Technosys Systems

Numerical Over Current and Earth Fault Relay Trainerwith pc interface

Current Injunction Source

- One number of auto transformer provided for current adjustment

- One number of loading transformer used for current source

- Current output applied to CT.

- One number of digital ammeter used to indicate current

- Specification: current range: 0-20Amp AC. (continuously variable)

- One number of automatic relay tripping time measurement circuit

- One number of start/stop push-to on switch provided for time measurement circuit

- One number of digital timer provided to measure relay tripping time

- One number of reset switch provided for timer reset

- One number of NO contacts @ 220V ,10Amp rating

- One number of NC contacts @ 220V ,10Amp rating

Technical specifications:

Numerical Over Current & Earth Fault Relay

- Single phase, high-set, non-directional Over current relay with instantaneous or definite time function

- Low-set non -directional Earth fault Relay with inverse definite minimum time (IDMT) or definite time characteristics

- Password protection

- 2 line 16 characters industrial grade LCD with back-lit module for numerical display of setting values and measured values which is user friendly

- Trips for default/previously selected curve if the fault occurs during settings of the relay

- Membrane key pad for easy operation, dust

proof front panel

- Enabling /Disabling of High-Set

- LED indications for power, pick-up, phase fault trip or Earth Fault trip for IDMT and High-set

- Relay test facility with relay trip & without relay trip

- Separate heavy duly output contacts provided for time delayed phase fault with high-set and time delayed Earth Fault with high-set

Numerical under/ over voltage Relay Trainer with pc interface

The relay test bench having  

- Have sturdy enclosure with colorful overlays showing circuit diagrams and its connections for easy understanding of students

- Set of instruction working manual

- Stage under/over voltage (27/59)

- Numerical, true RMS measurement

- Wide voltage setting ranges

- Multiple inverse characteristics (160)

Control Panel –

The relay has 8 output contacts

- Trip/alarm for both elements 2 N/O

- Common starter for both elements 1 N/O

- Element 1operated 1 N/O

- Element 2 operated 1 N/O

- Protection Unhealthy 1 N/C

- Timer 1 N/O - Trip circuit fail 1 N/O

- Timer for capacitor bank to switch to safer value before successive switching of the breaker

List of Experiments

- Study & testing of DMT type Over/Under-Voltage Relay with different voltage & time setting

- Study & testing of IDMT type Over/Under-Voltage Relay with differential voltage & time setting

- Plotting of IDMT characteristics of OV/UV relay in PC

- How to program a numerical relay

Detailed manual with theory and practical guidance with tables and charts

Electromechanical overvoltage relay test set

- It consists of set of associated relay testing sub sets mounted in a light weight sturdy aluminium profile flat demo panel system.

- With the testing kit should be in the main module.

- Facilitates easy and safe wiring using 4mm sturdy shrouded banana patch chords

- Have sturdy enclosure with colourful overlays showing circuit diagrams and its connections for easy understanding of students.

- Have set of instruction working manual.

- Have supplied measuring instrument with data logger

- Have multi-connection (more than one device) supported via mobile app

- Able to provide the change trend analysis accessible via special chart mode

- Voice warning supported, which assures measurement safety

- Accessible with smart voice-reading

- Able to display with + 3(5/6)-digit full scale reading,

- Supports Bluetooth 2.0 version

- Supports mobile device with Android 4.0 or above OS

Electromechanical overcurrent relay test set

Technical specifications:

Current Injection Source

• One number of auto transformer provided for current adjustment

• One number of loading transformer used for current source

• Current output applied to CT.

• One number of digital ammeter used to indicate current

• Specification: current range: 0-20Amp AC. (continuously variable)

• One number of automatic relay tripping time measurement circuit

• One number of start/stop push-to on switch provided for time measurement circuit

• One number of digital timer provided to measure relay tripping time

• One number of reset switch provided for timer reset

• One number of NO contacts @ 220V ,10Amp rating

• One number of NC contacts @ 220V ,10Amp rating

Single/Three -phase Numerical Transformer Protection Relay

- With one number of Single/ Three-phase numerical transformer protection relay

- With Resistive load

- Based on DSP Based Digital Algorithms

- With minimum Trip Time - 30ms

- Password protected

- 20x4 LCD Display

- Power system frequency 50Hz

- Field Configurable CT Secondary 1A or 5A

- Configurable to Dual Slope Characteristic

- Be able to demonstrate Transformer Differential Protection (ANSI CODE: 87)

- With 2 number of output contacts

- Capable to store history of last 20 Events

- Capable to store disturbance record of last 10 Events

- Configurable to Pre and Post Fault Cycles

- With communication Port: Front-RS232 and Rear-RS485

- With communication Protocol: Modbus

- With draw-out facility with inbuilt CT shorting

Technical specifications:

The relay test bench having  

• The relay test bench is provided with Software for oscillographic harmonic recording up to max 1200 cycles and programmable Pre fault and Post fault cycles.

• The oscillographic records can be transferred to PC via USB in COMTRADE format.

• Have sturdy enclosure with colorful overlays showing circuit diagrams and its connections for easy understanding of students.

• Detailed manual with theory and practical guidance with tables and charts

1. SINGLE PHASE TRANSFORMER:

    - One Number of Single-phase with rating: 200VA, 230/48 V Stepdown transformer is to be provided,

    - One Number of Single-phase with rating: 200VA, 24-0-24/ 24-0-24 Open type transformer is to be provided.

2. CONTROL PANEL:

    - Digital voltmeter and ammeters in the primary and secondary sides

    - Suitable fault resistances.

Capable of studying the various protection schemes of:

1. Three phase transformer. 

2. Single Phase Transformer.

Detailed manual with theory and practical guidance with tables and charts

Numerical phase distance protection Relay Trainer WITH COMPUTER INTERFACE
 

The relay test bench having  

- Provided with Software for oscillographic harmonic recording up to max 1200 cycles and programmable Pre-fault and Post-fault cycles.

- The oscillographic records can be transferred to PC via USB in COMTRADE format

- Have sturdy enclosure with colorful overlays showing circuit diagrams and its connections for easy understanding of students.

- Set of instruction working manual.

- Supplied with measuring instrument with data logger

Detailed manual with theory and practical guidance with tables and charts

Numerical directional over current Relay Trainer with pc interface

The relay test bench having  

- Have sturdy enclosure with colorful overlays showing circuit diagrams and its connections for easy understanding of students

- Set of instruction working manual

- Stage Directional Overcurrent (67)

- Numerical, true RMS measurement

- Wide Current setting ranges

Control Panel –

The relay has 8 output contacts

- Trip/alarm for both elements 2 N/O

- Common starter for both elements 1 N/O

- Element 1operated 1 N/O

- Element 2 operated 1 N/O

- Protection Unhealthy 1 N/C

- Timer 1 N/O - Trip circuit fail 1 N/O

List of Experiments

- Study & testing of DMT type Directional current relay

- Study & testing of IDMT type Directional current relay

- Plotting of characteristics of Directional Overcurrent relay in PC

- How to program a numerical relay

 Technical specifications:

- Integrated Relay with cutout and terminals

- Type -Directional over Current Relay,

- CT Input 2A,

- Function IDMT/DMT Curve IDMT/DMT curve,

- Features Self powered / supply 48vdc,

- One number of variable AC current Source of 0-20A,

- One number of Autotransformer is provided to adjust the current output continuously

- Provision to change the direction of current source.,

- One number of digital AC Ammeter (0-30A) /3.5 digit / VERITEK Make to measure the current input in amp,

- One number of Automatic trip time measurement circuit (ATTM Circuit)

- One number START push button in ATTM Circuit,

- One number STOP push button in ATTM Circuit,

- One number LCD - Digital stop Clock in ATTM Circuit to measure relay trip time in S, S/10, S/100,

- One number reset switch in front panel to restart the digital stop clock

- Software to download Disturbance Records

- Disturbance Records (to be available to be plotted in a spreadsheet)

- Disturbance data for further analysis in any Power System analysis tool

- RS232 – USB Converter Included

Detailed manual with theory and practical guidance with tables and charts

Numerical relay development environment system

Technical specifications:

Numerical Relay Development Test Bench abilities

- Implement and test any relay algorithm for applicability in real time environment.

- Take input from software simulated data to have any simulated condition.

- Carry out research.

- Use for simulation of COMTRADE file generated by relay in field.  

- Perform the simulation of the developed and coded Relay Algorithm, uploaded through NRDE Setup using RS232 port

- Program the LCD Display, Soft push buttons and Status Indicator LED using RS232 port, provided for data exchange

- Generate the required Voltage and Current Waveform using Computer software and DAC Card provided. The same has to be fed into NRDE Main unit using 8 Analog input channels provided based on the requirements.

- Show the relay operation for respective algorithm and analog inputs using the LCD Display and LED Status indicators.

- Give a stopping input signal using NRDE Relay trip command.

- Fetch digital input to take external trigger command if required by the algorithm.

Software Components of Numerical Relay Development Test Bench

NRDE application

- For configuring NRDE analog channels

- For feeding simulation data to NRDE

• Option to generate steady state waveforms

• Option to read simulation data from text file

- MPLAB X IDE

• Platform for developing the relay algorithm (embedded C language)

- COMTRADE viewer • For viewing COMTRADE files

• For converting COMTRADE file to text file compatible with NRDE

- Pre-defined Firmware libraries in MPLAB - NRDE Hardware initialization

- Instantaneous and RMS value of all channels

- Real and Imaginary components of all channels

- Phase angle computation

- 1ms counter.

- LCD display function

- LED indication function

- Relay trip command function

- External trigger input function

Hardware Components of Numerical Relay Development Test Bench

- DAC card to convert the output of PC-based waveform into analog signals

• 100k sample/s and voltage range of +/- 10 Vp

• PC based waveform through any EMTP type simulation package or from COMTRADE file

- Data acquisition through 8 analog input channels

• Two 3-phase channels

• Two 1-phase channels (can be any analog data)

- The A/D converts analog signal into samples and the Fourier technique to compute the magnitude of the signal - Implementation to be based on very high-speed DSP controller

- Serial interface for programing the relay algorithm

- Output options

• 4x20 LCD Display

• 4 Status LED

• 4 Digital trip command (will stop the input signal)

- Digital trip command to be configured to PC through the DAC card

- Flash memory (planned enhancement)

• Waveform capture – similar to disturbance recorder in relays

• Variable capture – to save the variable in algorithm. Will help to access the performance of the scheme

- Serial port to exchange the files in Flash memory

- Digital inputs

• The algorithm can take external trigger command through this

- Optional GPS time synchronization

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