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S280-45-5
CONTENTS
Safety Information........................................................ 2
Introduction .................................................................. 2
Description and Operation .......................................... 3
Specifications and Ratings ......................................... 4
Maintenance ................................................................. 5
Frequency of Maintenance .......................................... 5
Periodic Maintenance .................................................. 5
Manual Operation......................................................... 7
To Close the Recloser .................................................. 7
To Open the Recloser .................................................. 7
Insulation Level Withstand Tests................................ 8
Shop Maintenance Instructions.................................. 9
Bushings ...................................................................... 9
Vacuum Interrupters..................................................... 9
Operating Mechanism ................................................ 11
Motor .......................................................................... 13
Gear Reduction Unit .................................................. 13
Electrical Components .............................................. 14
Sensing Current Transformers Tests ......................... 14
Control Cable Check .................................................. 16
Control Circuit Components ....................................... 16
Service Parts List ....................................................... 21
Bushings and Interrupters (Figure 23) ....................... 22
Interrupter Cabinet (Figure 24) .................................. 24
Operating Linkage (Figure 25) ................................... 26
Operator Cabinet (Figure 26) ..................................... 28
Terminal Panel (Figure 27)......................................... 30
Decals and Labels (Figure 28) ................................... 32
Operating Mechanism Electrical Parts (Figure 29) .... 34
Operating Mechanism Mechanical Parts (Figure 30). 36
June 1991 New Issue
Printed in USA
Service Information
Reclosers
Type VSA12, VSA16 and VSA20/800
Maintenance Instructions
S280-45-5
Figure 1.
KYLE
®
Type VSA Recloser.
901035KMA
1 Service Information S280-45-5 covers the maintenance
instructions for the type VSA electronically controlled,
three-phase, vacuum recloser. The manual includes a
general description of the recloser and its operation and
instructions for periodic inspection, testing and shop
repairs. Keyed service parts exploded-view drawings of
the unit, along with ordering information are included at
the back of the manual.
2
Type VSA12, VSA16 and VSA20/800 Maintenance Instructions
Following is important safety information. For safe instal-
lation and operation of this equipment, be sure to read
and understand all cautions and warnings.
Hazard Statements
This manual contains two types of hazard statements:
WARNING:
Refers to hazards or unsafe practices
which could result in severe personal injury, or
death, and equipment damage.
CAUTION:
Refers to hazards or unsafe practices
which could result in damage to equipment or in
personal injury.
Safety Instructions
Following are general caution and warning statements
that apply to this equipment. Additional statements, relat-
ed to specific tasks and procedures, are located through-
out the manual.
Additional Information
These instructions do not claim to cover all details or
variations in the equipment, procedures, or process
described, nor to provide directions for meeting every
possible contingency during installation, operation, or
maintenance. When additional information is desired to
satisfy a problem not covered sufficiently for the user's
purpose, please contact your Cooper Power Systems
sales engineer.
SAFETY INFORMATION
WARNING:
This equipment is not intended to
protect human life. Follow all locally approved pro-
cedures and safety practices when installing or operat-
ing this equipment. Failure to comply may result in
death, severe personal injury and/or equipment dam-
age.
WARNING:
High voltage. Contact with high volt-
age will cause severe personal injury or death.
Follow all locally approved safety procedures when
working around high voltage lines and equipment.
CAUTION:
At voltages up to 37.5 kv rms and 50
kv dc, the radiation emitted by the vacuum inter-
rupter is negligible. However, above 37.5 kV rms or 50
kV dc radiation injurious to personnel may be emitted.
See Radiation Warning in Service Information S280-90-
1 for further details.
WARNING:
Before installing, operating, main-
taining, or testing this equipment, carefully read
and understand the contents of this manual. Improper
operation, handling or maintenance can result in death,
severe personal injury, and equipment damage.
CAUTION:
Follow all locally approved safety
practices when lifting and mounting the equip-
ment. Use the lifting lugs provided. Lift the load smooth-
ly and do not allow the load to shift. Improper lifting may
result in equipment damage.
INTRODUCTION The VSA12, VSA16 and VSA20/800 three-phase
reclosers feature vacuum interruption and air insulation.
Current interruption takes place in the rugged vacuum
interrupter assemblies which are suspended from the
recloser cover by insulating supports, as shown in Figure
2. The moving contacts, located in each interrupter
assembly, driven by the recloser operating mechanism,
close or open the circuit. Interruption takes place within
two and one-half cycles, while utilizing a contact stroke
of one-half inch.
Recloser tripping and closing are initiated by signals
from the recloser control unit. When current in excess of
the programmed minimum trip level is detected, on any
phase or phases, the recloser control initiates a trip sig-
nal which energizes a solenoid in the operating mecha-
nism of the recloser. When actuated, this solenoid trips
the opening springs, which opens the interrupter con-
tacts.
Closing springs provide the force required to close the
vacuum interrupters, as well as the force required to
charge the opening springs. A 240 Vac motor charges
the closing springs through a multi-stage gear drive.
When 240 Vac is present, the motor is automatically
operated to keep the closing springs in a charged state.
To close the recloser the control initiates a signal which
energizes a solenoid in the recloser operating mecha-
nism. Once actuated the solenoid releases the closing
springs, which close the vacuum interrupters and charge
the opening springs. Therefore a sequence of Open-
Close-Open is available after loss of 240 Vdc power.
An external 240 Vac source is required to operate the
drive motor. A battery, in the electronic control, supplies
the 24 Vdc tripping and closing power.
Recloser tripping employs stored spring energy. The
stored spring energy is released, to open the recloser,
when the trip solenoid is actuated by the 24 Vdc trip sig-
nal. The 24 Vdc trip signal is originated at the recloser
control. The 240 Vac supply is not required to trip the
recloser.
A totally manual closing operation can be accomplished
even during loss of motor power and with the closing
springs discharged. A hand crank can be applied to the
motor to charge the closing springs. Once charged, the
closing springs can be released either from inside or
from below the operator mechanism cabinet. As with
electrical operations, the opening springs are charged by
release of the closing springs, so even a manually closed
unit has energy stored for a trip operation.
Major parts and assemblies of the VSA recloser are
shown in Figures 2 and 3. Being aware of the location of
these components and their part in the operation of the
recloser will give a quicker and clearer understanding of
the recloser maintenance and repair procedures that fol-
low.
3
S280-45-5
Figure 2.
Type VSA Recloser with side panels removed.
911061KMA
DESCRIPTION AND OPERATION The recloser will interrupt fault currents only when
applied within its specified ratings. Consult the following
ratings and compare to system characteristics at point of
application prior to installation.
4
Type VSA12, VSA16 and VSA20/800 Maintenance Instructions
Table 4
Electrical Specifications
Trip Solenoid:
Operating voltage (Vdc)............................................... 24
Peak current (A) ....................................................... 12.2
Actuation time (cycles (ms)) .............................. 1.25 (21)
Close Solenoid:
Operating voltage (Vdc)............................................... 24
Peak current (A) ....................................................... 15.5
Actuation time (cycles (ms)) ................................ 1.5 (25)
Spring Charging Motor:
STANDARD ACCESSORY
Operating Voltage (Vac)
240
120
Voltage Range (Vac)
190-257
90-127
Maximum Current, RMS (A)
14
18
Steady State Current (A)
4.1
9
Running Time (cycl