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Report No.: EM201300221-2 Application No.: ZJ00028648 Page 20 of 48
4.3 VOLTAGE FLUCTUATION AND FLICKS MEASUREMENT
4.3.1 LIMITS
Test standard: EN 61000-3-3:2008
Test Item
Limit
Remark
P
st
1.0
P
st
means short-term flicker indicator.
P
lt
0.65
P
lt
means long-term flicker indicator.
T
dt
(ms)
500
T
dt
means maximum time that dt exceeds 3 %.
d
max
(%)
4%
d
max
means maximum relative voltage change.
dc (%)
3.3%
dc means relative steady-state voltage change
4.3.2 TEST PROCEDURES
The EUT was placed on the top of a wooden table 0.8 meters above the ground and operated
to produce the most unfavorable sequence of voltage changes under normal operating
conditions.
to produce the most unfavorable sequence of voltage changes under normal operating
conditions.
During the flick measurement, the measure time shall include that part of whole operation
cycle in which the EUT produce the most unfavorable sequence of voltage changes. The
observation period for short-term flicker indicator is 10 minutes and the observation period
for long-term flicker indicator is 2 hours.
cycle in which the EUT produce the most unfavorable sequence of voltage changes. The
observation period for short-term flicker indicator is 10 minutes and the observation period
for long-term flicker indicator is 2 hours.
4.3.3 TEST SETUP
Harmonics &
Flicker
Analyzer
+
Power Source
EUT
Support
Power
Cord
Cord
0.8
m
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