Features:
- Identifies the 5 A RXPDK 21H execution by ABB ordering number 1MRK000844-BB.
- Combines a directional delayed stage with a non-directional instantaneous stage.
- Uses the RXTUG converter to provide the relay's required +24 V DC auxiliary supply.
Ordering number 1MRK000844-BB identifies the 5 A RXPDK 21H relay execution.
It evaluates current direction for the delayed stage while retaining a separate rapid high-set overcurrent element.
Match CT secondary, polarizing circuit, relay base, RXTUG converter and test-switch arrangement before replacement.
Relay supply is checked against the 5 A execution, base and auxiliary-converter arrangement.
Verified resources for ABB RXPDK 21H 1MRK000844-BB:
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Provide directional feeder protection where fault current may flow from multiple sources.
- Add an instantaneous high-set stage for severe overcurrent conditions.
- Integrate tripping and signalling contacts into a COMBIFLEX protection panel.
- The I> stage compares operating current with a polarizing quantity.
- Operation is permitted only when the measured fault lies in the selected direction.
- The directional element supports selective protection in interconnected networks.
- The low-set I> element operates with the configured time delay.
- The high-set I>> element is non-directional and acts without intentional delay.
- Output contacts feed the external trip, alarm, or interlocking circuit.
- RXTUG provides the documented +24 V auxiliary supply to the relay.
- RTXP and RT XK test hardware protects current circuits during test and withdrawal.
- The 5 A rating must agree with the connected CT secondary.