Diagrams and descriptive information on this page are intended to be
illustrative only and not specific instructions. To obtain optimum
performance in any particular application, a certain amount of
experimentation is generally required to establish the proper test
configuration, parameters and operating procedure.
In addition, internal modifications in the Surge Tester are sometimes
needed to obtain peak performance for specific applications. For high
production applications: particularly, those involving more than one test,
automatic sequencing equipment is available. This includes standard
systems for testing armatures, stators, and typical coils. Consult factory
for assistance. (Most common used methods are A & B) Please note that
lead modification may be required for some of the following testing
configurations.
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A. IRON CORE WINDINGS SUCH AS TRANSFORMERS,
CHOKES, RELAYS, ETC., FOR OPENS, SHORTS AND
GROUNDS.
NOTES:
1. This setup will detect turn-to-turn shorts in any of the windings.
To check unused windings for opens, simply short leads and retest,
tester will indicate short unless winding is open.
2. If ground test and winding-to-winding shorts test is required, add
dotted ground circuit. Multiple tests should be made with winding
leads reversed between the tests.
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B. SIMPLE WINDINGS, SUCH AS MOTOR AND
GENERATOR FIELDS, FOR OPENS, SHORTS AND
GROUNDS.
NOTES:
1. This technique will detect turn-to-turn and layer-to-layer shorts in
salient pole windings and in some types of distributed windings.
2. If ground test is desired, add dotted ground circuit and make two
tests with winding leads reversed between the tests.
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C. MULTIPLE WINDINGS, SUCH AS MOTOR AND
GENERATOR STATORS, FOR OPENS, SHORTS AND
GROUND.
NOTES:
1. Individual tests should be made on each winding, with connections
changed between tests as shown.
2. If coupling between windings is insufficient to detect all winding
faults, additional tests should be made with winding leads
reversed.
3. If ground test is desired, add dotted ground circuits.
4. If windings are identical, calibration resistors may be omitted.
D. DISTRIBUTED WINDINGS, SUCH AS
POLYPHASE AND SPLIT PHASE STATORS
FOR OPENS, SHORTS AND GROUNDS.
NOTES:
1. Two tests should be made with lead 1 and 3
interchanged between tests.
2. If windings are not identical, calibration resistor may
require change when leads are interchanged.
3. If ground test is desired, add dotted ground circuit.
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E. MOTOR AND GENERATOR ARMATURES FOR
POOR
CONNECTIONS, OPENS AND SHORTS.
NOTES:
1. Armature must be indexed or rotated during test.
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F. MOTOR AND GENERATOR ARMATURES FOR
OPENS, SHORTS AND GROUNDS.
NOTES:
1. Armature must be indexed or rotated during test.
2. Pick off contacts must not be staggered in relation to
commutator bars.
3. This test especially sensitive to insulation weakness.
4. If ground test desired, add core contact and dotted
ground circuit.
TYPICAL TEST TECHNIQUES
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