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DEMA 400 Series User Manual

DEMA 400 Series
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19
General Features of 400 Series Relays
Auxiliary supply voltage compatibility with all voltages in the field: (24 240) Vac /
Vdc, operational range: (22 275) Vac / Vdc.
Operational ambient temperature range: (-󰀉
Windows 32/64-bit based PC control software,
Wide communication protocols support: IEC 61850 + GOOSE, IEC 60870-5-103,
DNP 3.0, MODBUS RTU and TCP,
Wide IEC, ANSI and custom delay curve support, enabling selectivity setup with all
types of protection relays including electromechanical relays,
3- 300
VAC insulation withstand,
4-channel X/1 A and X/5 A current input with continuous 20 A and 1 s 500 A
thermal withstand, DMT and IDMT delay curve support for all current & voltage
protection functions,
Option for RMS or fundamental harmonics measurement method for various
protection functions
Remote control and monitoring of the circuit breaker via dedicated menu with mimic
diagram,
Annunciating functions and 8/10 optically coupled programmable digital inputs that
eliminate the need to use external annunciators (e.g. to evaluate Buchholz, temperature
and pressure signals), 8 programmable 8 A 250 V outputs (4 SPDT + 4 SPST),
Full screen multimeter display, measurement functions that eliminate the need to use
double core CTs and external meters,
Built-in X/1 A and X/5 A current transformer compatibility,
Super-capacitor fed real-time clock,
8 independent settings groups,
3-stage security password system,
IP52 front side and IP20 backside environmental protection,
Fast and low cost repairs thanks to the modular electronics,
3-year limited warranty, Matchless customer support, a variety of application schemas
and technical documents.

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DEMA 400 Series Specifications

General IconGeneral
BrandDEMA
Model400 Series
CategoryRelays
LanguageEnglish

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