BENSHAW RSi H2 Series - Page 366

Maintenance
354
890053-00-02
Inspection
Item
Inspection
Period
Inspection Method
Criterion
Customer
use
Monthly
1 year
2 year
Check/
Initial
/Date
Inspect the pressure relief
vent (or pin). Is there any
swelling or rupture?
X
Motor (Note 1)
X
Megger Test
500 MΩ
Powered
inverter
- Not Running
Checks/Measurements
Input Voltages
Is the input voltage from
the main within spec of
the inverter?
X
Measure the
voltage between
the terminals R, S,
T.
inverter
rating
+/-15%
Is the input voltage from
the main balanced within
spec of the inverter?
X
2%
DC Bus
Voltage
Is the DC Bus Higher or
Lower than normal?
X
Measure the DC
Voltage between
the Pos. and Neg.
terminals of the
inverter.
Input Voltage
x SQRT2
(+/- 10%)
Cooling Fan
Is there any abnormal
oscillations or noise?
X
Turn OFF the
power and turn the
fan by hand.
Must rotate
smoothly.
Trip Circuit
(Input to
inverter)
Is inverter trip circuit
functional?
X
Identify the inverter
input trip circuit.
Open or Close
external trip
mechanism.
inverter must
trip.
Powered
inverter
- Running
Checks/Measurements
Output
Voltages
Is there any voltage
imbalance between
phases of the output?
X
Measure the
voltage between
the output terminals
U, V and W.
Tol. +/-
2%230V
(5V)460V
(10V).
Does the displayed
Output Voltage agree with
measurement?
X
Display parameter
for Output Voltage,
compare to
measured value.
Tol. -10%
+ 20%
Note 2
Output
Current
Is there any current
imbalance between
phases of the output?
X
Measure the
current out of each
phase U, V, W.
Tol. +/-3%
Note 2
Does the displayed
Output Current agree with
measurement?
X
Display parameter
for Output Current,
compare to
measured value.
Tol. +/-5%
Note 2
Motor
Are there any abnormal
vibrations or noise?
X
Auditory, sensory,
visual check.
Mounting
and Coupling
Is there any unusual
odor?
X
Check for overheat
and damage.
Note 1
Do not run an insulation resistance test (Megger) on the inverter or with inverter connected to supply and motor,
damage will occur.
Note 2
Multimeter measurements of inverter output could vary depending on the type of meter.