The Schneider LR9G225 is a high-performance electronic thermal overload relay from the TeSys Giga series, designed to provide precise and reliable protection for motors against thermal overload and phase imbalance. With a current range of 57 to 225 A and an adjustable class 5E-30E time delay, this relay ensures optimal motor performance and longevity. Its push-in control connection technology simplifies installation, making it a perfect choice for industrial applications that require efficient and secure motor protection.
Technical Specifications
Model: LR9G225
Brand: Schneider Electric
Type: Electronic Thermal Overload Relay
Current Range: 57 to 225 A
Time Delay Class: Class 5E-30E (adjustable)
Control Connection: Push-in terminals for easy and quick installation
Mounting: Designed for seamless integration with TeSys Giga contactors
Digital Display: Allows for easy monitoring and setting adjustments
Key Features
Wide Current Range (57-225 A) – Supports a broad range of motor sizes, making it suitable for various industrial applications.
Precise Motor Protection – Offers accurate monitoring and protection against thermal overload, phase imbalance, and abnormal current conditions.
Class 5E-30E Adjustable Trip Delay – Allows flexibility in response time to match different motor operating conditions and prevent unnecessary shutdowns.
Push-In Control Connection – Ensures quick and secure wiring, reducing installation time and enhancing reliability.
Integrated Digital Display – Enables real-time monitoring of motor status and easy parameter adjustments.
Durable and Reliable – Designed for harsh industrial environments, ensuring long service life and consistent performance.
Automatic and Manual Reset Options – Provides flexibility in fault recovery, reducing downtime and improving operational efficiency.
Applications
The LR9G225 electronic thermal overload relay is ideal for protecting motors in various industrial and commercial applications, including:
Industrial Motor Control – Ensures smooth and safe operation of motors in factories and production plants.
Pumps and Compressors – Protects motors in water treatment plants, chemical industries, and air compression systems.
HVAC Systems – Ideal for safeguarding motors in heating, ventilation, and air conditioning units.
Conveyor Systems – Prevents motor failures in automated material handling and logistics operations.
Cranes and Hoists – Provides thermal protection for motors used in lifting and heavy-load applications.
Automation Systems – Ensures uninterrupted operation of automated machinery by preventing overheating and motor failures.
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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