)
‌Multimeter detection‌:
Toatemperatuuril (‌below the action temperature‌): the resistance of the two pins should be infinite (avatud vooluring).
After heating (‌above the action temperature‌): the resistance value drops to ‌tens of ohms‌ (avatud vooluring).
‌Marking distinction‌: The product body is usually marked with “EI” (Tavaliselt avatud) või “Tavaliselt avatud”.

IV. Toote eelised
Fast response speed, clean contact action without arcing57;
High temperature control accuracy, strong reliability7;
Compact structure, strong adaptability17.

⚠️ Note: The actual selection needs to confirm the specific temperature threshold (such as 85℃, 95℃, jne.) and the reset temperature difference. The parameters of different models may vary.