Trayer Engineering Corporation
Product Line Overview
Trayer Engineering Corporation
Manufacturers of Quality Electrical Distribution Switchgear since 1962
Product Line Overview
Trayer Engineering: Electrical Pioneer,
Committed to Excellence .............................. 2
Trayer’s Commitment to
Excellent Customer Service .......................... 2
Verified by Design: Simple and Reliable ........ 2
Submersible & Vaultmount Automation........ 3
Padmount Automation Auto Transfer & SCADA ................................. 4
Submersible Switchgear .............................. 5-6
Padmount Switchgear Single-Sided .............. 7
Padmount Switchgear Double-Sided ............ 8
Submersible Features & Control Options ...... 9
Padmount Features & Control Options ........ 10
Trayer Engineering Corporation
898 Pennsylvania Avenue • San Francisco • California • 94107
(415) 285-7770 • (800) 377-1774 • Fax (415) 285-0883 • sales@trayer.com • www.trayer.com
Trayer Engineering: Electrical Pioneer, Committed to Excellence
Founded in 1962, Trayer Engineering Corporation has been a pioneer in the design and manufacture of maintenance-free vacuum
switchgear for electrical distribution systems. With experience and
patents using vacuum technology
since 1970, Trayer is the vacuum
switchgear specialist.
Trayer serves a variety of worldwide markets. Its list of users
range from utilities to municipalities, government installations,
to college and universities, along
with a wide array of industrial
customers.
An ISO 9001:2008 certified company, Trayer stands alone in its
commitment to excellence in design, quality workmanship, dependability and unparalleled customer service.
For additional product information, technical specifications, or
to discuss your specific switchgear requirements, please contact
Trayer Engineering Corporation
directly or through your local
Trayer representative.
Trayer’s Commitment to Excellent Customer Service
Trayer enjoys working with all of
our customers to provide the right
solutions for their Distribution
Automation needs. Whether you
are installing a SCADA system,
high speed Automatic Transfer
System, or just preparing for the
future, Trayer is here to help provide the safest, long lasting, field-
proven, maintenance-free switchgear designs.
The flexibility of Trayer’s modular designs allows customers to
provide input into the design and
choice of controls for their Trayer
distribution switchgear. Trayer’s
single or three-phase internally
mounted and fused potential
transformers provide a self-powered automation switchgear solution. These solutions include
current and potential transformers with the accuracy to do most
power calculations. Trayer has
been providing quality automated
switchgear solutions for 40 years.
Let Trayer help you with your
next switchgear project.
position. There are provisions
to lock the device in both the
“CLOSED” or “OPEN” position
and there is an interlock that must
be opened before you can place
the device into the “GROUND”
position (see below).
is provided mechanically by a
yellow indicating rod attached to
the trip bar of the VFI mechanism
inside the tank. This mechanical
“trip indicator” is viewed through
a clear sight glass on the face of
the switch tank near the operating
handle. When the mechanism is
tripped, the VFI handle stays in
the CLOSED position and the
yellow Trip Indicator rod (see
below) protrudes from the tank
and is visible inside the clear
sight glass. For secondary TRIP
indication, the customer can then
look to the relay to see the faulted
phase. To reset the mechanism
after it has been tripped, the operator simply pulls the operating
handle to the OPEN position.
The mechanism is responsible
for resetting itself. No additional
cocking or verification of the
OPEN / Reset position is required.
Verified by Design: Simple and Reliable
Trayer has been using vacuum
technology for more than 40 years
and has integrated decades of experience into the basic design of
our switchgear. Trayer’s operating
handles on the vacuum loadbreak
switch and vacuum fault interrupter mechanisms verify OPEN
and CLOSED positions by design.
Trayer has developed fundamental
design elements in all of our products to increase the reliability of
our switchgear and simplify their
operation.
Vacuum technology does not
provide a visible open since the
contacts are sealed within the envelope of the vacuum enclosure.
Some manufacturers attempt to
resolve this “Visible Open” issue
with the provision of a pointer
or semaphore to indicate contact
separation, yet no “Open” contacts can actually be seen. Trayer
can provide a truly visible “Open”
set of contacts by incorporating Trayer’s patented Tri-Phase
Two Position
Visible Disconnect Window
Visible Disconnect device. The
contacts on the Tri-Phase Visible
Disconnect device are viewed
through a window on the surface
of the tank and are clearly visible
(see below). The visible disconnect device is a second loadbreak
rated switch in series with either
the vacuum loadbreak switch or
vacuum fault interrupter. Building
on the simplicity of the original
Trayer designs and patents, Trayer
now incorporates two mechanically interlocked operating handles so that a line crew must break
the load with either a vacuum
loadbreak switch or vacuum fault
interrupter before gaining access
to the second operating handle for
the visible disconnect device (see
below).
Trayer has expanded this optional
technology to now include an internal ground position. There are
two interlocking features on the
visible disconnect with GROUND
Patented Tri-Phase
Interlocking Handles
The Trayer Vacuum Fault Interrupter (VFI) operating handle
operates in the same way as the
loadbreak switch operating handle. Both mechanisms’ operating handles have two positions,
OPEN and CLOSED. When in
the OPEN position, the handle is
away from the switch tank. When
CLOSED, the handle is parallel
with the face of the switch tank.
Tripping power for the VFI mechanism is supplied by a potential
transformer on Trayer’s 3000 series VFIs and by internal current
transformers on Trayer’s 4000
series VFIs. The primary TRIP
indication of the VFI mechanism
Tri-Phase Visible Disconnect
with Ground Position
Mechanical VFI
Trip Indicator
2
Submersible & Vaultmount Automation
Submersible Switch with
Visible Disconnects & Motopaks
}CAT#102VD2CM2-201(2)
3-Way Side-Mounted
Vaultmount with Motopaks
}CAT#113CGM83
3000 Series Vaultmount with
SEL Relay and Motopaks
}CAT#3112-3FVD3M2
Trayer has been providing Distribution Automation solutions since 1971. Trayer’s original
submersible vacuum loadbreak switches were
designed with automation in mind. These
round compact units were set on a mild steel,
hot-dipped galvanized stand with provisions to
mount the motor operators onto the switch and
stand assembly. The Trayer submersible “Motopak” is constructed from 304 stainless steel
and has provided nearly 40 years of field-proven
operational service. These Motopaks are fitted
with gear driven motors and have been successfully installed in some of the world’s harshest
environments.
Submersible and Vaultmount applications
come with many different requirements to get
the job done. Trayer provides many solutions
to fit the needs of our customers. Side-mounted
“saddle-type” stands allow customers to use
submersible traditionally top operable switches
as vault style switchgear. Stands are sold separately and several are prepared to add on motor
operator mounting brackets. For side-mounted
vault style applications, Trayer also offers two
sling rotation “knobs.” These knobs are welded
to the switch tank and assist with lifting a unit
off its pallet. Once in the air the construction
crews can rotate the switch in the sling onto its
side to be placed in to the “saddle” stand.
Trayer’s automation products can be fitted to
every vacuum loadbreak switch and vacuum
fault interrupter combination. Vaultmounted designs can be side mounted or bottom
mounted to fit the application. On rectangular
switchgear designs, Motopaks can be mounted
directly to the tank surface. Customers must
order optional mounting provisions at time of
construction. If the passageway for getting the
switchgear into the vault is tight, the customer
can order bolt-on automation accessories that
allow the switchgear to pass through the opening to be assembled in place.
Dry Vault SCADA Application
with Seismic Rated Stand
}CAT#3115-0CM
For dry vault applications, Trayer can provide
a lower cost automation solution by using padmount style water resistant motor operators.
Simply put, we take a single-sided padmount
design, remove the high voltage enclosure, and
build a stand to replace the base. In this photo,
Trayer has responded to another of our customer’s requests by designing a shroud to cover
the motor operators and protect the face of the
switchgear during transportation and storage
before installation. Included with the switch is
a seismic-rated stand and provisions to secure
the unit to the vault wall.
3
SCADA RTUs and
Over-current Protection
Trayer provides automated switchgear solutions in Padmount, Vaultmount and
Submersible designs. For consistency and
reliability, we manufacturer our own submersible and padmount low voltage control
cabinets. Trayer’s automation solutions are
self-powered from internally mounted and
fused potential transformers. Single-phase
or optional three-phase PTs are available for
control power, voltage monitoring and power
calculations.
Extreme Reliability Solutions
Trayer’s experience in Distribution Automation has been field-proven for nearly 40 years.
Trayer has provided many automated solutions for some very challenging applications.
Whether your project requires Differential or
Directional relaying, Primary Cable or Primary Loop Protection, High Speed 10 Cycle
Auto Transfer, SCADA control and Communication, Main-Tie-Main solutions between
multiple switchgear units, or applying Distribution Products for use as mini substations,
Trayer has the solution.
Padmount Automation - Auto Transfer & SCADA
10 Cycle - Auto Transfer System,
Single-Sided SCADA
}CAT# 3800C9VD4 - ATS
Trayer’s premier 10 cycle Automatic Transfer
System (ATS) is a step above the rest. Trayer has
designed a padmounted high speed auto transfer system for your most critical loads. This ATS
switchgear design includes six internally mounted and fused potential transformers, three on
each of the two incoming source ways. The six
voltage inputs can be read locally or through
SCADA, and are accurate for calculations. Two
600 Amp VFI tap ways provide the over-current
and fault protection for your loads. CT current
information can be read locally in the control
or through SCADA. The above unit includes a
newly redesigned control cabinet to withstand
the harshest coastal applications.
Auto Transfer System - Double-Sided
for Replacement of Existing Equipment
}CAT# 3805A13VD3 - ATS
Trayer’s Automatic Transfer Systems offer very
reliable solutions for your most critical customers. This three source Auto Transfer System
utilizes two utility feeds and a standby generator to supply power to this customer’s critical
load. A three source vacuum loadbreak switching scheme combines Trayer’s proven technology with today’s advancements in automation,
communication and relaying. Trayer has programmed the SEL 451 automation platform to
provide the auto transfer logic, motor control,
and fault blocking. This particular design uses
three internally mounted and fused protected
potential transformers to provide control power
from the incoming utility and generator sources.
3000 Series Single-Sided SCADA
Switchgear with RTU
}CAT# 3810C9VD4M6
Auto Transfer System - Single-Sided
with Optional External PT Power
}CAT# G3800C9M3- ATS
Trayer’s switchgear, designed for remote Supervisory Control and Data Acquisition (SCADA)
applications, is available in many shapes, sizes,
and control options. Trayer’s standard switchgear designs are coupled with customer specified relays and remote terminal units (RTU) to
complete automation packages for our customers. Trayer uses 3000 Series VFIs built on nearly
20 years of field-proven Trayer VFI designs and
incorporate the latest advancements in vacuum
technology and microprocessor-based relay and
communication controls.
The 304 stainless steel, single-side access, Auto
Transfer System combines vacuum loadbreak
switching and vacuum fault interrupter protection to create a powerful automatic transfer and
over-current protection system. Trayer uses the
SEL 451 automation platform and dual channel
over-current relay to provide the auto transfer
logic, motor control, over-current protection
and fault interruption. This particular design
uses externally mounted potential transformers
connected to the incoming ways through a fused
200 Amp interface to provide control power.
G3805/G3815 Double-Sided SF6
Insulated SCADA 3000 Series VFI
}CAT# G3805C9VDG4
800/810 Liquid & G800/G810 SF6
Insulated Single-Sided Switch Only
}CAT# 800C10VD4M30
Trayer’s double-side, SF6-insulated 3805/3815
series vacuum fault interrupters combine vacuum loadbreak switching and vacuum fault
interrupter and relay protection in standard
padmount configurations and designs to replace
original equipment on their existing foundations. Built on nearly 20 years of field-proven
and patented VFI designs, this equipment incorporates the latest advancements in vacuum
technology and microprocessor-based relay
controls. Optional Tri-phase Visible Disconnect
with Ground Position is available on vacuum
loadbreak switch and vacuum fault interrupter
ways.
The maintenance free, 304 stainless steel Trayer
8_0 Series switchgear represents our single-side
access padmounted switch-only units. This unit
is designed with “to the left” slanted bushings
and shown with the optional tall high voltage
enclosure and mounted motor operators. Trayer
can easily modify most designs to match your
existing bushing layouts. The vacuum loadbreak switch mechanisms are 600 Amp rated
and provide 10,000 maintenance free operations
in liquid and 3,000 operations in SF6; perfect for
SCADA applications.
4
Submersible Switchgear
Oil Fused Cut-out Replacement VFI
}CAT#4111-0AM2
Trayer’s new single-phase Oil Fused Cut-out replacement design is 40% smaller than our previous model. This 27kV – 600Amp - 12.5kA
vacuum fault interrupter has been redesigned to
provide the line crews with more space in their
vaults or manholes. The unit is constructed from
304 stainless steel and comes with a CT powered
submersible over-current relay. This unit stands
out by including a “truly visible” single-phase
visible disconnect device in series with the vacuum fault interrupter. As with all Trayer visible
disconnect devices, this visible OPEN contact is
an “isolation” point and is safe to use for testing
and grounding of cables attached to the equipment. Several mounting options are available.
4-Way Wet Well with Visible Disconnect
}CAT#102BSF2BVD2
If you are looking for a low cost reliable solution for underground protection look to Trayer’s
15kV, 25kV, and 35kV submersible switch and
fuse gear. Trayer’s Universal Fuse Well has been
successfully providing protection to underground circuits for over 30 years. This Trayer
custom design integrates the 200 Amp bushing
into the fuse cap, making it nearly “fool proof ” to
pull a fuse under load. The line crew will remove
the 200 Amp loadbreak elbow and park it before
gaining access to remove the fuse. After replacing
the fuse and installing it into the switch tank, the
line crew will then use the rated 200 Amp elbow
to energize the circuit. It’s safe and cost effective.
Full range current limiting fuses are available up
to 200 amps at 15kV.
5
Liquid Insulated Submersible
15, 25 and 35 kV Switch Only
}CAT#102C
3-Way Submersible Switchgear
with Visible Disconnect
}CAT#102SCM1
Trayer’s submersible switchgear provides reliable switching solutions in the harshest underground environments. These two, three
and four way switches are constructed from
304 stainless steel and are round and sized to
pass through common manhole openings. The
vacuum loadbreak switch mechanisms are 600
Amp rated with 10,000 mechanical operations
in liquid dielectric and 3,000 operations in SF6.
Customers can order their equipment with either 600 Amp bushings or 200 Amp bushing
wells. These switches have been installed and
operating in some of the harshest environments
since 1970.
Trayer’s round submersible switchgear designs
are also available with Trayer’s patented TriPhase Visible Disconnects. These submersible
designs come with submersible covers for the
windows to keep dirt and debris from building
up and blocking the view of the open contacts
through the visible disconnect window. The
visible disconnects in the OPEN position provide a safe working isolation point for testing
and grounding of 600 Amp cables without removing them from the bushings.
3000 Series SF6 Insulated Vacuum
Fault Interrupter Protection
}CAT#G3102-1CGM1
4000 Series Submersible with
Ganged VFI Mechanisms
}CAT#4101-2C
Trayer’s 3000 series submersible 15kV and 25kV
Vacuum Fault Interrupter switchgear offers compact designs for various underground applications. This 34-½ inch compact three way SF6
insulated model includes a 600 Amp switch and
two 600 Amp VFI protected ways. Like most of
Trayer’s 3000 series VFIs, this unit is designed
with CTs and a PT mounted inside the switch
tank. The SEL 501-2 over-current relay is located
in a 304 stainless steel submersible enclosure to
be mounted on the vault wall. Trayer manufactures the low voltage enclosures and provides
gas-blocked submersible connectors and cabling
for easy installation.
Trayer’s 4000 series submersible 15kV and 25kV
Vacuum Fault Interrupter protected switchgear
is a CT powered single-phase trip VFI design.
This 34-½ inch compact three way design helps
to increase customer reliability numbers by being
able to trip either single or three-phase based on
the relay and settings. This unit is shown with
optional rope operator provisions and circuit tag
holders.
Submersible Switchgear
4-Way Wet Well Fuseholder
}CAT#102S2BSF2BM3
4-Way Switch & Fuse
}CAT#104BSF2BM18
4000 Series 4-Way VFI Protection
}CAT#G4102-2BM1
Trayer’s 15kV, 25kV, and 35kV submersible
switch and fuse switchgear designs are easily
modified to meet our customer’s growing underground needs. This four way switchgear design,
with two switched ways and two fuse protected
ways, was an answer to a customer’s request to
have their submersible equipment set up more
like their double sided Padmount “9” configuration, with loadbreak switches on one side and
fuse protected ways on the other side. It also
made it easier for their crews to get access to the
equipment from the open working sides of their
pop-up cover vault doors. This unit is shown
with optional Tri-Phase Visible Disconnects and
window covers. Full range current limiting fuses
are available up to 200 Amps at 15kV.
This Trayer submersible switch and Universal
Fuse Well unit includes three-phase vacuum
loadbreak switches in series with Trayer’s
Universal Fuse Wells permitting three-phase
OPEN and CLOSE of the circuit. Full range
current limiting fuses provide a safe, fast interrupting and effective way to protect your
underground circuits. Square and rectangular
designs are available to fit most vault openings.
Trayer’s 4000 Series 15kV and 25kV, single
phase trip, submersible VFIs offer the ease of
resetting a vacuum fault interrupter instead of
replacing a fuse. These 4000 Series products
are available in several configurations and footprints. Trayer supplies submersible rated, CT
powered, over-current relays with 24 of the
most commonly used fuse and relay curves
programmed into the relay. These relays are
“hot swappable” due to Trayer providing an automatic internal CT shorting circuit inside the
switch tank. This permits customers the opportunity to test, replace, or upgrade their relays in
the future without de-energizing the switchgear.
3-Way Submersible VFI Protcetion
}CAT#3111-2BM8
4-Way Submersible Switchgear
with Optional Visible Disconnects
}CAT#104CVD4M1
3000 Series 4-Way VFI Protection
with Visible Disconnects
}CAT#G3102-2BVDG4M1
Trayer’s 3000 series 15kV and 25kV Vacuum
Loadbreak Switch (VLS) and Vacuum Fault Interrupter (VFI) mechanism’s modular designs
make modifications easy. Featured here is a
unit with four ways and each way includes the
patented Tri-phase Visible Disconnect devices
in series. This rectangular design allows for
easy replacement of any loadbreak switch with
a 3000 series VFI mechanism. This design is
available up to 6 ways with any combination and
placement of switches and interrupters.
Trayer offers a Tri-phase Visible Disconnect device with an optional internal ground position.
This three position (CLOSE/OPEN/GROUND)
mechanism is available in SF6 and liquid insulated equipment. Like its two position (CLOSE/
OPEN) counterpart, this three position mechanism’s operating handle interlocks with either
the vacuum loadbreak switch or 3000 series
vacuum fault interrupter handles, so that all load
and fault interruption is performed in the vacuum contact and not in the dielectric. A larger
viewing window is provided so that line crews
can clearly see the contacts in all three positions.
Trayer’s 3000 series 15kV and 25kV Submersible Vacuum Fault Interrupter switchgear is a
smaller design of Trayer’s original 2000 series
VFI patented in 1979. This smaller VFI frame
allows for compact vacuum loadbreak switch
and VFI designs to provide three-phase VFI
protection in the distribution circuit. The 3000
series products come standard with substation
class SEL over-current relays on board. Trayer
mounts all the current transformers and potential
transformers inside the tank. All wire penetrations are O-ring sealed into the low voltage control cabinet welded onto the switch tank. A fiber
optic communication cable is supplied so that the
relay technician doesn’t need to get into the vault
to download information or change settings.
6
Padmount Switchgear Single-Sided
4800 & 4810 Series:
Single-Phase 4000 Series VFI
}CAT# 4800B1
4800 & 4810 Series:
Single-Phase 4000 Series VFI
}CAT# 4810C1VDS3
4800/4810 Liquid & G4800/G4810 SF6
Insulated Single-Phase 4000 Series VFI
}CAT# G4800A89
800/810 Liquid & G800/G810 SF6
Insulated Switch Only
}CAT# 810C10VD4M33
800/810 Liquid & G800/G810 SF6
Insulated 15 & 25kV Switch Only
}CAT# 800C27VD5M1
G3800/G3810 SF6 Insulated
15 & 25kV, Three-Phase VFI
}CAT# G3800B82
The Trayer 4000 Series single-side access singlephase vacuum fault interrupter was introduced
in 2004. The single-phase VFIs and accompanying CT powered single-phase trip or three-phase
trip relays provide multiple protection options
for our customers. This padmount two way single-phase unit can be used to replace cable junctions and protect single-phase underground tap
circuits. Many design options are available.
The maintenance-free, 304 stainless steel Trayer
8_0 Series switchgear represents our single-side
access padmounted switch-only units. This unit
is shown with Trayer’s cabinet style enclosure
and “to the right” slanted bushings that pattern some older style switchgear. The vacuum
loadbreak switch mechanisms are 600 Amp
rated and provide 10,000 operations in liquid
and 3,000 operations in SF6. Trayer’s patented
Tri-Phase Visible Disconnect devices with interlocking handle designs are optional on all
switched ways. The visible disconnect displays
a truly visible “OPEN” set of contacts and provides a safe “isolation point” to test cables without the need to remove them.
7
The Trayer 4000 Series single-side access liquid
insulated single-phase vacuum fault interrupter
was introduced in 2004. The single-phase VFIs
and accompanying CT powered or SEL singlephase trip relays provide multiple protection
options for our customers. These 27kV rated
devices can be used for 600 Amp load switching
as well as 600 Amp VFI protection. Customers can order their 4000 series VFIs with either
600 Amp bushings or 200 Amp bushing wells.
Trayer also offers single-phase 600 Amp visible
disconnect devices.
The maintenance-free, 304 stainless steel Trayer
8_0 Series switchgear represents our single-side
access padmounted switch-only units. Trayer’s
single side access 800/810 and G800/G810 Series units are modular in design and available up
to 8 ways. These units are available with bushings that slant to either the left (as shown) or to
the right. Trayer’s patented Tri-Phase Visible
Disconnect devices can be lowered to a position
beside the bushings providing an even lower
switch profile.
The Trayer 4000 Series single-side access liquid
or SF6 insulated single-phase vacuum fault interrupter was introduced in 2004. The singlephase VFIs and accompanying CT powered
single-phase or three-phase trip relays provide
many protection options for our customers.
These 27kV rated devices can be used for 600
Amp load switching as well as 600 Amp VFI
protection. Customers can order their 4000 series VFIs with either 600 Amp bushings or 200
Amp bushing wells. Custom designs are available. This design is to replace another manufacture’s four way padmount unit by matching the
size and bushing layout.
The 304 stainless steel G38_0 Series combines
vacuum load-break switching and vacuum fault
interrupter protection in standard configurations
and design to replace original equipment on
their existing foundations. Trayer’s 3000 Series
Vacuum Fault Interrupters introduced in 1999
are based on our original 2000 Series VFI design
patented in 1980. The 3000 Series VFI incorporates the latest advancements in vacuum technology and microprocessor-based relay controls.
Optional Tri-Phase 3 position Visible Disconnect
with Ground is available on vacuum loadbreak
switch and vacuum fault interrupter ways. These
units are available with optional tall high voltage
enclosures for SCADA motor operators.
Padmount Switchgear Double-Sided
805/815 Liquid & G805/G815 SF6
Insulated Switch Only
}CAT# 805C10VD4
802, 812 & 822 Liquid Insulated
Switch with Fuse Protection
}CAT# 812B9
3000 Series Liquid Insulated VFI
}CAT# 3815B9
3805/3815 Liquid Insulated
Three-Phase 3000 Series VFI
}CAT# 3805E82VD6M1
4000 Series VFIs with
Single-Phase Visible Disconnects
}CAT# 4805C9VD2S6
4000 Series Padmount with
Ganged VFI Mechanisms
}CAT# 4815C9
The maintenance-free, 304 stainless steel, Trayer
8_5 Series represents our double-side access
padmounted switch-only units. The footprint
and horizontal bushing designs are sized to
make an easy retrofit conversion from live front
air-insulated switchgear to sealed dead front using the existing foundation. The vacuum loadbreak switch mechanisms are 600 Amp rated.
Every switched way comes prepared with motor
mounting provisions for SCADA motor operators. These units can be ordered with low profile bases and lift up hoods or with cabinet front
high voltage enclosures.
The maintenance-free, 304 stainless steel Trayer
38_5 Series combine vacuum loadbreak switching and vacuum fault interrupter and relay protection in standard configurations and design
to replace original equipment on their existing
foundations. This modular, double-sided, 6 way
design allows for many combinations of loadbreak switch and vacuum fault interrupter configurations. Cabinet style enclosures with lift up
lids for these longer units reduce the weight of
“old style” hoods. The horizontal operating handles are set up to add SCADA motor operators
in the future. Optional Tri-phase Visible Disconnect is available on both vacuum loadbreak
switch and vacuum fault interrupter ways.
The 304 stainless steel Trayer 802, 812, and 822
Series are the backbone of Trayer’s Padmount
line and have been field proven for over 35 years.
These 15kV, 25kV and 35kV class switchgear offer 600 Amp vacuum loadbreak switches with
full-range, current-limiting fuse protection.
Featured are Trayer’s Universal Fuse Wells which
accommodate liquid immersed current limiting fuses up to 200 Amps at 15kV. The Trayer
Universal Fuse Well is designed with safety in
mind. Trayer’s design integrates the bushing well
into the fuse cap assuring that a lineman never
makes and breaks load with the fuse. This “fool
proof ” design requires that the cable is removed
prior to getting access to the fuse cap.
Trayer’s 4000 Series offers the same footprint and
bushing layout design for easy retrofit applications.
This product line differs from the 3805 Series by
adding the versatility of single-phase trip 4000 Series vacuum fault interrupters. The single-phase
VFIs and accompanying single-phase or threephase trip relays are CT-powered from internallymounted current transformers. They only require
a minimum of 15 amps per three-phase way in
order to stay active. If there is a complete loss of
power, the relay restores and can trip the VFI within as little as 10 milliseconds. Trayer offers singlephase visible disconnects in series with 4000 Series
VFIs permitting customers to leave their 600 Amp
cables attached while testing and grounding.
Double-sided, 4 way designs are available in
standard 9, 11, and 12 configurations to upgrade
or replace original fused equipment on their
existing foundations. A typical 12 configuration is designed with a 600 Amp loadbreak
switch IN, two 200 Amp VFI load tap ways
and a 600 Amp three phase VFI OUT. The 600
Amp VFI provides primary cable fault protection and interruption, isolating a fault mid circuit. This increases reliability by keeping more
of your customers powered during a primary
cable fault. Optional Tri-phase Visible Disconnect devices are available on both the vacuum
loadbreak switch and vacuum fault interrupter
mechanisms.
The Trayer 48_5 Series offers the same footprint
and bushing layout design as the 8_5 and 38_5
Series units offering easy retrofit applications
of existing switchgear. There are many designs available to replace live front air-insulated
switchgear to old oil switches. This product line
differs from the 38_5 Series by adding the versatility of single-phase trip 4000 Series vacuum
fault interrupters and CT powered over-current
relays. This particular switch design offers single
or three-phase trip with three-phase Open/Reset/Close.
8
Submersible Features & Control Options
9
Submersible RTU Control
Trident Submersible 3-Phase
OPEN/CLOSE Shotgun Adapter
Remote Submersible Relay Enclosure
Fiber Optic Communication
Universal Fuseholder - Cap Guides &
Quick Close Clamps
Bolt on Motor Operator Mounting
Bracket and Stand
360o Open Rope Operator with
Upper Stanchion Rings
360o Rope Close Operator Tank Ring
External Ground & Relay Cut Out Switch
Slide Bar Interlock for Drywell Fuses
CT Powered Submersible Relay
Submersible Motopak
Padmount Features & Control Options
Visible Disconnect with
Ground Position
Drain Valve with Sampler
Internal Potential Transformers
Single-Phase Visible Disconnects
Liquid Level Gauge
Optional External PT Control Power
Fuse Wipes
Trident Padmount 3-Phase
OPEN/CLOSE Shotgun Adapter
External Status Position Switches
Padmount Linear Actuator
Option for Custom Enclosures
and Cable Ways
Padmount Remote Pedestal
Control Cabinet
10
The
Power and Experience
to
Deliver
Trayer Engineering Corporation
898 Pennsylvania Avenue • San Francisco • California • 94107
(415) 285-7770 • (800) 377-1774 • Fax (415) 285-0883 • sales@trayer.com • www.trayer.com