High Voltage Tests - Voltech AT5600 User Manual

C H A P T E R 7 – T E S T S
7.1.2.
Test Description
Hi-Pot (DC)
HPDC
Hi-Pot (AC)
HPAC
Hi-Pot Ramp
ACRT
(AC)
Hi-Pot Ramp
DCRT
(DC)
Voltage
ACVB
Breakdown
(AC)
Voltage
DCVB
Breakdown
(DC)
Surge Stress
SURG
Test
Insulation
IR
Resistance
Leakage
ILK
Current Test
Magnetizing
MAGI
Current
Open Circuit
VOC
Voltage
Wattage
WATT
Stress Wattage
STRW
AT5600 User Manual 98-119 issue 14
A N D T E S T C O N D I T I O N S

HIGH VOLTAGE Tests

Main Application
All transformers
especially those used
for safety insulation
All transformers
especially those used
for safety insulation
All transformers
especially those used
for safety insulation
All transformers
especially those used
for safety insulation
Transformers with
MOV fitted
Transformers with
MOV fitted
All transformers,
especially those
using fine wire
All transformers
Medical applications
Usually line
frequency
transformers
Usually line
frequency
transformers
50/60Hz Iron core
transformers
Line frequency &
High Frequency
Transformers
Winding Tested
Between selected
windings usually
primary to secondary,
screens and core
Between selected
windings usually
primary to secondary,
screens and core
Between selected
windings usually
primary to secondary,
screens and core
Between selected
windings usually
primary to secondary,
screens and core
Between selected
windings usually
primary to secondary,
screens and core
Between selected
windings usually
primary to secondary,
screens and core
Selected windings
Between selected
windings
Between Primary and
Secondary Windings
One winding, usually
the primary
All other windings
One winding
One Winding (Usually
the primary)
Reason for Test
High voltage safety
insulation
High voltage safety
insulation
High voltage safety
insulation
High voltage safety
insulation
High voltage safety
insulation
High voltage safety
insulation
To identify shorted
turns
Winding isolation
check where safety is
not involved
Checks for a
common mode
current due to
capacitance
Correct primary turns.
Correct core material
properly assembled
Correct secondary
turns. Correct
phasing
Correct core material.
Properly assembled
Checks integrity of
inter-turn insulation,
the magnetic material
and joints
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