Hardware Split Structure
The entire machine is divided into two parts: the cabinet door HMI operation panel and the rear host base. They can be installed separately:
Front operation panel
Color LCD display, one-time main wiring diagram display, multi-language Chinese interface;
Local closing and opening toggle buttons, red and green opening and closing keys, navigation function keys;
Status lights: Ready, fault, alarm, interlock, M1/M2/M3 protection action indicator lights;
Infrared IrDA debugging port, local offline programming of set values for the host base.
Host base (1VCF750090R0802 body)
Built-in dual independent DSP: one for protection calculation, one for measurement and control logic;
Integrated power supply, CT/PT analog acquisition circuit, DI/DO switch quantity, communication bus;
Backward DB9 serial port, RJ45 network port, CAN bus, 24V power supply terminal block.
Complete Protection Functions (Standard for feeder, can be authorized for expansion)
1. Basic feeder current protection
Three-stage overcurrent (instantaneous / time-limited / reverse-time 50/51), two-stage directional overcurrent 67;
Two-stage zero-sequence grounding faults, sensitive zero-sequence grounding, directional grounding protection 67N/67S;
Overload protection, motor locked rotor, start timeout, excitation surge current locking;
2. Voltage / Frequency Protection
Overvoltage, undervoltage, zero-sequence overvoltage, low frequency, high frequency, slip loss synchronization protection;
3. Authorized Expansion Function (Supported by V2 version)
Transformer differential, motor differential, multi-stage distance protection, sectional standby auto-transfer BFT, automatic reclosing (up to 4 times);
4. Switchgear Circuit Monitoring
CT disconnection, PT disconnection, tripping circuit disconnection, circuit breaker spring energy monitoring, cabinet door interlock, SOE event sequence recording (1ms resolution) eero.
Measurement and IO Hardware Specifications
1. Analog Quantity Acquisition
CT secondary: 1A/5A universal; PT secondary 100V phase voltage;
Measurement accuracy: current/voltage 0.5 class, active/reactive power 1 class, energy 2 class;
Can be expanded with 4~20mA module to collect temperature, liquid level, pressure transducer signals eero.
2. Switch Quantity DI/DO
Standard multi-channel passive input (valve position, fault contact), relay output (trip, alarm, motor storage), supports external BIO expansion IO module.
3. Electrical Power Supply
Working power supply: AC/DC 110/220V universal, total machine power consumption ≤ 12W;
Wide temperature range: -25℃ ~ +70℃, cabinet internal IP20 protection, complies with the complete IEC61000 industrial EMC anti-interference standards.
Multi-protocol Communication Interfaces (R0802 V2 version configuration)
Ethernet RJ45: Modbus TCP, IEC61850 MMS/GOOSE;
RS485 serial port: Modbus RTU, IEC 60870-5-103;
ABB proprietary bus: SPA, LON optical fiber bus (long-distance anti-interference scenarios);
CAN bus: local expansion IO, interval linkage logic;
Infrared local debugging port, computer infrared adapter direct connection for program downloading eero.
Compatibility Comparison of R0802 / R0803 / R0804 Versions Table
Hardware Model Version Position Core Differences Replacement Compatibility
1VCF750090R0802 (V2) Basic Single Network Port Standard Version One Ethernet port, basic storage, basic recording duration Physical size and terminals are fully compatible; V3/V4 can directly replace V2; replacing V2 with V3 will lose dual network ports and long recording function
1VCF750090R0803 (V3) Dual Network Port Intelligent Station Version Dual redundant Ethernet, expanded storage, complete GOOSE interlock Downward compatible with V2 program
1VCF750090R0804 (V4) High-End Long Recording Version Large-capacity fault recording, multiple parallel GOOSE links All downward compatible
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