Manual d'instruccions del relé de sobrecàrrega TeSys LRD22 de Schneider Electric

1. Introducció

This instruction manual provides essential information for the safe and effective installation, operation, and maintenance of the Schneider Electric TeSys LRD22 Thermal Overload Relay. Please read this manual thoroughly before attempting any installation or operation to ensure proper function and prevent potential hazards.

2. Informació de seguretat

WARNING: Risk of Electric Shock or Explosion.

• Only qualified personnel should install, operate, service, and maintain this equipment.
• Desconnecteu tota l'alimentació abans de treballar en l'equip.
• Utilitzeu sempre un volum correctament classificattage dispositiu de detecció per confirmar que l'alimentació està apagada.
• Replace all devices, doors, and covers before applying power.
• El no seguir aquestes instruccions provocarà la mort o lesions greus.

Observeu tots els codis i regulacions elèctriques locals i nacionals.

3. Producte acabatview

The Schneider Electric TeSys LRD22 is a thermal overload relay designed to protect AC circuits and motors against overloads, phase failure, and long starting times. It is a Class 10A relay, suitable for applications requiring rapid tripping in case of an overload. The relay features an adjustable current setting and manual reset/stop functions.

Figure 1: TeSys LRD22 Overload Relay Front View
This image displays the front panel of the Schneider Electric TeSys LRD22 Overload Relay. Visible features include the 'TeSys' and 'Schneider Electric' branding, the 'LRD22' model designation, an adjustable current setting dial ranging from 16 to 24 Amperes, and 'RESET' (blue button) and 'STOP' (red button) controls. The bottom section shows terminal markings such as '97 NO', '98 NO', '95 NC', and '96 NC'. The top features three copper connection pins.

Característiques principals:

• Protecció contra sobrecàrrega tèrmica.
• Phase failure sensitivity.
• Adjustable current setting (16-24 A).
• Manual reset and stop functions.
• Direct mounting under contactors or stand-alone mounting.

4. Instal·lació i configuració

4.1 Muntatge

The LRD22 relay can be mounted directly to a compatible contactor or installed as a stand-alone unit using appropriate accessories (sold separately). Ensure secure mounting to prevent vibration and movement.

4.2 Cablejat

1. Ensure all power is disconnected before wiring.
2. Connect the main power circuit through the relay's power terminals (L1, L2, L3 to T1, T2, T3). The copper pins visible on the top of the relay are for connection to the contactor.
3. Connect the control circuit to the auxiliary contacts:
   • 97 NO / 98 NO: Normally Open auxiliary contacts, typically used for signaling an overload condition.
   • 95 NC / 96 NC: Normally Closed auxiliary contacts, typically used to interrupt the contactor coil circuit upon an overload.
4. Assegureu-vos que totes les connexions estiguin estretes i segures.

4.3 Configuració actual

Adjust the current setting dial (visible on the front panel, ranging from 16 to 24 A) to match the motor's full load current (FLC) as specified on the motor's nameplate. Setting the current too high will reduce protection; setting it too low may cause nuisance tripping.

5. Funcionament

5.1 Funcionament normal

Once correctly installed and set, the LRD22 relay continuously monitors the motor current. In normal operating conditions, the relay allows the motor to run without interruption.

5.2 Overload Tripping

If an overload condition occurs (current exceeds the set value for a sustained period) or a phase failure is detected, the relay will trip. When tripped, the normally closed contacts (95-96) will open, and the normally open contacts (97-98) will close, signaling the overload and typically stopping the motor.

5.3 Resetting the Relay

After an overload trip, allow the motor and relay to cool down. To reset the relay, press the blue "RESET" button on the front panel. Ensure the cause of the overload has been identified and rectified before resetting and restarting the motor.

5.4 Stop Function

The red "STOP" button on the front panel can be used to manually trip the relay, interrupting the motor circuit. This is useful for testing or emergency shutdown procedures. After pressing "STOP", the relay must be reset using the blue "RESET" button to resume operation.

6. Manteniment

The TeSys LRD22 overload relay is designed for minimal maintenance. Regular inspection is recommended:

• Inspecció visual: Comproveu periòdicament si hi ha signes de danys físics, decoloració o connexions soltes.
• Neteja: Mantingueu el relé net de pols i brutícia. Utilitzeu un drap sec i suau per netejar-lo. No utilitzeu dissolvents ni productes de neteja abrasius.
• Comprovació de la funcionalitat: Periodically test the "STOP" and "RESET" functions to ensure they operate correctly.

7. Solució De Problemes

8. Especificacions

9. Informació de la garantia

For detailed warranty information regarding your Schneider Electric TeSys LRD22 Overload Relay, please refer to the official Schneider Electric website or contact their customer support. Warranty terms and conditions may vary by region and purchase date.

10. Suport i contacte

If you require technical assistance, have questions about installation, or need to report an issue, please contact Schneider Electric customer support:

• Weblloc: Visita l'oficial Schneider Electric weblloc for support resources, FAQs, and contact details.
• Suport local: Refer to your regional Schneider Electric contact information for localized assistance.