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Descripción básica
ABB A2X38/A2X38.2 is a 3-contactor de CA de polo belonging to the ABB Formula series. A2X38 is an earlier model (interrumpido), while A2X38.2 is its upgraded replacement (currently in production). It is mainly used for controlling three-phase squirrel-cage motors and other power loads, and is suitable for industrial automation and building electrical systems. Código de pedido: 2TFC200010R2511
- Explicación del código del modelo
| Segmento de modelo | Significado |
| A2X | Formula series contactor with compact and cost-effective design |
| 38 | Rated operating current of 38A (AC-3, 400V) |
| 0.2 | Second-generation upgraded version (improved type) |
| 30 | 3-contactos principales de polo, normally open configuration |
| 11 | Configuración de contactos auxiliares: 1 normalmente abierto + 1 normalmente cerrado |
| 13/25 | Código de voltaje de la bobina: 13 = 380-400VAC, 25 = 220-240VAC |
| 380V50/60HZ | Rated coil voltage and frequency |
III. Parámetros técnicos básicos
- Parámetros eléctricos
| Elemento de parámetro | Valor | Observaciones |
| Corriente de funcionamiento nominal (AC-3, 400V) | 38A | Controlled motor power: 18.5kilovatios (50Hz) / 20hp (60Hz) |
| Corriente de funcionamiento nominal (AC-1, 400V) | 50A | Carga resistiva |
| Tensión nominal de aislamiento (interfaz de usuario) | 690V | estándar IEC |
| Voltaje de trabajo nominal (ue) | 400V (AC-3), 690V (AC-1) | |
| Voltaje de la bobina de control | 220-240VACACIONES, 380-400VACACIONES, 110VACACIONES, 24VCA/CC, etc.. | Múltiples opciones disponibles |
| Frecuencia de la bobina | 50/60Hz | Universal design, no adjustment required |
| Vida útil mecánica | ≥10 millones de operaciones | |
| Vida útil eléctrica (AC-3) | ≥1 millón de operaciones | Carga inferior a la nominal |
- Características físicas
| Elemento de parámetro | Valor |
| Método de montaje | Montaje en carril DIN (35carril estándar mm), slider design for one-hand disassembly |
| Dimensiones generales (milímetros) | Approximately 85×105×55 (Width × Height × Depth) |
| Peso | Aproximadamente 0,5 kg |
| Clase de protección | IP20 (main body), IP00 for terminal blocks |
| Temperatura ambiente | -25℃~+55℃ (operation), -40℃~+85℃ (almacenamiento) |
| Grado de contaminación | Grado 3 |
- Características principales del producto
- Diseño compacto: tamaño pequeño, ahorro 30% of installation space, suitable for high-density distribution cabinets.
- High Efficiency and Reliability: Silver alloy contacts with arc resistance, low contact resistance and long service life.
- Fácil instalación: Quick snap-on fixing, auxiliary contact modules can be directly clipped without tools.
- Safety Assurance: Flame-retardant engineering plastic housing complying with UL94 V0 standard, built-in surge suppression (for some models).
- Ampliación modular: Accessories such as auxiliary contacts (arriba a 4 unidades), enclavamientos mecánicos, time-delay heads and surge suppressors can be added.
- Escenarios de aplicación típicos
Control directo de arranque y parada de motores asíncronos trifásicos. (≤18.5kW/400V)
Electrical control of equipment such as fans, bombas de agua y compresores
Switch control of non-motor loads such as heating and lighting systems
Building electrical systems and industrial automation production lines
Replacement of old contactors for equipment upgrading and transformation
- Complete Model and Ordering Information
| Modelo completo | Voltaje de la bobina | Contactos auxiliares | Código de pedido | Estado |
| A2X38-30-01 380V | 380VACACIONES | 0 normalmente abierto + 1 normalmente cerrado | 10221469 | Interrumpido |
| A2X38.2-30-11-13 | 380-400VACACIONES | 1 normalmente abierto + 1 normalmente cerrado | 10242059 | Currently in Production |
| A2X38.2-30-11-25 | 220-240VACACIONES | 1 normalmente abierto + 1 normalmente cerrado | 10242060 | Currently in Production |
| A2X38.2-30-00-13 | 380-400VACACIONES | No auxiliary contacts | 10242058 | Currently in Production |
VII. Installation and Wiring Specifications
Pasos de instalación:
- Confirm that the installation environment meets the range of -25℃~+55℃, free from severe vibration and corrosive gases.
- Select a 35mm standard DIN rail and ensure the mounting surface is flat.
- Align the contactor’s snap with the rail, press down and slide to fix (one-hand operation).
- Cut off all power supplies before wiring, and use a multimeter to confirm no voltage exists.
- Cableado del circuito principal: L1/L2/L3 → input terminals, T1/T2/T3 → output terminals.
- Cableado del circuito de control: A1/A2 → coil power supply, 13/14 → normally open auxiliary contacts, 21/22 → normally closed auxiliary contacts.
- Después de completar el cableado, gently pull the wires to confirm they are connected firmly without loosening.
Terminal Block Specifications:
Circuito principal: M6 bolts, suitable for copper core wires with cross-sectional area of 1.5-16mm²
circuito de control: M3.5 bolts, suitable for copper core wires with cross-sectional area of 0.5-2.5mm²
VIII. Modelos de reemplazo y compatibilidad
| Modelo Original | Modelo de reemplazo directo | Upgraded Replacement Series | Observaciones |
| A2X38 | A2X38.2 | AF38 Series | A2X38.2 is fully compatible with A2X38 in terms of installation dimensions and electrical performance |
| A2X38.2 | AF38-30-xx-xx | AF Series | AF series has advantages such as electronic coil (amplio rango de voltaje) and built-in surge suppression |
| AX38-30-xx | AX Series | Equivalent performance with slightly higher price |
- Guía de solución de problemas
| Fenómeno de falla | Posibles causas | Soluciones |
| El contactor no logra entrar | No voltage/low voltage on coil; Quemado de bobina; Atasco mecánico | Check the control circuit; Medir la resistencia de la bobina (approximately several hundred ohms under normal condition); Clean foreign objects and lubricate moving parts |
| Excessive noise after pull-in | Bajo voltaje de la bobina; Oil stain/rust on iron core end face; Broken short-circuit ring | Adjust control voltage to rated value; Clean iron core end face; Replace coil assembly |
| Contact overheating/ablation | Sobrecarga de carga; Mal contacto de contactos.; Cableado suelto | Check load current; Polish contacts or replace them; Re-tighten terminal blocks |
| Fallo de contacto auxiliar | Contact wear; Error de cableado | Replace auxiliary contact module; Check wiring polarity |
- Safety and Maintenance Precautions
- Operación de apagado: Cut off all power supplies before installation and maintenance, and hang the “Sin encendido” sign.
- Inspección periódica: Conduct inspection every 6 meses, including contact wear, terminal tightness and coil temperature.
- Contact Replacement: Replace the main contacts in time when the wear amount exceeds 1mm or the surface is severely ablated.
- Requisitos ambientales: Avoid use in humid and dusty environments; install a protective housing if necessary.
- Accesorios compatibles: Only use auxiliary contacts, interlock devices and other accessories original or certified by ABB to ensure safety performance.
