Surge Protective Devices
STV25K Series
Instruction Manual
While every precaution has been taken to ensure accuracy and completeness in this manual, EGS Electrical Group, LLC. assumes no responsibility,
and disclaims all liability for damages resulting from use of this information or for any errors or omissions. The SolaHD and Emerson logos are regis-
tered in the U.S. Patent and Trademark Ofce. All other product or service names are the property of their registered owners. ©2011 EGS Electrical
Group, LLC. All rights reserved. Specications are subject to change without notice.
Contents
1.0 Installation & Operation ................................................................................ 4
1.1 Environment ............................................................................................................ 4
1.2 Mechanical Dimensions .......................................................................................... 4
1.3 DIN Rail Mounting ................................................................................................... 5
1.4 Supplemental Enclosures ....................................................................................... 5
1.5 Maximum Current Capability ................................................................................... 5
1.6 Recommended Fuse ............................................................................................... 5
1.7 Nominal Voltage ...................................................................................................... 5
1.8 Summary Alarm Contacts ....................................................................................... 6
1.9 Conductor Size........................................................................................................ 6
1.10 Grounding ............................................................................................................... 6
1.11 Voltage Protection Ratings ...................................................................................... 6
1.12 Wiring Connections ................................................................................................. 6
1.13 Applying Power ....................................................................................................... 6
Table 1: Voltage Ratings & Power Source Congurations .............................................. 7
2.0 Specications ................................................................................................ 8
Table 2: Technical Specications .................................................................................... 8
3.0 Registration & Warranty ............................................................................... 9
3.1 Product Registration................................................................................................ 9
3.2 Warranty Information ............................................................................................... 9
STV25K Series Instruction Manual • 4
1.0 Installation & Operation
The SolaHD STV25K Series Surge Protective Device is a high-quality transient
diversion system designed to protect sensitive equipment from damaging transient
voltage surges resulting from load switching, lightning strikes, and other sources.
The installer should perform the following steps to ensure a quality installation.
Please read all instructions before starting the installation of this product. These
instructions do not replace national or local electrical codes. Check applicable
codes to ensure compliance.
! DANGER! Only qualied personnel should install or service this system. Elec-
trical safety precautions must be followed when installing or servicing this equipment.
To prevent risk of electrical shock, turn off and lock out all power sources to the unit
before making electrical connections or servicing.
1.1 Environment
The unit is designed for indoor operation in an ambient temperature range of
-40°C to +60°C (-40°F to +140°F), with a relative humidity of 0% to 95% non-
condensing.
Do not install in areas with excessive dust, corrosive vapors, ammable materials,
or explosive atmospheres.
1.2 Mechanical Dimensions
STV25K Series Instruction Manual • 5
1.3 DIN Rail Mounting
1. Tilt unit as illustrated.
2. Put unit onto the DIN rail.
3. Push unit downward until it stops.
4. Push at the lower front edge to lock.
5. Gently shake the unit to ensure that it is secure.
NOTE: Press the button located at the top (rear) of the enclosure to unlock and
remove from the DIN rail.
1.4 Supplemental Enclosures
The STV25K must be installed inside an enclosure and located to prevent acci-
dental contact with terminals during maintenance and service.
1.5 Maximum Current Capability
The total current draw in which the STV25K may continuously handle is 20 A.
NOTE: Overloading the unit can cause permanently damage.
1.6 Recommended Fuse
Bussman type SC-25 Class G, rated 250 V ac minimum; 25 A maximum or
equivalent.
1.7 Nominal Voltage
The maximum continuous operating voltage (MCOV) for model STV 25K-10S is
150 V ac; 275 V ac for model STV 25K-24S.
NOTE: Failure to use the unit at its rated voltage can permanently damage the
unit or provide inadequate surge protection.
STV25K Series Instruction Manual • 6
1.8 Summary Alarm Contacts
Summary alarm Form C (1 N.O. and 1 N.C.) relay contacts rated 125 V ac, 5 A
maximum are provided for remote indication of protection status. Connections
can be made to these terminals using #18 AWG conductors.
1.9 Conductor Size
The conductor size to the input and output of the STV25K ranges from #14 AWG
to #10 AWG.
1.10 Grounding
Input and output ground terminals must be connected for proper operation. This
grounding is not only required for safety, but also for equipment performance.
Incorrect grounding can reduce or impede the operation of the unit.
1.11 Voltage Protection Ratings (VPRs)
To maintain the voltage protection ratings marked on these products, as obtained
by Underwriters Laboratories, Inc. in accordance with ANSI/UL 1449, 3rd edition,
the Standard for Safety, Surge Protective Devices (SPDs), #12 AWG wire must
be utilized to connect the STV25K to your protected load. Connections made with
conductors other that #12 AWG may result in different VPRs.
1.12 Wiring Connections
Before making connections to the unit, verify that the unit model number and
nameplate voltage rating are appropriate for connection to the intended power
source. See Table 1 for voltage rating applications with typical power source
congurations.
1.13 Applying Power
Apply power to the unit and ensure status indications are normal. Under normal
conditions, the green LED is illuminated.
If the green LED is not illuminated, check all connections and ensure reliable and
proper voltages are supplied to the unit. For further assistance, please contact
SolaHD Technical Support at (800) 377-4384 or (847) 268-6651 or by e-mail at
solahd.technicalservices@emerson.com.
STV25K Series Instruction Manual • 7
Table 1: Voltage Ratings & Power Source Congurations
Model:
STV25K-10S
Nominal Voltage (50/60 Hz):
120 V ac
System Conguration:
Single-phase, 2W + G
Source Conguration:
Model:
STV25K-24S
Nominal Voltage (50/60 Hz):
240 V ac
System Conguration:
Single-phase, 2W + G
Source Conguration:
STV25K Series Instruction Manual • 8
2.0 Specications
Table 2: Technical Specications
Parameters Model
STV25K-10S STV25K-24S
Nominal Input Voltage 120 V ac 240 V ac
System Conguration Single-phase, 2W + G Single-phase, 2W + G
Maximum Continuous Operating
Voltage (MCOV) 150 V ac 275 V ac
Operating Frequency Range 47–63 Hz
Input Current Rating 20 A
Short Circuit Current Rating
(SCCR)
5 kAIC when protected by a listed Class G
fuse rated at 25 A, 480 V ac minimum
Surge Current Rating 25 kA per phase
Nominal Discharge Current (IN)3 kA
Response Time <0.5 ns
Modes of Protection All Modes: L–N, L–L, L–G, N–G
EMI/RFI Noise Rejection Normal mode: 50 dB minimum
Common mode: 40 dB minimum
Operating Temperature -40°C to +60°C (-40°F to +140°F)
Operating Humidity 0 to 95% non-condensing
Dimensions, D x W x H 4.35 in. x 2.56 in. x 4.84 in.
(110.5 mm x 65.0 mm x 122.9 mm)
Net Weight 3.0 lb. (1.36 kg)
Enclosure Metal, IP20
Mounting Type DIN rail mounting
NOTE: Optional chassis mounting bracket is available, P/N SDN-PMBRK2
Connections Screw terminals, #12 AWG
Status Indication Green LED, Form C relay contacts
Safety Approvals UL 1449 3rd edition
Warranty 10 year limited warranty
UL 1449 3rd Edition Type 4 Voltage Protection Ratings (VPRs)
Line to Neutral 500 V N/A
Line to Line N/A 900 V
Line to Ground 500 V 900 V
Neutral to Ground 500 V N/A
STV25K Series Instruction Manual • 9
3.0 Registration & Warranty
3.1 Product Registration
To register your product for updates and information on service and support, visit
our Web site at: http://www.solahd.com/support/registration.htm.
3.2 Warranty Information
Please see the “Terms & Conditions of Sale”.
NOTES
P/N: 82166 Rev 1
May 2011
www.solahd.com
(800) 377- 4384 • (847) 268-6651
solahd.technicalservices@emerson.com
