Multi-Tech Systems 7600 Manual Do Utilizador
ION 7500 / ION 7600 User’s Guide
Power Frequency
Power Quality: ION Meters and EN50160 Technical Note
Page 303
Power Frequency Default Measurements
* This data is recorded once a week by Data Recorder module 17.
Optionally, the data below can be recorded every 10 minutes by Data Recorder 32.
Register Label
Source Module Type
Description
Freq N*
Signal Limit Evaluation
number of valid intervals (voltage on all phases within +/- 15% of nominal)
Freq N invld*
number of invalid intervals
Freq N1*
number of valid intervals in which the freq deviates from the nominal by more than +/-1%
Freq N2*
num of valid intervals in which the freq deviates from the nominal by more than +4% or -6%
PO Freq N
Store
Freq N of the previous Observation Period
PO Freq N1
Freq N1 of the previous Observation Period
PO Freq N2
Freq N2 of the previous Observation Period
Freq mean-ep
Sliding Window Demand
average Frequency over 10s (used for display purposes)
Freq mn-op
Minimum
minimum mean Frequency (Freq mean-ep) over 1week (used for display purposes)
Freq mx-op
Maximum
maximum mean Frequency (Freq mean-ep) over 1week (used for display purpose)
Freq N1/N
Arithmetic
N1/N ratio
Freq N2/N
N2/N ratio
PO Freq N1/N
N1/N ratio of the previous Observation Period
PO Freq N2/N
N2/N ratio of the previous Observation Period
Register Label
Description
PQ Freq mean
average Frequency over 10minutes
PQ Freq low
minimum Frequency over 10 minutes (HS measurement)
PQ Freq high
maximum Frequency over 10 minutes (HS measurement)