Product Short Description
Product Introduction
The ABB SPAJ 140C is a microprocessor‑based, integrated numerical protection relay designed for selective short‑circuit and earth‑fault protection of radial feeders in solidly‑earthed, resistance‑earthed, or impedance‑earthed power systemsABB. It combines a three‑phase overcurrent unit and a non‑directional earth‑fault unit with flexible tripping and signaling capabilities, and includes a built‑in circuit‑breaker failure protection functionABB. This relay provides comprehensive protection for power distribution networks, industrial facilities, and utility substations, ensuring fast, accurate fault detection and isolation to minimize equipment damage and system downtime. It supports both self‑powered operation from current transformers (CTs) and auxiliary power supply, and features a user‑friendly interface with local display and remote communication capabilities.
Description
Technical Specifications
Core Physical & Mechanical Specifications
- Product Type: Numerical Combined Overcurrent and Earth‑Fault Protection Relay
- Mounting: Flush panel mounting (96 mm × 96 mm cutout)
- Dimensions (W × H × D): 96 mm × 96 mm × 160 mm
- Net Weight: 1.2 kg
- Protection Class: IP40 (front panel) for switchgear installation
- Environmental Ratings:
- Operating Temperature: -25°C to +55°C
- Storage Temperature: -40°C to +85°C
- Humidity: 5% – 95% RH, non‑condensing
- Certifications: IEC 60255, IEC 61000‑4 (EMC), CE, UL recognized
Electrical & Power Specifications
| Parameter | Value |
|---|---|
| Auxiliary Power Supply | 24–250 V DC / 24–250 V AC (auto‑ranging) |
| Self‑Powered Operation | From current transformers (CTs), no external power required |
| CT Input Ratings | 1 A or 5 A (field‑selectable) |
| Overcurrent Protection Range | 0.1–20 × In (In = CT rated current) |
| Earth‑Fault Protection Range | 0.02–5 × In |
| Time‑Current Characteristics | 4 standard IDMT curves (IEC/BS), 2 specific curves (RI, RXIDG) |
| Trip Time Accuracy | ±5% of set value |
| Output Relays: 2 heavy‑duty (trip), 4 light‑duty (signal) | Configurable via relay matrix |
| Communication Interface: Serial port (RS‑232/RS‑485) | For remote parameterization and data retrieval |
| Display: 4‑digit numerical LCD | Shows measured values, settings, fault codes |
| Fault Memory: Stores last 10 fault events | With current, time, and type data |
Protection Functions
- Three‑Phase Low‑Set Overcurrent: Definite time or IDMT characteristicsABB
- Three‑Phase High‑Set Overcurrent: Instantaneous or definite time operationABB
- Low‑Set Earth‑Fault: Definite time or IDMT characteristicsABB
- High‑Set Earth‑Fault: Instantaneous or definite time operationABB
- Circuit‑Breaker Failure Protection: Built‑in backup protectionABB
- Self‑Supervision: Continuous hardware/software monitoring with auto‑diagnosisABB
Key Features
Integrated Protection Solution
- Combined Functionality: Merges overcurrent and earth‑fault protection in one unit, reducing panel space and wiring complexity.
- Selective Coordination: Supports graded protection schemes for radial distribution networks, ensuring fault isolation without widespread outagesABB.
- Breaker Failure Protection: Eliminates need for separate backup relays, enhancing system reliabilityABB.
Flexible Operation & Configuration
- Dual Power Options: Operates from CT self‑power or auxiliary supply, adapting to various installation scenarios.
- Multiple Time Curves: Offers 6 selectable time‑current characteristics for precise protection tuning.
- Configurable Outputs: 6 output relays with matrix routing for custom tripping and signaling.
- Local/Remote Control: Front‑panel interface and serial port for parameter setting and data access.
High Reliability & Performance
- Microprocessor Technology: Delivers fast, accurate fault detection with high precision.
- Self‑Supervision System: Continuously monitors internal circuits and provides fault diagnosticsABB.
- EMC Immunity: Complies with strict IEC 61000‑4 standards for operation in harsh electrical environments.
- Long Service Life: Industrial‑grade components ensure stable performance in demanding conditions.
User‑Friendly Design
- Numerical Display: Provides clear readout of measured values, settings, and fault information.
- Easy Parameterization: Front‑panel controls or remote software for quick configuration.
- Fault Event Logging: Stores historical fault data for analysis and system optimization.
- Compact Form Factor: Standard 96×96 mm panel size for easy integration into switchgear.
Application Scenarios
Power Distribution & Substations
- Radial Feeder Protection: Primary protection for medium‑voltage distribution feeders in utility substationsABB.
- Transformer Backup Protection: Provides overcurrent and earth‑fault backup for power transformers.
- Switchgear Protection: Safeguards medium‑voltage switchgear assemblies against short‑circuits and ground faults.
- Distribution Network Automation: Integrates with SCADA systems for remote monitoring and control.
Industrial Facilities
- Manufacturing Plants: Protects motors, drives, and distribution panels in automotive, electronics, and machinery factories.
- Chemical & Petrochemical Facilities: Ensures safe operation of electrical systems in hazardous industrial environments.
- Mining Operations: Safeguards underground and surface mining equipment from electrical faults.
- Water & Wastewater Treatment: Protects pump motors, control panels, and distribution systems in treatment plants.
Power Generation
- Power Plant Auxiliaries: Protects auxiliary motors, transformers, and distribution systems in thermal, hydro, and renewable power plants.
- Renewable Energy Installations: Safeguards wind turbine and solar farm electrical systems from overcurrent and earth faults.
Oil & Gas Industry
- Pipeline Pumping Stations: Protects high‑power pump motors and control systems in long‑distance pipelines.
- Offshore Platforms: Ensures reliable protection for electrical equipment in harsh marine environments.
- Refinery & Processing Plants: Safeguards critical process equipment and distribution networks.
Commercial & Infrastructure
- Large Buildings & Complexes: Protects HVAC systems, elevators, and electrical distribution in commercial buildings.
- Transportation Hubs: Safeguards electrical systems in airports, seaports, and railway facilities.
- Data Centers: Provides reliable protection for critical power distribution and backup systems.
Reviews
There are no reviews yet.