MCDLV4 Line Differential Protection

Product detail

Product code:
Request a quote Select options below to request a price.

Product Information

Download Area

Available options

Documentation (Brochures & Manuals)

Operating Software Smart view: Documentation & Setup


The MCDLV4 protection system protects cables and lines up to 24 km.

The system is able to replace up to six protection devices.

  •  2 Cable and Line Differential Devices
  • +2 Directional Feeder Backup Devices
  • +1 In-Zone Transformer Differential Device
  • +1 Mains Decoupling Device

= 6 devices combined in one system

The protection functions of the MCDLV4 have been adapted to comply with the requirements of the VDE‑AR‑N‑4110:2018.

Functional Overview

MCDLV4 Functional Overview


UL File Nr.: E217753

certified regarding UL508 (Industrial Controls)

CSA File Nr.: 251990

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


certified by EAC (Eurasian Conformity)

TÜV Nord, VDE-AR-N 4110 (2018-11), VDE-AR-N 4120 (2018-11)

Component certificate regarding the German grid code standard VDE-AR-N 4110 (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”

Key Benefits of the HighPROTEC MCDLV4

  • 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


  • Highly Selective, high speed detection of faulty cables/lines.

  • Enabling uninterrupted power supply to facility like Airports, Data Centers, Waste Water Stations,…)

  • On redundant fed HV/MV rings architectures, faulty lines can be switched off with highest speed without any dark time for the rest of the facility.

  • Making time and current grading obsolete. Don’t need to wait for timers or delays of upstream or downstream breakers.

Inputs and Outputs
Binary inputs 8 (24)
Current transformer inputs 4
Output relays 6 (19)
Voltage transformer inputs 4
Watchdog relay 1
Protection ANSI
Voltage protection 27/59
Time overcurrent protection 50/51
Inrush stabilisation (2nd harmonic)
Directional time overcurrent protection 67
Earth fault protection 50N/51N
Sensitive EF isolated/compensated 50Ns/51Ns (Option)
Resistance earthed / solidly earthed 50N/51N
Earth fault directional feature 67N
Thermal replica 49
Circuit breaker failure protection 50BF
Residual voltage 59N
Phase balance 47
Frequency protection 810/81U
Frequency gradient 81
Vector surge / mains decoupling 78V
Power direction 32/37
Negative sequence protection 46
Differential protection: Transformer 87T
Differential protection: Generator 87G
Differential protection: Line 87L
Differential protection: Restricted earth fault 87N
Q->&V< QV
Auto reclosing AR 79
Supervision ANSI
Current transformer supervision 60L
Voltage transformer supervision 60FL
Trip circuit resp. control circuit supervision 74TC
Additional Features
Control and detection of switchgears
Control and supervision of a circuit breaker
Disturbance recorder
Event recorder
Fault recorder (none volatile)
Parameter sets 4
Programmable Logic
DNP3 RTU (Option)
DNP3 TCP (Option)
IEC 60870-5-103 (Option)
IEC 60870-5-104 (Option)
IEC 61850 (Option)
Modbus (TCP) (Option)
Modbus RTU (Option)
Profibus DP (Option)
Mounting Type
Housing suitable for 19” rack mounting (Option)
Housing suitable for door mounting

© 2022 SEG ELECTRONICS GMBH | All rights reserved
webstránky | webdesign | eshopy |
Website uses cookies
We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it. Learn More