IMPULSE•VG+ Series 3 Instruction Manual – 07/25/05
6-19
Power Off Checks
To perform a power section check, remove the drives main and control wiring from the terminal
strips. Obtain reading as specified in the table on the next page, and ensure that the reading falls
within the normal reading range.
Test equipment - Analog Ohmmeter set R x 1 scale or digital multimeter set to the diode check.
Device
VOM (on RX1 Scale)
Normal Reading
(Analog Meter)
Normal Reading
(Digital Meter)
Positive Lead
Negative Lead
Input Rectifier
Bridge
*1
L1
+
7–100
Ω
Approximately
0.5 V
L2
+
L3
+
–
L1
–
L2
–
L3
L1
–
Infinite
Ω
OL Displayed
L2
–
L3
–
+
L1
+
L2
+
L3
Bus
Capacitors
+
–
Observe gradually increasing
resistance
Observe gradually increasing
voltage to OL
Pre-charge
Resistor
–
Across the Resistors
100
Ω
or less
–
Output
Transistors
*2
*3
T1
+
7-100
Ω
Approximately
0.5V
T2
+
T3
+
–
T1
–
T2
–
T3
T1
–
Infinite
Ω
OL Displayed
T2
–
T3
–
+
T1
+
T2
+
T3
Braking Diode
(2006–2033)
(4001–4039)
B2
B1
10
Ω
0.5 V
B1
B2
Infinite
Ω
OL Displayed
B2
–
Infinite
Ω
OL Displayed
–
B2
Infinite
Ω
OL Displayed
1. “+” could be any one of three (+) terminals which are labeled as
⊕
1,
⊕
2, and
⊕
3.
2. If the bus fuse is blown you must install a jumper across the fuse terminals to get accurate resistance measurements.
3. If the pre-charge resistor is open, you will read infinite
Ω
b and any output terminal unless you install a temporary
jumper across the resistor.
Summary of Contents for IMPULSE VG+ Series 3
Page 1: ...Software 8001 X July 2005 Part Number 140 10257 Copyright 2005 Magnetek Instruction Manual...
Page 6: ...c h a p t e r 1 Introduction...
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Page 14: ...c h a p t e r 2 Installation...
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Page 24: ...c h a p t e r 3 Wiring...
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Page 40: ...c h a p t e r 4 Programming Basic Features...
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Page 54: ...c h a p t e r 5 Programming Advanced Features...
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Page 149: ...IMPULSE VG Series 3 Instruction Manual 07 25 05 5 96...
Page 150: ...Troubleshooting IMPULSE VG Series 3 c h a p t e r 6...
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Page 170: ...A p p e n d i x A IMPULSE VG Series 3 Parameter Listing...
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Page 183: ...IMPULSE VG Series 3 Instruction Manual 07 25 05 A 14...