AL-E290C 3PHASE PERCENTAGE BIASED DIFFERENTIAL PROTECTION RELAY TRAINER // WITHOUT PC INTERFACE

Description

AL-E290C 3PHASE PERCENTAGE BIASED DIFFERENTIAL PROTECTION RELAY TRAINER // WITHOUT PC INTERFACE

Overview

The AL-E290A is a comprehensive modular training system designed for hands-on study of percentage biased differential protection relays (Merz-Price method). It enables students and professionals to understand, test, and analyze transformer differential protection under both in-zone and out-of-zone fault conditions in a safe, controlled laboratory environment.

Scope of Learning

• Plot characteristics of percentage biased differential relay (Merz-Price method)
• Perform pick-up test for differential relay
• Study transformer protection for in-zone trip faults
• Study transformer protection for out-of-zone / through faults (non-trip conditions)

Technical Specifications of measuring instruments and power supply on control panel

• AC supply: 0–415 V, 5A autotransformer; mains 415 V, 50 Hz ±10 %. 24V-220V dc for Numerical relay with protection from overvoltage and undervoltage and overload conditions
• 4-pole MCB (415 V / 16 A), R-Y-B indication, contactor, emergency stop, R-Y-B-N distribution.
• Digital meters voltmeters (AC 500 V), ammeters (AC 20 A), multifunction meter (V, I, Hz, PF, kVA, kW, kWh with optional Modbus RTU), connected with CTs internally 30/5 3no.
• Digital timer to measure the elapsed time between Normal to trip.
• Tripping indication,lamps for normal/trip status.

Salient Features

ü  Input 3 phase input starter panel , 4 pole MCB of 415V/2A or single phase supply with MCB control ,  A control Contactor with 230/50Hz/11VACoil, start and stop buttons to turn on the control panel for safe operation, electronics  O/L Relay with range 1-30A (settable) . R-Y-B Input Indicators.

ü  Green SBS5 socket is provided for extend earth.

ü  Emergency stop switch to stop the panel in extreme hazordous conditions

ü  A tower light  to show the indications of the panel status , Red for fault , yellow for stop, Green for normal working conditions.

ü  Front panel built with high class insulated Printed Circuit Board sheet with well printed circuits and   symbols.

ü   The trainer frame housed in Modular Rack Type Aluminum Extruded 40x40 channel.

ü  MCB for Short Circuit protection

ü  Instruction manual with complete detailed programs and installation procedures included.

ü  Connections are brought out through 4mm Colored Sockets.

ü  Required no’s of Patch Cords 4mm will be provided along with trainer

ü  The trainer modules are housed in MS cabinet duly powder coated

ü  Ensuring secure earthing provided into the panel for human being safety

Modules specification in control panel Module EMT-1 – Power Control Unit

• 4-pole MCB, 415 V / 16 A

·        Input 3 phase input starter panel , 4 pole MCB of 415V/2A or single phase supply with MCB control ,  A control Contactor with 230/50Hz/11VACoil, start and stop buttons to turn on the control panel for safe operation, electronics  O/L Relay with range 1-30A (settable) . R-Y-B Input Indicators.

• 3-phase power indication (R-Y-B)
• Emergency stop push-button to terminate the control panel in case of hazardous conditions
• R-Y-B-N output distribution terminals
• Ensuring the complete earthing of the control panel for human safety

Module EMT-4 – Multifunction Meter

• Bidirectional multifunction meter, 3-phase 3/4-wire, 415 V AC
• CT input: 5 A connected inside in each phase
• LCD/LED display
• Auxiliary supply: 230 V, 45–65 Hz, 5 W
• Measured parameters: Voltage, Current, Frequency, Power Factor, kVA, kW, kWh
• Optional Modbus RTU (RS-485) for RTU/SCADA interface

Module EMT-2 (×3)

• Digital voltmeter: AC 500 V
• a digital timer with Start/Stop and Reset functionswith start and stop input sockets
• Operable on 230 V AC)

Tripping Indication And current transformer module

• Two lamp holders (230 V), One module of 2 CTS of required rating mounted on board
• Indication for Normal and Trip conditions

Voltage transformer module 

               PTs 3 nos with Voltage transformer is provided

               The voltage transformer of required rating as per the design requirement

Differential Protection Relay Module

Key Features

• Biased current differential protection
• Fast differential Hi-set
• Dual-slope characteristics
• Inbuilt CT ratio correction factor (avoids external interposing CTs)
• Adjustable 2nd harmonic restraint (for inrush)
• Adjustable 5th harmonic blocking (for over-excitation)
• Inbuilt vector group compensation
• Two groups of settings
• History of 5 latest faults
• Stability on external phase-to-phase and phase-to-ground faults

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Technical Specifications (from manufacturer data)Ratings

• Primary current rating: 0.577 A / 1 A / 2.89 A / 5 A
• Secondary current rating: 0.577 A / 1 A / 2.89 A / 5 A
• Auxiliary supply:
• 20–60 V DC
• 75–150 V DC (or AC/DC in some listings)
• 175–300 V DC / 185–250 V AC

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Settings

• Pickup ( 12ik"> i_k): 0.10 to 1.00 pu (steps of 0.05 pu)
• Slope1 (DF1): 10 to 100% (steps of 5%)
• Slope2 (DF2): 50 to 200% (steps of 5%)
• Breakpoint ( 12kp"> k_p): 1.0 to 10.0 pu (steps of 0.1 pu)
• Differential Hi-set: 2 to 20 pu (steps of 1 pu)
• CT Ratio W1: 0.5 to 2.00 pu (steps of 0.01 pu)
• CT Ratio W2: typically in related percentage steps (manufacturer lists 10–50% in some extracts)
• Inrush (2nd harmonic): 10 to 100% (steps of 5%)
• Over-excitation (5th harmonic): adjustable
• Vector groups supported: Yy0, Dd0, Yd1, Dy1, Dd2, Dd4, Yd5, Dy5, Yy6, Dd6, Yd7, Dy7, Dd8, Dd10, Yd11, Dy11 (and similar)

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Overload Ratings (Current Inputs)

• 2 × rated continuous
• 20 × rated for 3 s
• 40 × rated for 1 s

Burden

• Current input: 0.1 VA per phase (rated 5 A); 0.05 VA per phase (rated 1 A)
• Auxiliary supply: < 6 W (non-operated); < 11 W (operated)

3-Phase Voltage and Current Source Module

• Dedicated circuit for Differential Protection Relay experiments
• 4A autotransformer, 3 no’s to vary the voltage from 0-230V, 50HZ line to neutral & 415V,50Hz line to line with 0-48V, 10A output to bias of transformer primary winding, output voltage provided through 4 mm safety sockets

Packing List (Standard Supply)

Technical Details