1. Toote lõppview
The ABB S203-B16 is a low voltage, 3-pole miniature circuit breaker designed for equipment protection. It features a 480Y/277 VAC voltage rating, a 16 A amperage rating, and an interrupt rating of 6 kA.
This device incorporates thermal/magnetic trip mechanisms for reliable overcurrent fault protection in various applications, including commercial appliances, control circuits, and computer equipment.

Joonis 1: Esiosa view of the ABB S203-B16 Miniature Circuit Breaker, showing the toggle switch and model markings.
2. Ohutusalane teave
Always adhere to local electrical codes and regulations during installation and operation. Installation should only be performed by qualified personnel.
- Enne paigaldamist või hooldust veenduge, et toide oleks lahti ühendatud.
- Ärge kasutage kaitselülitit, kui see näib olevat kahjustatud.
- Kandke sobivaid isikukaitsevahendeid (PPE).
- Refer to the wiring diagrams for correct connections.
3. Seadistamine ja installimine
The S203-B16 circuit breaker is designed for DIN-rail mounting.
- Paigaldamine: Securely attach the circuit breaker to a standard DIN-rail. Ensure the mounting clip engages properly.
- Juhtmed: Connect the electrical conductors to the screw terminals. The wire size supported is 18 - 4 AWG for conductors and 18 - 8 AWG for busbars.
- Terminal Tightening: Ensure all screw terminals are tightened to the specified torque to prevent loose connections and overheating.

Joonis 2: Tagumine view illustrating the DIN-rail mounting mechanism.

Joonis 3: Ülemine view showing the input terminals of the circuit breaker.

Joonis 4: Alt view showing the output terminals of the circuit breaker.
4. Kasutusjuhised
The ABB S203-B16 circuit breaker is operated via a toggle actuator.
- SISSE lülitamiseks: Push the toggle actuator upwards to the "ON" position.
- VÄLJA lülitamiseks: Push the toggle actuator downwards to the "OFF" position.
- Reisi näit: In case of an overcurrent or short circuit, the toggle actuator will automatically move to an intermediate "TRIPPED" position.
- Resetting After Trip: To reset the circuit breaker after a trip, first move the toggle completely to the "OFF" position, then push it upwards to the "ON" position. Investigate the cause of the trip before resetting.
5. Hooldus
The ABB S203-B16 circuit breaker requires minimal maintenance. Regular inspections are recommended to ensure proper function and safety.
- Visuaalne kontroll: Kontrollige kaitselülitit perioodiliselt füüsiliste kahjustuste, värvimuutuse või lahtiste ühenduste suhtes.
- Puhastamine: If necessary, clean the exterior of the circuit breaker with a dry, lint-free cloth. Do not use abrasive cleaners or solvents.
- Terminali kontroll: Verify that all terminal connections remain tight.
- Keskkonnatingimused: Ensure the operating environment remains within the specified temperature range (-25 to 55 deg C) and IP20 enclosure rating.
6. Veaotsing
| Probleem | Võimalik põhjus | Lahendus |
|---|---|---|
| Kaitselüliti rakendub sageli. | Overload, short circuit, or faulty appliance/wiring. | Reduce load, check for short circuits, inspect connected equipment and wiring. |
| Kaitselüliti ei lähtestu. | Persistent fault, internal damage. | Ensure the fault is cleared. If it still doesn't reset, the unit may be damaged and require replacement. Consult a qualified electrician. |
| Circuit breaker feels hot. | Overload, loose connections, or internal fault. | Reduce load, check terminal tightness, or replace the unit if overheating persists without apparent cause. |
If troubleshooting steps do not resolve the issue, contact a qualified electrician or ABB customer support.
7. Tehnilised andmed
| Funktsioon | Detail |
|---|---|
| Mudel | S203-B16 |
| Tüüp | Madal kdtage Miniature Circuit Breaker |
| Pooluste arv | 3 |
| Voltage Hinnang | 480Y/277 VAC |
| Amperage'i hinnang | 16 A |
| Sagedushinnang | 50/60 Hz |
| Katkestuste reiting | 6 kA |
| Reisi tüüp | Thermal/Magnetic |
| Reisivahemik | 3 - 5 A Magnetic and 1.13 - 1.45 A Thermal |
| Täiturmehhanismi tüüp | Lülita |
| Traadi suurus | 18 - 4 AWG Conductor, 18 - 8 AWG Busbar |
| Terminali tüüp | Kruvi |
| Korpuse tüüp | IP20 |
| Paigaldustüüp | DIN-rööp |
| Temperatuuri hinnang | -25 kuni 55 ° C |
| Mõõtmed | 88 mm Height x 52-1/2 mm Width x 69 mm Depth |
| Materjal | Vormitud plastik |
| Standards/Approvals | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 |

Joonis 5: Külg view displaying product specifications and international certifications.

Joonis 6: Külg view showing the product barcode and manufacturing details.
8. Garantii teave
For detailed warranty information regarding your ABB S203-B16 Miniature Circuit Breaker, please refer to the official ABB warranty policy available on the manufacturer's website or contact ABB customer service directly. Keep your purchase receipt as proof of purchase.
9. Klienditugi
If you require technical assistance, have questions about installation, operation, or maintenance, please contact ABB customer support.
- ABB Official Websait: www.abb.com
- Tehniline tugi: Refer to the support section on the ABB website for contact numbers and online resources specific to your region.





