Measuring, Motor Protective Relays FAQ


Frequently asked questions and answers for Measuring, Motor Protective Relays - Industrial Automation


Power Sensor: Display Power Consumption with a Counter


Question

How do you display power consumption with a counter?


Answer

The KM20 Power Sensor pulse output is output to a counter, which makes it possible to easily calculate the total power consumption.




KM20 Power Sensor Wiring Method and Current Transformer Mounting Method


Question

How do you wire the KM20 Power Sensor and how do you mount the Current Transformer (CT)?


Answer

The CT has specific wiring and the Power Sensor has polarity (see Figure 1).


Wire the CT so that the load side of the sensing line is on the side of the CT with the label "L" and the power supply for the sensing line is on the side of the CT with the label "K."


Be sure that K and L are connected correctly (see Figure. 2).


If the polarity is incorrect, the power indicator (POWER, green) will flash (see Figure. 3).



Figure 1



Figure 2




What is KM20 Power Sensor?


Question

What is the KM20 Power Sensor?


Answer

The KM20 Power Sensor measures the power consumption for individual pieces of equipment and then outputs a cumulative pulse (cumulative unit pulse) according to the measured power consumption.


Photograph and Dimensions




Power Sensor: Power Data Collection System


Question

How can you construct a power data collection system?


Answer

A system for energy conservation management under standards such as ISO14001 can be constructed by combining the KM20 Power Sensor with a DeviceNet network, which enables simple, flexible data collection. In addition, water, gas, and other energy amounts and production quantities (pulses) can be input and unit energy consumption data can be collected




Measuring & Monitoring Relay: What is Power Consumption?


Question

What is power consumption?


Answer

Power consumption is the amount of work per hour.
Power W = Voltage (V) x Current (A) x Time (h) [Wh]