L00.00: Acronyms

The flashcards below were created by user Sarah7755 on FreezingBlue Flashcards.

  1. SI
    Selective Intrusive (Inspection/Maintenance)
  2. MTS
    Municipal Transformer Station
  3. T
  4. G
    Generator or Ground or Governor
  5. F
    Feeder or Field
  6. TA
  7. TR
    Regulating Transformer
  8. B
  9. S
    Speed or Standby or Bypass
  10. RCS
    Recloser Control Station (Hydro One Owned)
  11. RS
    Regulating Station (Hydro One Owned)
  12. SS
    Switching Station (Hydro One owned)
  13. SCS
    Series Capacitor Station (Hydro One owned)
  14. CDS
    Customer Distribution Station
  15. CGS
    Customer Generating Station
  16. CRS
    Customer Regulating Station
  17. CSS
    Customer Switching Station
  18. CTS
    Customer Transformer Station
  19. JCT
  20. TC
    Tap Changer
  21. SC
    Static Capacitor
  22. PS
    • Phase Shifter
    • Transformer used for the regulation of voltage
    • are capable of maintaining a circuit voltage within a desirable range
  23. SA
    Surge Arrestor
  24. RMVT
    revenue metering voltage (potential) transformer
  25. CVT
    capacitor voltage transformer, coupling capacitor-voltage transformer combination, bushing potential divider
  26. MSO
    mid-span opener
  27. CVD
    coupling capacitors (capacitive voltage divider) without intermediate voltage terminal.
  28. CCVT
    CVT used as surge capacitors with secondary brought out
  29. WT
  30. NPCC
    • Northeast Power Coordinating Council
    • not-for-profit corporation in the state of New York responsible for promoting and improving the reliability of the international, interconnected bulk power system in Northeastern North America
  31. IEEE
    • Institute of Electrical & Electronics Engineers, Inc.
    • a professional not-for-profit association headquartered in New York City that is dedicated to advancing technological innovation and excellence
  32. NERC
    • North American electric Reliability Corporation
    • not-for-profit entity whose mission is to ensure the reliability of the Bulk-Power System in North America.
  33. IESO
    • Independent Electricity System Operator
    • balances the supply of and demand for electricity in Ontario and then directs its flow across the province's transmission lines.  Every five minutes, the IESO forecasts consumption throughout the province and collects the best offers from generators to provide the required amount of electricity
  34. ZTT
    • Zone Test Trip
    • P&C performs zone test trip after re-calibration of protection on transfomers, circuits, feeders and busses 
  35. PWM
    Program Work Management
  36. CMS
    • Central Maintenance Scheduling
    • Commercial corporation within the Station Services Hydro One Family providing services to the electrical power industry
  37. M&TS
    • Metering & Technical Services
    • AMI equipment, relays, and meter & relay services
  38. MTS
    (not a station)
    • Maintenance Technical Services
    • planned & corrective maintenance, capital projects, interactions with other groups SMS/ECS/AM – support teams for transformers, switchgear, ancillary, & data maintenance
  39. SVC
    • Static Var Compensator
    • A piece of equipment that generates VARS (reactive power) just like a capacitor bank – but unlike a capacitor bank, SVC is variable on command, and will generate capacitive VARS, and inductive VARS (like a reactor)
  40. DESN
    • Dual Element Spot Network
    • Station design allows for the failure or the maintenance outage of a supply circuit, transformer or station breakers without having to interrupt the load.
  41. NOMS
    • Network Outage Management System
    • provides a mechanism for users to enter a new outage or query, view the outage information, and submit the outages to the IESO
  42. NMS
    • Network Management System
    • a complete display of the Hydro One controlled grid that shows the real-time condition of all equipment operated from the OGCC but does not allow control of real equipment
  43. CRIS
    • Control Room Information System
    • provides information on equipment including ratings, Relaying, reclosure settings, Programmable Synchrocheck Relay information, Instructions and Key Operating Points
  44. SCADA
    • Supervisory Control & Data Acquisition
    • Is an ICS (industrial control system) i.e. a computer controlled system
  45. IPCC
    • Independent Phase Controlled Compensator
    • Type of capacitor – purpose is to provide VAR support and correct unbalanced voltages.  Installed at tapped Transformer Station on the 27.6kV where the supply 115 kV circuits run in proximity to the 500 kV circuits.  Are necessary because of the voltage imbalanced caused by the 500kV circuit
  46. VAR
    • Volt-Ampere Reactive
    • Type of capacitor – purpose is to provide VAR support and correct unbalanced voltages.  Installed at tapped Transformer Station on the 27.6kV where the supply 115 kV circuits run in proximity to the 500 kV circuits.  Are necessary because of the voltage imbalanced caused by the 500kV circuit
  47. OA
    • Outline Agreement
    • Hydro One's policy is to acquire, where practical, competitive bids for its purchases to maintain the integrity and transparency of the procurement process and ensure best value for dollars spent.
    • Establishes terms and conditions with a specific vendor for specific period of time – typically following competitive process
    • Used to manage repetitive high-volume transactions – eliminate need to repeat competitive process
    • Vehicle to leverage Corporate spend to derive best value
  48. HIROP
    • High Resistance Open Phase Protection
    • Distance relaying has limited coverage for high resistance ground faults and will not detect open phase faults.
    • If one phase of a high voltage line goes open without physically touching ground the fault may go undetected.
    • The inverse time over current relay connected in the neutral path of the protection has been applied for the detection of a HIROP condition. The solid state electronic type relays, which conform to an inverse time characteristic, have been standardized for use in “A” and “B” groups respectively.
  49. DUR
    • Direct Under Reaching Scheme
    • Zone 1 Protection - the ratio is set to instantly cover 80-85% of the circuit
  50. DOR
    • Direct Over Reaching Scheme
    • Zone 2 protection is set to cover 125%-150% of the circuit (will therefore overlook into adjacent zones causing erroneaous trips from faults outside the zone – to prevent this trip are normally timed)
  51. POR
    • Permissive Over Reaching Scheme
    • Type of DOR
    • Zone 2 will start a timer (400ms)Sends a Permissive signal to the "blind" station to trip.
  52. DIRC
    • Directional comparison scheme
    • Type of Zone 2 DOR protectionhas a third zone used to address the problem of direct overreach - uses an om3 relay which looks backwards if fault occurs and will trip local breakers; the zone 2 will then try to trip, but the om3 will sense the fault as well and send a blocking signal to prevent it
  53. LEO
    • Line End Open
    • scheme forms part of the "A" group only and is generally not duplicatedBecause of the high capacitive effect, 500 kV transmission lines can not be left on potential. 500 kV transmission lines have the potential to develop dangerous overvoltages when the line is in service at one terminal only. As a result, as part of the line protection scheme Line-End-Open (LEO) trip logic along with backup overvoltage protection is provided.
  54. DIFF
    • Circuit Differential
    • one of the newest generations relay schemes in critical infrastructure protectiona current imbalance resulting in current flow in the differential protection over-current relay causing it to initiate a trip
  55. SON
    • Telecommunications is on Sonnet
    • Digital Teleprotection is sometimes incorrectly called SONET protection.  Digital Teleprotection is terminal equipment that could communicate using carrier equipment with different protocols, while SONET is communication protocol/equipment that at present is used to carry both the new IMUX 2000 digital teleprotection and the old 937 analog teleprotection
  56. LTR
    • Limited Time Rating
    • have been developed for most transformers in heavy load areasThey are determined by loading to tables or to computer study limits
  57. BOA
    Breaker Oil Analysis
  58. PLC
    Power Line Carrier
  59. ULTC
    Underload Tap Changer
  60. ABB
    • Air Blast Breaker
    • has to make, carry and break normal load currents and high fault currents at voltages up to its designed maximum voltage.  Opens via pneumatic mechanism, then ARC is blasted with compressed, dry air from reservoir into arc chute where it is extinguished
  61. AC
    • Alternating Current
    • oscillating power (bi-directional)Automatic voltage regulators are used on alternating current (AC) machines; generators, frequency changers, and synchronous condensers, to smooth out voltage fluctuations and, thereby, contribute to system stability and customer satisfaction.
  62. CNF
    • Confirmed
    • An order has been confirmed when all the operations have been carried out and verified – i.e once all the operations with a PM01 control key change to CNF
    • Once the Miforms are done, and all the operations with a PM01 control key change to CNF the operation status will change to cnf.
    • Sometimes errors occur with the Miforms and orders will get stuck in PCNF status and need to be manually confirmed
  63. G&S
    Grounds & Sites

    • Infrastructure TS
    • Fences & Gravel
    • TS Copper Theft (Not for Fence) 

    • Emergency Spill Clean Up
    • Oil Containment Mtce & Repairs
    • Spill Material Purchases  

    • G&S ROW & JCT's
    • RoW G&S
    • RoW G&S - Tx Lines RoW
    • G&S - Inquiries & Site Mgmnt  

    • Distribution Stations
    • Sites
    • Snow Removal
    • Fences, Gravel, Gates
    • Buildings
    • Stolen Grounds
  64. OCB
    • Oil Circuit Breaker
    • Purpose is to open and close under normal and abnormal conditions, with particular emphasis being placed on fault conditions -  to act as an arc extinguishing agent during interruption; to insulate the live parts from grounded portions of the steel tank; to insulate the contacts from each other after the arc has been extinguished
  65. CANDU
    CANada Deuterium Uranium reactor
Card Set
L00.00: Acronyms
Show Answers