What is a Low-frequency inverters ?
Low-frequency inverters have the advantage over high-frequency inverters in two fields: peak power capacity, and reliability. Low-frequency inverters are designed to deal with higher power spikes for longer periods of time than high-frequency inverters. Power spikes can occur for a number of reasons (e.g. devices like power tools, pumps, vacuum cleaners and other appliances with electric motors require high starting power); when inverters experience such spikes, they can endure the increased power for a short period of time before shutting down in order to prevent any damage being done to them. Low-frequency inverters have much greater peak power capacity to handle large loads with power spikes than high-frequency inverters. In fact, low-frequency inverters can operate at the peak power level which is up to 300% of their nominal power level for several seconds, while high-frequency inverters can operate at 200% power level for a small fraction of a second. The second main difference is reliability: low-frequency inverters operate using powerful transformers, which are more reliable and sturdy than the high-frequency inverter’s MOSFETs, which use electronic switching and more prone to damage, particularly at high power levels.
In addition to these qualities, low-frequency inverters come with a wide range of technical features and capabilities which most high-frequency inverters lack; these include a built-in battery charger; UPS (Uninterruptible Power Supply) functions; by-pass mode with no battery connected; power saving mode; various charge settings (like different battery types and charging voltages).
In terms of other differences, low frequency inverters are designed for large off-grid power systems and are more suitably equipped for powerful appliances; therefore, they are typically within the high power category of invertor, with their power levels normally within the thousands, typically 2000W-3000W and above (high frequency inverters are also available in lower power categories such as 300W, 600W, 1000W, 1500W etc.) In addition, in most cases low frequency inverters do not include mains power sockets – they come with terminals where AC wires should be connected which then connect to mains sockets.
Low-frequency inverters are not ideal for everyone; they’re very large and are considerably heavier than high-frequency inverters, and would be best suited for those who either are building an off-grid power system with no significant power restrictions, or who run powerful appliances and devices with electric motors like power tools, washing machines, vacuum cleaners and air conditioners. Low-frequency inverters are also best suited for those who want to power various kitchen appliances such as refrigerators, microwaves, dishwashers and ovens.
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Specification:
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JN-L
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30112
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35112
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50112
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70112
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70124
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10224
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15224
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15248
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20248
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Rated Capacity(W)
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300W
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350W
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500W
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700W
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700W
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1000W
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1500W
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1500W
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2000W
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Battery
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12V/24V
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24V/48V
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Product Size(D×W×H）
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345×210×122
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365×142×200
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405×180×320
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Carton
Size(D×W×H）
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385×270×185
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396×190×240
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460×240×380
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N.W.(kg)
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6
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7
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8
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11
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11
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13
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18
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18
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20
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G.W.(kg)
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7
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8
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9
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12
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12
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14
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19
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19
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21
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Specification
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JN-L
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30224
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30248
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40248
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50296
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70296
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702192
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103192
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153192
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203192
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Rated Capacity(W)
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3000W
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3000W
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4000W
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5000W
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7000W
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7000W
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10000W
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15000W
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20000W
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Battery
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24V/48V
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48V/96V
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96V/192V
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192V/220V
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Product Size(D×W×H）
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425×200×335
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465×245×465
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485×300×655
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600×300×730
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Carton Size(D×W×H）
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490×290×410
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530×310×510
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570×390×730
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670×380×930
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N.W.(kg)
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28
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28
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45
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52
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62
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62
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68
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108
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113
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G.W.(kg)
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29
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29
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47
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60
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72
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72
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78
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121
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126
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Parameter:
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Input
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Voltage
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145V～275V
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Frequency
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45Hz～65Hz
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Output
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Voltage
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110V±2% or 220V±2%(Battery mode)
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Frequency
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50Hz±0.5 or 60Hz±0.5
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Output Waveform
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Pure sine wave
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Total Harmonic Distortion
(THD)
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≤3%
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Battery Recharge
Current
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10A（Adjustable）
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Display
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LCD
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Transer Time
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≤4ms
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Enviorment
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Noise
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≤55dB
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Temperature
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0℃～40℃
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Humidity
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10%～90%(no condense)
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Efficiency
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≥80%
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Protection
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Over-load
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Overload
exceeds 110%，automatic
shutdown in 30 secs；Overload
exceeds 120%，automatic
shutdown in 2 secs；Under
mains supply mode, it will not shutdown if overload, just keeping sound.
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short-circuit
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Output short-circuit,automatic shutdown
after keeping sound 20 secs
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battery
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high or low voltage protection
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Reverse polarity
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reverse polqrity protection(optional）
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Alarm
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A
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Without
alarm sound if work normally under mains supply mode,when mains supply cut
off, turn into battery mode,keeping sound 4 times every 30 seconds.
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B
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Keeping
sound every seconds for second time alarm of Battery low voltage; send out
sharp sound under machine fault.
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C
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Keeping
sound every seconds under Overload
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Note
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All
specifications are subject to change without prior notice
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