Unit: none
e.g. transformer with conversion ratio of 100:5
The basis for calculating consumption and power is explained in more detail below using an example:
Meter constant: 1000 pulses/kWh
Transformer constant: 20 (corresponds to the conversion ratio 100:5 of the current transformer)
Number of measured pulses: e.g. 600 pulses
Time of the pulse counting: e.g. 15 minutes = ¼ h = 0.25 h
Consumption calculation*
Consumption = number of pulses / meter constant * transformer constant
Consumption = 600 pulses * kWh / 1000 pulses * 20 = 12 kWh
Result:Fortheperiodof15minutes,consumptionof12kWhhasbeendetermined.
Power calculation*
Power = number of pulses / meter constant * transformer constant / time of the pulse counting
Power=600pulses*kWh/1000pulses*20/0.25kWh=48kW
Result: For the period of 15 minutes, power consumption of 48 kW has been determined.
* An analogous calculation method is used for the consumption or flow rate of gas or water (in this case in m
3
or
litres).
6.2.4 SIOX manual / automatic mode selection
Depending on the design, the SIOX extension modules have manual control switches so that the 8 relay
outputs can be overridden manually. The manual / automatic mode selection is realised at a relay level that is
subordinate to the controller. The manual / automatic mode selection of each relay is performed via switches
S1…S8locatedontheprintedcircuitboard:
The transformer constant must only be considered in the controller if the meter at the pulse output
does not take account of the transformer constant! If the transformer constant has already been taken
into account for the pulse output of the meter, a 1 must be entered for this in the controller. Note:
Depending on the model and configuration, pulses at the meter output can differ from the consumption
displayed in the meter display.
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