3-phase power measurement terminal

Max. 500 V AC 3~

Max. 1 A
via measuring transformers x A/1A

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The KL3403 Bus Terminal enables the measurement of all relevant electrical data of the supply network. The voltage is measured via the direct connection of L1, L2, L3 and N. The current of the three phases L1, L2 and L3 is fed via simple current transformers. All measured currents and voltages are available as root-mean-square values. In the KL3403 version, the effective power and the energy consumption for each phase are calculated. Through the relationship of the root-mean-square values of voltage U * current I and the effective power P, all other information such as the apparent power S or the phase shift angle cos φ can be derived. For each fieldbus, KL3403 provides a comprehensive network analysis and an energy management option.

The KL3403 Bus Terminal can be ordered to suit further current and voltage ranges, such as 5 A, 20 mA or 333 mV. An overview of the different versions can be found under ordering information.


Technical data KL3403, KS3403
Number of inputs 3 x current, 3 x voltage
Technology 3-phase power measurement
Measured values current, voltage, effective power, energy, cos φ, peak values U, I and P, frequency
Measuring voltage max. 500 V AC 3~ (ULX-N: max. 288 V AC)
Resolution 16 bit (21 bit, internal)
Measuring current max. 1 A, via measuring transformers x A/1 A
Measurement error/ uncertainty 0.5 % relative to full scale value (U, I), 1 % calculated value
Measuring procedure true RMS with 64,000 samples/s
Update time 50 ms per measured value preset, free configurable
Electrical isolation 1500 V (K-bus/field potential)
Current consumption power contacts – (no power contacts)
Current consumption K-bus typ. 115 mA
Bit width in the process image input/output: 3 x 16 bit data, 3 x 8 bit control/status
Special features energy meter, power measurement, true RMS
Weight approx. 75 g
Operating/storage temperature -25…+60 °C/-40…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. rating/installation pos. IP20/variable
Pluggable wiring for all KSxxxx Bus Terminals
Approvals/markings CE, UL


Housing data KL-12-8pin KS-12-8pin
Design form compact terminal housing with signal LEDs terminal housing with pluggable wiring level
Material polycarbonate
Dimensions (W x H x D) 12 mm x 100 mm x 68 mm
Installation on 35 mm DIN rail, conforming to EN 60715 with lock
Side by side mounting by means of double slot and key connection
Marking labeling of the BZxxx series
Wiring solid conductor (e), flexible conductor (f) and ferrule (a): spring actuation by screwdriver
Connection cross-section s*: 0.08…2.5 mm²,
st*: 0.08…2.5 mm²,
f*: 0.14…1.5 mm²
s*: 0.08…1.5 mm²,
st*: 0.08…1.5 mm²,
f*: 0.14…1.5 mm²
Connection cross-section AWG s*: AWG 28…14,
st*: AWG 28…14,
f*: AWG 26…16
s*: AWG 28…16,
st*: AWG 28…16,
f*: AWG 26…16
Stripping length 8…9 mm 9…10 mm
Current load power contacts Imax: 10 A


Data Sheet: KL3403


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