Introduzione
This manual provides essential information for the safe and effective installation, operation, and maintenance of the Schneider Electric LRD16 Overload Relay. The LRD16 is a TeSys D Class 10 thermal overload relay designed to protect AC circuits and motors against overloads, phase failure, and long starting times. It features single-phase sensitivity and an adjustable trip current range.
Configurazione e installazione
Before beginning installation, ensure that the power supply to the circuit is disconnected and locked out to prevent accidental energization. Installation should only be performed by qualified personnel.
Montaggio
The LRD16 overload relay is designed for direct mounting onto TeSys D contactors. Ensure proper alignment of the relay's terminals with the contactor's power terminals.
Figure 1: LRD16 Overload Relay mounted on a contactor. This image shows the front view of the LRD16 relay connected to a larger contactor unit, illustrating the typical installed configuration.
Alternatively, the relay can be mounted separately using a terminal block adapter (LAD7B106, as seen on the top unit in Figure 1) or a DIN rail mounting kit, if required for specific applications.
Figura 2: In basso view of the LRD16 Overload Relay. This image highlights the base of the relay, showing the slots and holes designed for secure mounting to compatible contactors or adapters.
Cablaggio
Connect the main power circuit through the LRD16 relay's power terminals (1L1, 3L2, 5L3 for input and 2T1, 4T2, 6T3 for output, typically via the contactor). The control circuit connections (95-96 NC, 97-98 NO) are used for signaling and tripping the contactor coil.
Figura 3: in alto view of the LRD16 Overload Relay. This image displays the top terminals (1L1, 3L2, 5L3) where the incoming power lines are connected, providing a clear view per il cablaggio.
Ensure all connections are secure and tightened to the specified torque to prevent loose connections and potential hazards.
Istruzioni per l'uso
Setting the Trip Current
The LRD16 has an adjustable trip current range of 9A to 13A. Use a flat-head screwdriver to rotate the dial on the front of the relay to set the desired full-load current of the motor being protected. Set the dial to the motor's rated current.
Figure 4: Close-up of the LRD16 adjustment dial and control buttons. This image provides a detailed view of the current setting dial (ranging from 9 to 13 amps) and the blue 'RESET' and red 'STOP' buttons.
Resetting the Relay
In the event of an overload, the relay will trip, opening the control circuit and stopping the motor. To reset the relay after it has tripped, press the blue 'RESET' button on the front of the unit. Ensure the cause of the overload has been identified and resolved before resetting and restarting the motor.
Funzione di arresto
The red 'STOP' button can be used to manually trip the relay, which will open the control circuit and stop the motor. This can be used for testing or emergency shutdown purposes.
Modalità operativa
The LRD16 operates in automatic mode. Once the overload condition is cleared and the relay is reset, it is ready for operation.
Manutenzione
The LRD16 overload relay is designed for minimal maintenance. Regular inspection is recommended to ensure optimal performance and safety.
- Ispezione visiva: Controllare periodicamente il relè per verificare la presenza di eventuali segni di danni fisici, scolorimento o collegamenti allentati.
- Pulizia: Mantenere il relè libero da polvere e detriti. Utilizzare un panno asciutto e morbido per la pulizia. Non utilizzare solventi o detergenti abrasivi.
- Verifica della connessione: Assicurarsi che tutti i collegamenti dei cavi siano ben saldi e sicuri.
Risoluzione dei problemi
| Problema | Possibile causa | Soluzione |
|---|---|---|
| Relay trips frequently | Sovraccarico del motore, impostazione errata della corrente, squilibrio di fase, guasto del motore. | Verify motor load, adjust current setting to motor FLA, check motor for faults, inspect power supply for phase issues. |
| Il relè non si ripristina | Overload condition still present, relay damaged. | Ensure overload condition is resolved and allow relay to cool. If issue persists, replace relay. |
| Motor does not start after reset | Control circuit issue, contactor fault. | Check control circuit wiring and contactor operation. |
Specifiche
The following specifications apply to the Schneider Electric LRD16 Overload Relay:
Figura 5: lato view of the LRD16 Overload Relay showing the product label. This image displays detailed technical specifications, including voltage ratings, current ranges, and compliance standards.
- Numero modello: LRD16
- Dimensioni del prodotto: 3.5 x 3.25 x 1.75 pollici; 4.8 once
- Valutazione attuale: 9A to 13A (Adjustable)
- Corrente di commutazione massima: 13 Amps
- Tipo di contatto: Normally Open (NO) and Normally Closed (NC) auxiliary contacts (97-98 NO, 95-96 NC)
- Modalità operativa: Automatico
- Classe: 10
- Produttore: SCHNEIDER
- Numero di magazzino nazionale: Numero di parte 5945-01-485-5043
Garanzia e supporto
Informazioni sulla garanzia
Schneider Electric products are manufactured to high quality standards. For specific warranty terms and conditions applicable to the LRD16 Overload Relay, please refer to the official Schneider Electric warranty documentation or contact their customer support.
Assistenza clienti
For technical assistance, product inquiries, or support, please visit the official Schneider Electric websito o contattare il loro servizio clienti. Puoi trovare informazioni di contatto e risorse aggiuntive sul loro websito.
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