bonitron M3534-I3, Руководство для пользователей

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User’s Manual
33
both methods completely before attempting any adjustment of the DC bus threshold
voltage setting.
D AN G E R !

H
I G H V O L T A G E S W I T H R E S P E C T T O T H E C H A S S I S A R E
P R E S E N T
!
 N
E V E R U S E A N U N I N S U L A T E D T O O L O F A N Y K I N D
!
 F AI L U R E T O H E E D T H E S E W AR N I N G S M AY R E S U L T
I N S E R I O U S I N J U R Y O R D E AT H !
4.5.1. D
ETERMINING THE
DC B
US
T
HRESHOLD
V
OLTAGE
S
ETTING
D
IRECTLY
Checking the DC bus threshold voltage setting directly requires the input power
to be removed from the M3534. If the M3534 DC bus is not connected to the
output of the drive, this can be done without powering down the drive.
Otherwise, the drive must have the AC power removed from it as well. It may
be difficult to get an accurate reading using a digital voltmeter due to the time
it takes to calculate and average the reading. Use an analog meter if possible.
1.
Monitor the output DC bus of the M3534, or the input DC bus to the drive,
if connected.
2.
Remove input voltage supply from system. This includes the AC input
and battery bank input.
3.
As the DC bus voltage drops to the DC bus threshold voltage setting, the
M3534 will become active and maintain the DC bus voltage at the
threshold voltage setpoint for approximately one second while the M3534
input filter capacitor discharges. The DC bus will then continue to drop.
4.
Read the DC bus voltage as it is being maintained. This is the DC bus
threshold voltage setting.
4.5.2. D
ETERMINING THE
DC B
US
T
HRESHOLD
V
OLTAGE
S
ETTING
U
SING THE
T
EST
M
ODE
The DC bus threshold voltage setting may be checked with the drive connected
using the test input to put the M3534 in Test mode. This raises the DC bus
voltage approximately 17% above the actual DC bus threshold voltage setting,
and is a fair indication of how the system is set. This has the advantage of not
having to remove the input power, and can actually be done while the system
is loaded.
Please note:

If heavily loaded, the M3534 may run in current limit and the DC bus voltage
may not rise as much as if it were unloaded.

If the DC bus threshold voltage is set too high, the DC bus test voltage may
be limited by the overvoltage setting of the M3534, thus providing an
inaccurate result.
The M3534 may shutdown from the timeout feature, depending on the load.
1.
Monitor the output DC bus of the M3534, or the input DC bus to the drive,
if connected.
2.
Enable the Test input, or initiate a test with the display.
3.
Monitor the DC bus voltage while the M3534 is in Test mode. This is the
DC bus test voltage setting.
The DC bus test voltage setting is approximately 17% higher than the DC bus