Description
Model Suffix Decoder
The alphanumeric model string REF610C11HCHN designates a specific physical configuration variant from the factory:
- REF610: Base Feeder Protection Relay Platform
- C: Non-directional overcurrent and earth-fault protection core with disturbance recorder functionality
- 1: Standard phase current inputs ($1\text{ A} / 5\text{ A}$ hardware selectable)
- 1: Standard ground/earth-fault current input ($1\text{ A} / 5\text{ A}$ hardware selectable)
- H: High-voltage auxiliary power supply option ($110\text{–}240\text{ VAC/VDC}$ nominal operating range)
- CH: Communication port option supporting Modbus RTU, SPA-bus, or IEC 60870-5-103 protocols via rear serial bus terminal links
- N: Standard mechanical packaging / execution configuration (latest revision platform baseline)
Product Introduction
The ABB REF610C11HCHN is a specialized numerical feeder protection relay designed to implement non-directional overcurrent and earth-fault protection schemes in medium-voltage power distribution networks, industrial grids, and power generation units. This specific variant features an integrated high-voltage universal power module ($110\text{–}240\text{ VAC/VDC}$), making it ideal for standard substation control rooms running off centralized DC battery banks. It operates as an independent Intelligent Electronic Device (IED) to prevent severe thermal stress, line short-circuits, and phase imbalances along radial power networks.
Constructed using a modular, draw-out design frame, the internal card carrier can be quickly unlatched and removed from its outer block case without disrupting the hard-wired screw terminals on the rear of the panel. The processing engine performs true RMS calculations on sampled multi-phase currents, ensuring robust immunity against nuisance tripping caused by high-order transient harmonics or transformer inrush conditions. Via the integrated rear communication terminal port configured by the “CH” suffix specification, this relay functions as a telemetry node, allowing real-time current measurements, sequence records, and event logs to be retrieved remotely by automated SCADA master control networks.
