Amprobe MEGATEST-5000 Megohmmeter - Manual (Page 21)

4.6 Examples of insulation measurement
Connect the terminals of the insulation you want to measure to the high voltage jacks.
Connect the Guard to a suitable point near the negative terminal (ref. "Use of the
GUARD" – heading 2.5).
WARNING
o
p
Comply with the instructions in the manual, especially refer to chapter 1.
"Accident prevention and safety measures". Improper use could lead to
damage to the instrument or to the equipment being tested.
WHILE MEASURING DO NOT TOUCH THE CONNECTIONS OF THE TEST
LEADS.
The instrument is equipped with a discharge circuit for the capacities
connected to the measuring terminals. When measuring has been completed,
therefore, DO NOT DISCONNECT THE TEST LEADS UNTIL THE
"MEASUREMENT UNDERWAY" SYMBOLS HAVE DISAPPEARED.
4.6.1 Measuring the insulation of the windings of an electrical machine
MEGA EST
T
5000
This measurement can be employed by manufacturers and repair engineers of electric
motors or transformers in order to check out the efficiency of the product and its
compliance with specific regulations.
• Connect the instrument between the frame (on a paint-free part) and the windings
(connect these to each other if they are separated) of the motor.
• Pre-set configurations can be used, for example choosing P25 with the up or down
arrows, one can set a measurement at 500 V for 1’ (minute).
• Should you intend to perform tests using other parameters, choose the appropriate
settings (ref. Section 4.5)
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