Ashida Electronics Private Limited

Item Code: ADR245BV2

ADR245B is second generation Numerical 3OC + 1EF Directional Over Current Relay. It consist all the necessary protection and monitoring functions required for Normal feeder It consist of

• High Speed Digital DSP Controller
• Analog Measuring Module
• Power supply Module
• Digital Input output module.
  
  

   

The High speed Digital Signal Controller continuously monitors phase, E/F current and PT Secondary voltage along with different optical isolated status connections. The high-speed micro-controller samples these current and voltage signals through a A/D converter. The Digital Signal performs powerful Numerical Algorithms to find out RMS of fundamental & harmonic contents of the current and voltage, the direction of power flow then this value is used for protection and metering function.

The power supply module is basically DC – DC converted designed using modern PWM based Switching mode technique to convert 110Vdc station battery supply to the 12V and 24Vdc low voltage supply for relay electronics and control circuit. It also provides necessary isolation from station battery. There are two type of power supply modules are available 1) having range of 77Vdc – 260Vdc. Covering requirement of 110Vdc and 220Vdc station battery system 2) having range of 18Vdc to 52Vdc covering 24Vdc, 30Vdc, 48Vdc station battery requirement.

 The relay is having total 8 nos of high intensity dual LED for easy identification of type of fault for easy user interface. LEDs L5, L6 & L7, digital status input and control output R1 to R5 are fully programmable via keypad interface.

 

Main Functions

 

·         3 stage Directional phase over current element. (Ip>,Ip>> and Ip>>>).

·         3 stages of Directional 3Io (internally derived EF) (3Io>, 3Io>> and 3Io>>>).

·         3 stages of Non directional Ie (externally EF or REF) (Ie>, Ie>> and Ie>>>).

·         Trip Circuit Super vision.

·         Breaker Failure Detection.

·         Monitoring Functions.

·         Auto Recloser Relay (ARR).

Each of these functions are independently programmable and can be enable or disable by user depending upon requirement.

Protection Features:

 

·         4 Element (3 Phase + EF +sensitive EF) Directional / Non Directional Over current IDMT/DMT.

·         Negative phase sequence element (46)

·         Selection of Curve: Five selectable curve(Normal Inverse1 (C1), Normal Inverse2, (C2) Very inverse (C3), Extremely inverse (C4), Long time inverse (C5)) and Define Time (C6)

·          Instantaneous Over-Current Protection with adjustable timer.

·         Breaker Failure detection

·         In-built CB Trip Circuit Supervision function during pre closing and post closing of CB.

·      

For More Details Download PDF

 

 

The ADR245B are having following protection functions.

General Description :

The ADR111A is a single element OC /EF (the setting rang cove both phase / EF requirement) relay with Instantaneous high set.

ANSI	Protection Functions
50/50N	Instantaneous Protection (OC/ EF-Inst.)
51/51N	Time Over current Protection (OC/ EF-IDMT.)
* 64N	Restricted Earth Fault.
* The Relay can be use ether phase or EF or REF.

Specifications :

·         Back - lit LCD display for settings.

·         Display of fault current / Load current.

·         Selection of Curve: Six selectable curves (Normal Inverse 1 (C1), Normal Inverse 2 (C2), Very Inverse (C3), Extremely Inverse (C4), Long Time Inverse (C5) & Definite Time (C6).

·         Design using DSP technology.

·         Latching of fault current up-to last 5 fault.

·         Site selectable CT secondary.

·         Relay can be made either IDMT or Define time.

·         Programmable operating time in instantaneous element.

·         Breaker Fail Function.

·         Suitable For REF Protection.

General Description :

The ADR211A is a single element communicable OC /EF (the setting rang cove both phase / EF requirement) relay with Instantaneous high set.

ANSI	Protection Functions
50/50N	Instantaneous Protection (OC/ EF-Inst.)
51/51N	Time Over current Protection (OC/ EF-IDMT.)
* 64N	Restricted Earth Fault.
* The Relay can be use ether phase or EF or REF.

Specifications :

·         Back - lit LCD display for settings.

·         Display of fault current / Load current.

·         Selection of Curve: Six selectable curves (Normal Inverse 1 (C1), Normal Inverse 2 (C2), Very Inverse (C3), Extremely Inverse (C4), Long Time Inverse (C5) & Definite Time (C6).

·         Design using DSP technology.

·         Latching of fault current up-to last 5 fault.

·         Site selectable CT secondary.

·         Relay can be made either IDMT or Define time.

·         Programmable operating time in instantaneous element.

·         Breaker Fail Function.

·         Suitable For REF Protection.

·         SCADA Compatibility (RS232 and RS485 Communication For model ADR211A).