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8.2 Example of measurement of transformers of the switch unit BD250..
R >R
n
norm
R =R
n
norm
R <R
n
norm
ZES-4
POWER
Repeat the procedure for the switch positions „2,3,4,5,6"- individual windings of
the transf ormer. Positions "7, 8" are only tested for 4-pole version of the switching
unit with a transformer in N-pole.
Due to transient effect, short pressing of the „TEST" button may result in
short flashing of the yellow LED "
9. Check of the device function
Connect DC ammeter to the device
terminals.
Set the switch to position 1, and press
the TEST button.
The current value must be within the
range specified in the table (see
below).
Perform the check also in positions
2,3,6,7and 8.
switch positions
current value [mA]
6
U
5
ZES-4
5
4
4
W
3
3
2
2
1
V
1
TEST
ZES-4-BD250
5
6
TEST
4
7
3
8
!
2
9
SE-BD-0...-....
SE-BH-0...-....
1
10
TEST ON
TEST ON
TEST OFF
TEST OFF
N.C. SE-B.-....-....
N.C. SE-B.-....-....
R >R
ZES-4
n
norm
5
4
R =R
3
n
norm
2
1
R <R
TEST
n
norm
1
2
146 - 178
234 - 286
n [ ]
n [ ]
7
N
8
n [ ]
n [ ]
6
7
U
N
5
8
4
W
3
2
V
1
ZES-4-BD250
".
ZES-4
POWER
red
3
365 - 446
146 - 178
- 7 -
Position the selector switch to „1".
Press the "TEST" button.
Visual inspection: The green
"
LED „
must be on.
5
6
TEST
4
7
3
8
!
2
9
SE-BD-0...-....
SE-BH-0...-....
1
10
TEST ON
TEST ON
TEST OFF
TEST OFF
N.C. SE-B.-....-....
N.C. SE-B.-....-....
black
-
+
A
6
7
234 - 286
8
365 - 446
GB
990445d
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