Relay Protection Logic and Device Number - Power plant


Turbine Generator Protection Logic and Device Numbers - Power Plant 








CLASS A PROTECTION -GENERATOR TRIP & EXCITER TRIP


Sr.n o RELAY NO PROTECTION STAGES STATUS
1 59 OVER VOLTAGE PROTECTION 2nd stage  CONNECTED
2 27 UNDER VOLTAGE PROTECTION 2nd stage   
3 81U UNDER FREQENCY PROTECTION 2nd stage   
4 81O OVER FREQENCY PROTECTION 2nd stage   
5 32P  REVERSE ACTIVE POWER PROTECTION    
6 46 NEGETIVE PHASE SEQUENCE PROTECTION 2nd stage  
7 32Q REVERCE REACTIVE POWER PROTECTION   NOT CONNECTED
8 37 LOW FORWARD POWER PROTECTION   CONNECTED
9 51V VOLTAGE CONTROLLED OVER CURRENT PROTECTION    
10 50 INST OVER CURRENT PROTECTION    
11 50/27 UN-INTENTIONAL ENERGISATION AT STAND STILL PROTECTION    
12 51 IDMT- OVER CURRENT PROTECTION    
13 40 LOSS OF EXCITATION PROTECTION    
14 21G BACK UP IMBEDANCE PROTECTION 2nd stage  
15   EMERGENCY TRIP     
16   GEN WINDING TEMP VERY HIGH    
17   GEN CORE TEMP VERY HIGH    
18'   DE/NDE COLD AIR TEMP VERY HIGH    
19   DE/NDE HOT AIR TEMP VERY HIGH    

CLASS B TRIP ( GEN , TURBINE & EXCITER TRIP)


Sr.n oRELAY NOPROTECTIONSTAGESSTATUS
187GGENERATOR DIFFERENTIAL PROTECTIONCONNECTED
250NNON DIRECTIONAL INST EARTH FAULT PROTECTION
351N NON DIRECTIONAL IDMT EARTH FAULT PROTECTION
464F1/F2ROTOR EARTH FAULT PROTECTION1st & 2nd stagePROPERLY NOT CONNECTED
567NSENSITIVE DIRECTIONAL EARTH FAULT PROTECTIONCONNECTED
6EMERGENCY TRIP FROM TC PANEL
7DE/NDE BEARING TEMP HIGH FROM TEMP SCANNER
80-95%STATOR EARTH FAULT PROTECTIONNOT CONNECTED
995%-100%STATOR EARTH FAULT PROTECTIONNOT CONNECTED

CLASS C PROTECTION ( GRID BKR TRIP)


Sr.n oRELAY NOPROTECTIONSTAGESSTATUS
159OVER VOLTAGE PROTECTION1st stageCONNECTED BUT NOT TAKEN IN LINE
227UNDER VOLTAGE PROTECTION1st stage
381UUNDER FREQENCY PROTECTION1st stage
481OOVER FREQENCY PROTECTION1st stage
546NEGETIVE PHASE SEQUENCE PROTECTION1st stage
621G BACK UP IMBEDANCE PROTECTION1st stage
7DF/DTRATE OF CHANGE OF FREQUENCY PROTECTION
859DNEUTRAL VOLTAGE DISPLACEMENT PROTECTION

Production Relay Device Numbers 




List of device numbers and acronyms[edit]
  • 1 – Master Element
  • 2 – Time Delay Starting or Closing Relay
  • 3 – Checking or Interlocking Relay
  • 4 – Master Contactor
  • 5 – Stopping
  • 6 – Starting Circuit Breaker
  • 7 – Rate of Change Relay
  • 8 – Control Power Disconnecting Device
  • 9 – Reversing Device
  • 10 – Unit Sequence Switch
  • 11 – Multi-function Device
  • 12 – Overspeed Device
  • 13 – Synchronous-speed Device
  • 14 – Underspeed Device
  • 15 – Speed – or Frequency, Matching Device
  • 16 – Data Communications Device
  • 17 – Shunting or Discharge Switch
  • 18 – Accelerating or Decelerating Device
  • 19 – Starting to Running Transition Contactor
  • 20 – Electrically Operated Valve
  • 21 – Distance Relay
  • 22 – Equalizer Circuit Breaker
  • 23 – Temperature Control Device
  • 24 – Volts Per Hertz Relay
  • 25 – Synchronizing or Synchronism-Check Device
  • 26 – Apparatus Thermal Device
  • 27 – Undervoltage Relay
  • 28 – Flame detector
  • 29 – Isolating Contactor or Switch
  • 30 – Annunciator Relay
  • 31 – Separate Excitation
  • 32 – Directional Power Relay or Reverse Power Relay
  • 33 – Position Switch
  • 34 – Master Sequence Device
  • 35 – Brush-Operating or Slip-Ring Short-Circuiting Device
  • 36 – Polarity or Polarizing Voltage Devices
  • 37 – Undercurrent or Underpower Relay
  • 38 – Bearing Protective Device
  • 39 – Mechanical Condition Monitor
  • 40 – Field (over/under excitation) Relay
  • 41 – Field Circuit Breaker
  • 42 – Running Circuit Breaker
  • 43 – Manual Transfer or Selector Device
  • 44 – Unit Sequence Starting Relay
  • 45 – Abnormal Atmospheric Condition Monitor
  • 46 – Reverse-phase or Phase-Balance Current Relay
  • 47 – Phase-Sequence or Phase-Balance Voltage Relay
  • 48 – Incomplete Sequence Relay
  • 49 – Machine or Transformer, Thermal Relay
  • 50 – Instantaneous Overcurrent Relay
  • 50G- Instantaneous Earth Over Current Relay (Neutral CT Method)
  • 50N- Instantaneous Earth Over Current Relay (Residual Method)
  • 51 – AC Inverse Time Overcurrent Relay
  • 51G- AC Inverse Time Earth Overcurrent Relay (Neutral CT Method)
  • 51N- AC Inverse Time Earth Overcurrent Relay (Residual Method)
  • 52 – AC Circuit Breaker
  • 52a- AC Circuit Breaker Position (Contact Closed when Breaker Closed)
  • 52b- AC Circuit Breaker Position (Contact Open when Breaker Closed)
  • 53 – Exciter or DC Generator Relay
  • 54 – Turning Gear Engaging Device
  • 55 – Power Factor Relay
  • 56 – Field Application Relay
  • 57 – Short-Circuiting or Grounding Device
  • 58 – Rectification Failure Relay
  • 59 – Overvoltage Relay
  • 60 – Voltage or Current Balance Relay
  • 61 – Density Switch or Sensor
  • 62 – Time-Delay Stopping or Opening Relay
  • 63 – Pressure Switch
  • 64 – Ground Detector Relay
  • 64R- Restricted earth fault
  • 65 – Governor
  • 66 – Notching or Jogging Device
  • 67 – AC Directional Overcurrent Relay
  • 68 – Blocking Relay
  • 69 – Permissive Control Device
  • 70 – Rheostat
  • 71 – Liquid Level Switch
  • 72 – DC Circuit Breaker
  • 73 – Load-Resistor Contactor
  • 74 – Alarm Relay
  • 75 – Position Changing Mechanism
  • 76 – DC Overcurrent Relay
  • 77 – Telemetering Device
  • 78 – Phase-Angle Measuring Relay or "Out-of-Step" Relay
  • 79 – AC Reclosing Relay (Auto Reclosing)
  • 80 – Flow Switch
  • 81 – Frequency Relay
  • 82 – DC Reclosing Relay
  • 83 – Automatic Selective Control or Transfer Relay
  • 84 – Operating Mechanism
  • 85 – Communications,Carrier or Pilot-Wire Relay
  • 86 – Lockout Relay/Master Trip
  • 87 – Differential Protective Relay
  • 88 – Auxiliary Motor or Motor Generator
  • 89 – Line Switch
  • 90 – Regulating Device
  • 91 – Voltage Directional Relay
  • 92 – Voltage and Power Directional Relay
  • 93 – Field Changing Contactor
  • 94 – Tripping or Trip-Free Relay
  • 95 – For specific applications where other numbers are not suitable
  • 96 – Busbar Trip Lockout relay
  • 97 – For specific applications where other numbers are not suitable
  • 98 – For specific applications where other numbers are not suitable
  • 99 – For specific applications where other numbers are not suitable
  • 150 – Earth Fault Indicator
  • AFD – Arc Flash Detector
  • CLK – Clock or Timing Source
  • DDR – Dynamic Disturbance Recorder
  • DFR – Digital Fault Recorder
  • DME – Disturbance Monitor Equipment
  • ENV – Environmental Data
  • HIZ – High Impedance Fault Detector
  • HMI – Human Machine Interface
  • HST – Historian
  • LGC – Scheme Logic
  • MET – Substation Metering
  • PDC – Phasor Data Concentrator
  • PMU – Phasor Measurement Unit
  • PQM – Power Quality Monitor
  • RIO – Remote Input/Output Device
  • RTU – Remote Terminal Unit/Data Concentrator
  • SER – Sequence of Events Recorder
  • TCM – Trip Circuit Monitor
  • LRSS - LOCAL/REMOTE SELECTOR SWITCH
  • SOTF - Switch On To Fault


Please Comment if you have any Question. Credit to Siva sir  

Produced By Ghunasheelan Balamurugan Power plant  Technical Collection and Studies  

Comments

Post a Comment

Popular posts from this blog

Basics Of Transformer Design

Image
BASICS OF TRANSFORMER DESIGN  Introduction :         it’s simply a device used for either stepping-up or stepping down an applied input AC through magnetic induction in between its two windings. Basically a transformer will have the following main components: 1.Iron core stampings (configured either as U/T or E/I, generally the later is used more extensively). 2.Central plastic or ceramic bobbin surrounded by the above iron core stampings. 3 . Two windings (electrically isolated and magnetically coupled) using superenameledcopperwiremadeoverthebobbin. 4. Normally the winding which is designated to receive the input supply is termed as the “Primary” and the winding which in response to this input produces the required induced voltage as the output is termed as the “secondary” winding. Designing your own...
Read more

Standard Operation Procedure Dc Motor - Power Plant

Image
STANDARD OPERATION PROCEDURE FOR  ELECTRICAL DEPARTMENT – CPP DC Motors Operation   Objective..................................................................................................  Scope........................................................................................................  Responsibility ......................................................................................... Input ........................................................................................................ Output ..................................................................................................... Process .................................................................................................... Process Performance Parameter and Process Control Parameter............ ...
Read more

Post 04 - Power Plant Equipments and its Functions

Image
FUNCTIONAL DESCRIPTION Power Plant  In Thermal Power Station fuel burns & use the resultant to make the steam, which derives the turbo generator. The Fuel i.e. coal is burnt in pulverized from. The pressure energy of the steam produce is converted into mechanical energy with the help of turbine. The mechanical energy is fed to the generator where the magnet rotate inside a set of stator winding & thus electricity is produced in India 65% of total power is generated by thermal power stations. To understand the working of the Thermal Power Station plant, we can divide the whole process into following parts. 1.          COAL FLOW In coal fired plants, raw material are air & water in PTPS, coal is transported through Railway wagons from M/s Coal India & is kept reserved on a buffer stock. The brought out to the station is unloaded with the help of wagon tippler. After unloading, the coal is sent to crushe...
Read more