ABB REF615A_1G HAFPAKAKNHC1BNN11G | Feeder Protection and Control Relay

I. Model Breakdown and Explanation  

Full model: REF615A_1G HAFPAKAKNHC1BNN11G  

REF615: ABB Relion 615 series medium-voltage feeder-specific protection and control IED (feeder protection relay), designed for distribution overhead or cable feeders, originally manufactured by ABB Xiamen.  

REF615A: Enhanced hardware version A (based on the standard REF615 base model, with expanded I/O capacity and upgraded computing performance).  

_1G: High-performance hardware version 1G—upgraded high-speed CPU, increased fault recording storage capacity, and enhanced EMC interference resistance.  

Different from standard low-end 1F/1E hardware versions; firmware, backplane, and plug-ins are not interchangeable with standard REF615 units.  

HAFPAKAKNHC1BNN11G (16-bit custom configuration code): ABB factory-configured fixed code, segmented as follows:  

HAF: Dedicated feeder protection logic package (standard application for line feeder protection);  

PAKAKNHC: Digital input/output matrix, trip output matrix, reclosing logic, auxiliary circuits, CT/PT input specifications, and trip circuit monitoring configuration;  

1BNN11G: Communication interface, protocol, power supply specifications, firmware version, local HMI language, and optional functions (arc protection / cable fault detection CFD, etc.).

Product Positioning and Application Scenarios  

Product name: Feeder Protection & Control Relay  

Applicable to: 10kV/20kV medium-voltage distribution substation feeders (cable and overhead lines), public substations, industrial and mining self-contained power systems, distributed photovoltaic grid-connected feeder protection;  

Compatible grids: Ungrounded neutral, arc-suppression coil grounded, resistive grounding, and directly grounded distribution networks;  

Functions: Integrated feeder fault protection, remote control of circuit breaker opening/closing, electrical quantity measurement, fault recording, remote signaling and telemetry—all in one device.

Core Protection Functions (Standard HAF Feeder Configuration)  

Current Protection: Three-stage definite-time/inverse-time overcurrent, directional overcurrent, time-delayed instantaneous protection, zero-sequence (ground fault) directional/non-directional protection, intermittent ground fault protection;  

Voltage Auxiliary: PT open-circuit monitoring, undervoltage/overvoltage, frequency abnormality protection;  

Auxiliary Functions: Three-phase single reclosing (standard in HAF), circuit breaker spring status monitoring, trip circuit supervision, CT open-circuit self-check, optional arc flash protection (AFD), cable fault detection (CFD);  

Fault Recording: Records 12 analog channels + 64 digital inputs, stores event SOE with millisecond timestamp.

Communication and Hardware Specifications  

1. Communication (Configured by 1BNN Segment)  

Standard: IEC61850 (GOOSE, MMS, 9-2LE), Modbus TCP/RTU; Optional dual-network PRP/HSR redundancy, fiber-optic Ethernet, RS485;  

Time Synchronization: IRIG-B, SNTP network time synchronization.  

2. Electrical Specifications  

CT Input: Universal 1A/5A; PT: 100V; Frequency: 50Hz;  

Operating Power: AC/DC 88–265V universal input;  

Structure: 4U plug-in withdrawable unit, front-mounted LCD touch panel, front IP54 protection rating. Dimensions: 177 (W) × 177 (H) × 155 (D) mm, net weight ≈3.5 kg.