Cooper S225-10-30, Инструкции по установке, эксплуатации и техническому обслуживанию

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VR-32 Voltage Regulator Installation, Operation, and Maintenance Instructions
44
Applied Voltage
. Apply a source voltage of 120 V (*240 V international)
to the control panel external source terminals. Check
the polarity of the source leads before connecting to
the control external source terminals.
*International units setup for 240 V may have a 240 V
decal at the control panel external source terminals.
A . Apply the hot lead to the Black terminal on the
external source.
B . Ground to White terminal.
Note: Failure to connect properly will cause damage
to control.
2 . Switch the Internal/ External switch to External .
3 . Switch the Auto/Remote-Off-Manual switch to
Manual .
4 . Using the Raise/Lower switch, lower the tap-changer
until the position indicator reads 6 lower .
5 . Switch the Auto/Remote-Off-Manual switch to OFF .
6 . Switch the Internal/External Switch to OFF .
7 . Remove the external source from the external source
terminals.
8 . Using at least a #14 stranded copper cable, jumper the
“S”, “L” and “SL” bushing terminal together.
. Connect the applied ac voltage potential test lead from
the high voltage test transformer to one of the bushing
terminals.
0 . Ground the tank of the of the voltage regulator.
. Close the C knife switch and open all other knife
switches, which are located on the back panel inside
the control box.
TAbLE 8
Applied Potential for New Units
BIL Applied AC Potential Test Voltage (kV)
30 10
45 15
60 19
75 26
95 34
125 40
150 50
200 70
TAbLE 9
Applied Potential for Used Units
(Units that have been energized on a system)
BIL Applied AC Potential Test Voltage (kV)
30 6
45 9
60 11.5
75 15.5
95 20.5
125 24
150 30
200 42
2 . Refer to the regulator nameplate for the BIL and refer
to Table 8 or 9 to determine the correct ac potential
voltage. Starting at zero volts, increase the voltage to
the specified level, within 15 seconds.
3 . The potential voltage is to be applied for 60 seconds.
The following may indicate a failure:
A . A sudden increase in test circuit current.
B . An indication of smoke and bubbles.
C . An audible sound such as a thump.
D . An appreciable increase in partial discharge (coro-
na) level.
4 . Once a failure has been detected, use extreme caution
when doing any diagnostic testing.
5 . Once the applied voltage test time has been completed
and there is no signs of problem lower the potential
voltage to zero volts.
6 . Return the tap-changer back to neutral by using an
external source voltage to the control and by using the
Internal/External switch, Auto/Remote-Off-Manual
switch and the Raise/Lower switch.
7 . Remove the potential lead and jumper from the bush-
ings and disconnect the ground from the tank.
DANGER: High Voltage. This is a high-voltage
test. The high-voltage potentials can arc to a per-
son or to equipment over a short distance. The regula-
tor must be in a test cage or similar protective device.
Failure to comply will result in serious injury or death.
VR-T230.0
CAUTION:
Equipment Damage. Be mindful of polar-
ity when using an external source. Polarity reversal will
result in control damage.
VR-T201.0
CAUTION:
Equipment Damage. Only an ac power sup-
ply is to be used to energize the control externally. Do
not use a dc-to-ac voltage inverter. Failure to comply can
cause excessive harmonics to be generated and result in
damage to the front panel.
VR-T204.1
WARNING: Hazardous Voltage. The regulator
tank must be solidly earth grounded. Failure to
comply can cause severe personal injury and equipment
damage.
VR-T225.0