Haryana BSEH Secondary NSQF Power flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

NSQF Level 4 electrician role

A skilled trade qualification covering installation, testing, and maintenance of wiring under supervision, typically after class 10 plus vocational training.

Haryana distribution companies

DHBVN and UHBVN are the two state-owned distribution utilities serving southern and northern Haryana respectively, handling consumer supply and metering.

Power Sector Skill Council

The sector skill council that develops National Occupational Standards and qualification packs for power generation, transmission, distribution, and related job roles.

Career path to junior engineer

Progression from technician through senior technician, then a diploma or degree in electrical engineering, followed by utility recruitment exams for junior engineer posts.

Current thresholds for electric shock

Roughly 1 mA is perceptible, 10 to 15 mA causes muscle tetanus, 30 mA causes respiratory difficulty, and 50 to 100 mA can trigger ventricular fibrillation.

Lockout tagout procedure

Isolate the supply, apply a personal lock and tag, test the circuit dead with a proven tester, and confirm restoration only after all locks are removed.

First aid for electric shock

Switch off or isolate the supply before touching the casualty, then check breathing and pulse, start CPR if trained, and call emergency medical help.

Fire extinguisher for live electrical fire

Class C fires involve energized electrical equipment and require carbon dioxide or dry powder extinguishers; water and foam conduct and must never be used.

Ohm's law and power formulas

Voltage equals current times resistance. Power equals voltage times current, also current squared times resistance, and voltage squared divided by resistance.

RMS value of sine wave

The root mean square value of a sinusoidal AC quantity equals the peak value divided by the square root of two, approximately 0.707 times peak.

Series and parallel resistance

Series resistances add directly. Parallel resistances combine as the reciprocal of the sum of reciprocals, giving a total smaller than the smallest branch.

Electrical energy unit kWh

One kilowatt-hour equals 1000 watts consumed for one hour, the standard billing unit; energy in kWh equals power in kW multiplied by hours.

Copper versus aluminium conductors

Copper has lower resistivity and better conductivity; aluminium is lighter and cheaper but needs a larger cross-section to carry the same current.

XLPE cable insulation

Cross-linked polyethylene insulation withstands higher conductor temperature, around 90 degrees Celsius, than PVC, allowing greater current ratings.

Silicon steel transformer core

An alloy with high permeability and low hysteresis loss, laminated to reduce eddy currents, used for transformer and motor magnetic cores.

Megger insulation resistance test

An instrument applying 500 or 1000 volts DC to measure insulation resistance in megohms; a healthy low-voltage installation usually reads at least one megohm.

Ammeter and voltmeter connection

An ammeter is connected in series with the load and has very low resistance; a voltmeter is connected in parallel and has very high resistance.

Clamp meter use

Measures alternating current without breaking the circuit by clamping around one conductor and sensing the magnetic field; clamping both supply and return reads zero.

Earth electrode resistance limit

Earth resistance is measured with an earth tester; domestic installations generally require a value below about five ohms for effective fault protection.

Conduit fill rule

The total cross-sectional area of all cables drawn into a conduit should not exceed roughly forty percent of the conduit's internal cross-sectional area.

Two-way switch wiring

Two strapper wires connect the two switches, with the phase feed at one common terminal and the lamp at the other, allowing control from either position.

Indian wire colour code

Phase conductors use red, yellow, and blue; neutral is black; the protective earth conductor is green or green with yellow stripes.

MCB trip curve types

Type B trips instantaneously at three to five times rated current, type C at five to ten times, and type D at ten to twenty times.

RCCB function and sensitivity

A residual current circuit breaker detects earth leakage current and trips; thirty milliampere sensitivity is used for personal protection but it gives no overload protection.

Earthing purpose in installation

Provides a low-resistance path for fault current so the protective device operates quickly, and holds metal enclosures near earth potential to limit touch voltage.

Why transmission uses high voltage

For the same transmitted power, raising voltage lowers current, and since line loss depends on current squared times resistance, losses fall sharply.

Indian distribution voltage levels

Primary distribution runs at 11 kV or 33 kV, and final consumer supply is 415 volts three-phase four-wire or 240 volts single-phase.

Solar PV module to array

Solar cells are connected in series to form a module, modules in series form a string, and strings in parallel form an array feeding an inverter.

Transformer turns ratio

Primary voltage divided by secondary voltage equals primary turns divided by secondary turns, and also equals secondary current divided by primary current.

Transformer core and copper losses

Iron loss from hysteresis and eddy currents is nearly constant at fixed voltage and frequency; copper loss varies with the square of load current.

Induction motor slip

Slip equals synchronous speed minus rotor speed, divided by synchronous speed; typical full-load slip for a standard three-phase induction motor is two to five percent.

Resume structure for technician jobs

Include contact details, a short objective, education with NSQF level, technical skills and certifications, and work experience listed newest first.