DRH

DRH: High-Performance DIN Rail Mounted Residual Current Devices

DRH series represents a comprehensive range of residual current devices (RCDs) designed for DIN rail mounting in electrical distribution panels. These devices provide earth leakage protection by continuously monitoring the difference between live and neutral conductors, tripping the circuit when leakage current exceeds a preset threshold. Available in 2-pole (2P) and 4-pole (4P) configurations, with rated currents from 25A to 125A and sensitivity ratings of 30mA, 100mA, 300mA, and 500mA. The DRH range includes both AC type (sinusoidal AC residual currents) and A type (pulsating DC residual currents) versions, with breaking capacities up to 10kA according to IEC/EN 61008 standards. These devices feature a compact modular design with 18mm per pole width, making them ideal for space-constrained installations.

Applications and Sectors

DRH residual current devices are primarily installed in low-voltage electrical distribution boards for residential, commercial, and industrial buildings. Common applications include protection against indirect contact in TN and TT earthing systems, fire protection in circuits with high earth leakage risks, and supplementary protection in wet areas such as bathrooms, kitchens, and outdoor installations. These devices are essential in sectors like building services, HVAC systems, lighting control panels, and industrial machinery where personnel and equipment protection against earth faults is critical. They are also widely used in renewable energy systems, particularly in photovoltaic installations where DC residual currents may occur.

Subcategories and Key Articles

The DRH category includes several subcategories based on sensitivity and pole configuration. Key article codes follow the pattern DRH-2P-40A-30mA for 2-pole 40A 30mA AC type, and DRH-4P-63A-300mA for 4-pole 63A 300mA AC type. Specific models include DRH-2P-25A-30mA, DRH-2P-40A-100mA, DRH-2P-63A-300mA, DRH-4P-25A-30mA, DRH-4P-40A-100mA, DRH-4P-63A-300mA, and DRH-4P-125A-500mA. The A type variants are coded as DRH-2P-40A-30mA-A and DRH-4P-63A-300mA-A. All devices include test button and status indicator as standard features.

Business Benefits and Support

Electric Automation Network offers the complete DRH range with up to 65% discount compared to manufacturer list prices, real-time pricing on our multilingual web portal, and express worldwide shipping from stock. Our team of specialized electrical engineers provides personalized technical support for product selection, coordination studies, and compliance with local regulations. Each product listing includes detailed technical documentation, wiring diagrams, and installation manuals. We ensure fast delivery to any destination globally, with tracking available for all shipments.