M4000 Insulation Analyzer User Guide
72A-1230 Rev. F 4-7
July 22, 2005
Overview of M4100
The M4100 stimulates the insulation specimen under test with an AC voltage
up to 12 kV in magnitude, an applied potential whose fundamental frequency
is at or near the power system frequency. The instrument directly measures the
specimen’s current and voltage to derive all reported output parameters
relating to insulation properties, including power loss, capacitance and power
factor. The applied AC voltage is asynchronous with the power line frequency
so that electrostatic interference can be filtered out. The M4100 contains
digital control, power, analog measurement and safety circuits.
An overview of the M4100 and its major components gives a good starting
point for gaining basic functional knowledge that is helpful in effective
troubleshooting. A block diagram of the M4100, illustrating its major
components, appears in Figure 4.1 on page 4-8.
Amplifier Assembly page 4-63
Guard Mode Switch Board page 4-66
Timing Board page 4-68
DSP/CPU Board page 4-70
Safety Board page 4-72
Main Reference Assembly page 4-74
Guard Board page 4-76
Low Voltage Power Supply Board page 4-78
Heater/Temperature Controller
Board
page 4-80
Field Calibration Reference page 4-82
I/O Protection Board page 4-83
Transformer page 4-85
HV Pothead page 4-91
Fan Filter page 4-93
Fan page 4-94
Section Purpose Page
Reference
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