Category: Electrical Test & Measurement

Home -> Category: Electrical Test & Measurement

Electrical Test & Measurement

Three-Phase Transformer Turns Ratio Tester | PWR3A

Three-Phase Transformer Turns Ratio Tester - Overview

The great advantage of the Three-Phase Transformer Tester PWR3A is its simple set-up. You simply type in the vector group with the keys to set up, connect the transformer to the device, and release the measurement. All three phases are measured consecutively. All connecting and short-circuited procedures at the primary and secondary voltage sides are performed automatically before each measurement. It is also possible to measure just one phase. An adjustable set value allows an error or deviation of the measured transformation ratio to be displayed. Automatic control of the tap changer is provided. All phases and taps are measured consecutively, and the results are stored inside the instrument and transferred to a PC. The transformer-specific data can be easily programmed via a connected PC but it is also possible via the internal keyboard. The PWR3A is connected to the H.V. and L.V. sides via four connections each. It also powers the test object at a selected voltage, supplied by an internal isolating transformer. An external excitation using different voltages and frequencies is also possible.

Three-Phase Transformer Turns Ratio Tester - Features

• Ratio range from 0.75 to 20,000 (higher ratios with CVT-Ext.)
• Fully automated measurement
• Features market unique Vector Group Detection
• Measuring voltage from 8 V to 230 V
• Measuring voltage up to 5 kV by CVT-Extension: PWR3A-CVT
• Using 3-phase voltage for phase angles other than 0°/180°
• Easy to handle tap changer automatic
• Internal memory stores all dates (Reading with PWR3A-XFER)
• LC display (256 x 128 pixel) with backlight
• Easy input of vector group and measuring conditions
• USB/RS232C port to get full instrument control
• Centronics printer port or built in printer (optional)
• Robust mobile case for field use
• Factory Certificate

Datasheet

Read more
Power Quality Analyzer PQM-702

Power Quality Analyzer - Overview

The Power Quality Analyzer PQM-702 is a high-tech device providing users with features to measure, analyze and record parameters of 50/60 Hz power networks and power quality in accordance with the European Standard EN 50160. Analyzers are fully compliant with the requirements of IEC 61000-4-30:2015, Class A.

The device is equipped with five voltage measurement inputs installed as cables terminated with banana plugs marked as L1/A, L2/B, L3/C, N and PE (ground). The voltages measured by four measurement channels are up to ±1500V (the device has two voltage sub-ranges). This range may be increased by using additional external voltage transformers. Current is measured using four inputs installed on short cables terminated with probe terminals. The terminals may be connected to the following probe types: flexible claps (marked as F-1(A), F-2(A), F-3(A)) with nominal rating up to 3000 A (differing from others only by coil diameter); clamps F-1A6, F-2A6, F-3A6 with a nominal range up to 6000 A and hard probes marked as C-4 (range up to 1000 A AC), C-5(A) (up to 1000 A AC/DC), C-6(A) (up to 10 A AC) and C-7(A) (up to 100 A AC). The values of nominal measured currents may be changed by using additional transducers – for example, using a transducer of 1000:5 ratio, the user may select C-6(A) probes to measure currents up to 1000 A

Power Quality Analyzer - Features
- Power to the analyzer is supplied from tested mains (internal power supply) and is used in all types of networks from 64 V to 760V
- Emphasis on measurements at low voltage poles, due to the ease of connection
- Independent power supply socket suited for voltage measurements for transformers and DC circuits
- Remote control and data transfer through a built-in GSM modem (GPRS)
- Anti-theft feature - SMS notification in the event of position change - built-in GPS receiver
- Real-time clock synchronized to GPS protocol
- Measurements according to EN 50160
- Voltage L1, L2, L3, N, PE
  - average, minimum, maximum and instantaneous values, range to 760 V, ability to work with voltage transformers
- Current L1, L2, L3, N (four inputs)
  - average, minimum, maximum and instantaneous values, measurement current with range to 3 kA (depends on used clamp)
  - ability to work with current transformers
- Crest factor for voltage and current
- Frequency from 40 Hz to 70 Hz
- Active, reactive, distortion, apparent power, including the type of reactive power (capacitive, inductive)
- Power recording:
  - Budeanu method
  - IEEE 1459
- Active, reactive, apparent energy
- Power factor, cosφ, tgφ
- K factor (transformer overload caused by the harmonics)
- Up to 50^th harmonics for voltage and current
- Total Harmonic Distortion (THD) for voltage and current
- Short-term (P_ST) and long-term (P_LT) flicker
- Unbalance of voltage and current
- Current events detection including waveforms recording
- Current and voltage waveforms recording after each averaging period
Read more
1
Dielectric Oil Breakdown Voltage Flash Point Tester | PORTATEST A-2

Oil Dielectric Breakdown Voltage Tester - Overview

The PORTATEST A-2 Oil tester is a fully automatic tester for the determination of the dielectric breakdown voltage of the insulating liquid. Otherwise known as a flashpoint tester. It has been designed for laboratory use as well as field use for servicing and commissioning. The PORTATEST A-2 is very comfortable and easy to use. The requested testing standard may be selected via the menu. The corresponding electrode type as well as the electrode spacing will be displayed for confirmation before starting the test. After placing the test vessel with the oil sample into the test chamber, the protection lid needs to be closed. For maximum operator security, the protection lid is equipped with a security interlock key switching off the HV when opened during testing. When starting the test, sample temperature as well as a customer-specific sample number may be entered and will then be integrated into the test report printout. The testing sequence according to the selected testing standard is performed fully automatically.

Oil dielectric breakdown voltage tester - Features
- Fully automatic Oil tester for laboratory and field use during service and commissioning
- Testing voltage up to 100 kV
- Pre-Programmed for common national and international testing standards
- Up to ten free programmable user testing sequences
- Short switch-off time <1ms avoiding carbonization of the sample
- Indication of individual breakdown values, average value, and standard deviation
- Graphic-Display with backlight
- Clear operator guiding via four soft keys F1 - F4
- Input dialogue for sample temperature and sample number if required
- Multi-language menu, language selected via the Setup menu
- PC-data storage via serial interface RS232
- Glass test vessel with a lid and magnetic stirrer
- Different electrodes available (mushroom, sphere, or disc)
- Electrode spacing adjustable
- Integrated printer
- Rugged aluminium housing with shielded test chamber
Read more
Handheld Turns Ratio Tester | TRT-H

Handheld Turns Ratio Tester - Overview

The TRT-H is a battery operated, handheld, fully automatic test set designed for turns ratio, excitation current and phase shift measurements of transformers. The transformer turns ratio is determined by applying AC voltage across high-voltage winding, accurately measuring AC voltage across the corresponding unloaded transformer winding, and then displaying the ratio of these voltages. The user can enter a transformer’s nameplate voltages, so that the turns ratio deviation can be calculated. This feature eliminates any error otherwise caused by an operator’s manual calculation. It compares measured turns ratio with the nameplate ratio and prints out the % of error for each test. Applications include: Turns ratio measurement of distribution transformers; Turns ratio verification of instrument transformers; Turns ratio deviation calculation; Excitation current measurement of distribution and instrument transformers; Phase angle measurement of distribution and instrument transformers; and Polarity check of instrument transformers.

Handheld Turns Ratio Tester - Features
- Unique handheld instrument
- Extremely lightweight – only 1.4 kg / 3.1 lbs
- Measures 3 transformer parameters:
  - Turns ratio
  - Excitation current
  - Phase angle
- Single-phase test voltage up to 40 V AC
- Turns ratio accuracy up to ±0.1%
- Battery-powered
- Tests single-phase and three-phase transformers
Read more
1
Power Quality Analyzer PQM-703

Power Quality Analyzer - Overview

Power Quality Analyzers PQM-703 include all features of the PQM 702 but with extra functionality: mains signalling up to 3000 Hz, Transients up to ±6000 V, and minimal transient capturing time of 650 ns. This technically advanced product allows for comprehensive measurements of the quality of electricity, analysis and recording of power network parameters for frequencies 50/60 Hz, all in accordance with the European Standard EN 50160. Analyzers are fully compliant with the requirements of IEC 61000-4-30:2015, Class A.

The device is equipped with five voltage measurement inputs installed as cables terminated with banana plugs marked as L1/A, L2/B, L3/C, N and PE (ground). The voltages measured by four measurement channels are up to ±1500V (the device has two voltage sub-ranges). This range may be increased by using additional external voltage transformers. Current is measured using four inputs installed on short cables terminated with probe terminals. The terminals may be connected to the following probe types: flexible claps (marked as F-1(A), F-2(A), F-3(A)) with nominal rating up to 3000 A (differing from others only by coil diameter); clamps F-1A6, F-2A6, F-3A6 with a nominal range up to 6000 A and hard probes marked as C-4 (range up to 1000 A AC), C-5(A) (up to 1000 A AC/DC), C-6(A) (up to 10 A AC) and C-7(A) (up to 100 A AC). The values of nominal measured currents may be changed by using additional transducers – for example, using a transducer of 1000:5 ratio, the user may select C-6(A) probes to measure currents up to 1000 A

Power Quality Analyzer - Features
- Mains signalling up to 3000 Hz
- Transients up to ±6000 V, minimal transient capturing time is 650 ns
- All parameters meet Class A acc. IEC 61000-4-30 standard
- Measurements according to EN 50160
- Voltage L1, L2, L3, N-PE
  - average, minimum, maximum and instantaneous values
  - range to 760 V
  - ability to work with voltage transformers
- Current L1, L2, L3, N (four inputs)
  - average, minimum, maximum and instantaneous values
  - measurement current with range to 3 kA (depends on used clamp)
  - ability to work with current transformers
- Crest factor for voltage and current
- Frequency from 40 Hz to 70 Hz
- Active, reactive, distortion, apparent power, including the type of reactive power (capacitive, inductive)
- Power recording:
  - Budeanu method
  - IEEE 1459
- Active, reactive, apparent energy
- Power factor, cosφ, tgφ
- K factor (transformer overload caused by the harmonics)
- Up to 50^th harmonics for voltage and current
- Total Harmonic Distortion (THD) for voltage and current
- Short-term (P_ST) and long-term (P_LT) flicker
- Unbalance of voltage and current
- Current events detection including waveforms recording
- Current and voltage waveforms recording after each averaging period
Read more
3
Cable and Pipe Locator | LKZ-2000

Overview of Cable and Pipe Locator LKZ-2000

Easily locate cables and pipes with pinpoint accuracy. The complexity of large underground utility networks continually increases, therefor obtaining precise information on the location of specific buried cables and pipes has never been so important. To protect buried assets during ground excavation work and to support the mapping and surveying of these existing utilities.

Sonel LKZ-2000 system has unique flexible operating modes to help you easily decide the right mode for your location application for the site conditions. The intelligent utility locator monitors the signal interference levels in all available modes and recommends which to use for the best results. Saving you time and giving you increased confidence in your results.

Application for Sonel LKZ-2000 - the best system for most challenging conditions!

POWER INDUSTRY
Sonel LKZ-2000 is designed to easily trace power cables over long and short distances with pinpoint accuracy, especially in areas with high levels of electrical interference. When used in conjunction with the supplied Multi Clamp a trace signal can be safely applied to an electrically live cable. The A-Frame accessory can also be used to easily locate cable sheath faults.

CIVIL ENGINEERING AND CONSTRUCTION INDUSTRIES
The highly durable, weatherproof Sonel LKZ system has a flexible operating system to suit most site conditions and terrain, which is essential on complex and demanding civil engineering and construction sites.

RAIL INDUSTRY
Damaging communication cables can be very costly and time consuming to repair, causing major disruption to the rail network. Sonel LKZ system is designed to easily locate and trace cables in congested areas and with high levels of electrical interference.

TELECOM INDUSTRY
Tracing and locating large bundled cables, such as fibre optic cables, can be difficult and time-consuming. Sonel LKZ system's high-frequency modes are ideally suited for these types of cables, helping to improve your productivity and reliably locating all cable types. The A-Frame accessory can be used to easily locate cable sheath faults.

GAS & OIL INDUSTRIES
These can be the most potentially hazardous, costly or environmentally sensitive pipes to strike and therefore most important not to damage. Using the Sonel LKZ system’s range of low-frequency modes, locating and tracing these pipes is easy over long distances, maintaining maximum accuracy.

WATER INDUSTRY
Locating and tracing pipes can support the mapping and surveying of utilities. Using the Sonel LKZ system with our dual-frequency mode is the ideal solution for locating deep underground non-metallic sewerage and drainage pipes, that can’t be detected using standard locating technology.

Read more
1
Leakage Current Alarm Signaler | MPU-1

Leakage Current Alarm Signaler- Overview

MPU-1 measures leakage current in AC, low and medium voltage power networks. Improve safety when working with dangerous voltage lines with continuous monitoring of leakage current. Designed to indicate network safety conditions for leakage current. The device enables you to set maximum safe levels of flowing leakage current which will activate visual and audible alarms.

Leakage Current Alarm Signaler - Features
- Constant monitoring of current flowing on earthing
- Use of single clamp or two clamps simultaneously
- Work mode LED indicator
- Visual and sound alarm
- Battery level monitoring
- No DC current measurement
- Measurement with flexible clamp (Rogowski coil)
- Measurement in 50Hz or 60 Hz frequency low and medium voltage networks
- Auto-ranging
- Ergonomic handling
- MPU-1 for operation requires F1, F-2 or F-3 clamp (additional accessories)
Read more
Handheld Turns Ratio and Winding Resistance Meter | TWR-H Series

Handheld Turns Ratio and Winding Resistance Meter - Overview

This handheld, battery-operated, fully automatic test set is designed for turns ratio, phase shift, excitation current of transformers, and winding resistance measurement of transformers and other inductive objects. It can also perform demagnetisation of transformers, motors, and generators. The device generates true DC ripple-free currents. Both the injection of the current and the discharge of energy from transformer magnetic circuit are automatically regulated.

Handheld Turns Ratio and Winding Resistance Meter - Features
- Unique handheld instrument on the market
- Performs 3 different tests: Turns ratio, Winding resistance, Demagnetisation
- Single-phase test voltage up to 40 V AC
- Two DC current sources: Test current up to 2 A DC for transformer HV side, Test current up to 10 A DC for transformer LV side
- Extremely lightweight – only 1.4 kg / 3.1 lbs
- Battery-powered
- Tests single-phase and three-phase transformers
Read more
Standard Programmable Resistor SRP-10G0-10T0

Standard Programmable Resistor - Overview

The SRP-10G0-10T0 calibrator, which has a range from 10GΩ to 10TΩ, is a source of high resistance which is used as a standard in calibration and testing of analogue and digital insulation resistance meters. The selected resistance can be maintained for a long time under external direct voltage up to 10 000 V, provided that the current in the measuring circuit does not exceed 3 mA. The required resistance is set by the user using the calibrator's touch keypad or via an external PC application. The required value is set automatically thanks to the switching of a precise resistance matrix. The controlling processor calculates the required combination of resistors, ensuring adequate resistance precision.

Read more
1
Short Circuit Loop Impedance Meter MZC-305

Short Circuit Loop Impedance Meter - Overview

The MZC-305 meter is a modern, easy-to-use, safety measuring device. It is used to make measurements which help determine the electrical installation safety level. These tests help verify that if a fault occurs in an electrical installation, enough current will flow to operate the circuit breaker or fuse protecting the faulty circuit in the adequate, predetermined time.

Short Circuit Loop Impedance Meter - Features
- Loop impedance measurement resolution 0,01 Ω
- Loop impedance measurement without tripping the circuit breaker > 30 mA with resolution 0,01 Ω (100...440 V)
- Measurements possible in installations 110/190 V, 115/200 V, 127/220 V, 220/380V, 230/400 V, 240/415 V, 290/500 V and 400/690 V (range 100...750 V)
- Short circuit current indication
- Voltage measurement up to 750 V and up to 250 V with resolution 0,1 V
- Measurements using Uni-Schuko adapter or test wires 1,2; 5; 10 and 20 m
- Memory of 990 records
- USB connection with PC
- Powered by disposable or rechargeable (4xAA)
Read more
DO7 Plus Micro Ohmmeter

Micro Ohmmeter - DO7 plus - Overview

The DO7Plus is a 10A micro ohmmeter, suitable for applications within aerospace, utilities, cable or machine manufacturers or where a cooling curve is required to plot peak resistance. Sealed in an IP67 case, it is ruggedly constructed to ensure durability. This micro ohmmeter has a display length of 60,000 counts and auto averaging of forward and reverse measurement removes thermal emf differences. The DO7Plus micro ohmmeter has built in rechargeable batteries which will provide up to 1 hour of continuous use at 10A, and up to 20 hours at all other ranges. The data log memory using FRAM technology offers unlimited read/write cycles and over 10 years of data retention, without relying on internal batteries.

DO7 Plus Micro Ohmmeter - Features
- Backlit LCD graphic panel with programmable timer for battery conservation
- Qwerty Keyboard
- Temperature compensation via PT100
- Coefficients for Copper and Aluminum
- Display length of 60,000 counts
- Auto Averaging with a forward reverse measurement (removes thermal emf diff)
- Log Memory can be plotted to calculate peak resistance value at t=0
- Memory 1000 time stamped readings
- Software included to view data via download with USB, RS232
- Ruggedly constructed case IP 67 when lid is closed a d IP53 when lid is open.
- On-screen, real-time graphical plotting cooling curve facilities with peak resistance value calculator
- Reading rate of 2 readings per second
- Measuring ranges from 6mΩ - 6kΩ
- Resolution 100nΩ on 6mΩ range
- Single pulse measurement for fast resistance tests
- Continuous measurement current for inductive tests
- Full test lead continuity testing and diagnostic display
- Multilingual - display available in English, French, German, Spanish or Italian
https://www.youtube.com/watch?v=OqDCdP8Jodo

Read more