MCDGV4 Generator Protection Device (MCDGV4-2C0BIA)

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Product number: MCDGV4-2C0BIA

Configuration

The generator differential protection relay MCDGV4 is a high precision protection for medium and high power generators. The step-up transformer can be integrated into the protection zone (unit protection/ block protection). In addition to the phase and earth differential protection, the device provides a variety of generator-specific protection functions.

The “all-inclusive” package comprises also phase, earth current, voltage, frequency and power protection. In addition to that the device offers an undervoltage directional reactive power protection with reconnection function and an adjustable Fault Ride Through (FRT) with AR detection.

The intuitive operating concept with plausibility checks and extensive commissioning functions such as the built-in fault simulator allows a safe and time-optimized maintenance and commissioning. The parameter setting and evaluation software Smart view can be used consistently across the entire family of devices.

Functional Overview

Certifications

CE Logo
UL Logo

UL File Nr.: E217753

certified regarding UL508 (Industrial Controls)

CSA Logo

CSA File Nr.: 251990

certified regarding CSA-C22.2 No. 14 (Industrial Controls)

EAC Logo

EAC

certified by EAC (Eurasian Conformity)

KEMA Labs

KEMA

Type tested (and certified) regarding IEC 60255‑1 and regarding IEC 61850

TÜV Nord, VDE-AR-N 4110 (2018-11)

Component certificate regarding the German grid code standard VDE-AR-N 4110 (2018-11)

TÜV Nord, VDE-AR-N 4120 (2018-11)

Component certificate regarding the German grid code standard VDE-AR-N 4120 (2018-11)

  • Complies with IEEE 1547‑2003

  • Amended by IEEE 1547a‑2014

  • Complies with ANSI C37.90‑2005

  • Complies with “Engineering Recommendation G99 Issue 1 Amendment 6 – March 2020”

  • Wide range power supply: 24 … 270 VDC / 48 … 230 VAC

  • VT measurement from 0 V up to 800 VAC (300 VAC for some order options)

  • CT measurement always with 1 A and 5 A

  • Plausibility verification intelligence

  • Optimized functional overview by hiding unused functions, parameter and assignments

  • On-board testing without removing the wiring

  • Menu Languages supported: English, German, Spanish, Portuguese, French, Russian, Polish, Romanian

Protection of electrical (HV, MV) synchronous generators against:

  • Thermal damage due to overload/short circuit

  • Inadvertent energization

  • Managing Overload by Load shedding by ROCOF, Underfrequency,…

  • Severe Out of Step damages

  • Underexcitation damages

  • Stator Earth Fault / insulation damages

  • Rotor Earth fault detection

  • Insulation damage due to overvoltage

  • Insulation damage detection by differential current principle

  • Overfluxing (Step-up-Transformer)

  • Reverse Power (indicating outage of the prime mover)

  • Overfrequency, Underfrequency (over-/underspeed)

  • Vector surge protection against asynchrounous coming back of grid voltage after power outage (e.g. caused by auto reclosure)

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