Što je normalno otvoreno (NE) Termostat Switch KSD301?

Termostat prekidač KSD301 Bimetalni disk djeluje u normalno otvorenom (NE) konfiguracija. To znači da je krug u početku otvoren (nepovezan) na normalnim temperaturama. Kad se temperatura digne na unaprijed definirani prag, Bimetalni disk se savija, Zatvaranje kruga i dopuštanje struje struje.

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 Thermostat 40 ° C/104 ° F 10A Obično otvorite N.O Podesite prekidač za temperaturu diska Snap diska

ja. 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:
Nazivni napon: AC 250V (otporno opterećenje) or AC 125V (UL standard)
Nazivna struja: 5A/10A/15A (otporno opterećenje)
‌Temperature performance‌:
Action range: 0℃ ~ 300 ℃ (prilagodljiv), accuracy ±2℃~±10℃17
Reset and action temperature difference: 8℃~100℃ (adjustable)
‌Mechanical characteristics‌:
Kontaktni otpor: ≤50mΩ, izolacijski otpor: ≥100MΩ13
Električna čvrstoća: AC 1800V/1min without breakdown
Vijek trajanja: ≥100,000 times17 (some models up to 150,000 times2)

‌Physical characteristics‌
Razina zaštite: IP00 (no dust and water resistance)
Način ožičenja: priključni terminal 250# ili 187# (angle 0°~90° optional)
Način ugradnje: supports various structures such as movable ring, flat ring, aluminum cover with holes, itd.

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:
Kako se temperatura povećava, 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.

Automatski reset:
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.
U osnovi, 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. Scenariji primjene
Kućanski aparati: aparati za vodu, električni termos, mikrovalne pećnice, ormari za dezinfekciju, električni grijači, strojevi za kavu, itd.
Industrijska oprema: zaštita motora od pregrijavanja, rectifier equipment, strojevi za kaširanje, car heated seats, etc.57.

III. Metoda detekcije (determine whether it is normally open)
‌Multimeter detection‌:
Na sobnoj temperaturi (‌below the action temperature‌): the resistance of the two pins should be infinite (otvoreni krug).
After heating (‌above the action temperature‌): the resistance value drops to ‌tens of ohms‌ (otvoreni krug).
Označavanje razlike: The product body is usually marked with “NE” (Normalno otvoren) ili “Normalno otvoren”.

IV. Prednosti proizvoda
Brza brzina odziva, clean contact action without arcing57;
Visoka točnost kontrole temperature, strong reliability7;
Kompaktna struktura, strong adaptability17.

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