Eaton COOPER POWER Series M Installation And Operation Instructions page 38

transportation, Eaton recommends high potential withstand
tests before installation.
To verify the dielectric integrity of the recloser, the following
tests and equipment are recommended:
High-voltage test set – Must be capable of supplying
suitable voltages for determining the dielectric withstand
capability of the recloser. Sensitive circuit breakers should
be included to prevent damage in the event of a flashover.
Use the following procedures to perform high-potential
withstand tests at 75% of the rated low-frequency
withstand voltage for 60 seconds. See Table 16 for test
voltages and Figure 33 for test connection diagrams.
WARNING
Hazardous voltage . The switchgear (apparatus and
control) and high-voltage transformer must be in a test
cage or similar protected area to prevent accidental
contact with the high-voltage parts .
Solidly ground all equipment . Failure to comply can
result in death, severe personal injury, and equipment
damage .
CAUTION
Radiation . At voltages up to the specified test
voltages, the radiation emitted by the vacuum
interrupter is negligible . However, above these
voltages, radiation injurious to personnel can be
emitted . See Service Information S280-90-1, Vacuum
Interrupter Withstand Test Voltage Ratings Information
for further information .
The following tests should be applied to the SPEAR single-
phase recloser:
Closed-contacts high potential test
1. Close the recloser contacts.
2. Ground the recloser using the grounding lug on the
head casting.
3. Apply proper test voltage to one of the bushing
terminals.
4. The recloser should withstand the test voltage for 60
seconds.
Open-contacts high-potential test
1. Open the recloser contacts.
2. Ground the recloser using the grounding lug on the
head casting.
3. Ground the bushing terminal on one side of the
recloser.
4. Apply proper test voltage to the ungrounded bushing
terminal.
5. The recloser should withstand the test voltage for 60
seconds.
6. Reverse the test and ground connections on the
bushing terminals.
7 . Apply the proper test voltage to the ungrounded
bushing terminal.
8. The recloser should withstand the test voltage for 60
seconds.
T221 .5
G109 .2
Figure 33 .
withstand testing for the SPEAR single-phase recloser
Table 16 . SPEAR single-phase recloser withstand test
voltage ratings information
Description
15 kV
27 kV
38 kV
INSTALLATION AND OPERATION INSTRUCTIONS MN280048EN June 2016
SPEAR™ Single-Phase Recloser System
CLOSED CONTACTS HIGH-POTENTIAL
INSULATION LEVEL WITHSTAND TEST
PHASE TO GROUND
ac
2
1
OPEN CONTACTS HIGH-POTENTIAL
INSULATION LEVEL WITHSTAND TEST
OPEN CONTACT
ac
2
1
Connection diagrams for high-potential
75% of rated low-frequency withstand voltage
(1 minute dry) (kV rms)
AC
37.5
45.0
52.5
OPEN CONTACT
ac
2
1
DC
53.0
63.6
74.2
33