ABB REF543KB127AAAA Relay protection device

ABB REF543KB127AAAA Relay protection device

Specific Parameters

Electrical Parameters

Power Supply Voltage: 24V DC/110V DC/220V DC (wide-voltage adaptation, ±20% fluctuation), typical power consumption 8W, maximum power consumption 12WProtection Functions:

• Overcurrent Protection: Setting range 0.1-100In (In is rated current, supporting inverse time/definite time), error ±5%
• Earth Fault Protection: Setting range 0.05-50In, error ±5%, supporting selective tripping
• Overload Protection: Setting range 0.5-1.5In, operating time 1-3600s adjustable
• Non-electrical Quantity Protection: 2 channels of passive contact input (adapting to temperature, pressure sensors)Current Input: 3 channels of phase current (0.1-10In), 1 channel of zero-sequence current (0.05-5In), accuracy class 0.2Communication Interfaces: 1 10/100Base-TX Ethernet port (supporting IEC 61850 MMS/GOOSE), 1 RS-485 port (supporting Modbus RTU)Output Signals: 4 channels of relay output (250V AC/30V DC, 5A), 2 channels of analog output (4-20mA, accuracy class 0.5)Fault Recording: Supports 100 fault records, recording duration 1s (0.2s before fault + 0.8s after fault)Diagnostic Functions: Built-in detection for power fault, current circuit disconnection and communication abnormality; fault information output via LEDs and communication interfaces

Environmental Parameters

Operating Temperature: -40℃ to +70℃ (non-condensing environment, compliant with IEC 60068-2-1/2 standard)Storage Temperature: -40℃ to +85℃Relative Humidity: 5% to 95% (non-condensing, compliant with IEC 60068-2-3 standard)Protection Rating: IP40 (device itself, supporting cabinet internal/front panel mounting)EMC Compliance: Complies with IEC 61000-6-2 (industrial environment immunity) and IEC 61000-6-4 (emission limits) standards, common-mode interference immunity ≥120dBVibration Resistance: 10-500Hz frequency range, 0.5g acceleration (sine wave), 30 minutes of continuous testing per axis

Mechanical Parameters

Overall Dimensions: 140mm (L) × 180mm (W) × 100mm (H)Housing Material: Flame-retardant engineering plastic (UL94 V-0 grade), anti-static coating on surface, with RFI shielding functionWeight: Approximately 1.2kgMounting Method: 35mm standard DIN rail mounting or panel embedded mounting (adapting to standard distribution cabinet doors)Wiring Method: Plug-in terminal blocks (power, current, signal), supporting wire diameter 0.5-4mm², terminals with anti-misplug latchesStatus Indication: 1 system operation LED (green), 1 fault alarm LED (red), 4 protection function action LEDs (yellow)

Product Performance

High protection accuracy: The setting error of overcurrent and earth fault protection is controlled within ±5%, and the current measurement accuracy reaches class 0.2, which can accurately identify minor faults in the distribution network and avoid misoperation or refusal to operate.

Fast response speed: The short-circuit fault tripping time is ≤50ms, and the earth fault tripping time is ≤80ms, which can quickly cut off the fault circuit, reduce the risk of fault expansion and protect the safety of distribution equipment.

Wide communication compatibility: Supports IEC 61850 GOOSE fast messages (transmission delay ≤3ms) and Modbus RTU protocol, which can be seamlessly connected to distribution automation systems from different manufacturers to realize real-time upload of protection data and remote control.

Strong configuration flexibility: ABB PCM600 engineering software enables custom protection logic (e.g., overcurrent time curve, tripping output configuration) and supports 3 groups of protection setting switching, adapting to different protection scenarios such as lines, transformers and motors.

Excellent operational reliability: The wide temperature design of -40℃ to +70℃ covers extreme climate regions; IP40 protection rating can resist dust intrusion; anti-electromagnetic interference design ensures stable operation in high-voltage distribution environments; mean time between failures (MTBF) ≥100,000 hours.