DOLD VARIMETER BA 9065 Series Translation Of The Original Instructions

Monitoring Technique
VARIMETER
Underload Monitor (cos ϕ)
BA 9065
Function Diagram
S
X1 L1/i L1/k L2
L1
L2
L3
U bzw. L1/L2/L3
H
K
I
0
X1 L1/i
cos
cos (set)
(Alarm- Auto -Reset)
0
11-14
Relay normally
off
Alarm (I=0)
off
11-12
11-14
Relay normally
on
Alarm (I=0)
off
11-12
11-14
Relay normally
off
Alarm (I=0)
on
11-12
11-14
Relay normally
on
Alarm (I=0)
on
11-12
Circuit Diagrams
L1/i L1/k
X1 L2 L3
L1/i L2 11 23
L1/k L3 12 14 24
11 12 14 23 24
M8077
BA 9065.20
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.
K
BA9065
L3
M
3~
t
t
t t t
t t t
M6591_e
L1/i L1/k
X1 L2 L3
A1 L1/i L2
A2 L1/k L3 12 14
11 12 14 A1 A2
BA 9065.11/001
Translation
of the original instructions
• According to IEC/EN 60255-1
• Detection of underload (cos ϕ)
• Current ranges up to 10 A, for higher values a CT must be used
• Adjustable response value
• Programmable functions:
- Alarm when I = 0
- Automatic or manual reset
- Closed or open circuit operation
• Manual remote reset
• Adjustable operate delay
• Independent of phase sequence
• Also for 400 Hz systems
• Optionally for motors with frequency converters (10 ... 100 Hz)
(see notes)
• Width 45 mm
Approvals and Markings
Applications
Monitors underload and no load on squirrel cage motors e.g.
• Fan monitoring (broken belt)
• Filter monitoring (blocked filter)
• Pump monitoring (blocked valve, dry running)
t
Function
The underload monitor BA 9065 measures the phase shift between voltage
and current. The phase angle changes with changing load. This measuring
method is suitable to monitor asynchronous motors on underload and no
t load independent of motor size. The change of cos ϕ has to be bigger then
the hysteresis of the monitor (see diagram). In some cases the cos ϕ does
not change much with load change on the motor, e.g.:
- small load change on oversized motor
t
- single phase chaded-pole and collector motors
In these cases we recommend the use of our motor load monitors e.g BH 9097.
The BA 9065 can also be used on systems with variable frequency because
of it's frequency independent measuring principle.
The BA 9065.20 does not need a separate auxiliary supply as it takes the
required energy from the monitored mains.
A yellow LED indicates operation. If the cos ϕ goes under the setting value
the device reacts after a settable time delay. A green LED shows the state
of the output relay.
Functions programmable with DIP-switches:
• Open circuit operation (relay normally off)
• Alarm when no current is flowing (Alarm at I = 0 on)
• Closed circuit operation (relay normally on)
• No alarm when no current is flowing (Alarm at I = 0 off)
Function programmable with bridge X1-L1/i:
11
bridge
X1-L1/i
· ·
Manual reset, reset with built-in reset button or remote reset
· ·
with button connected to X1-L1/i
M8078
Automatic reset when system returns to correct load (cos ϕ)
1
11.01.21 en / 335A