Technical FAQs

# How to calculate the pulse weight (Ke) for the PowerLogic E5600 digital pulse output

Note: The E5600 takes into account the CT/PT multipliers when determining when to pulse.
To calculate the pulse weight value, first determine the highest kW value you can expect and the required pulse rate. In this example, the following assumptions are made:

The CT multiplier is 80, the PT multiplier is 4
The maximum load is 1600 kW.
One KY transition per second should occur at full scale.

Step 1: Convert the 1600 kW load into a primary energy value, then into kWh/second.

Primary Energy Value = (1600 kWh)(1 Hr)/(80*4) = 5 kWh (this is how much energy the meter sees)
5 kWh/1 hour = 5 kwh per 3600 seconds yields 0.00138 kWh/second

Step 2: Calculate the kWh required per pulse.
(0.00138 kWh/second)/(1 pulse/second) = 0.00138 kWh/pulse

Step 3: Round to nearest thousandth, since the meter only accepts 0.001 kWh increments.
Ke = 0.001 kWh/pulse

Legacy KB System (APS) Data: RESL205158 V1.0, Originally authored by MaTh on 04/26/2011, Last Edited by MaTh on 04/26/2011
Related ranges: E5600