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VLF

frequency operates at 3–30 kHz. AKA: Very Low Frequency

See Also: Low Frequency, ELF


Showing results: 91 - 103 of 103 items found.

  • Power Phase Converter Single phase 220VAC to 3 phase 380VAC Converter

    SDT-40KW - Zhejiang Sandi Electric Co., Ltd

    SANDI SDT series single-phase to three-phase converter, adopted SVPWM modulation control technology, which can convert ordinary single-phase power to industrial three-phase power. After through SDT series single-phase to three phase converter power conversion, the three-phase power output is standard pure sine wave, the harmonic distortion rate (THD) is less than 2%, totally meet the national standards of three-phase power quality, applicable to all types of load.The SDT series single-phase to three-phase converter can solve production inconvenience because of some areas with the three-phase electric power restrictions, also solved some user requirements that can?謒?apply for the three-phase electric because of space limitation.Features1) Using the fifth generation efficient IPM intelligent module from Japanese Mitsubishi, high efficiency and stable performance. It with powerful protection function, the protection for short circuit, over load, over temperature is more safe and reliable. It's service life can up to 15 years or more.2) Two kinds of start mode: Reduction Voltage Start and Variable Frequency Start. Customers can set start mode according to the type of their load. This function is very convenient for users and also reduce frequency converter?謒?usage, which reduced the cost of equipment investment, easy to connect wires and control.3) Pure sine wave output with good transient response less than 50ms, waveform distortion is very little, higher conversion efficiency and stable output voltage.4) Adopted low frequency transformer which ensure the input voltage and output voltage are completely electrical isolated to avoid interference.5) Using SVPWM space vector algorithms, high conversion efficiency, high instantaneous power and low losses conversion efficiency up to 94%.6) Output AC Power is suitable for all types of electric appliances, electric tools, electric motors etc. higher capability of driving load.7) Converter has the function of filtering the grid disturbance and interference at the same time, which is a good performance of stabilized voltage and frequency power, to provide a more stable and pure power supply environment for the backend devices.8) Output perfect protection function, with output over-voltage, overload, short circuit, over temperature, self-diagnosis protection and other protection.9) High conversion efficiency, high instantaneous power and low load loss.10) The input voltage, output voltage, frequency and phase can be custom made.SpecificationModel SDT-40KWIsolation mode Low Frequency TransformerAC InputRated voltage (Vac) 240V single-phase 60HZVoltage range (Vac) 190-270VInput current (A) 167AAC OutputRated power (KW) 40KWRated voltage 240V ± 2%Output phases Three-phase with Neutral wires (L1, L2, L3 + N)Rated current (A) 96AOutput frequency 60Hz ±0.05 (50HZ can be set)Waveform Pure sine waveVoltage accuracy Load balancing≤1%、Unbalanced load≤5%Waveform distortion rate (THD) Linear load≤2%、Nonlinear load≤3%Dynamic Response 5%,≤50ms (load 0~100%)Power Factor (PF) 0.99Inverter Efficiency ≧85%Electrical insulation properties 2000Vac、1 MinuteProtection FunctionOverload Ability 150%、10sProtection Input under voltage, overvoltage, output over-current, short circuit, overheating etc.Display LCD+LEDMethod of working Working continuouslyCooling method Intelligent fan coolingShort-circuit protection No automatic recovery, need to restart the machineWorking Environment & Mechanical dimensionDegree of protection IP20 (indoor)Working Altitude(m) ≤3000mWorking temperature (℃) -20~+50℃Relative humidity (℃) -25~+85℃Noise (1 meter) ≤60dBReference size: (W x D x H) 750×750×1480mmReference net weight (Kg) 340Kg

  • DC Block, 700 kHz to 50 GHz

    N9399F - Keysight Technologies

    The Keysight N9399F DC block offers a new level of DC blocking with performance specified from 700 kHz to 50 GHz. This DC block features a broad frequency range, excellent return loss, very low insertion loss and excellent temperature stability.

  • DC Block, 700 kHz to 26.5 GHz

    N9399C - Keysight Technologies

    The Keysight N9399C DC block offers a new level of DC blocking with performance specified from 700 kHz to 26.5 GHz. This DC block features a broad frequency range, excellent return loss, very low insertion loss and excellent temperature stability.

  • Digital RCD Tester

    1112 EL - Standard Electric Works Co., Ltd

    ● Microprocessor-controlled.● Very low consumption.● 50Hz and 60Hz operation.● Accurate digital readout of disconnection time.● Over temperature protection.● Over voltage protection.● Fuse protection.● Zero crossing circuitry permit testing at 0° or 180°.● Auto power off. ● Backlight function. ● Wiring polarity indicator.● Measure voltage between Line and Earth before testing.● Frequency measurement indication.

  • Digital RCD Tester

    1612 EL - Standard Electric Works Co., Ltd

    ●Microprocessor-controlled●Extra large LCD (78 × 67mm)●Very low power consumption●50Hz and 60Hz operation●Accurate digital readout of disconnection time●Over temperature protection●Over voltage protection●Fuse protection●Zero crossing circuitry permits testing at 0° or 180°●Auto power off●Backlight function●Wiring polarity indicator●Measures voltage between Line and Earth before testing●Frequency measurement indication

  • Digital RCD Tester

    1113 EL - Standard Electric Works Co., Ltd

    ● Microprocessor-controlled.● Very low consumption.● 50Hz and 60Hz operation.● Accurate digital readout of disconnection time.● Over temperature protection.● Over voltage protection.● Fuse protection.● Zero crossing circuitry permit testing at 0° or 180°.● Auto power off. ● Backlight function. ● Wiring polarity indicator.● Measure voltage between Line and Earth before testing.● Frequency measurement indication.

  • Digital RCD Tester

    8012 EL - Standard Electric Works Co., Ltd

    ● Microprocessor-controlled.● Extra large LCD(78 × 67mm).● Very low consumption.● 50Hz and 60Hz operation.● Menu-driven.● Accurate digital readout of disconnection time.● Over temperature protection.● Over voltage protection.● Fuse protection.● Zero crossing circuitry permit testing at 0° or 180°.● Auto power off.● Auto off and off override.● Wiring polarity indicator.● Measure voltage between Line and Earth before testing.●Frequency measurement indication.

  • Digital RCD/RCCB/GFC/ELCB Tester

    4112 EL - Standard Electric Works Co., Ltd

    ● Microprocessor-controlled.● 2 Lines × 16 Characters LCD.● Very low consumption.● Menu-driven.● Accurate digital readout of disconnection time.● Automatic data hold function.● Zero Crossing Circuitry permit testing at 0° or 180°.● Disconnection Phase Polarity Shown on LCD.● Auto off and off override.● Polarity Trip indicator (Positive or Negative Phase).● Wiring polarity indicator.● Measure voltage between line and earth before testing.● Indicates frequency of voltage L-E.

  • Digital ELCB (RCD) Tester

    2712 EL - Standard Electric Works Co., Ltd

    ● Microprocessor-controlled.● 2 Lines × 16 characters LCD.● Very low consumption.● 50Hz and 60Hz operation.● Menu-driven.● Accurate digital readout of disconnection time.● Automatic data hold function.● Over temperature protection.● Over voltage protection.● Fuse protection.● Zero crossing circuitry permit testing at 0° or 180°.● Disconnection phase polarity shown on LCD display.● Auto off and off override.● Polarity trip indicator (positive or negative phase)● Wiring polarity indicator.● Measure voltage between Line and Earth before testing.● Frequency measurement indication.

  • Digital ELCB (RCD) Tester

    1812 EL - Standard Electric Works Co., Ltd

    ● Microprocessor-controlled.● 2Lines × 16 Characters LCD.● Very low consumption.● Menu-driven.● Accurate digital readout of disconnection time.● Automatic data hold function.● Zero Crossing Circuitry permit testing at 0° or 180°.● Disconnection Phase Polarity shown on LCD display.● Auto-off and off override.● Polarity Trip indicator (Positive of Negative Phase).● Wiring polarity indicator.● Measure voltage and frequency between Line and Earth before testing.

  • handheld digital spectrum analyzer

    2.4G - Seeed Technology Inc.

    RF Explorer is a handheld digital spectrum analyzer, aimed to provide a very affordable tool for work in all ISM popular frequency bands. It is based on a highly integrated frequency synthesizer which offers high performance, compact size, low consumption and low cost. It has been designed to be used outdoor and indoor, and works nice with a PC connected for extra functionality using standard mini-USB 2.0 connector.

  • handheld digital spectrum analyzer

    433M - Seeed Technology Inc.

    RF Explorer is a handheld digital spectrum analyzer, aimed to provide a very affordable tool for work in all ISM popular frequency bands. It is based on a highly integrated frequency synthesizer which offers high performance, compact size, low consumption and low-cost. It has been designed to be used equally well outdoor and indoor, and can be connected to a Windows PC using standard mini-USB for additional features and higher display resolution.

  • handheld digital spectrum analyzer

    868M - Seeed Technology Inc.

    RF Explorer is a handheld digital spectrum analyzer, aimed to provide a very affordable tool for work in all ISM popular frequency bands. It is based on a highly integrated frequency synthesizer which offers high performance, compact size, low consumption and low cost. It has been designed to be used outdoor and indoor, and works nice with a PC connected for extra functionality using standard mini-USB 2.0 connector.

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