Type VXE reclosers are carefully tested and adjusted at
the factory to operate according to the published data.
Well-equipped test facilities, a detailed testing procedure,
and trained personnel assure accurate calibration.
Permanent records are kept of each recloser’s test per-
formance. As a result, each recloser leaves the factory
ready for installation, and pre-installation testing is not
necessary. However, should verification of recloser oper-
ation be desired prior to installation, the following char-
acteristics can be checked:
1. Dielectric integrity of the recloser.
2. Minimum-trip current.
3. Operations sequence of the recloser.
4. Operation of the closing solenoid.
The test findings should agree with the settings pro-
grammed in the control. The recloser can be test-tripped
with a low-voltage ac source. However, to test operation
of the high-voltage closing solenoid, a high-voltage ac
source is required.
Safety Requirements
For personnel safety, the recloser, the electronic control,
and the high-voltage transformer must be enclosed in
suitable test cage to prevent accidental contact with haz-
ardous voltage and all grounding precautions must be
observed.
Test Equipment Required
The following equipment is required for these tests:
1. Variable autotransformer — 120 V, 10 A.
2. 600:5 BCT — Slip-on type bushing current trans-
former, set on the 600:5 tap.
3. Ammeter — Must have a rating based on the level of
test current. Since the control is responsive to peak
current, it is recommended that metering responsive
to peak current be used when wave distortion is a
problem.
4. High-voltage transformer T
1 — Used to operate high-
voltage closing solenoid (refer to Figure 13). Be sure
minimum allowable voltage, shown in Table 6, is
maintained at recloser terminals during the 4–5 cycle
interval the closing solenoid is energized.
5. High-voltage test set — Must be capable of supplying
suitable voltages for determining the dielectric with-
stand capability of the recloser. Sensitive circuit
breakers should be included to prevent damage in
the event of a flashover. Refer to Service Information
S280-16-4, Type VXE Electronic Recloser Control
Tester Operation Instructions.
S280-16-1
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