Overview
Specification
| Category | Specification |
|---|---|
| Manufacturer | ABB |
| Model | 1MRK000284-ABr03 |
| Module Type | Overcurrent Directional Time Relay Module |
| Function Class | Protection & Control |
| Application | Medium- and High-voltage feeder and grid protection |
| Rated Supply Voltage | 24–250 V AC/DC |
| Power Consumption | <10 W typical |
| Frequency Range | 50 / 60 Hz |
| Insulation Category | IEC/EN 60255 compliant |
| Dielectric Strength | 2 kV AC, 1 minute |
| Measurement Inputs | 3-phase CT inputs (1 A / 5 A selectable) |
| Input Burden | <0.5 VA |
| Measurement Method | True RMS with digital filtering |
| Directional Measurement | Four-quadrant directional detection |
| Overcurrent Protection | I>, I>> instantaneous and delayed |
| Time-delay Functions | Definite and inverse time curves |
| Selectable Time Curves | IEC NI / VI / EI, ANSI curves, custom curves |
| Directional OC Protection | Forward / Reverse selectable |
| Trip Outputs | 1–2 configurable relay contacts |
| Reset Mode | Manual or automatic reset |
| Event Recording | Time-stamped pickup and trip logs |
| Configuration | Panel interface or relay configuration tool |
| Status Indication | LEDs for pickup, trip, direction |
| Communication Interface | Dry-contact I/O (relay-platform dependent) |
| Operating Temperature | –25°C to +70°C |
| Storage Temperature | –40°C to +85°C |
| Humidity Rating | 5–95% non-condensing |
| EMC Compliance | IEC/EN 60255-26, IEC/EN 60255-27 |
| Vibration Resistance | IEC 60068-2-6 |
| Shock Resistance | IEC 60068-2-27 |
| Enclosure Protection | IP20 (front) |
| Installation Method | DIN-rail or panel-mounted |
| Dimensions | ABB relay module format (compact) |
| Weight | 0.3–0.5 kg typical |
| MTBF | >100,000 hours |
| Self-Diagnostics | Continuous internal monitoring |
| Certifications | CE / IEC / EN approved |
FAQ
A1: It provides overcurrent and directional time-delay protection to improve safety and selectivity in power distribution systems.
Q2: Can this module integrate with existing ABB protection relays?
A2: Yes, it integrates seamlessly with ABB relay families, which simplifies configuration and system upgrades.
Q3: Is the module suitable for high-voltage environments?
A3: Yes, it supports medium- and high-voltage applications commonly found in substations and industrial grids.
Q4: How does directional logic benefit my system?
A4: Directional measurement helps identify the fault direction, therefore reducing false trips and improving coordination across feeders.
Q5: Does the module require frequent maintenance?
A5: No, its robust design reduces service needs and supports long operational life.
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