The Schneider LR9G115 is an advanced electronic thermal overload relay from the TeSys Giga series, designed to provide precise and reliable protection for motors and electrical circuits against thermal overloads. With a current range of 28 to 115 A and a class 5E-30E time delay, this electronic relay offers enhanced flexibility and accuracy in motor protection. The LR9G115 is built to ensure the efficient operation of industrial and commercial motor control systems, offering push-in control connections for easy installation.
Technical Specifications
Here are the key technical specifications for the LR9G115 electronic thermal overload relay:
Model: LR9G115
Brand: Schneider Electric
Type: Electronic Thermal Overload Relay
Current Range: 28 to 115 A
Time Delay Class: Class 5E-30E
Control Connection: Push-in connection for ease of installation
Mounting: Designed for easy integration with TeSys Giga contactors
Voltage Rating: Suitable for 3-phase AC motors
Adjustment: Adjustable settings to match the specific motor protection requirements
Features: Includes a digital display for easy setting and monitoring of protection parameters
Key Features
The Schneider LR9G115 electronic thermal overload relay is equipped with several key features that make it a standout choice for motor protection:
Precise Protection – Provides accurate protection against thermal overload by continuously monitoring the motor’s current and temperature.
Wide Current Range – With a range of 28 to 115 A, it is suitable for a variety of motor sizes and industrial applications.
Class 5E-30E Time Delay – The relay features an adjustable time delay class, providing flexibility for different operational conditions and ensuring reliable motor protection.
Push-In Control Connection – Allows for quick and secure installation with push-in technology, simplifying wiring and reducing installation time.
Digital Display – The built-in digital display makes it easy to monitor settings and adjust the relay according to specific protection needs.
Durability and Reliability – Designed to withstand demanding industrial environments, ensuring long-lasting protection even under harsh conditions.
Enhanced Safety – Prevents motor overheating and potential damage caused by overcurrent conditions, reducing the risk of equipment failure and downtime.
Applications
The LR9G115 electronic thermal overload relay is ideal for protecting motors and electrical equipment in a wide range of industrial and commercial applications:
Motor Protection – Provides thermal overload protection for motors, ensuring reliable operation and preventing damage from sustained overcurrent conditions.
Industrial Machinery – Used in various industrial machines and systems to safeguard motors and prevent downtime caused by overloads.
Pumps and Compressors – Protects motors in pumps and compressors, ensuring the safe and efficient operation of these critical systems.
HVAC Systems – Ideal for use in heating, ventilation, and air conditioning systems, offering protection for motors in these energy-intensive applications.
Conveyor Systems – Ensures the protection of motors in conveyor systems, preventing failure and minimizing maintenance costs.
Automation Systems – Applied in automated industrial systems, offering motor protection to ensure continuous and smooth operation of machinery.
Ground fault protection – tripping time adjustment: 0…1 s – for alarm circuit conforming to IEC 60947-4-1 Ground fault protection – tripping time adjustment: 0…1 s – for alarm circuit conforming to UL 60947-4-1 Phase loss – tripping time adjustment: 0…4 s – for alarm circuit Phase imbalance – tripping time adjustment: 0…5 s – for alarm circuit conforming to IEC 60947-4-1 Phase imbalance – tripping time adjustment: 0…5 s – for alarm circuit conforming to UL 60947-4-1
Local signalling
LED Trip indicator
Contacts type and composition
1 NO + 1 NC
[Ith] conventional free air thermal current
5 A
[Uc] control circuit voltage
24…500 V AC 50/60 Hz 24…250 V DC
[Ue] rated operational voltage
1000 V AC 50/60 Hz
[Uimp] rated impulse withstand voltage
8 kV
Reset
Automatic reset Manual
Mechanical durability
7000 cycles
Surge withstand
4 kV
Electromagnetic compatibility
EMC immunity conforming to IEC 60947-4-1 Emission tests criteria A conforming to IEC 60947-4-1 Immunity to radiated radio-electrical interference – test level: 20 V/m conforming to EN/IEC 61000-4-3 Voltage dips and interruptions immunity test conforming to SEMI F47
Connections – terminals
Power circuit: bar – busbar cross section: 25 x 6 mm Power circuit: lugs-ring terminals 1 185 mm² Control circuit: push-in 1 0.2…2.5 mm² – cable stiffness: solid stranded without cable end Control circuit: push-in 1 0.25…2.5 mm² – cable stiffness: flexible with cable end Control circuit: push-in 2 0.5…1.0 mm² with cable end
Tightening torque
18 N.m
Mounting support
Direct on contactor Plate
Standards
EN/IEC 60947-4-1 EN/IEC 60947-5-1 UL 60947-4-1 CSA C22.2 No 60947-4-1 JIS C8201-4-1 JIS C8201-5-1 IEC 60335-1:Clause 30.2 IEC 60335-2-40:Annex JJ UL 60335-2-40:Annex JJ UL 60335-1
Product certifications
CB Scheme CCC cULus UKCA ATEX EU-RO-MR by DNV-GL EAC
Environment
IP degree of protection
IP2X front face with shrouds conforming to IEC 60529 IP2X front face with shrouds conforming to VDE 0106
Protective treatment
TH
Ambient air temperature for operation
-25…60 °C
Ambient air temperature for storage
-60…80 °C
Permissible ambient air temperature around the device
-40…60 °C at Uc
Adjustment of dial setting
-25…60 °C
Mechanical robustness
Vibrations 5…300 Hz 6 gn contactor open Shocks 15 gn 11 ms contactor closed
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