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  • ELT STALKER Vector-finder

    VF-121 - National RF, Inc

    The Vector-Finder Types VF-121 and VF 121A are unique in the Vector-finder series of direction finding antennas. They incorporate a proven design, electro statically shielded loop sensing element with modern solid state low noise analog and digital technology to allow detection and location of aircraft band signals. Both the VF-121 and the VF 121A incorporate a unique digital modulator which allows the user to more easily home-in on unmodulated carriers. Such cases occur at airports when transmitter may be accidentally keyed on during aircraft overnight layovers. The VF-121 is specifically designed to be used on airport premises where signal strengths are high. To compensate for very strong signals, an integral attenuator is also incorporated to allow the user to operate the unit close-in to aircraft. The VF-121A differs in that a high gain, low-noise preamplifier is utilized with the sensing element in order to hunt signals that may be weak or at a distance. The unit is ideally suited for the location of ELT transmitters in the field. Both units are tunable over the 118 MHz to 130 MHz aircraft frequencies and interface directly to the user’s aircraft band receiver or transceiver via the antenna jack. With the antenna system connected to the receiver, the user will hear the desired signal. If the signal is unmodulated, the digital modulator will generate a tone on the carrier. When the handheld unit is rotated about, an audible null on the received signal or the generated tone will be heard. This null aligns with the axis of the equipment case and represents the direction of the received signal. This direction may be read from the black dial compass mounted on the top of the enclosure. As the response is bi-directional, triangulation may be used to determine the true bearing when the true direction is not known.

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  • Transformer Turns Ratio Testers

    IBEKO Power AB

    Transformer turns ratio testers from TRT series are DV Power instruments mainly designed for the measurement of power transformer turns ratio. Also, they measure transformer excitation current and phase shift. Special tests, such as automatic vector group detection and magnetic balance, can be performed on three-phase transformers and three-phase autotransformers.All models, except TRT03 series, have a built-in true three-phase power source, which is necessary for testing turns ratio of transformers with special configurations, such as phase-shifting, rectifier, arc-furnace, traction transformers, etc.DV Power turns ratio testers can output various test voltages for different applications. From the extremely low test voltage of 1 V AC that enables turns ratio verification of the majority of current transformers, up to the highest test voltage of 500 V AC that provides the most accurate turns ratio testing of power transformers used in power generation and transmission. By using the external booster, test voltage increases up to 5 kV AC in order to successfully test capacitive voltage transformers.All DV Power turns ratio testers have a built-in tap changer control unit. Because of that, it is possible to control the on-load tap changer (OLTC) directly from the device. In order to make the most out of this feature, the instrument and included DV-Win software can be programmed to do everything automatically – running turns ratio tests, changing OLTC tap positions, and saving results. This option significantly facilitates and shortens the turns ratio testing time.TRT turns ratio testers use the same set of cables as three-phase winding ohmmeter & tap changer analyzers from the TWA series. Consequently, it enables one-time cable setup for performing eight tests:turns ratioexcitation currentphase anglemagnetic balancevector group detectionwinding resistanceon-load tap changer DVtestand demagnetization.

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  • Turns Ratio Testers

    TRT Standard Series - IBEKO Power AB

    When it comes to choosing a transformer turns ratio tester, TRT Standard series offers some of the most advanced instruments with LCD display out in the market. Each model measures transformer excitation current and phase shift performs automatic vector group detection and magnetic balance on three-phase transformers and three-phase autotransformers. Furthermore, they have a built-in true three-phase power source. Because of that, TRT Standard instruments can test transformers with special configurations, such as phase-shifting, rectifier, arc-furnace, traction transformers, etc.The instruments can output test voltages from 1 V AC to 250 V AC, depending on the chosen model. High test voltage of 250 V AC provides more accurate turns ratio testing compared to other turns ratio testers on the market and extremely low test voltage of 1 V AC enables turns ratio verification of current transformers.TRT Standard series consists of:TRT03 Models (TRT03A, TRT03B, TRT03C) – single-phase voltage up to 100 VTRT3x Models (TRT30A, TRT30B, TRT30C, TRT33A, TRT33B, TRT33C) – single and true three-phase voltage up to 100 VTRT63 Models (TRT63A, TRT63B, TRT63C) – single and true three-phase voltage up to 250 VMore about models differences can be found under the downloads tab, in brochures and comparison sheets.A user can create test templates using the DV Win software and store them in the PC’s memory for later use when in the field.TRT Standard series models have a built-in tap changer control unit. Consequently, it enables remote control of an on-load tap changer (OLTC) directly from the tester. In order to make the most out of this feature, the DV-Win software can be programmed to do everything automatically – running turns ratio tests, changing OLTC tap positions and saving results. This option, especially in combination with test templates, significantly facilitates and shortens the turns ratio testing time.

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  • Three-Phase Transformer Winding Resistance Meters

    TWA Standard Series - IBEKO Power AB

    When it comes to winding resistance measurement on three-phase power transformers and autotransformers, TWA Standard series offers some of the most technically advanced instruments with LCD display in the market. Both models are capable of testing six transformer windings with a one-time cable connection, as well as three-phase automatic transformer demagnetization. The stored magnetic energy is safely automatically discharged at the end of the test. The built-in tap changer control unit enables automated test mode, where the instrument operates the tap changer without operator input and records winding resistance results based on pre-selected stabilization criteria. This option makes the operator’s job significantly easier.Both models can output test currents from 5 mA to 25 A DC for the purpose of winding resistance measurement. TWA40D has a special test mode for checking the synchronization of on-load tap changers with three phases simultaneously tested in parallel, in which the total test current can rise to up to 40 A DC.TWA40D has additional advantages when it comes to non-intrusive tap changer analysis. The unique DVtest method enables checking the moving contacts of on-load tap changers during the transition, measuring the transition time, detecting open circuits, and many other types of faults. It is performed with 0.1 ms sampling rate, simultaneously with the measurement of tap changer motor current which helps with the detection of motor and mechanical issues. A special proprietary algorithm is used for testing tap changers connected through a built-in series (booster) transformer. The DVtest can be performed either on one phase or on three phases simultaneously. It can also be performed as an additional test simultaneously with the winding resistance test in all tap positions.An additional unique advantage of TWA40D is the capability of simultaneously testing the winding resistance of all three phases of a three-phase transformer (connected in a YN configuration). This can significantly shorten the total testing time – for example, it enables the operator to perform 33 measurements instead of 99 on a tap changer with 33 tap positions.The test leads for TWA three-phase transformer winding ohmmeters are interchangeable with the TRT turns ratio testers, which means that both sets of tests can be performed with a single test lead connection to the power transformer terminals.

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  • Turns Ratio Testers

    TRT Advanced Series - IBEKO Power AB

    TRT Advanced series is the newest DV Power solution for transformer turns ratio measurement. Besides its main application, each turns ratio tester from this series also measures transformer excitation current and phase shift. Furthermore, all models perform automatic vector group detection and magnetic balance on three-phase transformers and three-phase autotransformers. They have a built-in true three-phase power source. For that reason, they can test transformers with special configurations, such as phase-shifting, rectifier, arc-furnace, traction transformers, etc.The instruments can output test voltages from 1 V AC to 500 V AC, depending on the model. With the highest test voltage 500 V AC, TRT500 provides the most accurate turns ratio testing of power transformers used in power generation and transmission. The output test voltage of TRT500 can be boosted to 5 kV AC using the external CVT20 extension transformer. This application is specially designed for testing turns ratio of capacitive voltage transformers. The other three models, TRT400, TRT250, and TRT100 can output up to 400 V, 250 V, and 170 V respectively. The low test voltage of 1 V AC enables turns ratio verification of current transformers.TRT500 is equipped with a large 10.1” graphical touch screen display. Other models, (TRT400, TRT250, TRT100) have 7” graphical touch screen display. Besides making the interface much more user-friendly compared to older turns ratio testers, it also brings certain options that were previously available only with DV-Win software. The most important are test templates and automatic test mode. Users can simply create test templates, store them in the instrument’s memory, and load when in the field with just a few clicks.This turns ratio test set, as well as all other DV Power turns ratio testers, has a built-in tap changer control unit. It enables remote control of an on-load tap changer (OLTC) directly from the instrument. In order to make the most out of this feature, the instrument can be programmed to do everything automatically – running turns ratio tests, changing OLTC tap positions, and saving results. This option, especially in combination with test templates, significantly facilitates and shortens the turns ratio testing time. Automatic test mode minimizes human errors, which makes the measurement more reliable.

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  • All in one system 32KWH LiFePO4 Lithium Battery with AC Charger and 15KW Inverter for mobile vehicle application

    SPVLI-32KWH-INV15KW - Zhejiang Sandi Electric Co., Ltd

    Our All in one system 32KWH LiFePO4 Lithium Battery with AC Charger and 12-15KW 120/240V Inverter for mobile vehicle application ESS including LiFePO4 Lithium Battery with BMS, off grid pure sine wave inverter, AC/DC charger.All-in-one design, high integration and space saving installation；Using high-performance lithium iron phosphate cells, laser welding, good cell consistency, designed service life of more than 10 years； Charging and discharging are controlled separately, which is convenient and reliable to control charging and discharging. The discharge port will not be disconnected when over-charging, and the charging port will not be disconnected when over-discharging, the system has good stability；Master-slave mode, passive equalization, can manage the equalization resistance, can set the equalization start voltage difference, and monitor the equalization resistance temperature, more intelligent and safe, and reduce the impact of barrel effect on system energy storage；BMS adopts NXP(USA) automotive-grade high-performance chips, with strong anti-interference, good reliability and wide temperature range；CAN2.0 communication interface, has the advantages of strong real-time performance, long transmission distance, strong anti-electromagnetic interference ability；System parameters can be set through the host computer, such as fan start/stop temperature, charger maximum current setting, charge and discharge current correction, SOC correction, with insulation leakage detection function to prevent oil leakage and short circuit of the cell；Integrate Solar charge controller or AC charger optional, BMS communication control, more safe and reliable;Cell temperature management, can be automatically controlled with the air conditioner heater according to the cell condition to make the cell works at the most suitable temperature, and can be linked with the fire protection system as neededModel SPVLI-30KWH-INV12KWIsolation mode Low Frequency TransformerInverter PartBattery Input Rated Voltage (Vdc) 307VDC Voltage range (Vdc) 278-400VAC Output Rated output power 12KW Output waveform Pure Sine Wave Rated Voltage 120/240VAC Phases Split phase + N + PE Rated current (A) 50A(Phase Current) Frequency 60Hz Power Factor (PF) >0.95 Inverter Efficiency >92% Display LCD Overload Ability 150%, 35 secondsAC-DC Charger PartAC Input Voltage range(Vac) 180-240VacDC Output Rated voltage(Vdc) 330Vdc Rated current(A) 20ALithium Battery PartCell/Number 105AH/96PCSRated voltage 307VMax charge current 20AMax discharge current 100ACharge temperature range 0℃ ~ 50℃Discharge temperature range -20℃ ~ 50℃Cell charge end voltage 3.6VCell discharge end voltage 2.7VProtection Function Protection Input reverse polarity, under voltage, over voltage, output over-current, short circuit, overheating etc. Cooling method Fan-cooledDegree of protection IP20(indoor)Mechanical Dimension Depth* Width * Height 645x891x767mm Weight (Kg) 378Kg

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  • 76kWh Lithium Battery 384V 200AHSolar Energy Storage LiFePO4 battery System

    SPVLI-76KWH - Zhejiang Sandi Electric Co., Ltd

    SANDI ESS lithium battery system is composed of lithium battery modules, BMS system, PV charge controller, AC/DC Charger, central control unit CCU, temperature detector, integrated structure and other parts; the solar panels in the system are battery storage and power for output; BMS module completes the detection and control of voltage, current, temperature, SOC, SOH and charging and discharging related parameters of power battery pack; PV controller and inverter realize bidirectional AC/DC function to meet the charging and discharging conversion demand of power battery pack; each detector is used to monitor the ambient temperature in real time to ensure the safety of the system.Features1. Standardized components, modular architecture, easy for expansion2. High energy density, small footprint, short construction period, strong environmental adaptability3. Battery module within the layered stack design, with more than 10 years of long design life4. Long Cycle Life LiFePO4 Lithium ion Battery system from 20KWH-500KWH optional5. The use of international advanced Mitsubishi IPM module and intelligent power module, with high power fast adjustment capability6. BMS battery management system with SOC automatic calibration and high current active balance function, combined with the perfect operation control and management strategies to achieve accurate and efficient management7. The combination of software and hardware protection, with alarm protection and automatic diagnostic functions, improve the protection strategy to ensure safe and efficient operation of the system8. Product communicates with the monitoring platform in real time through RS232, CAN communication interface, and reports various records in time to ensure real-time monitoring of the battery pack of the monitoring platform9. PV charge controller adopts three charging stages (buck charging, equalize charging and float charging) which can maximize the utilization of PV modules and batteries10. Colorful LCD display all module working information and statusSpecificationModel SPVLI-76.8KWHType of cell LiFePO4 (Lithium iron phosphate)Battery configuration 3.2V 200AH 120PCSRated capacity (KWH) 76.8kwhNominal capacity (AH) 200AHNominal voltage (VDC) 384VOperating voltage range (VDC) 312-438VRecommended Charge Voltage (VDC) 420VRecommended discharge cutoff voltage (VDC) 360VRecommended charge current(A) 100AMax Charge Current (A) 200ARecommended discharge current (A) 100AMax Discharge Current (A) 200ACharge temperature range 1~45℃Discharge temperature range -10～45℃Solar Charge Controller InputMaximum. Input voltage of solar array（Vdc） <750VdcBattery system voltage 384VDCMaximum power of solar array 40KWMaximum charge current（A） 100AEqualization charging voltage (Vdc) 426VEqualize charging recovery voltage (Vdc) 405.6VOver voltage disconnect voltage (Vdc) 438VOver voltage recovery (Vdc) 432VWorking temperature -20~50℃Protection level IP20Communication interface CAN2.0, BMSDisplay 5" LCD, EnglishCooling system Fan coolingWorking Altitude (m) ≤3000mReference Weight (Kg) 920KgReference size (W*D*H mm) 900*1100*1700mm

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  • Lithium battery 128kWh Lifepo4 Battery pack 280Ah with BMS for Solar Energy Storage System

    SPVLI-128kWh - Zhejiang Sandi Electric Co., Ltd

    ESS lithium battery system is composed of lithium battery modules, BMS system, PV charge controller, AC/DC Charger, central control unit CCU, temperature detector, integrated structure and other parts; the solar panels in the system are battery storage and power for output; BMS module completes the detection and control of voltage, current, temperature, SOC, SOH and charging and discharging related parameters of power battery pack; PV controller and inverter realize bidirectional AC/DC function to meet the charging and discharging conversion demand of power battery pack; each detector is used to monitor the ambient temperature in real time to ensure the safety of the system.1. Standardized components, modular architecture, easy for expansion2. High energy density, small footprint, short construction period, strong environmental adaptability3. Battery module within the layered stack design, with more than 10 years of long design life 4. Long Cycle Life LiFePO4 Lithium ion Battery system from 20KWH—500KWH optional5. The use of international advanced Mitsubishi IPM module and intelligent power module, with high power fast adjustment capability6. BMS battery management system with SOC automatic calibration and high current active balance function, combined with the perfect operation control and management strategies to achieve accurate and efficient management7. The combination of software and hardware protection, with alarm protection and automatic diagnostic functions, improve the protection strategy to ensure safe and efficient operation of the system8. Product communicates with the monitoring platform in real time through RS232, CAN communication interface, and reports various records in time to ensure real-time monitoring of the battery pack of the monitoring platform9. PV charge controller adopts three charging stages (buck charging, equalize charging and float charging) which can maximize the utilization of PV modules and batteries10. Colorful LCD display all module working information and statusPerformance characteristics：Small size and light weight, Maintenance-free；Environmental protection and pollution-free materials, no heavy；Accurately estimate the state of charge of the battery pack, that is, the remaining power of the battery, to ensure that the power of the battery pack is maintained within a reasonable range；Built-in BMS management system with comprehensive protection and monitoring control functions；5" LCD screen display, easy to operate, can check the temperature, voltage, working status, discharge current, dynamic and static SOC algorithm of a single cell, local display of alarm info, alarm level distinction, accurate positioning of abnormal cells；Main control MCU can be centrally controlled and manage peripheral settings (AC charging module, inverter module, solar charging module) to adjust the charging current and voltage of peripheral devices according to the battery charging curve, making the system more reliable；BMS battery management system, with SOC automatic calibration and high current passive balance function, combined with perfect operation control and management strategy, to achieve accurate and efficient management；EMS energy management system, BMS with solar controller/AC charger, inverter centrally manages charge and discharge, effectively controls the charge and discharge current within the cell usage conditions, protects the cell and extend its service life；SpecificationLithium battery 128kWh Lifepo4 Battery pack 280Ah with BMS for Solar Energy Storage SystemModel SPVLI-128KWHType of cell LiFePO4 (Lithium iron phosphate)Battery cell configuration 3.2V 280AH 144PCSRated capacity (KWH) 128kwhNominal capacity (AH) 280AHNominal voltage (VDC) 460VOperating voltage range (VDC) 375-540VRecommended Charge Voltage (VDC) 504VRecommended discharge cutoff voltage (VDC) 382VRecommended charge current(A) 140AMax Charge Current (A) 280ARecommended discharge current (A) 140AMax Discharge Current (A) 280ACharge temp range 1~45℃Discharge temp range -10～45℃MPPT Solar Charge Controller InputMaximum. Input voltage of solar array（Vdc） <900VdcBattery system voltage 460VDCMaximum power of solar array 64KWMaximum charge current（A） 140AEqualization charging voltage (Vdc) 511.2VEqualize charging recovery voltage (Vdc) 486.72VOver voltage disconnect voltage (Vdc) 525.6VOver voltage recovery (Vdc) 518.4VWorking temperature -20~50℃Protection level IP20Communication interface CAN2.0, BMSDisplay 5" LCD, EnglishCooling system Fan coolingWorking Altitude (m) ≤3000mReference Weight (Kg) 1530KgReference size (W*D*H mm) 1200*1120*1950mm

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