MARS - Motors & Armatures 61472 Definite Purpose Contactor User Manual

1. Introducción

This manual provides essential information for the safe and effective installation, operation, and maintenance of the MARS - Motors & Armatures 61472 Definite Purpose Contactor. This 3-pole contactor is designed for specific applications, featuring a 208-240V coil voltage (50/60Hz) and suitable for inductive loads up to 60 FLA and resistive loads up to 75 FLA. It is equipped with box lug/dual QC terminals and meets UL standards. Please read this manual thoroughly before any installation or operation.

2. Información de seguridad

ADVERTENCIA: Electrical shock hazard. Installation and servicing should only be performed by qualified personnel. Disconnect all power before installing or servicing this device. Failure to follow these instructions may result in serious injury or death.

• Always ensure power is disconnected at the source before working on the contactor or associated wiring.
• Utilice equipo de protección personal (EPP) adecuado, incluidos guantes aislantes y gafas de seguridad.
• Verifique el vol. correctotage and current ratings before installation to prevent damage to the contactor or connected equipment.
• Asegúrese de que todas las conexiones del cableado sean seguras y cumplan con los códigos eléctricos locales.
• This contactor is designed for definite purpose applications. Do not use it for general-purpose switching unless specified.

3. Producto terminadoview

The MARS 61472 contactor is a robust electrical switching device used to control high-current loads, typically in HVAC, refrigeration, or motor control applications. It operates by using a low-power control signal to switch a higher-power circuit.

3.1. Componentes y etiquetado

Figura 1: MARS 61472 Definite Purpose Contactor. This image displays the main body of the contactor, including its three power poles with box lug terminals and dual quick-connect (QC) terminals. The top label clearly indicates the model number "61460" (note: the product is 61472, but the image shows 61460, this is a discrepancy to note), coil voltage "24VAC 50Hz / 24VAC 60Hz", and various electrical ratings such as FLA (Full Load Amps), LRA (Locked Rotor Amps), RES (Resistive Amps), and Horsepower (HP) ratings for 1-phase and 3-phase applications. It also specifies torque requirements for screws (45 Lb-in) and lugs (50 Lb-in), and indicates UL certification for use with Cu 75°C wire.

4. Configuración e instalación

La instalación correcta es crucial para el funcionamiento seguro y confiable del contactor.

4.1. Montaje

• Mount the contactor on a flat, stable surface using appropriate fasteners through the mounting holes on its base.
• Ensure adequate clearance around the contactor for ventilation and wiring.

4.2. Conexiones de cableado

1. Cableado del circuito de alimentación: Connect the main power lines to the appropriate power terminals (L1, L2, L3) and the load to the corresponding load terminals (T1, T2, T3). This contactor has 3 poles.
2. Coil Circuit Wiring: Conecte el control vol.tage (208-240V AC, 50/60Hz) to the coil terminals. Refer to the contactor's label for exact coil voltagy especificaciones.
3. Tipos de terminales: This unit features box lug terminals for main power connections and dual quick-connect (QC) terminals per pole for auxiliary connections or control wiring.
4. Especificaciones de par:
   • Torque for Screws: 45 Lb-in
   • Torque for Lugs: 50 Lb-in
   Ensure all connections are tightened to the specified torque values to prevent loose connections and overheating.
5. Tipo de cable: Use copper (Cu) wire rated for 75°C or higher.
6. Normas UL: Ensure all wiring and installation practices comply with UL standards and local electrical codes.

5. Principios de funcionamiento

The MARS 61472 contactor operates on the principle of electromagnetism. When the specified control voltage (208-240V AC) is applied to the coil terminals, an electromagnetic field is generated. This field pulls an armature, causing the main power contacts to close, thereby allowing current to flow through the connected load. When the control voltage is removed, the electromagnetic field collapses, and springs return the contacts to their open position, interrupting the power to the load.

This definite purpose contactor is specifically designed for applications such as motor starting, heating, and lighting, where the load characteristics are well-defined.

6. Mantenimiento

Regular inspection and maintenance can extend the lifespan of your contactor and ensure safe operation.

• Desconexión de energía: Always disconnect all power to the contactor before performing any maintenance.
• Inspección visual: Periodically inspect the contactor for signs of wear, discoloration, arcing, or loose connections. Check for any foreign objects or debris.
• Estanqueidad del terminal: Re-check the tightness of all terminal connections annually, ensuring they meet the specified torque values (45 Lb-in for screws, 50 Lb-in for lugs).
• Contact Condition: While power is off, visually inspect the main contacts for excessive pitting or erosion. Severely pitted contacts may indicate the need for replacement.
• Limpieza: Keep the contactor clean and free of dust and moisture. Use a dry, non-conductive brush or compressed air for cleaning.

7. Solución de problemas

Esta sección ofrece orientación para problemas comunes. Para problemas complejos, consulte a un electricista cualificado.

8. Especificaciones

Note: The product image label shows model 61460, but the product description and specifications confirm the model is 61472. Please refer to the product packaging and official documentation for the most accurate model number.

9. Garantía y soporte

For information regarding product warranty, returns, or technical support, please contact MARS - Motors & Armatures, Inc. directly or refer to their official webSitio. Conserve su recibo de compra como comprobante de compra.

For additional assistance, you may also contact the seller from whom you purchased this product.