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- PJ Electronics, Inc.
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Digital High Frequency Surge Testers
C Model
These Digital High Frequency Surge Testers are the ultimate in ruggedness & durability. Fourteen / sixteen gauge steel construction and mobility on 6" heavy duty rubber wheels makes it a favorite for use in harsh industrial environments. The performance of PJ's exclusive/unique High Frequency Technology is capable of testing the integrity of any turn-to-turn insulation, including low inductance windings.
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Split Core Current Transformers
LZCK-55
Beijing GFUVE Electronics Co.,Ltd.
Outdoor waterproof current transformers are applicable for AC power system 35kV and measurement of current of power supply equipment below 10KV also can be used for microcomputer protection. This type of current transformer employs imported silicon steel which with high permeability as magnetic material, has the characteristics of Small magnetic circuit loss and can be split, its semicircular core and secondary windings employ high quality epoxy resin vacuum, casting in plastic-case(ABS or PC) which is flame retardance anti-moisture, stable performance, no maintenance.
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Power Bead Inductors
Power bead inductors are typically used in high current multi-phase voltage regulators that power processors, memory modules and high current ASICs and FPGA in a wide range of applications including servers, graphics cards, storage and data centers. The construction consists of a ferrite core assembled over a 1T or 2T winding and which allows for extremely low DCR, high peak current and low AC losses. Pulse has single phase, integrated phases and coupled inductor versions. Our high volume manufacturing enables us to produce components that are cost-effective while maintain exceptional quality and reliability.
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Transformer DC Winding Resistance Tester
HTZZ-5A / 230
Wuhan Huatian Electric Power Automation Co., Ltd.
Applicable for transformer to submit the dc resistance testproject around group in pick up and overhaul project.
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Transformer Winding Resistance Testers / TRT ? 2
TRT-2
UDEYRAJ ELECTRICALS PRIVATE LIMITED
Fast measurement: Test current 0.02A to 2A DC, Digital display of resistance and test current.
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Direct Winding Transformer Monitors
Real time comparison of calculated and direct winding temperatures
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Test Sets For Transformer Industries
Contemporary Test Sets For Transformer Industries are developed to recognize the potentially disastrous current transformer errors. They prevent the primary current from overpowering insulation and short circuits. They are used for developing a testing and maintenance plan for addressing the errors before any failure to save money and time. With these powerful test sets, they are sure to perform saturation testing to test the knee point of a signal by comparing primary and secondary windings.
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Transformer Variable Radio Tester
WABC
Wuhan Sangao Electrical Test Installations Limit Co.
Acc to IEC and Relevant national standard, In the power transformer production, transfer and user test process, Transformer ratio test is necessary project, This can be used for quality supervision of transformer factory and the use process, prevent the transformer winding inter turn short circuit, open circuit, connection error, pressure regulating switch failure or contact fault.So our company development and production of automatic ratio tester in the original basis according to the user's site using requirements , make the operation more convenient, complete function, stable and reliable data, the testing speed is greatly improved.To meet the needs of all kinds of small medium and large transformer ratio test.
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10A DIGITAL MICRO-OHMMETER
MPK-2000e
The MPK-2000e digital very low resistance ohmmeter is a portable, microprocessor controlled instrument used to accurately measure resistances of switches and circuit breaker contacts, transformer and motor windings, wire and cable samples, joints in busbars, etc., using test currents from 1mA up to 10A. It uses the Kelvin-type, four-terminals measurement principle, thus eliminating errors caused by lead and contact resistances.
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Automatic Winding Turns Tester
This tester has the advantage of high accuracy and efficiency, limited influence due to the form and size of the coil to be analyzed, and fast & easy operation thanks to the precision sensor and microprocessor that adopt the patent know-how developed by the manufacture. This tester, when in operation, does not need any further adjustment and calibration. Just connecting the clip leads to each terminal lug of the coil winding, then the tester instantly shows the exact number of the winding turns on the digital display. Unlike other similar devices, input the data of standard coil to test against is unnecessary. In this way, this tester greatly upgrades the inspection and analyzing efficiency.
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Millohm & LCR
Help prevent failures in motor windings, generators and transformers with a quick and easy resistance test using an Amprobe milliohm meter. To efficiently inspect and verify electronic components for quality control, choose an Amprobe LCR tester.
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Motor Winding Ohmmeter
RMO-M Series
The motor/generator winding resistance test is used to identify open windings, shorts between two windings, short to grounds, connection mistakes or shorted turns. This non-invasive test of winding resistance helps to pinpoint problems regarding windings in stator or rotor part of an electrical machine. Additionally, motor winding ohmmeter has the capability of performing heat run test which will show a change in windings resistance with an increase of temperature.The RMO-M series is designed as an ideal aid in preventive maintenance of electrical motors and generators. They are powerful (up to 100A of test current), portable (8 kg) and generate DC current which is completely ripple-free. This makes measurement very precise with 0,1% accuracy.Three voltage channels make measurement very easy since it is possible to obtain a value of all three winding resistances in one measurement
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DC Bias Current Power Supply
TH1775
Shenzhen Chuangxin Instruments Co., Ltd.
TH1775 is a DC Bias Current Source (or DC Magnetization Current Source) used for inductance measurement of inductors and transformer windings with DC bias current. Except for constant current output, low additional error and wide frequency response range are important for bias current inductance measurement. High frequency LCR meter could be used, when the frequency response range is wide enough. MPU controlled auto current balance technology is adopted to realize AC+DC current overlap and constant current output from 0 to ±20A. Two TH1775 can be paralleled to supply a maximum current up to 40A.TH1775 permits high frequency measurement up to 1 MHz and can be directly controlled by TH2816A, TH2817A, TH2818 and TH2819. TH1773/TH1775 with its low additional error, wide frequency response range and sweep output function is widely used in DC biased inductance measurement. TH1775 also provides a perfect solution for magnetic material analysis.
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Tester for Alternator Stator Windings and Diode Bridges
MS014
The equipment combines two devices: tester of stator windings and diode bridges. The device has small dimensions and a light weight, it was developed according to the requirements of contemporary service stations.The feature of the handset tester is diagnostics of stator windings and diode bridges with no additional testing and measuring devices.Diagnostics of stator windings is carried out through automatic identification of phase connection, detecting winding integrity and measuring the difference in phase distortion.
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Transformer Winding Resistance Meters
TWA Standard Series
The TWA standard series instruments are designed to measure the resistance of six coils and simultaneously analyze the three-phase tap changer on load of the primary and secondary transformer coils (provided by model TWA40). This is done in a single cable configuration, with test currents up to 40A. Each transformer configuration has a special measurement algorithm that is optimized for rapid stabilization of test results. The TWA instruments generate a true DC current without ripple. Both current injection and magnetic circuit energy discharge are automatically regulated.
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Highly Inductive Resistance Meter
MR 8050
With the MR 8050 resistances highly inductive Resistance Meters windings of transformers, motors and reactors can be measured. (range 100 µΩ with 0.01µΩ resolution up to 6 kΩ). The performance of the test objects can be up to 800 MVA or even more. The magnetic loading of a transformer is performed quickly using a high loading voltage (60V). This is important for time critical measurements (cooling curves). The unloading of the transformers core is very fast, very safe, as the energy is total destroyed in the MR 8050.
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UNI-T Series
Weshine Electric Manufacturing Co., Ltd
mainly used to measure the wire resistance of cables, the contact resistance ofswitches, connectors, relays, the resistance of coils, motors, transformer windings, and equipment enclosures, lightning protection belts, ground beams, structures, cabinets, steel bars, Test the connection resistance between metal components of water pipes, windows, guardrails, radiators, assembly lines, etc. It is widely used in telecommunications, electric power, meteorology, computer rooms, oil fields, power distribution lines, tower transmission lines, gas stations, factory grounding grids, lightning rods, etc.
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Electrical Safety Test Solutions
Hipot Analyzers with 500VA output rating can be used to test and analyze the withstand voltage of high power and leakage current for the products like motor stators and rotors with high parasitic capacitance. Corona detection can be used for turn-to-turn or turn-to-ground test to avoid winding insulation failure from corona discharge.
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Motor Termination Units
Since the rise time of IGBTs are in the range of a few tens of nanoseconds (between 50ns-200ns), even short cables between PWM motor drives and motors cause voltage doubling at the motor terminals due to Travelling Wave Phenomenon as in transmission lines. The insulation of motor windings are prone to failure due to high voltage spikes if necessary precautions are not sufficiently taken. RC Type Output Filter Modules reduce these high voltage spikes to protect motors by connecting to stator terminals.
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Saturable Reactor Inductors
Osborne Saturable Reactors are designed to provide a variable output voltage through the use of variable impedance connected in series with a constant impedance load. Each saturable reactor’s impedance is determined by the application of DC power to a control winding. As the level of power supplied to the control winding is increased, the saturable reactor becomes more saturated. This reduces the impedance of the AC gate winding, and increase the amount of the supply voltage that is transferred to the load. Conversely, as the power is reduced to the control winding, the reactor becomes less saturated, the gate winding has more impedance and less of the input voltage is provided to the output impedance. This approach provides excellent quality, reliability, and control when designed to match the requirements of a specific application.
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10 A portable digital micro-ohmmeter
MPK-253
The MPK-253 digital very low resistance ohmmeter is a portable, microprocessor-controlled instrument used to accurately measure resistances of switches and circuit breaker contacts, transformer and motor windings, wire and cable samples, joints in busbars, etc., using test currents from 1mA up to 10 A.
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3 Phase Voltage Extension To Turns Ratio Meter Rack
T-REX R
The Raytech three phase voltage system option T-Rex R is an optional system accessory for 3- Phase transformer ratio meter test sets designed by Raytech (i.e. TR-MARK III R). T-Rex R was designed to give Engineers and Test Technicians the ability to test the phase relationships and actual voltage ratios of transformer windings while applying three phase voltage.
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Ocean Signal RescueME PLB1 (Personal Locator Beacon)
RescueME PLB1
The RescueME PLB1 is the world's smallest 406mhz & GPS enabled PLBOperation of the rescueME PLB could not be simpler. To activate the PLB: Pull the retractable antenna out by its end tab, flip open the spring loaded cover over the activation button, hold the button for 1 second until the lights blink. Visual instructions are clearly printed on the case. When activated, the rescueME PLB1 will transmit accurate position data from its 66 channel GPS for a minimum of 24 hours while the integrated strobe light ensures maximum visibility.Ocean Signal has ensured that rescueME, like all of its other safety products, exceeds statutory requirements. RescueME PLB provides an incredible 7 year battery life, and is covered by a 7 year warranty. Even after more than 24 hours of continuous operation, and when the battery power is insufficient to transmit the satellite signal, the PLB1's homing beacon and strobe light will continue to operate. This high intensity strobe light features a molded lens to enhance the visibility of its efficient LED and it gives a powerful 1 candela light emission.Self-test of the PLB can be carried out with a simple button press with the start of test and results clearly indicated by a green flashing light. The antenna is easily extended like a normal tape measure and can be retracted using the winding mechanism on the top of the unit. This unique feature greatly facilitates user training and familiarization as it is not a one time deployable antenna similar to existing PLBs.rescueME comes with a snap-in mounting bracket and universal rubber mounting strap which can be fitted permanently or with each use. It is also supplied with a detachable flotation lanyard to accommodate all scenarios out of the box.
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Dynamic UPS
ROTOBLOC® RBT SERIES 400 - 2000 kVA
The RBT system consists of a standard synchronous generator with no special windings and a simple steel flywheel. The low speed shaft extends bearing life and reduces maintenance. The ROTABLOC® machine is very robust as critical functions do not use fragile components such as power electronics, power capacitors, electro-chemical batteries, active magnetic bearings, electro-mechanical or mechanical friction clutches.
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Potential Transformer Test Set
Supreme Instrument Laboratories
The two voltage vectors, one from Standard Potential Transformer and the other from the Potential Transformer under test energies the high permeability magnetic core and then associated windings try to annual the residual magnetism which occurs due to error. The differential vectors will be proportional to phase error and ratio error magnitudes.
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Transformer Winding Resistance Meters
Vanguard Instruments Company, Inc.
The TRM-40 is Vanguard Instruments’ third generation transformer winding resistance meter. The TRM-40 is designed specifically to measure DC resistance values of transformer windings, rotating machine windings, or any dc resistance of an inductive device.
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Digital Surge Tester
25KV, 30KV & 40KV
The Digital Surge Tester is designed specifically to test the coils and windings of High range AC Rotating machines ranging up to 13.8KV. The Surge Tester has an Embedded Industrial PC with 8 inch Touch screen Display and software to Store, Recall and Print the Test Reports.
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Motor Starting & Control Resistors
Motor Starting Resistors are used to reduce the voltage at the motor terminals and also decrease the starting current. Motor Starting Resistors are necessary because the self resistance of a motor armature is very low. When the voltage is first applied, excessive current will flow. For limiting this current, since there will be no resisting back electromotive force (emf),some series resistance can be added to the armature windings.
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Inductor Tester
Koyo Electronics Industries co., ltd
Especially designed for testing insulation of chip power inductor coil. Applicable to choke coils, motor coils, and coil with less winding, too.
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Three-Phase Transformer Winding Resistance Meters
TWA Advanced Series
TWA Advanced series is the latest DV Power solution for three-phase transformer winding resistance measurement and tap changer analysis. They are capable of testing six transformer windings with a single cable connection, as well as three-phase automatic transformer demagnetization. It has the option of the automated test mode, where the instrument operates the tap changer without operator input (minimizing the risk of human error) and records winding resistance results based on pre-selected stabilization criteria.The unique DVtest method of tap changer analysis 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, together with the measurement of tap changer motor current which detects 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 simultaneously on three phases. It can also be performed together with the winding resistance test in all tap positions.A unique advantage of TWA Advanced instruments 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 speed up the testing– for example, it enables the operator to perform 33 measurements instead of 99 on a tap changer with 33 tap positions.TWA500 is equipped with a large 10.1” graphical touch-screen display, while TWA400 has a 7” graphical touch-screen display. Besides making the interface much more user-friendly compared to older winding ohmmeters, it also enables certain test options that were previously available only with DV-Win software. The most important among them are DVtest, tap changer motor current measurement, “Heat Run” test, test templates, and automatic test mode.
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Motor Stator Tester
DZ900S
Shanghai Aoboor Electric Co., Ltd.
Test objects include stators for single-phase AC motors. three-phase AC motors, servo motors, stepper motors, brushless motors series excitaion motors, hub motors, shaded pole motors as well asspecial winding stators.
