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Frequently asked questions ppt
Post: #1

Frequently asked questions

.pdf  Frequently asked.pdf (Size: 1.07 MB / Downloads: 83)

Q. What is the red light on the meter for?
A. The red light is much like the spinning disc you would see in an earlier model electricity meter. It can indicate when you are consuming (importing) electricity from the grid. The light may appear to be off or flash very slowly when you are consuming very little electricity. It will flash faster or even appear to be constantly on when you are consuming greater amounts of electricity.
Equally if power consumption stops when the red light is on, the red light may remain on (in a spinning disc type electricity meter the disc would stop turning).
For information on the amount of power imported and exported from your home/business, customers should refer to the meter registers 03 and 09.

Q. How much power am I putting back (exporting)
into the grid?

A. This is determined by how much energy your solar–powered system is generating and how much you are
using. Any excess energy is exported to the grid.
Export mode (putting energy back into the grid)
If your solar-powered system generates 1000W and you
are using 600W, then 400W will be put back (exported)
to the grid.
Import mode (importing energy from the grid)
If your solar-powered system generates 1000W and you
are using 1200W then you are using (importing) 200W
from the grid.
Frequently asked questions

Q. How much money will I get back from the power
I ‘export’ back into the grid?

A. Your retailer will be able to provide you with this information.

Q. Why is the reading on my solar-powered system
(if the unit is fitted with a display) not the same
as the ETSA Utilities solar import/export meter?

A. The reading on the display (if fitted) on the solar-powered system shows the total amount of energy being generated by your solar-powered system at that time.
The ETSA Utilities solar import/export meter shows the
total accumulated amount of solar energy your system has put back into the grid from the time it was first installed.

Q. Will my solar-powered system be able to generate power for use during a power failure to the area?

A. No, for safety reasons, your solar-powered system should automatically turn off during a network power failure.
Post: #2
Frequently asked questions

.pdf  1Frequently.pdf (Size: 493.17 KB / Downloads: 47)

Q. What’s the main difference between 3Q and standard (4Q) triacs?
A 3Q (or ‘Hi-com’) triac allows triggering in quadrants I, II and III only. A
standard triac can be triggered in all 4 modes.

Q. What benefits do 3Q triacs provide to the circuit designer?
Reliable circuit designs using 4Q triacs to control non-resistive loads must
include additional protection components to minimize the risk of false triggering
(uncontrolled triac conduction). These comprise an RC Snubber across the
triac’s main terminals and an inductor in series with the triac. 3Q triacs have
eliminated/reduced the need for protection components, making circuit design
for non-resistive loads more reliable, cheaper and smaller.

Q. Which 3Q triacs are available from Philips Semiconductors?
We provide the widest 3Q triac portfolio, in a variety of leaded and surface
mount packages. The range covers 1 A, sensitive-gate, surface-mount triacs to
25 A leaded devices.

Q. For which applications are 3Q triacs beneficial?
Any application that has a non-resistive load. For example, domestic/industrial
motor control applications, transformer loads and ignition circuits.

Q. Which 3Q triac will provide the best immunity to loss of control?
There is an inverse relationship between gate sensitivity and commutation ability,
i.e. the lower the gate sensitivity, the better the commutation performance.
Therefore the B series, which have the least sensitive gates, should be used in
applications which require a high immunity to loss of control.

Q. Which 3Q triac is best for applications with a limited drive current?
The D and E series, with respective gate sensitivities of IGT = 5 mA and
IGT = 10 mA, offer the highest gate sensitivity. Therefore, they’re easily driven
by low drive-current logic and microcontroller outputs.

Q. Which triac should be selected if a slightly better commutation ability, than that
offered by the D/E series, is required?

An F-series type. With an IGT of 25 mA, it offers a good compromise between
gate sensitivity and commutation performance.

Q. Which packages are currently available?
Leaded: T0220AB (SOT78), SOT186A (isolated TO220AB) and SOT82.
Surface-mount: SOT223, DPAK (SOT428) and D2PAK (SOT404).
Post: #3
thanks for the PDF

Marked Categories : 3q 4q triac difference, 3q hi com triac example, difference between 3q and 4q triac, frequently asked questions,

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