Monitoring technique
Asymmetry relay BA 9040, MK 9040N
varimeter
· According to IEC 255, EN 60 255, VDE 0435 part 303
· Recognition of
- voltage asymmetry
- phase failure
- voltage feedback
- optionally with phase sequence recognition
· Optionally with adjustable response delay
· Insensitive against
- symmetric harmonics up to K-factor K 20 %
· 2 LED displays for power supply and state of contact
· BA 9040:
width 45 mm
MK 9040N: width 22,5 mm
BA 9040
MK 9040N
Function diagram
Approvals and marking
*
phase
sequence
Asym. [%]
asymmetry
phase failure
100
Canada / USA
* only for BA 9040 (see variants)
Applications
setting value
Monitoring three-phase mains for voltage asymmetry, phase failure or
incorrect phase sequence, e.g. in elevators, escalators, crane systems
etc.
t
t
t
t
U
L1
Indications
U
upper LED:
lower LED:
on when supply voltage connected
on when output relay energized
L2
Technical data
Input
U
L3
Nomianl voltage UN:
Voltage range:
Nominal consumption:
BA 9040:
3 AC 400 V
0,8 ... 1,1 UN
11-14
BA9040
MK9040N
11-12
approx. 4,8 VA
7 VA
50 / 60 Hz
45 ... 65 Hz
< 0,05 % / K
< 0,02 % / Hz
MK 9040N:
11-14
11-12
/001
Nominal frequency:
Frequency range:
Temperature influence:
Frequency influence:
Resistance of harmonics
symmetric:
11-14
11-12
/010
/011
t
t
t
v
v
v
K-factor K 20 %
11-14
11-12
Setting ranges
t
M7084_a
v
Setting range:
Repeat accuracy:
Release ratio:
Voltage feedback
recognition:
5 ... 15 % voltage asymmetry
£ 0,5 %
< 4 % UN
Circuit diagram
up to 100 % - setting value,
e.g. when setting value = 5 %
asymmetry, 100 % - 5 % = 95 %
Recognition of voltage feedback
up to 95 %
L1 L2 L3
L1 L2 L3 11 21
Time delay tv
BA 9040:
L1
11
21
L1
11
21
0,5 ... 5 s
MK 9040N:
0,5 ... 10 s
12 14 22 24
L3
L2
12 14 22 24
L3
L2
Output
11 12 14
21 22 24
12 14 22 24
Contacts
Response/release time:
BA 9040:
2 changeover contacts
M8482_a
M7353_c
£ 1 s / £ 250 ms
MK 9040N:
Thermal current Ith:
£ 1,5 s / £ 250 ms
6 A (see continuous current limit
curve)
BA 9040.12
MK 9040N.12
All technical data in this list relate to the state at the moment of edition. We reserve the right
for technical improvements and changes at any time.
BA 9040, MK 9040N / 19.11.03 d
1