EPD 12/24Vdc 30A Secondary Protection Device
EPD 12/24Vdc 30A
Secondary Protection Device
Features
• Series hybrid
TVSS technology
• Universal design
for 12V or 24V
applications
• 30A series filter
• High surge
rating provides
a high level
of protection
and long
operational life
• Low let-through
voltage
• RFI/EMI filtering
• Status indicator
• AAR terminals
• 5 year limited
warranty
Detailed Specifications for ERICO’s
EPD1224ATAAR 12/24Vdc Secondary Protector
Lightning transients and surges are a
major cause of expensive electronic
equipment failure and system
disruption. The EPD family of Surge
Protection Devices (SPD) offer
economical and reliable protection
from power transients with the
convenience of easy installation.
EPD’s are expressly designed for the
railways unique electrical, mechanical
and environmental requirements.
The EPD1224ATAAR is designed for use
on both 12 and 24Vdc systems. The
unique voltage selection link
allows the one unit to be used on
either 12 or 24V systems. The unit is
designed to cater to installations where
an additional battery cell may need to
be added to gate crossings.
For 0-30A circuits the EPD1224ATAAR
is installed in-line. The hybrid design
incorporates an EMI/RFI filter that
provides efficient noise attenuation
to ensure even the most sensitive
equipment is protected from noise
and transient activity.
To aid in the maintenance of the
device, a high reliability status indicator
shows that surge protection is
operational. If the unit's surge capacity
has been exceeded, the indicator will
extinguish indicating replacement
is required. To maintain the highest
operational level of important rail
equipment, filtered power is still
provided to the load under such a
condition.
EPD 12/24Vdc 30A
Secondary Protection Device
EPD1224ATAAR 12/24Vdc Secondary Protector
SPECIFICATIONS
Operation:
Model
Nominal Voltage Un
Distribution System
Max. Cont. Operating Voltage Uc
Max. Load current
Protection:
Aggregate Surge Rating
Surge Life
Protection Modes
Technology
Performance:
Voltage Protection Level Up (L-L)
@ Cat A1, 200A 100kHz
@ Cat B3, 3kA 8/20µs
@ 10kA 8/20µs
@ 20kA 8/20µs
EPD1224ATAAR
12Vdc
24Vdc
2 wire
18V
36V
30A
2-3/8
2-3/8
Status
Indicator
Light
3-1/2
20kA 8/20µs
>5,000 6kV/500A impulses
+Ve to -Ve
Hybrid (MOV/Filter/Silicon)
TVSS & series EMI/RFI filter
2-3/8
3-1/2
4-3/4
5-1/4
5-3/4
7V
16V
26V
34V
8V
16V
30V
41V
INSTALLATION
Twist
Wiring
Filtering:
Filtering @100kHz -65dB
Indication:
Status LED status indicator
AAR Hardware
Supplied
Battery
Charger
Physical Data:
Dimensions 5.5” x 5.75” x 3.5”
(140mm x 146mm x 89mm) approx.
Weight 2.5lb (1.1kg) approx.
Enclosure ABS plastic. UL 94-VA flame rated.
NEMA-1
Connection AAR terminals (#14 x 24 thread)
Mounting Wall mount
Temperature -40°C to +70°C (-40°F to +158°F)
Humidity 0 to 90%
Warranty 5 years
Test Standards:
Surge Rated to Meet AREMA requirements
ANSI/IEEE C62.41.1-2002
Cat A, Cat B, Cat C
ORDERING INFORMATION
Part Number
Description
EPD1224ATAAR
Secondary TVSS protector for 30A 12 & 24Vdc
Sensitive
Electronics
EPD
Unit
Batteries
Install the TVSS series filter as close
to the sensitive electronic load as
possible. It is important to keep
wires short between the equipment
and the protector. All power leads
should be twisted together and
the input and output wire leads
separated from each other. The
mounting flange design and
footprint provides flexibility of
placement near the sensitive
electronics and allows for easy
replacement in existing circuits.
Due to a policy of continual product development, specifications are subject to change without notice.
WARNING
ERICO products shall be installed and used only as indicated in ERICO’s product instruction sheets and training materials. Instruction sheets are available at www.erico.com and from your ERICO customer service
representative. Improper installation, misuse, misapplication or other failure to completely follow ERICO’s instructions and warnings may cause product malfunction, property damage, serious bodily injury and death.
ANSI is a registered trademark of the American National Standards Institute. AREMA is a registered trademark of the American Railway Engineering and Maintenance-of-Way Association, Inc.
IEEE is a registered trademark of The Institute of Electrical and Electronics Engineers, Incorporated. UL is a registered trademark of Underwriters Laboratories, Inc.
Copyright ©2006, 2011 ERICO International Corporation. All rights reserved.
CADDY, CADWELD, CRITEC, ERICO, ERIFLEX, ERITECH, and LENTON are registered trademarks of ERICO International Corporation.
Rail Electrical Products Customer Service
34600 Solon Road, Solon, Ohio 44139
ph: 800-447-7245
fax: 800-309-8961
www.erico.com
R604S-WWEN
R819LT11WWEN
01M0711
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