Here are some electrical abbreviation that will help you on electricity components and how to construct live wire scanner device.
ELECTRICAL ABBREIVATION
PT: potential transformer
CT: current transformer
HV: high voltage
HP: horsepower
HRC: high rupture capacity fuse
AH: ampere hour
XLPE: cross linked polyethylene
SWA: single wire armored
CB: circuit breaker
PVC: polyvinyl chloride
CCR: central control room
CAD: computer aided design
CBCU: circuit breaker control unit
AVR: automatic voltage regulator
ACSR: al conductor steel reinforced
UPS: uninterrupted power supply
AWA: aluminum wire armor
TB: terminal block
LV: low voltage
JB: junction
NC: normally close
NO: normally open
V: voltage
OLR: overload relay
OLTC: on load tap changer
OLP: overload protection
BS: British standard
DB: distribution board
RPM: revolution per minute
Q: charge
I: current
C: capacitor
XC: capacitance of the capacitor
XL: capacitance of inductor
LED: light emitting diode
R: resistance
P: power
E: electromotive force
Electrical installations: live, neutral, earth
Electricity is an extremely convenient and clean source of power. electricity is distributed throughout the whole world by a nationwide system of power stations, interconnected by cables and other necessary appliances such as transformers or grid system. Note: the domestic supply of electricity are not the same it varies according to the current your are living.
The domestic supply of electricity in some country is 220/240 a.c. which come from local substation with three cables such as live (L), neutral (B) and earth (E).
LIVE WIRE SCANNER
Here are the simple techniques on how to draw and design live wire scanner.
Live wire scanner is a simple circuit that lets you scan a 220v live wire.
The working principle of the circuit above.
The clock input of the IC is connected to a wire, which acts as the sensor. Here ,we used 10cm length 22SWG wire as the sensor. Note: when you hold the sensor, metallic copper or conductor wire close to the live wire, electric field from mains activates the circuit.
The input impedance of the CMOS IC is high, the electric field induced in the sensor is sufficient to clock it. The output at pin 11 of CD4017 drives the LED, they by flashing of the LED1 and LED2 indicates the presences that the scanner is active.
However, the circuit can be used to find stray leakage from electrical appliances like mixers, refrigerators and fans etc. also, it can be easily assembled on any general purpose board or the discrete components can be directly soldered on the IC.
Then, A 9v PP3 battery power the circuit. Note: if you use a mains adaptor, make sure that it is well regulated and isolated; otherwise, even the stray electric field from mains transformer will clock the circuit as shown above.
conclusion
electrical abbreviation and live wire scanner are the abbreviation used in electrical workshop and company’s which make engineering a very unique environment.