Relevant Standards
IEEE Std C37.74™ – 2003 standard
IEEE Standard Requirements for Subsurface,
Vault, and Pad-Mounted Load-Interrupter Switchgear
and Fused Load-Interrupter Switchgear for Alternating
Current Systems Up to 38 kV
IEEE Std C37.60™ – 2003 standard
IEEE Standard Requirements for Overhead, Pad- Mounted,
Dry Vault, and Submersible Automatic Circuit Reclosers
and Fault Interrupters for Alternating Current Systems
Up to 38 kV
TavLoc Pad-Mounted Switchgear
15KV, 1200A, 29 kAIC
IEEE Std C57.12.28™ – 1999 standard
Standard for Pad-Mounted Equipment – Enclosure
Integrity
For more information, contact McClellan Industries:
MICHAEL McCLELLAN, JR.
EMAIL: jr@mcclellanindustries.com
TEL: 404-694-6050
FAX: 770-399-6120
WEB: www.McClellanIndustries.com
Visible ground switch, CTs, 900A dead-front bushings
BETTER. FASTER. SMALLER.
Pad-Mounted Switchgear Solutions
TavLoc Pad-Mounted Switchgear
15KV, 1200A, 29 kAIC
Highest Available Ratings in the Industry
McClellan Industries pad-mounted switchgear is available
with 2000 amp continuous interrupters at 15kV, with up to a
4000A cross bus. McClellan Industries designs, engineers
and manufactures its pad-mounted Switchgear utilizing,
A-60 Galvanneal steel, copper bus (silver- or tin-plated),
Sentry Latch (3-point, dual-action, positive verification
latch), stainless steel exterior hardware, and welded construction.
Enclosures can be fabricated from a variety of materials including mild steel, stainless steel, aluminum, painted galvanized,
painted galvaneal.
Enhanced Safety via Redundant Interlocks
The GroundLoc system (patent pending) provides a series
of interlocks that prevent the operator from grounding the
visible ground switch into a live circuit via a mechanical
interlock. Should the mechanical interlock somehow be
defeated, an electrical interlock is present that will trip the
breaker if the GroundLoc switch leaves the UNGROUNDED
position and also prevents the breaker from closing unless
the Groundloc switch is in the UNGROUNDED position.
GroundLoc
Switch
Safety is
our highest
priority.
Automatic Transfer Switch
The TavLoc FTS (Fast Transfer Switch) Is made up of (2)
1200A Tavrida breakers and a Schweitzer SEL-451 relay,
providing an unparalleled value among medium voltage
automatic transfer switches. Both open and closed transition
schemes are available.
Source 1
Source 2
1200A
1200A
ISM-HD -111, -112, -114, -116
Control Module Type
CM15_1-220
Rated Data
8-Way Switchgear Designs
Rated voltage (Ur)
to 15 kV
Rated current (Ir)
to 2000 A
Rated power frequency withstand voltage (Ud)
The versatile construction of McClellan Industries padmounted switchgear allows construction of configurations
previously available only as metal-clad switchgear. The
8-way switch allows main-tie-main functionality with up
to five 800A feeders, fed by a 4000A horizontal bus.
28 kV
Rated lightning impulse withstand voltage (peak) (Up)
95 kV
Rated short-circuit breaking current (Isc)
29 kA @ 15 kV
31.5kA @ 5 kV
Rated peak withstand current (Ip, close and latch)
to 82 kA
Rated short-time withstand current (Ik)
to 31.5 kA
Rated duration of short circuit (tk)
2000A
MAIN
2000A
TIE
2000A
MAIN
800A
FEEDER
800A
FEEDER
800A
FEEDER
4s
Rated frequency (fr)
800A
FEEDER
50/60 Hz
Switching Performance
Visible Ground
The safety of the operator is of the highest priority. Therefore,
all McClellan Switchgear comes standard with an integral
grounding switch, allowing maintenance personnel to visually
confirm the circuit is grounded before touching previously
live parts.
ISM Type
800A
FEEDER
Mechanical life (CO-cycles)
30 000
Operating cycles at rated current (CO-cycles)
30 000
Operating cycles at rated–short circuit breaking current (O-operations)
50
Closing time
52 ms
Opening time, not more than
27 ms
Break time 1), not more than
Rated operating sequence (CM/TEL...-12-01A)
The Tavrida Breaker
In the past, manufacturers have occassionally been
unable to certify a transformer as Factory Mutual (FM)
approved due to the fact that the I2t valves specified by
FM could not be achieved. This is because most manufacturers
of vacuum interrupter switchgear can achieve a 3 to 5
cycle interrupting time at best. The heart of McClellan
switchgear is the Tavrida breaker, which can be configured
to interrupt in 1.5 cycles*.
Standards
Field Replaceable Interrupter
Type of driving mechanism
Design class with regard to severity of service conditions in accordance with IEC 60932
International testing standards
Class 4M4
Other Data
Resistance of main circuit
Available pole center distances
Design, switching capacity of auxiliary contacts
The Linear Magnetic Breaker
< 22 μOhm
150mm, 180mm, 210mm, 275mm
Monostable magnetic actuator
Number of available auxiliary contacts
All McClellan Industries switchgear is based on linear
magnetic breakers. Therefore, there are no levers or
gears to turn and, no motor operators which are prone
to misalignment and malfunction. While other manufacturers
must quote costly adders to provide motor operators,
remote operation is standard on TavLoc switchgear.
Other manufacturers’ switchgear requires maintanence
personnel to enter the medium voltage compartment
in order to operate the switchgear. TavLoc switchgear
completely isolates the medium voltage section from
the control section, providing maximum safety for the
operator.
Class 1
IEC 62271-100 , GB 1984-2003,
ANSI C37.09
Mechanical vibration withstand capability according to IEC 60271, IEC 60068
The Tavrida breaker carries a 5-year warranty and is
rated for 30,000 operations. In the highly unlikely event
that the breaker requires service or replacement, McClellan
Industries switchgear is designed to allow field replacement
of the breaker, requiring only a socket set and cordless drill.
Designed with Arc Flash Mitigation in Mind
37 ms
O-0.1s-CO-10s-CO
Rated power frequency test voltage
2 kV
Maximum current for 125 V DC, ohmic load
0.5 A
Maximum current for 125 V DC, inductive load (t=20 ms)
0.03 A
Maximum current for 250 V DC, ohmic load
0.25 A
Maximum current for 250 V DC, inductive load (t=20 ms)
0.03 A
Maximum current for 125 V AC, ohmic load
5A
Maximum current for 125 V AC, inductive load (cosj =0.3)
5A
Maximum current for 250 V AC, ohmic load
5A
Maximum current for 250 V AC, inductive load (cosj =0.3)
5A
Each compartment can be configured in one of the following ways:
6NO + 6NC
• 800A Protected way
• 2000A Protected way
• 800A Disconnect - breaker only
• 2000A Disconnect - breaker only
• Fuses
• Fused contactor - MV motor starter
• 1250A Loadbreak switch
* When specified.