MCDGV4 Generator Protection Device
Description
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
Features
- 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
Documentation (Brochures & Manuals)
MCDGV4-3.7-EN-WDG