ABB 1MRK002305-AAr01 Time Synchronization Module

Configured for precise sub-microsecond time stamping and system-wide clock alignment in ABB Relion 670 series Intelligent Electronic Devices (IEDs), the ABB 1MRK002305-AAr01 (1MRK002305-AAr01 Time Synchronization Module) provides direct physical/electrical execution.

Hardware Specifications

Substation Time Synchronization and Phasor Measurement Execution

Protection relays and Synchrophasor / Phasor Measurement Units (PMUs) require microsecond-level time synchronization across widespread transmission grids to enable synchronized fault recording and power system vector analysis. The 1MRK002305-AAr01 receives external IRIG-B time signals from master GPS clocks and converts them into internal 1PPS and 10 MHz timing pulses with an accuracy of up to ±100 ns. This ultra-precise clocking allows Relion 670 IEDs to accurately timestamp sequence-of-events (SOE) logs and sync sampled values across wide-area protection networks.

Frequently Asked Questions

Q: What IRIG-B signal formats are supported by the 1MRK002305-AAr01 module?

A: The module supports standard BCD-encoded IRIG-B signals, including formats 001, 002, and 100, delivered via BNC coaxial or optical fiber inputs depending on the chassis terminal layout.

Q: Can this module distribute time synchronization to other internal cards within the same Relion 670 chassis?

A: Yes. Once the 1MRK002305-AAr01 locks onto an external IRIG-B source, it drives high-precision timing signals across the backplane bus to synchronize binary input timestamping and analog sampling hardware across all installed cards.

Field Installation Guidelines

• Isolate auxiliary station supply power and external tripping loops prior to inserting or servicing cards inside the Relion 670 sub-rack.

• Put on a grounded Electrostatic Discharge (ESD) wrist strap before removing the module from its anti-static shielding bag.

• Insert the module into its assigned card slot on the rear of the Relion 670 IED chassis, pushing firmly along the side guides until fully connected.

• Tighten the upper and lower front-panel retaining screws to 0.6 Nm to ensure secure mechanical grounding and EMC shielding integrity.

• Attach the incoming IRIG-B cable from the master clock to the module input connector, verifying signal polarity and signal strength before powering on the IED.