1. Introdución
This manual provides essential information for the safe and effective use of the ABB OS30FAJ12 Disconnect Switch. This device is designed for industrial applications, rated for 600 VAC, 3 horsepower, 30 Amperes, and features 3 poles. Please read this manual thoroughly before installation or operation to ensure proper functionality and safety.

Figura 1: Principal view of the ABB OS30FAJ12 Disconnect Switch with a fuse puller inserted, showing its compact design and robust construction.
2. Información de seguridade
WARNING: Risk of electric shock. Only qualified personnel should install, operate, or service this equipment.
- Always disconnect power before working on the switch or connected circuits.
- Ensure proper grounding and bonding according to local electrical codes.
- Empregar o equipo de protección individual (EPI) axeitado, incluíndo luvas illantes e protección ocular.
- Do not operate the switch if it is damaged or if any components are missing.
- Verificar voltage e as clasificacións de corrente antes de conectar a calquera circuíto.
3. Configuración e instalación
The ABB OS30FAJ12 Disconnect Switch is designed for panel mounting. Follow these steps for proper installation:
- Montaxe: Securely mount the disconnect switch to a stable surface or within an electrical enclosure using appropriate fasteners.
- Cableado: Connect the incoming power supply to the designated input terminals and the load to the output terminals. Ensure all connections are tight and secure. The terminal type is screw, and the recommended terminal torque is 17 LB.IN.
- Instalación de fusibles: This switch requires Class J fuses. Insert three 30A Class J fuses into the designated fuse holders. Ensure fuses are correctly seated.

Figura 2: Lateral view of the disconnect switch, displaying the product label with model number OS30FAJ12, voltage ratings (600 VAC), horsepower ratings, and terminal torque specifications. This label provides critical information for correct wiring and application.

Figura 3: detallada view of the fuse compartments, showing "Class J" and "Max. 30A" labels, and recommendations for "Bussmann LOW-PEAK" fuses. This highlights the specific fuse type required for safe operation.
4. Instrucións de funcionamento
The ABB OS30FAJ12 Disconnect Switch operates in an OFF-NONE-ON mode. It is designed for general purpose switch applications.
- Activando: To engage the circuit, move the operating handle to the "ON" position.
- Desactivando: To disconnect the circuit, move the operating handle to the "OFF" position.
- Substitución de fusibles: If a fuse blows, first ensure the switch is in the "OFF" position and the circuit is de-energized. Use a fuse puller tool to safely remove the blown fuse and replace it with a new 30A Class J fuse.

Figure 4: Close-up of the fuse puller tool, showing its design for safe and easy removal and insertion of fuses. This tool is essential for maintenance and fuse replacement.

Figura 5: De arriba abaixo view of the disconnect switch with the fuse puller engaged, demonstrating how the tool interacts with the fuse slots for removal or insertion. This illustrates the practical application of the fuse puller.
5. Mantemento
Regular maintenance ensures the longevity and reliable operation of your ABB OS30FAJ12 Disconnect Switch.
- Inspección periódica: Annually inspect the switch for any signs of physical damage, loose connections, or discoloration due to overheating.
- Limpeza: Keep the switch free from dust and debris. Use a dry, non-abrasive cloth for cleaning. Do not use liquid cleaners.
- Comprobación do terminal: Periodically check terminal screws for tightness, especially after initial installation and during routine maintenance.
6 Solución de problemas
If you encounter issues with your disconnect switch, refer to the following common problems and solutions:
| Problema | Causa posible | Solución |
|---|---|---|
| Switch does not turn on. | No incoming power; Blown fuse; Loose wiring. | Check main power supply; Inspect and replace fuses; Verify all wiring connections are secure. |
| Switch feels hot during operation. | Overload; Loose connections. | Reduce load; Check and tighten all terminal connections. If problem persists, consult a qualified electrician. |
| Fuses blow frequently. | Overcurrent; Short circuit; Incorrect fuse rating. | Investigate the connected load for overcurrent conditions; Check for short circuits in the wiring; Ensure correct 30A Class J fuses are used. |
7. Especificacións
| Característica | Detalle |
|---|---|
| Número de modelo | OS30FAJ12 |
| Marca | FIG |
| Valoración actual | 30 Amps |
| Vol. Operativotage | 600 voltios AC |
| Polos | 3 |
| Valoración de cabalos de potencia | 3 cv |
| Modo de operación | OFF-NONE-ON |
| Tipo de contacto | Normalmente aberto |
| Tipo de conector | Parafusos |
| Tipo de terminal | Parafuso |
| Tipo de circuíto | 1 vías |
| Tipo de actuador | Pulsador |
| Material de contacto | Cobre |
| Máx. Tamaño do fusible | 30A (Class J) |
| Par terminal | 17 LB.IN. |
| Compatibilidade de cables | 18-8 AWG 75°C Copper stranded only |
| Dimensións do paquete | 9 x 5 x 5 polgadas |
| Peso do elemento | 1.69 libras |
| Data de primeira dispoñibilidade | 29 de marzo de 2016 |
8. Garantía e soporte
For information regarding product warranty, technical support, or service, please contact ABB customer service or visit the official ABB websitio. Garde o recibo da compra como xustificante da mesma.
ABB Customer Service: Please refer to the contact information provided on the ABB official websitio ou embalaxe do produto.
Recursos en liña: For additional documentation, FAQs, and support, visit the ABB Store on Amazon or the main ABB websitio.





