Megger TRAX User Manual

32 TRAX ZP-AJ01E AJ0383DE
5 OPERATING INSTRUCTIONS
5.5 Winding resistance
Important
Read and comply with the safety instruc-
tions “2 Safety” on page 8.
Always comply with local safety regula-
tions.
1] Press
The winding resistance app is used for measuring
DC resistance in transformer windings and other
objects with high inductance. The app supports single
channel and dual channel (Simultaneous Winding
Magnetization, SWM).
Recommended test current ranges
1 A 5 mA – 1 A Resistance range 1 m – 10 k
16 A 1 A – 16 A Resistance range 160 µ – 50 
100 A 10 A – 100 A Resistance range 10 µ – 5 
Note When testing transformer windings, the test
current should be sufficient to saturate the
core and thus minimizing inductance. This
happens typically at about 1% of the rated
winding current. Avoid testing at >15% of
rated current since this may cause heating
which will affect the accuracy. Typical test
currents are 1-15% and using 5-15% will give
fast and stable readings.
Controls for tap changer operation
The CONTROL contacts are used to remotely operate
the tap-changer.
+ / raise controls the left ch 1 contact.
- / lower controls the right ch 2 contact.
Buttons to use during operation
+ / raise
- / lower
capture/measure data without stopping the
generator (for OLTC measurements).
Activating + or - buttons closes the contact for about
500ms. After one operation the contacts are blocked
for about 2 seconds before the next operation is
possible.
Run two wires from each output contact and connect
them in parallell with the manual operating contacts
for raise/lower tap (at the tap-changer control cabi-
net). Max carrying current (short-term) is 35 A.

Megger TRAX Specifications

General

Brand	Megger
Model	TRAX
Category	Test Equipment
Language	English