Special Purpose Fuses
Special Purpose Fuses
American Fuses
Surge Suppresion Fuses
TPMOV
Thermally protected mov
The Ferraz Shawmut Thermally Protected MOV
has been developed to assist in eliminating the
failure characteristics of Metal-Oxide-Varistors. The
TPMOV is a fail-safe device. It is composed of a
voltage clamping device and a disconnecting
apparatus that monitors the status of the metal-
oxide disk. In the event that the disk is
approaching breakdown it is effectively
disconnected from system power. The TPMOV is
rated for 40ka of 8/20us surge current. The
TPMOV ratings are available from 150V to 550V.
The TPMOV has been designed with two built in
isolated indicating features. The first is a visual
indicator. When the unit has disconnected from
system power, two isolated pins will be noticed
atop the TPMOV enclosure. The second feature is
a remote indicator composed of a N/O micro-
switch. In the event that the TPMOV has
disconnected system power the switch will
change status. These features lower costly
engineering time that would be required for
traditional MOV products.
Ratings
• 150V to 550VAC/100KA I.R.
• 40ka 8/20µs Withstand
Approvals
• UL 1449 2nd Edition
Recognized
Layout
The TPMOV footings are similar* to that of
equivalent voltage ratings of traditional 25 to
40mm MOV's. The TPMOV can be utilized on
existing systems that utilize traditional MOV’s
without costly board redesigns.
*refer to dimensional drawings on next page.
Features/Benefits
•
•
•
•
High Energy Capacity
Consistent footprint with 25–40mm MOV’s
Built-In Visual/Remote Indication
Fail-Safe Operation
Application:
•
•
•
•
•
•
•
•
Transient Voltage Surge Suppressors
AC/DC Distribution Systems
High Voltage Power Supplies
Telecommunications Equipment
Motor Control Systems
Computer Related Products
PLC Applications
Power Transfer Switches
Typical Application
Source
Load
SP
32
12/04
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