KYZ Meter Configuration
Pulse Meter Inputs from Revenue and Sub-Meters
Many revenue meters transmit kW usage through a pulse output from a dry contact output.
To log the instant kW and totalize kWh simply connect the contact output to one of the 4 pulse inputs DI 1-4 on the GRIDlink. The GRIDlink will take the raw pulse count and multiply by the user specified pulse weight to allow reporting of instant kW and kWh.
![KYZ KYZ](http://gridlinktechnology.info/wp-content/uploads/2017/10/KYZ.png)
Form A -vs- Form C
The principle difference beween a form A and form C meter output is the duration of the pulse. By observing the LED DI indicators on the GRIDlink, the type of output can be quickly determined.
Form A simply pulses On then Off each time a unit of energy equivalent to the pulse weight is reached. The kWh is incremented by 1.
Form C will alternate between On and Off where each change represents a unit of energy equivalent to the pulse weight. Because each On period represent 2 units, the kWh will increment by 2 each time On is detected.
The instant kW is calculated by the pulse weight (Kp) and the duration of each increment.
![kWinstant kWinstant](http://gridlinktechnology.info/wp-content/uploads/2017/10/kWinstant.png)
The pulse weight (pulse Constant), Kp, is calculated from the formula where:
If kWh is given:
![Kp Kp](http://gridlinktechnology.info/wp-content/uploads/2017/10/Kp_kWh.png)
If kh is given:
Kh = Watthour constant Wh/revolution (in this example represented by Kt 1.2)
M = Current transformer ratio multiplier (in this example represented by CTR 400)
PPR = Pulses per revolution, the number of KYZ pulses per revolution (in this example there is no actual disc so we assume PPR = 1)
![KpKh KpKh](http://gridlinktechnology.info/wp-content/uploads/2017/10/Kp_Kh.png)