Introduction
The 3-phase Power Measurement Terminal KL3403 enables the measurement of the electrical data of a three-phase supply network:
- The voltage is measured via the connection of the network at the terminal points L1, L2, L3 and N.
- The current of the three phases is fed in via current transformers at the terminal points IL1, IL2, IL3 and IN.
Non-sinusoidal voltage and current curves can also be read in with a practical accuracy of 1 % to 5 %, depending on the shape of the curve. The limit frequency of the calculations amount to 2 kHz. As the time interval for calculating the values can be adjusted, optimization is possible under a very wide range of circumstances.
Pre-processing of the KL3403 provides rms values in the process image, without requiring high computing power on the controller. From the effective values for voltage (U) and current (I), the KL3403 calculates the active power (P), the energy consumption (W) and the power factor (cos φ) for each phase. From these values the apparent power (S) and the phase shift angle (j), for example, can easily be derived.
The KL3403 thus enables a comprehensive network analysis to be carried out via the fieldbus. Based on the values for voltage, current, active power, apparent power and loading condition, the plant operator can optimize the supply of a drive or a machine and protect the plant from damage and downtime.
Versions
Several variants of the KL3403 are available.
Name | Comment | Nominal value |
|---|---|---|
KL3403-0000 | Standard version | 1 A |
KL3403-0026 | Like KL3403-0000, but without EMC leakage capacitor between terminal points 4/8 and the grounding contact for the mounting rail. | 1 A |
KL3403-0010 | Power measurement terminal with higher-capacity current circuits. | 5 A |
KL3403-0014 | Power measurement terminal with 3 additional voltage circuits instead of the current circuits. For connecting external shunts. | 60 mV |
KL3403-0020 | Power measurement terminal with more sensitive current circuits. | 20 mA |
KL3403-0022 | Power measurement terminal with 6 current circuits, otherwise like KL3403-0020. | 20 mA |
KL3403-0025 | Power measurement terminal with more sensitive current circuits. | 250 mA |
KL3403-0333 | Power measurement terminal designed for usage with 333 mV transformers. | max. 333 mV (AC), |
Further details can be found in chapter Technical data.