Overview
The MRA4 is a high precision and reliable protection and control relay for feeder, grid and generator applications. The intuitive setting concept with plausibility test enables reliable and time optimized configuration of the extensive protection function to a variety of applications such as incoming or outgoing feeder protection, network protection and generator protection. The implemented switchgear management guaranties an efficient and safe control and supervision. The device is a bench mark in flexibility and usability and offers various communication options. The hardware is designed for all nominal values in combination with protection and control functionality. The parameterizing and analyzing software Smart view SE is usable for each High-PROTEC device and free of charge. The MRA4 is available in 384 variants, that cover all combinations of properties that you might need or not need for your application. Each variant is uniquely specified by a typecode of form MRA4-2xxxxx (i.e. 5 digits/letters following the ‘-2’). Check the Order Form (depicted below, or in the brochure DOK-FLY-MRA4-2E or in the user manual MRA4-3.6-EN-MAN) for a complete overview.
Features
- Comprehensive protection package
- THD protection power quality
- Demand Management/ peak values
- Interconnection Package
- Sliding-mean-square Supervision
- Recorders
- Logic equations for protection
- Time Synchronisation
- Commissioning Support
- Communication Options
- IT Security
- Control
- PC Tools
Details
Current Inputs | 4 (1 A and 5 A) with automatic CT Disconnect |
---|---|
Voltage Inputs | 4 (0 … 800 V) |
Digital Inputs | Switching thresholds adjustable via software |
Power Supply | 24 VDC – 270 VDC / 48 VAC – 230 VAC (−20/+10%) |
Terminals | All terminals plug type |
Type of enclosure | IP54 |
Dimensions of housing (W x H x D) | 19“ Flush Mounting: |
Weight (max. components) | approx. 4.7 kg / 10.36 lb |
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