Protection & Relays
This relay principle compares currents entering and leaving an equipment zone to detect internal faults.
What is differential protection?
These are National Grid's three (3) main voltage regulator vendors.
Who are Eaton, Toshiba, and GE?
This "N-1" criterion ensures the system remains stables with the loss of a single critical component.
What is contingency analysis?
This potential occurs when a person touches a grounded structure during a system fault.
What is touch potential?
This individual once worked at Brayton Point Power Plant during a co-op while going to college for Mechanical Engineering at WIT in 1970 (wow!)
Who is Phil Prout?
This distance relay zone typically clears faults on the entire protected line but with intentional time delay.
What is Zone 2?
This transformer protection device detects rapid oil movement caused by major internal faults.
What is the Buchholz Relay?
This study determines whether a system's reactive reserves can handle large power deficits.
What is a voltage stability analysis?
These are the two (2) cable sizes used for Personal Protective Grounds here in NE.
What are 2/0 & 4/0?
These two individuals just celebrated their 1st year work anniversary last month, coincidentally on the same day (November 4th).
Who are Mirsad Alihodzic & Nikola Nikolov.
This protection scheme trips adjacent breakers if a circuit breaker fails to clear a fault.
What is breaker failure protection? (50BF?)
In circuit breakers, this dielectric medium offers the fastest dielectric recovery and minimal maintenance.
What is vacuum or dry-air?
This time-domain simulation evaluates relay and breaker behavior during fast-changing electrical events.
What is transient stability analysis?
This sequence of events is required before a circuit can be considered "dead".
What is tested, isolated, and grounded?
This person teaches spin and archery classes on their free time.
Wo is Kim D'Acri?
This relay element detects high-speed current reversals when a line becomes part of a multi-terminal configuration.
What is a directional element? (67?)
This term describes the maximum transient voltage stress a transformer can endure without internal insulation breakdown?
What is Basic Insulation Level (BIL)?
This simulation technique is used to model the behavior of power systems under various operational conditions
What is time-domain simulation?
This soil parameter strongly influences grounding grid resistance and must be measured in-field.
What is soil resistivity?
The name of the individual that ensures barriers around NERC-CIP physical and cyber assets during our annual NERC-CIP Trainings on LearningLink.
Who is Walled Walley?
This communication-aided tripping scheme uses a permissive signal to accelerate high-speed line clearing.
What is POTT (Permissive Overreach Transfer Trip)?
This term describes the phenomenon where electrical energy is lost as heat in high voltage equipment
What is dielectric loss?
This complex engineering method evaluates the severity of ferroresonance in transformer and capacitor circuits.
What is electromagnetic transient (EMT) simulation?
This specialized approach prevents dangerous voltage rises and differences in potential during system operation or during fault conditions.
What is equipotential bonding?
The name of the woman at the front desk in Northboro?
Who is Martha Reed?