UltraVac Solid Dielectric
Vacuum Switches
®
Installation Instructions
CAUTION
The equipment covered by these installation instructions
should be installed and serviced only by properly trained
and qualified personnel. It is not the intent of these
instructions to provide for every possible condition in
connection with installation, operation or maintenance, nor to
cover all details
or variations in equipment options. Should problems arise
which are not sufficiently covered herein or should further
information be required, the matter should be directed
to Trinetics.
Manual or Motor Operated
Ultra-15 Rated Maximum Voltage, 15 kV, 200 Amps
Ultra-20 Rated Maximum Voltage, 20 kV, 200 Amps
Introduction
The UltraVac vacuum switch is a solid dielectric, single
pole device designed in conformance with ANSI Standard
C37.66. The switch is constructed of a high performance
vacuum interrupter fully encapsulated within a solid
cycloaliphatic epoxy dielectric compound. The product may
be used to switch capacitor banks, control lighting circuits
and sectionalize power. The vacuum switch can be operated
electrically or by the manual lever. During electrical operation,
the motor torque output is amplified by a permanently
lubricated, steel-to-steel gear train enclosed in a corrosion
resistant steel tank. Motor actuation occurs via a patented
toggle link system.
Receiving, Handling and Storage
The switch should be examined as soon as possible after
being received as difficulty may be experienced in making
a claim for damage not evident upon receipt if delayed. Care
should be used in unpacking to avoid damage to any parts.
Clean off any dirt or particles of packing material that may
have accumulated on the switch. Be sure that no loose parts
are missing or left in the packing material. Two (2) wildlife
protective boots for the terminals are included in each carton.
WARNING
Grounding Requirements
The neutral lead of the low voltage control circuit and the
ground stud located near the switch operating handle should
be properly grounded for safety and to prevent damage from
transient voltage surges. Refer to local Codes & Practices
Installation
Air-breaking isolating switches must be installed on the
supply side of vacuum switches to provide a visible
disconnect. Cutouts or fused disconnects are normally
used for this purpose. Maintenance work should be
undertaken only after the maintenance personnel have
established that the visible disconnects are open and the
portion of the circuit to be worked on is grounded. Refer to
local Codes & Practices for specific component requirements.
A five-pin receptacle is included, which can mate with a
five-pin molded or metal connector. The molded connector
includes a six-foot type SO cable. The metal plug is an ITT/
Cannon connector, part number MS106F18-11S or equivalent,
that meets the MIL-C-5015 specification. Alternate receptacles
are available from Trinetics.
The UltraVac may be mounted directly to a pole, structure or
crossarm. All UltraVac series vacuum switches are provided
with clamp type terminals on each bushing to accommodate
wire sizes from No. 8 to 2/0 AWG. Terminal hardware should be
tightened to a maximum of 15 lbf-ft. The switch module may
be rotated to place the terminals and operating handle in the
most desirable position.
Motor Operation
The operating mechanism is powered by a 120 VAC, 50/60 Hz,
single-phase motor. The operating voltage range is 100 to 130
Volts. An optional 240 VAC, 50/60 Hz, single-phase motor
provides an operating voltage range of 210 to 250 Volts.
To operate the switch electrically, an open or close command
(120 VAC) is placed on pin C or D of the five-pin connector.
The 120 VAC signal causes the motor to run at 8.5 RPM
and a mechanical linkage causes a spring in the cover to
be compressed. After about 2.5 seconds, this spring in the
over-center toggle mechanism causes the mechanism to
toggle. The release of spring energy provides fast action on
both make and break for long contact life. The motor
continues to run until a microswitch interrupts the signal to
the motor. The motor stops and is ready for the next switching
command. See wiring diagram on page three.
Open/Close Time Cycles
Due to variables in the motor operating speed and
components in the toggle mechanism, it is recommended
that the close or open commands be applied to the respective
in for at least 10 seconds to insure complete travel of the
motor cam. The microswitch internal to the motor housing will
remove the power from the motor preventing any possible
Installation Instructions
damage to the motor. If at any time, a switch or switches are
opened manually, it (they) can be closed electrically; however;
an open command must first be provided to the switch(es) to
place the motor into the position to accept the close command.
Provisions are made to monitor the state of the switch via
auxiliary switch contacts which are available as an option.
This ground signal can be used to operate a counter or any
other indicator device in the user’s system.
In the event a momentary type switching command is desired,
the UltraVac vacuum switch can be purchased with a “holding
switch” option.
The motor-operated UltraVac vacuum switch can be operated
manually by means of a handle located under the weather
shield. When the handle is up under the weather shield,
the contacts are closed; when the handle is all the way
down, the contacts are open. The shaft of the handle has
a one-way seal preventing moisture from entering the tank.
Note: Do not force the handle to open or close the switch
(normal force is less than 30 pounds). A loss of control power
while the motor is operating could cause the operating cams
to stop in a position that blocks the handle; thus excessive force
on the handle could damage the mechanism. The Ultra Series
vacuum switch should always be in a fully open or fully closed
position before manual operation is attempted.
WARNING
With this mechanism the operating handle is not directly
connected to the contacts. Therefore, the handle must not
be relied upon as a positive indicator of contact position.
Loss of control power at or near dead-center position,
damanged parts, or welded contacts could cause the handle
to give an erroneous indication of contact position. After the
switch is opened and before working on the equipment, visible
disconnects on the source side of the switches must be
opened and the equipment grounded.
Contacts
The UltraVac has several distinct advantages: solid dielectric
(no oil or gas), compact size, high reliability and vacuum
interrupter technology resulting in maintenance-free operation.
The design of the interrupter is conceptually simple: two
separable contacts within an evacuated envelope. In practice,
the design is quite complex, involving
carefully selected contact materials, contact configurations and
selection of envelope materials integrated with assembly,
joining and vacuum processing techniques.
Warranty
The seller warrants that its products shall be free from defects in
workmanship and materials for a period of one year from date
of shipment and that its responsibility is limited to repair or
replacement, at its sole discretion, of the defective part(s). The
seller shall not be liable for consequential damages or related
costs. The foregoing warranty is exclusive and in lieu of all other
warranties of quality whether written, oral or implied, including
any warranty of merchantability or fitness for purpose.
ULTRA
15
ULTRA
20
Rated Maximum Voltage, for grounded banks,
phase-to-ground, kV, RMS
18.6
24.0
Rated Maximum Voltage, for ungrounded banks,
phase-to-phase, kV, RMS
15.5
20.0
Impulse Withstand Voltage, kV BIL
110
125/150
Low Frequency Installation Level Withstand Test, 60 Hz:
1 Minute Dry, kV
10 Seconds Wet, kV
50
45
60
50
Continuous Current, Amps
200
200
Capacitive Switching Current, Amps
200
200
Momentary Current Rating, Amps Asymmetrical
9000
9000
Short Time Current Ratings:
1/2 Second, Amps Symmetrical
1 Second, Amps Symmetrical
6000
4500
6000
4500
High Frequency Transient Making Current, Amps Peak
12000
12000
Specifications
Motor Nominal Operating Voltage, VAC 50/60 Hz
120
120
Motor Operating Voltage Range, VAC 50/60 Hz
100 to
130
100 to
130
Switch Operating Time, seconds
2.5/4.0
2.5/4.0
Motor Current Rating, Amps
3.0
3.0
Weight (Lbs.)
42
45
Installation Instructions
UltraVac Dimensions
Outline dimensions for the UltraVac vacuum switch
depicting pole, lug, crossarm or substation mounting. Note:
The drawing shown provides dimensions that are identical
for each UltraVac vacuum switch and the chart at right
indicates dimensions that vary depending on switch type.
The columns of the chart reflect dimensions for each switch
type based on rated maximum voltage and kV BIL. All
drawing and chart dimensions are in inches.
Creepage Distance:
ULTRA-15
ULTRA-20
Terminals to Ground
27.0"
33.0"
Terminal to Terminal
30.0"
30.0"
ULTRA-15
ULTRA-20
Dimension Letter:
A
9.8"
9.8"
B
9.7"
9.7"
C
16.9"
16.9"
D
28.7"
30.8"
E
7.5"
7.5"
F
21.2"
23.3"
G
9.8"
9.8"
UltraVac Connections
(NEUTRAL)
NEUTRAL
NEUTRAL
(NEUTRAL)
NEUTRAL
NEUTRAL
Installation Instructions
SOLENOID
OPERATOR
Specifications
Rated Maximum Voltage, for grounded banks,
phase-to-ground, kV, RMS
24.0
Rated Maximum Voltage, for ungrounded banks,
phase-to-phase, kV, RMS
27.6
Impulse Withstand Voltage, kV BIL
125/150
Terminal-to-Ground Creep Distance, in.
33
Low Frequency Installation Level Withstand Test, 60 Hz:
1 Minute Dry, kV
10 Seconds Wet, kV
60
50
Continuous Current, Amps
200
Capacitive Switching Current, Amps
200
Momentary Current Rating, Amps Asymmetrical
Short Time Current Ratings:
1/2 Second, Amps Symmetrical
1 Second, Amps Symmetrical
9000
High Frequency Transient Making Current, Amps Peak
9000
Solenoid Nominal Operating Voltage, VAC 50/60 Hz
120
Solenoid Operating Voltage Range, VAC 50/60 Hz*
80 to 130
6000
4500
Dual Solenoid Operator
Solenoid Operating Current Rating, Amps
12
Switch Operating Time, sec (open/close)
0.031 to 0.045
Maintenance Free Operations (open/close)
• P
ositive latching cam prevents delatching due to shock
and vibration
• Reliable low voltage inhibit prevents mis-operation
due
to abnormal system conditions
• Durable and maintenance-free design with few
moving parts
50000
Weight (Lbs.)
45
* Operating voltage measured at receptacle pin.
A
Dual Solenoid Operator Connections
F
D
A - Aux - Switch Closed
Vacuum
Contact
Standard
Switch Wiring
A - Aux
Vacuum
Contact
Optional Aux
Switch Wiring
NO
NC
NO
NO
NC
B - Neutral
NC
NC
B - Neutral
S
D - Open
E - Aux - Switch Open
S
B
G
NC
C
NO
NO
C - Close
E
C - Close
D - Open
E - Aux
Creepage Distance:
S
S
Terminals to Ground
33.0"
Terminal to Terminal
30.0"
Dimension Letter:
©2013 Hubbell Power Systems. All rights reserved. Hubbell, the Hubbell logo are registered trademarks or
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II_02_029_E_0113
A
9.8"
B
9.7"
C
16.9"
D
30.8"
E
7.5"
F
23.3"
G
9.8"
33249100