Ashida ADR141A - System Overview and Purpose; Key Features and Functions List

ADR141A /
ADR24
1A
Doc ID : ADR241A_IM_01
Ref ID : ADR241A/IM/I&S
Rev No. : 02
Page No. : 19 of 150
1 INTRODUCTION AND SPECIFICATIONS
1.1 Overview
ASHIDA has designed economical & reliable Multifunction ADR141A/ ADR241A Protection &
Control System. The simple and compact construction of ADITYA series ADR141A/
ADR241A relay provides integrated Protection, Control and Monitoring functions for Over
head Transmission Lines, Underground cables, and Distributed Feeders.
1.2 Features
Key Protection & Control Functions:
• 4 Element (3 Phase + EF) over current IDMT with instant trip.
• Back – lit LCD display for settings.
• Display of load current in terms of primary.
• Separate curve selection for phase and EF.
• Selection of Curve: Seven selectable curves Normal Inverse1 (C1), Normal Inverse2
(C2), Very Inverse (C3), Extremely Inverse (C4), Extremely Inverse (C4A) EE
equivalent, Long Time Inverse (C5) and Definite Time (C6).
• Design using DSP technology.
• Latching of fault current up to last 5 faults with time stamping.
• Cold Load Pickup (CLP) for prolong inrush current.
• Inbuilt Trip circuit supervision function (TCS).
• Inbuilt Breaker Failure function (50BF).
• Programmable Annunciation contacts.
• Site selectable CT secondary i.e. 1A/5A
• Self Supervision of relay.
• Metering function.
• Fully communicable with IEC standard open protocol IEC60870-5-103.
• USB (at front) and RS 422/ RS 485 (at rear) communication port for remote SCADA
(Only for ADR241A i.e. communicable relay).
• User friendly local operation with key pad.
• Password Protection.
Software Support
• Online Setting Editor.
• Online Settings upload / download.
• Online Measurement.