Application Notes
Power Measurement

Isolation / Temperature / Pulse / Strain Gauge / Potentiometer / AC
Pneumatic / Function / Power Supply / Alarm / Power Mesurement
Trend & Log/Communication / Surge Protection / Other Topics

Application
  • Multi Power Monitor 53U Series
– Automotive Supplier Able to Detail Energy Usage –

030027 What is an effective or a root mean square value of an alternating current and of an alternating voltage?
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030028 What is average power of an AC circuit?
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030029 What is the electric power in an electric circuit with a pure resistance?
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030030 How can the electric power of an electric circuit with resistance and inductance be calculated?
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030031 Why is a three-phase alternating current used often for electric devices?
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030032 What is bi-directional power flow?
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030033 Why does phase difference occur? What is power factor?
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030034 Why does waveform get distorted?
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030035 What does the CT protector (M-System model CTM) that is installed onto the socket of the transmitter do?
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030036 The display of the current meter on our control panel differs from that of a digital indicating tester. The current meter receives the signal from a CT transmitter. Why does the difference occur?
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030037 What is the two-wattmeter method that is suitable to unbalanced load in measurement of three-phase power?
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030038 Can we obtain integrated power with a power transducer?
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032020 We want to measure active power in 3-phase/3-wire, balanced system, with single current transformer, not two.
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032021 Combination of DCS with power management system
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032022 What are the input waveform requirements when using average sensing VS. RMS sensing type current/voltage transducers?
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032023 M-System's Power Transducers have no earth ground connection terminal. Why is this?
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032024 I want to measure electric power with a power transducer to provide a pulse output&. Do you have a transducer which can correspond to the change of CT or PT after installed and wired, and the pulse unit (Wh/pulse) of which can be set on site?
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032025 We are planning to monitor AC current signal 0-5A from a current transformer (CT) on a PC. Because the scanning time of PC is fast, we are looking for a fast-response type Power Transducer to meet the feature of this measurement target.
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032026 Bidirectional current transducer -- What is this transducer used for? How different from normal AC current (CT) transducers such as model LCE?
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032027 How to get two pulse outputs for bidirenctional power?
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032036 Why do we need to mount a CT protector on plug-in CT transducers?
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032069 How to determine the VT input value for 3-phase/4-wire configuration for M-System's watt transducers such as the model LTWT?
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032075 We have just integrated two equipment systems together. Now besides the instantaneous power consumption of each system, we also need to monitor the aggregated power consumption as well. Do you have any good advice for this?
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032094

In order to monitor an electric power system in the factory, we monitor the load current of each motor equipped in each assembling line. Wed like to convert the motor load current into 1-5 Vdc standard signals and put it to existing data monitoring instrument.
However, there is a strict budget limit then we like to achieve this system with low price as much as possible. Does M-System have any solution?
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032104

We plan to install a simple measuring instrument in order to measure motors’ load current in each manufacturing line at factory. Specifically, we consider installing them as combination use of an AC current transducer and an indicator.
We can not attach a CT (Current Transformer) at every load current check-up. We are looking for an AC current transducer responding to clamp-on current sensor so that we can measure each motor load current without needing a CT.
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032128

Our factory has a private electric generator and we do power selling as well as power buying. From a viewpoint of power management, we’d like to measure each item of Line current (A), Line voltage (V), Watt (W), Var (var) and Power factor (PF).
As for W, var and PF, we are looking for the transducer, which enables to distinguish power buying from power selling with 4-20mA output proportionally. Does M-System have any suitable power transducer?
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032129

We are monitoring the power of a production line. Although the instantaneous power is already monitoring at the central monitor room, additionally we like to display rough value of current at site. Specifically, we want to classify the current values into three to four levels in advance and display the present current value with the corresponding lamp lit. We need to install measuring equipment easily without interrupting the facilities, and furthermore, we do not want to have the generated in-rush current at the time of starting the facilities indicated by the lamps. Is there any method to realize these requirements? The normal AC current is around 45 A and the maximum current is around 50 A.
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032135

We’d like to measure secondary load current of an Inverter. In order to avoid stopping the factory line in service, we’d like to use clamp-on type current sensor to measure the current. We have several different types of inverters and their measurement current is each different. Let’s say some inverters’ current range are 0-150A and the others’ are 0-300A or other range. Does M-System have any suitable CT transmitters for this kind application?
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032138

We are monitoring plant facility’s value of power, current, voltage and etc. by existing old indicators. They are very old, so we are planning to replace the indicators to new one. We are looking for a new one, which can measure and display several variables of measured data by itself. We also want to collect measured data by PC. Does M-System have any suitable indicator?
By the way, we hope the new indicators to fit the existing panel cutout DIN size 96 x 96mm.
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Isolation / Temperature / Pulse / Strain Gauge / Potentiometer / AC
Pneumatic / Function / Power Supply / Alarm / Power Mesurement
Trend & Log/Communication / Surge Protection / Other Topics
 
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