ABB RET615E Transformer Protection Relay

Configured for main protection, control, and supervision in two-winding power transformer networks, the ABB RET615E (RET615 Transformer Protection Relay) provides direct physical/electrical execution.

Hardware Specifications

Backplane Bus Communication Velocity and Firmware Compatibility

• The relay transfers sampled values and GOOSE messaging across Profinet / EtherNet/IP deterministic networks, leveraging High-availability Seamless Redundancy (HSR) and Parallel Redundancy Protocol (PRP) architectures for zero-loss fault recovery. Sub-microsecond time stamping is maintained across all process channels via IEEE 1588 V2 PTP synchronization.
• Firmware flash compatibility across the Relion 615 platform supports ready-made standard vector group configurations and dynamic I/O density scaling. Analog current and voltage signals execute differential protection algorithms deterministically without incurring bus communication latencies.

Frequently Asked Questions

Q: How does the withdrawable chassis design maintain CT circuit integrity during relay extraction?

A: The withdrawable plug-in chassis features automatic internal short-circuiting mechanisms that bridge current transformer secondary leads prior to the module fully disconnecting from the case.

Q: What redundancy protocols are supported on the ethernet network ports for substation communication?

A: The relay natively supports both High-availability Seamless Redundancy (HSR) and Parallel Redundancy Protocol (PRP) on its ethernet channels for bumpless network communication.

Field Installation Guidelines

• Verify that external current transformer (CT) shorting blocks are closed and potential transformer (PT) fuses are removed before installing or removing the withdrawable unit.
• Secure the outer housing into the switchgear panel cutout using factory mounting clamps to establish a firm earth ground connection through the metal chassis.
• Route low-level analog, RTD, and trip signal leads in twisted shielded pairs, terminating shields at a single panel ground point.
• Install ethernet communication wiring in dedicated wire channels, maintaining proper separation from high-voltage AC and DC tripping circuits.