Power Unit Function Check; Checking The Power Unit With Mains Voltage Switched Off - Reliance electric GV3000/SE Instruction Manual

Power Unit Function Check

Checking the Power Unit with mains voltage applied (without START)
Several checks in the power unit, as output voltage measurement of each phase and short circuit
indication, are provided in the start-up instructions of the controller (refer to the regulator manual).

Checking the Power Unit with mains voltage switched off

NOTE: All checks inside the power unit are done with AC-line connections open,
disconnected motor and DC-bus discharged.
For checking printed circuit boards refer to the regulator manual.
First check all line input and DC-bus fuses. If one of the fuses is blown, replace the fuses and check all
power semiconductors of the input and output bridge by the use of a megohm meter (multimeter in
diode range) according to the following table.
NOTE: If a transistor malfunctions:
− On Inverters type 003-030 and 039/044 the entire unit must be replaced because they do not
have replaceable transistor modules.
− On inverters type 038/043 and 058-170 single IPM's must be replaced always together with the
driver card.
− On the IGBT spare parts set (486.60.xx) for inverters type 180-360 the driver card is already
mounted, because the control inputs of the IGBT modules are static sensitive.
Input Input
Diode Thyristor
1) 2)
No. No.
1
2
3
4
5
6
1
2
3
4
5
6
* If the optional terminals 45 and 47 are not fitted (e.g. on power units with built-in braking chopper
option), remove cover and connect meter (range: >650V) to the measuring points (+) and (-)
according to DC-Bus Voltage Check on page 4-1.
1) on type AC003 - 170
2) on type AC180 - 360 only
4-2
IPM or Meter connection
IGBT (M. in diode range)
No. (+)
47* 1L1(R)
47* 1L2(S)
47* 1L3(T)
1L1(R)
1L2(S)
1L3(T)
47*
47*
47*
1L1
1L2
1L3
V6 47*
V5 47*
V4 47*
V3 W(T3)
V2 V(T2)
V1 U(T1)
4 - MAINTENANCE
Component intact if
resistance R is
(-)
0.3 < R < 8 kohm
45 *
45 *
45 *
1L1 R > 100 kohm
1L2
1L3
45 *
45 *
45 *
W(T3) 0.3 < R < 8 kohm
V(T2)
U(T1)
45 *
45 *
45 *
GV3000/SE
Component defective if
continuity (short circuit)
or open when meter
connected with
reversed polarity
continuity (short circuit)
continuity (short circuit)
or open when meter
connected with
reversed polarity
49'1327 e