# DEIF GPU-3 Generator & Interconnection Protection Unit

> bay-control - Generator protection, power plant bay control, reverse power, synchrocheck, frequency/voltage decoupling and marine utility interconnection

**Voltformer canonical:** https://voltformer.com/product/deif-gpu-3-generator-interconnection-protection-unit - markdown version: https://voltformer.com/product/deif-gpu-3-generator-interconnection-protection-unit.md

## Overview

- **Brand:** DEIF
- **Product family:** GPU Series
- **Application:** Generator protection, power plant bay control, reverse power, synchrocheck, frequency/voltage decoupling and marine utility interconnection
- **Product type:** bay-control

## Protection & Control Functions

- **ANSI Functions:** 50/51, 50N/51N, 32, 40, 46, 25, 27/59, 81, 50BF
- **Transformer Windings:** N/A (Feeder / Bay)
- **Supports Transformer:** No
- **Supports Feeder:** Yes
- **Supports Breaker Control:** Yes
- **Arc Flash Protection:** No

## Digital Integration & Protocols

- **IEC 61850 Edition:** Ed1
- **GOOSE:** Yes
- **Sampled Values (SV):** No
- **Redundancy (PRP/HSR):** No / Optional
- **Protocols:** Modbus RTU/TCP, CANbus, Profibus DP
- **Engineering Software:** DEIF USW

## Electrical Interface

- **Frequency:** 50/60 Hz
- **Nominal Current:** 1 A / 5 A
- **Auxiliary Supply:** 12-36 Vdc / 100-240 Vac
- **Operating Temperature:** -40 to +70 °C

## Standards

- IEC 60255
- UL Listed
- DNV GL Marine
- Lloyds Register

## Sources

- https://www.deif.com/products/gpu-3

- **Source scope:** manufacturer-family
- **Last reviewed:** 2026-09-13

Manufacturer portfolio/family source. Confirm the exact order code, guaranteed ratings and project-specific options against the current OEM datasheet before procurement or an SLD study.

Technical ratings are configuration-dependent where stated by the manufacturer. Request project-specific verification before procurement.