• ABB 1MRK001987-AA
  • ABB 1MRK001987-AA
  • ABB 1MRK001987-AA
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ABB 1MRK001987-AA Compact Current Relay

ABB 1MRK001987-AA Compact Current Relay

The ABB 1MRK001987-AA is a compact current relay designed for precise monitoring and protection applications. This device features a 3-phase current transformer (CT) input, providing robust performance in industrial power...

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Availability: Low stock: 10 left

SKU: 1MRK001987-AA
Vendor: ABB
Category: Current Relay
Related Series:

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The ABB 1MRK001987-AA is a compact current relay designed for precise monitoring and protection applications. This device features a 3-phase current transformer (CT) input, providing robust performance in industrial power management systems.

Features

  • 3-phase CT input configuration.
  • Wide measurement range from 0.05 to 40 times the nominal current (In).
  • High measurement accuracy of ±1% of reading ±0.5% In.
  • Versatile power supply compatibility supporting 24 to 240 V AC/DC.
  • Harmonic analysis capability up to the 15th harmonic.
  • Low power burden for efficient operation.

Technical Specifications

Model 1MRK001987-AA
Rated Current (In) 1 A or 5 A
Measurement Range 0.05 – 40 x In
Accuracy ±1% of reading ±0.5% In
Frequency 50 / 60 Hz ±5%
Rated Voltage 24 – 240 V AC/DC
Power Burden (Current) < 0.1 VA @ In
Power Burden (Voltage) 3 W (stand-by)
In-rush Current < 10 W for 100 ms

Installation Guidelines

  • Ensure the device is powered down before performing any wiring or installation tasks.
  • Verify that the CT input wiring is securely terminated and matches the phase configuration of the monitored circuit.
  • Maintain proper grounding practices to minimize electromagnetic interference (EMI) in high-voltage environments.
  • Ensure adequate ventilation around the unit to prevent thermal buildup during operation.
  • Handle with care to prevent electrostatic discharge (ESD) damage to internal components.

FAQ

What is the primary function of the 1MRK001987-AA?
This module serves as a compact current relay designed to monitor 3-phase current inputs for protection and control purposes in electrical systems.

Does this relay support both 50 Hz and 60 Hz systems?
Yes, the unit is designed to operate within a frequency range of 50/60 Hz ±5%.

What is the rated voltage range for the power supply?
The relay accepts a wide input voltage range of 24 to 240 V AC/DC.