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Schneider Electric LT6 TeSys Electronic Overload Relay
Model: LT6K08BF7
4-hour response · Pricing in SAR · Delivery across all KSA regions
LT6K08BF7 — Schneider Electric LT6 TeSys Electronic Overload Relay
The Schneider Electric LT6 TeSys LT is an electronic overload relay covering 3 A to 24 A for precision motor protection in applications where the bimetallic technology of the LRD relay is insufficient for the motor protection accuracy or diagnostic capability required. The LT6 uses current transformer sensing rather than bimetallic elements, providing protection accuracy of ±3% of set current — approximately three times more accurate than bimetallic designs — and immune to ambient temperature variations without requiring a compensation mechanism. This precision makes the LT6 ideal for motors with tight overload protection tolerance requirements such as precision cooling pump motors for electronics manufacturing and process analytical equipment in Saudi petrochemical and pharmaceutical facilities.
The LT6 incorporates a ground fault detection function that monitors zero-sequence current, detecting insulation breakdown faults and earth leakage before the fault current reaches short-circuit levels — providing early warning of motor insulation deterioration in applications where motor replacement is expensive or difficult. The built-in phase imbalance and phase loss detection provides comprehensive three-phase supply quality monitoring at the motor starter level. A Modbus RTU communication option transforms the LT6 into a communicating motor protection relay, reporting current, thermal state, fault history, and motor operating hours to SCADA and maintenance management systems without a separate current monitoring device.
The LT6 Saudi Arabia application focus is on critical process motors where enhanced diagnostics justify the premium over the standard LRD thermal relay. Pharmaceutical manufacturing process pump motors, petrochemical reactor agitator motors at SABIC and ARAMCO facilities, food-grade stainless pump motors at MODON food zone factories, and critical building services pump motors at hospitals and data centres all represent LT6 applications where the improved protection accuracy, ground fault detection, and optional Modbus communication provide tangible operational value.
Razz Middle East stocks LT6 relays with and without Modbus communication option for delivery to critical motor applications across Saudi Arabia, with technical support for Modbus integration and motor protection relay coordination studies.
Technical Specifications
Full specifications for the LT6K08BF7
- Current Range
- 3–24 A
- Sensing
- Current transformer (CT-based)
- Protection Accuracy
- ±3% of set current
- Ground Fault
- Zero-sequence current detection
- Phase Protection
- Imbalance + phase loss
- Communication
- Modbus RTU option
- Ambient Compensation
- Not required (CT-based)
- Reset
- Manual or auto selectable
- Standard
- IEC 60947-4-1
Key Features & Benefits
- CT-based current sensing provides ±3% protection accuracy versus ±15% typical for bimetallic relays, enabling tight overload trip settings for motors with narrow allowable overload margins in precision process applications.
- Ground fault detection via zero-sequence current monitoring identifies insulation breakdown before fault current reaches short-circuit levels, providing early warning that saves motor rewind cost in critical applications.
- Immunity to ambient temperature variation eliminates the temperature-related trip threshold shift that affects bimetallic relays, providing consistent protection accuracy from 0°C winter to 60°C summer Saudi plant rooms.
- Modbus RTU communication option provides remote access to motor current, thermal state percentage, phase currents, fault history, and motor run hours — transforming the LT6 into a smart motor condition monitoring device.
- Phase imbalance detection at 15% current unbalance threshold identifies supply quality problems early, before the motor thermal model reaches trip threshold and production is interrupted.
- Electronic motor thermal model retains heat accumulation data through power cycling, preventing rapid restart overtemperature damage when a process plant restores power after a brief supply interruption.
- Alarm contact output triggers before the trip contact opens, providing advance warning to SCADA systems that enables planned maintenance action before unexpected motor shutdown impacts production.
Industrial Applications in Saudi Arabia
- Critical process pump motor protection at SABIC specialty chemical facilities in Jubail, where CT-based accuracy and Modbus reporting satisfy condition-based maintenance programme data requirements.
- Pharmaceutical manufacturing pump and mixer motor protection at healthcare product facilities in Riyadh and Jeddah, where ground fault detection monitors motor insulation integrity in hygienic washdown environments.
- Hospital critical HVAC pump motor protection at Ministry of Health facilities, where motor run hour reporting via Modbus enables service scheduling aligned with maintenance management system work orders.
- Data centre precision cooling system pump motor protection in Riyadh hyperscale facilities, where CT accuracy and thermal state monitoring provide advance warning of motor performance degradation.
- Food processing line critical pump and mixer motor protection at MODON food zone factories, where stainless steel motor insulation is stressed by frequent temperature cycling and cleaning chemical exposure.
- ARAMCO process facility remote pump station motor protection where Modbus communication provides live motor health data to the operations control room without additional instrumentation wiring.
- University and research laboratory precision pump motor protection where accurate overload protection and Modbus data logging support research equipment maintenance records and audit requirements.
Industrial Supplier in Saudi Arabia
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