Moving average filter fault detector type 2, Figure 2-2. maximum instantaneous dropout timing – Basler Electric BE1-BPR User Manual
Page 27
9272000990 Rev J
BE1-BPR Application
2-3
Figure 2-2. Maximum Instantaneous Dropout Timing
A moving average filter (MAF) fault detector provides for a slower but more consistent pickup at low
current levels. A MAF fault detector should be used in applications where the current to be detected is
less than 0.25 ampere. Typically, the response time for pickup and dropout depends on the number of
cycles averaged and how high the input current is above pickup.
Moving Average Filter Fault Detector Type 2
Figure 2-3 shows maximum pickup timing versus current input levels for a 10 cycle MAF fault detector.
Figure 2-3. Maximum Pickup Timing with 10 Cycle MAF FD
0
2
4
6
8
10
12
14
16
1.05
1.25
2
5
20
40
MULTIPLES OF PICKUP BEFORE DROPOUT
M
A
X.
D
R
O
PO
U
T
TI
M
E
(m
s)
PU=9.99A
PU=5.00A
PU=0.25A
PU=9.99A
PU=5.00A
PU=0.25A
D2838-22
20
40
60
80
100
120
140
160
180
1.05
1.25
2
5
20
40
MULTIPLES OF
PICKUP
M
A
X.
P
IC
K
U
P
TI
M
E
(m
s)
PU=1.00A, 10 CYC
PU=0.50A, 10 CYC
PU=0.05A, 10 CYC
PU=1.00A, 10 CYC
PU=0.50A, 10 CYC
PU=0.05A, 10 CYC
D2838-23