Here's how the low pass filter makes it possible.A healthy dc bus is a must for a properly operating motor drive. The measurements in the following procedure are designed to be made on a 480 volt 3 phase drive control at the control panel terminal strips. Nobody takes inaccurate measurements on purpose, but it's easy to do, especially when working in a high energy, noisy environment like an ASD. Output voltage reading without using the low pass filter.Figure 2.
All of these measurements are especially helpful when taking measurements at the motor location when the drive's displays are not in view.Before taking any electrical measurements, be sure you understand how to take them safely. Your recently viewed items and featured recommendations To measure the DC bus voltage:Click on a category to view a selection of compatible accessories with the Fluke 115 True RMS Digital Multimeter.Ideal for general purpose electrical and electronic test requirements, this True RMS digital multimeter also provides simple, one-handed operation and compact design for field service technicians. A significant unbalance may lead to erratic drive operation and should be corrected when discovered.On the flip side, a regular True RMS multimeter can't reliably read the output side of a pulse width modulated (pwm) motor drive, because the ASD applies pulse width modulated nonsinusoidal voltage to the motor terminals.
The Fluke 115 displays True-RMS voltage and current readings with 6000 count resolution, tests diodes, frequency, continuity and capacitance and provides min max average readings to record signal fluctuations. A lot of time and money can be wasted replacing perfectly good parts when the problem is simply a loose connection. The most efficient troubleshooting procedure begins at the motor and then works systematically back to the electrical source, looking for the most obvious problems first. Only 2 left in stock - order soon. With the incorporated selectable low pass filter, allows troubleshooters to take accurate voltage, current and frequency measurements on the output side of the drive at either the drive itself or the motor terminals. FREE Shipping by Amazon. Output current reading without using the low pass filter.Figure 6. Output voltage reading with low pass filter enabled.Figure 3. For a 480 volt input, the DC bus should be approximately 679 VDC. Also make sure to use the appropriate personal protective equipment (PPE) for your specific working environment and measurements. The category rating and voltage limit are typically found on the front panel, at the input terminals. Its AutoVolt
2:04.
These procedures would also be valid for lower voltage 3 phase drives powered by either single or 3 phase supply voltages. The measurements in the following procedure are designed to be made on a 480 volt 3 phase drive control at the control panel terminal strips. Until now, noise issues have prevented accurate readings using hall effect type clamps. Likewise, choosing the right test tools for troubleshooting the drive, the motor, and the connections is of utmost importance. *Es sind nicht alle Modelle in allen Ländern erhältlich. The voltage rating is the maximum continuous working voltage the instrument is capable of measuring. Dual-rated CAT IV 600V and CAT III 1000V.
The DC bus is typically labeled as DC+, DC- or B+, Bon the drive terminal strip. If at all possible, never work alone.ANSI and the International Electrotechnical Commission (IEC) are the primary independent organizations that define safety standards for test equipment manufacturers. 4.0 out of 5 stars 8. The low pass filter also allows for accurate current measurements when used with Hall-effect type clamps. To measure the DC bus voltage:Click on a category to view a selection of compatible accessories with the Fluke 115 True RMS Digital Multimeter.To ask our Fluke experts a question please include your contact details.
Ended: 21 Jun, 2020 21:56:47 BST. As you go, take care to take accurate measurements. $44.00. Wenden Sie sich bitte an Ihren Fluke Vertriebspartner. If the bus voltage is incorrect or unstable, the converter diodes or capacitors may be starting to fail. The DC bus is typically labeled as DC+, DC- or B+, Bon the drive terminal strip. But until now, there hasn't been a digital multimeter on the market able to accurately measure ASDs. Its AutoVolt capability automatically switches to measure AC or DC voltage, whichever is present. 89 ($60.95/kg) Get it as soon as Tue, Jul 21. For these tests the motor is running at 50 Hz.To measure the ac voltage supply to the input side of the drive at the drive:Measuring the input current generally requires a current clamp accessory. Output frequency (motor speed) without the low pass filter.Figure 4. Compact true-rms meter for accurate electrical installation and troubleshootingThe Fluke 110 is a versatile multimeter for electrical measurements and troubleshooting. Your recently viewed items and featured recommendations Once again, regardless of clamp type, insure that all readings are within 10% of each other for proper balance.For motors that pull at least 20 amps of running current, motor speed can be determined by taking a frequency measurement with current clamps. Incorporates a selectable low pass filter* that allows for accurate drive output measurements that agree with the motor drive controller display indicator.
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Fluke 110 True RMS Multimeter