Telemecanique LRD21 Relay

Description:

The Telemecanique LRD21 thermal overload relay is a three-pole motor protection relay with an adjustable current range of 12–18 A and Class 10A tripping characteristics, designed to protect three-phase motors against overload and phase-failure conditions in industrial motor control systems. Commonly installed in motor control centers, conveyors, pumps, compressors, fans, HVAC equipment, and manufacturing machinery using TeSys D motor starters. Maintenance teams, OEMs, and system integrators use this thermal overload relay for equipment repair, replacement, retrofit, and new motor starter installations.

Applications:

The Telemecanique LRD21 thermal overload relay provides adjustable overload and phase-loss protection for three-phase motors when used with compatible TeSys D contactors. It is widely installed in manufacturing facilities, material handling systems, water treatment plants, packaging machinery, machine tools, and industrial control panels where dependable motor protection helps maximize equipment uptime and extend motor service life.

Technical Specifications:

• Manufacturer Part Number (MPN): LRD21
• Manufacturer: Telemecanique (Schneider Electric)
• Product Type: Thermal Overload Relay
• Series: TeSys D (LRD)
• Rated Voltage: 690 VAC (600 VAC UL/CSA)
• Rated Current: Adjustable 12–18 A
• Function: Motor overload and phase-failure protection
• Number of Poles: 3-Pole
• Auxiliary Contacts: 1 NO + 1 NC
• Mounting Style: Direct Contactor Mount, DIN Rail, or Panel Mount
• Terminal Type: Screw Clamp Terminal
• Compatible Systems: TeSys D LC1D18, LC1D25, LC1D32, and LC1D38 contactors
• Protection Rating: Class 10A
• Operating Temperature: -20°C to +60°C
• Replacement Type: OEM Direct Replacement

Common Replacements:

• Schneider Electric LRD21
• Telemecanique LRD21
• OEM Equivalent 12–18A Thermal Overload Relay