Siemens SICAM 7KG85X User Manual

Flicker
Function Description
The flicker is measured according to IEC 61000-4-15.
The short-term flicker value (Pst) and the long-term flicker value (Plt) are determined for phase-to-ground
voltages and delta voltages. The flicker is measured on all 3 voltage channels.
Flickers appear with a frequency from 0.005 Hz to 35 Hz.
The device measures the following flicker types:
•
Short-term flicker values (Pst)
Determined by 10 min (short-term flicker), fixed
•
Long-term flicker values (Plt)
Over 2 h (12 Pst values), fixed
Table 6-3 Recording of the Flicker
Measured Quantities
Measurement Records
PQDIF (Only in SICAM P855)
Short-Term Flicker
P
st
(a-n) x
P
st
(b-n) x
P
st
(c-n) x
P
st
(a-b) x
P
st
(b-c) x
P
st
(c-a) x
Long-Term Flicker
P
lt
(a-n) x
P
lt
(b-n) x
P
lt
(c-n) x
P
lt
(a-b) x
P
lt
(b-c) x
P
lt
(c-a) x
Interfaces: protocols IEC 61850 (PQDIF depending on the measuring interval) and Modbus TCP
The measurement range and accuracy are specified according to the standard IEC 61000-4-15.
Table 6-4
Test Specifications for the Flickermeter Classifier
Rectangular
Changes per
Minute (CPM)
Voltage Fluctuation %
120-V Lamp
50-Hz System
120-V Lamp
60-Hz System
230-V Lamp
50-Hz System
230-V Lamp
60-Hz System
1 3.178 3.181 2.715 2.719
2 2.561 2.564 2.191 2.194
7 1.694 1.694 1.450 1.450
39 1.045 1.040 0.894 0.895
110 0.844 0.844 0.722 0.723
1620 0.545 0.548 0.407 0.409
4000 3.426 Test not required 2.343 Test not required
6.2
6.2.1
Power Quality
6.2 Flicker
120 SICAM, SICAM P850/P855 7KG85X, Manual
E50417-H1040-C482-A9, Edition 03.2022

Siemens SICAM 7KG85X Specifications

General

Frequency	50/60 Hz
Binary inputs	8
Binary outputs	4
Frequency Range	45 - 65 Hz
Communication Interface	Ethernet, RS485
Protection Class	IP20
Protocols	IEC 61850, DNP3, Modbus
Measurement Category	CAT III
Current Input	5A