Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

RVLV3 > Inverters > Flashcards

Inverters Flashcards

1
Q

What is absorption charge?

A

Second of 3 stages
- voltage is constant, current tapers as internal battery resistance increases during charging.
Ensures complete charging.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Alternating current (AC)

A

Electrical power from power utility.
Reverses direction at regular intervals
Rated In Hz (cycles)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Hertz (Hz)

A

The frequency or number of how many times AC current reverses flow in one second. (HZ cycles)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Ambient temperature

A

Air temperature around the inverter and batteries, this affects the output power of system.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Amp/ampere (A or I)

A

A measurement of the flow of electrical current
One amp is equal to the electrical force of one volt acting across the resistance of one ohm.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Amp Hour capacity

A

Ability of a fully charged battery to deliver a specified quantity of electricity (Amp hr) at a given rate (amps) over a definite period of time (HRS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Array

A

Group of solar electric modules wired together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

AWG (American Wire Gauge)

A

Standard used to measure the size of a conductor (wire)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

AGM (Absorbed glass mat) battery

A

A lead acid, maintenance free battery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Ampacity

A

The current-carrying capacity of an electrical conductor or device, expressed in amperes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Bulk charge

A

The first of three- stage battery charging.
Current sent to batteries at max rate they accept while voltage rises to full charge level

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Series circuit

A

Voltage rises amps stay the same.
Neg to positive and then negative to to negative and positive to positive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Parallel circuit

A

Amps rise voltage stays the same.
All pos hooked to pos and all neg hooked to neg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Current

A

The rate of flow of electrical charge. The flow of Current is measured in amps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Cycle

A

Battery one discharge plus one recharge is one cycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Deep cycle

A

Deep cycle happens when a battery is discharged to 50% of its capacity (50% depth of charge)
The battery is designed to be deeply discharged then recharged repeatedly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Depth of charge (DOD)

A

Amount of energy or charge removed from the battery back, expressed as percentage.
0% depth of charge is fully charged.
100% is fully discharged

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Disable

A

Function is disabled, it’s not allowed to occur and if it’s still occurring it is terminated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Echo charger

A

Auxiliary charger that can the engine battery when main charger is in Bulk or absorption mode.
Only when house batt is 13.2V or more

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Enable

A

Function enable, it’s allowed to occur but other conditions may ache to be met before function is activated or turned on

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Equalization or equalize charge

A

A deliberate controlled overcharge of batteries.
Brings all cells to same voltage potential.
Reduces sulphate on and stratification in flooded (wet) lead acid batteries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Equalization or equalize charge

A

Harmful and not necessarily for Gel or sealed batteries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Float charge (maintenance charge)

A

The last of three stages in battery charging.
Battery full charge, charge voltage reduced to lower level to reduce gassing (boiling of electrolytes) prolongs battery life.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Gel Cell battery

A

Type of battery, uses Gelled electrolyte solution.
Sealed and are virtually maintenance free.
Not all maintenance free are Gelled cell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Grid
References utility power, system of electrical transmission and distribution lines.
26
Grid tie
Electrical system which is connected to a utility distribution grid.
27
Ground
Reference potential of a circuit. Inverter hook directly up to battery negative
28
GFCI
Protecting device that rapidly de-energizes a circuit when current to ground exceeds a set value
29
Ground Fault Protection (GFP)
Circuit protection device that prevents flow of electrical current to earth if a short circuit is present. Required for wet locations (Outdoor, kitchen)
30
High battery protection
A control circuit that disconnects charge current flowing to batteries when voltage reaches dangerous high threshold. Stops damage of boiling the electrode (or excessive gassing)
31
House battery
Connected to inverter charger, it is the large capacity, deep cycle battery.
32
Hybrid system
Uses two or more renewable energy technologies. Photovoltaic and wind system
33
Hydrometer
Simply device that measures specific gravity of battery electrolyte. 1.265 2.1V per cel
34
Specific gravity of a battery electrolyte
1.265 2.1V per cell Reading express state of charge/ discharge of a battery
35
Inductive loads
Loads that Surge at startup. (Like vacuums) Require high start up current compared to resistive loads like toasters or coffee pots.
36
Inductive loads
TV’s, VCR’s, stereos, computers, electric motors, power tools, vacuum cleaner.
37
Idel current
Amount of electrical power required to keep an inverter at standby for power on demand
38
Inrush current
Peak power that a load will draw at the instant it starts up
39
Kilowatt (kW)
One thousand watts of electricity
40
Kilowatt hour (kW/h
One kW used for 1 hour Common used measurement of electrical consumption.
41
Line loss
Voltage drop caused by resistance in a wire during transmutation of electrical power over distance. Increase DC cables the further you go from inverter to battery banks or battery
42
Lien tie
Electrical system that is connected to a utility distribution grid. Inverters designed to connect to and interact with utility power.
43
Load
Any device that consumes electricity in order to operate
44
Low battery protection
A control circuit that stops the flow of electricity from batteries when battery voltage drops to low levels. Stops over discharge of the batteries.
45
Main charger
Main charger replenishes the charge to the house batteries. Main charger can be configured as a two stage or three stage charger.
46
Modified Sine Wave (MSW)
Ac wave form that is a pulse width modified square wave. Makes the wave less square and attempts to smooth the square edges
47
Maximum Power Point Tracking (MPPT)
All PV devices have a point where maximum current is delivered. MPPT electronically adjusts the output of a PV device to max power point
48
Negative
Pertaining to electric potential. The negative terminal is the point from which electrons flow during discharge.
49
OHM
A unit for measuring electrical resistance
50
Overload/ over current protection
Control circuit designed to Pete f an inverter or similar device from Loads exceeding its output capacity. A fuse is an overload/ over current protection
51
Photovoltaic (PV) system
The components of a PV system ( solar electric generating system) usually consisting of PV modules, charge controller, circuit protectors(fuses or breakers) and batteries
52
Positive
Opposite of negative. Positive battery terminal is the point where electrons return to the battery during discharge.
53
What is a power factor?
Power factor is the ratio between true power (Watts) and apparent power (amps volts)
54
Power sharing
The feature of the charger to reduce its output when the AC power being consumed by the charger and external AC loads connected to output of the inverter are in excess of the input breaker rating
55
What is a resistive load?
Coffee makers or anything with a heater element to generate heat or light
56
What is sine wave?
Optimal output wave form of alternating current, a smooth wave going above and below zero
57
Sulphation
If lead sulphate stays on a battery for over two months it hardens, recharging does not remove it. Suphation reduces the effective plate area and also the batteries capacity. Equitation of flooded batteries helps reduce this
58
Surge capacity
About of current an inverter can deliver for short periods of time. Surge ratings can be two to three times their continuous rating. For high amp required start ups. Motors etc
59
Stratification
Electrolyte separating over time. Electrolyte at the top of battery becomes water while more acidic at the bottom. Corrosive to battery plates Equalization of flooded (wet) batteries helps reduce stratification
60
Temperature compensation
Optimal battery charging voltage depends on battery temperature. Ambient temperature increases, proper voltage for each charge stage needs to be decreased. Some have BTS battery temperature sensor. Allows charger or inverter to automatically scale charge voltage settings to compensate for ambient temperatures Others have settings for hot, cold and warm
61
TSC (temperature sensitive charging)
It is the ability of a charger to adjust to its charging voltage based on the temperature sensed at the battery bank if temp probe is used.
62
Volt- amps
Measure of “apparent” power equivalent to true power (watts) in resistive loads, but exceeding watts in non-resistive loads. VA is calculated by multiplying volts times amps without using power factor.
63
Watts (W)
Quantitative measurement of electrical power taking into account power factor Watts are calculated by multiplying volts times amps times power factor.
64
Watt Hour (W/h)
Electrical power measured in terms of time. One watt hour of electricity is equal to one watt of power being consumed for one hour.
65
Wet cell battery
Uses liquid as an electrolyte. Maintenance: Cleaning connections, checking the electrolyte level and performing equalization cycle.

RVLV3 (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions