The Siemens 7UG0841-1CC20 is a digital Earth Leakage Relay (ELR) designed to provide reliable earth fault and leakage current protection in single-phase and three-phase electrical systems. Compatible with 1-Phase 2-Wire, 3-Phase 3-Wire, and 3-Phase 4-Wire networks, this relay helps improve electrical safety and equipment protection across industrial and commercial installations.
Powered by a 230V AC auxiliary supply, the relay continuously monitors leakage currents through an external Core Balance Current Transformer (CBCT). It detects insulation failures, earth leakage faults, and abnormal current leakage conditions before they develop into serious equipment failures, electrical hazards, or fire risks.
The relay is widely used in industrial plants, manufacturing facilities, commercial buildings, utilities, data centers, motor control centers (MCCs), and power distribution panels, where continuous earth fault monitoring is essential for system reliability and personnel safety.
Its compact DIN rail-mounted design allows easy integration into new and existing switchgear systems. The Siemens 7UG series is known for accurate monitoring, dependable fault detection, and long operational life in demanding electrical environments.
• Genuine Siemens Earth Leakage Relay
• Model: 7UG0841-1CC20
• Suitable for 1Ph-2W, 3Ph-3W & 3Ph-4W systems
• 230V AC auxiliary supply voltage
• Continuous earth leakage current monitoring
• Compatible with external CBCT sensors
• Early detection of insulation and earth faults
• Enhances equipment and personnel protection
• Compact DIN rail mounting design
• Suitable for industrial and commercial applications
• Reliable operation with long service life
| Parameter | Specification |
|---|---|
| Product Series | Siemens 7UG |
| Model Number | 7UG0841-1CC20 |
| Product Type | Earth Leakage Relay (ELR) |
| Auxiliary Supply Voltage | 230V AC |
| System Compatibility | 1Ph-2W, 3Ph-3W, 3Ph-4W |
| Monitoring Function | Earth Leakage Detection |
| Sensor Requirement | External CBCT (Core Balance CT) |
| Mounting Type | DIN Rail Mount |
| Module Width | 35 mm |
| Application | Earth Fault & Leakage Protection |
| Usage | Industrial & Commercial Power Systems |
| Brand | Siemens |
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