Product Core Brief
- Model: RET620 (Part Number: RET620-5BTNAAAANHC8BNA11G)
- Brand: ABB
- Series: Relion 620 Series
- Core Function: Provides comprehensive transformer differential protection, automatic voltage regulation (AVR), and control for two-winding power transformers in utility and industrial substations.
- Type: Transformer Protection and Control Relay
- Key Specs: Ver 5.0 Core Platform, 48–250 V DC / 100–240 V AC auxiliary voltage, high-density binary I/O layout, native IEC 61850 Edition 2 support.
- Condition: New Original (New Surplus) — not refurbished.
Product Introduction
In search of an advanced, high-density solution for two-winding power transformer management? The ABB RET620-5BTNAAAANHC8BNA11G functions as a dedicated numerical terminal within the Relion 620 family, safeguarding utility and industrial substation transformers against internal winding faults, asymmetrical loads, and thermal stress. This mid-sized 1/2-rack unit flush-mounts into your control bay or switchgear panel door, connecting directly to current and voltage transformer secondaries.
Deploying this specific controller stabilizes grid integrations during massive through-fault surges by using an ultra-precise dual-slope stabilized differential function that restrains false trips in less than 20 ms. To be frank, selecting this Version 5.0 hardware platform gives your station a massive physical I/O footprint alongside advanced on-load tap changer (OLTC) control matrix options. That engineering choice completely eliminates standalone voltage regulation panels, reducing project commissioning timelines by up to 35%.
