Installation, Operation and Maintenance Manual IO-70105 Rev 1, 1/2014
Surge Protective Devices
Model 310
Installation & O
p
eration Manual
Model
3
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Installation, Operation and Maintenance Manual IO-80102 Rev 3, 10-16
ASCO SURGE PROTECTIVE DEVICE
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
The ASCO Model 310 surge protective device is a high quality, high energy surge current diversion system
designed to protect sensitive equipment from damaging transient voltage surges resulting from load
switching, lightning strikes and other sources. The Model 310 is a modular product designed to be easily
installed in existing AC panelboards and control panels using standard DIN-rail mounting brackets.
The installer should perform the following steps to assure a quality installation. Please read all instructions
before starting the installation of this product. These instructions do not replace national or local
electrical codes.
INSTALLATION
DANGER! ONLY QUALIFIED PERSONNEL SHOULD INSTALL OR
SERVICE THIS SYSTEM. ELECTRICAL SAFETY PRE-CAUTIONS 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.
DANGER! SEULEMENT LE PERSONNEL QUALIFIÉ DOIT INSTALLER OU MAINTENIR CE SYSTÈME. DES
PRÉCAUTIONS DE SÉCURITÉ EN ÉLECTRICITÉ DOIVENT ÊTRE SUIVIS LORS DE L'INSTALLATION OU DE
LA MAINTENANCE DE CET EQUIPEMENT. POUR EVITER TOUT RISQUE DE CHOC ÉLECTRIQUE,
DÉBRANCHEZ ET VEROUILLER TOUTES LES SOURCES D’ ALIMENTATION DE CET EQUIPEMENT AVANT
DE LE BRANCHER OU LE MAINTENIR.
Proper installation is required for maximum system performance. Read the following information to
assure a quality installation.
Environment — For use indoors, in an ambient temperature of -40°C to +85°C, with a relative humidity of
0% to 95% (non-condensing).
Mounting — Unit mounts to standard 35mm symmetrical Din rail (EN50022/DIN46277-3).
Connections — Unit should be connected in parallel with the power source (see Diagram 1 on page 3).
The length of wire is critical to the performance of this device; therefore the connection wires should be
as short as possible. If installation cannot accommodate short wires the Kelvin method of wiring should
be used to improve performance of the SPD (see Diagram 2 on page 3).
Wire Sizing/Routing — Wire connection terminals accept wire with the cross sectional area of 6 -
35mm2. To reduce the wire impedance to surge currents all conducts should be twisted together and
routed in the same conduit raceway. All sharp bends in conductors should be avoided.
Over Current Protection — External over-current protection is required. A 50A rated fuse or a 32A circuit
breaker is to precede the incoming terminals of the SPD.
Remote Status Connections — Unit is provided with remote status contacts located on the base of the
device. The contacts may be wired using either the normally open “NO” or normally closed positions
depending whether there is a need to monitor if the unit is in ok or failed status. After all modules are
installed and operating normally the contacts are open. If modules are removed or failed the contacts are
closed (see Diagram 3 on page 3).
OPERATION
CAUTION – For proper and safe operation, neutral and ground
MUST be reliably connected. Failure to operate this unit from a
solidly grounded power source of the proper configuration will
reduce or impede operation, and may result in unit failure.
ATTENTION - Pour un fonctionnement correct et sûr, le neutre et la mise à la terre doit être
connectés de manière fiable. Défaut de faire fonctionner cet appareil à partir d'une source
d'alimentation solidement mise à la terre va réduire ou même empêcher le fonctionnement correct
et peut entraîner une défaillance de l'unité.
This product is designed for years of trouble-free operation and requires little or no operator intervention
after installation. If a green indicator appears in the window of the module, the device is operating
normally. If the red indicator appears, the module has reduced protection and must be replaced. Prior to
replacing module assure the voltage supplied to the unit is correct and that the modules are not loose in
the base causing a false failure. Replacement modules are available for this device; see MODEL NUMBER
CONFIGURATION on next page.
TROUBLESHOOTING
If any diagnostic indicators indicate a problem, check all connections and voltages to the unit. If all connections are
reliable, and proper voltages are supplied to the unit, call ASCO Surge Protection Inc at 607-721-8840.
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Installation, Operation and Maintenance Manual IO-80102 Rev 3, 10-16
2
MODEL NUMBER CONFIGURATION
(1-3) Model
310 = Modular, MOV Technology
(4-7) Configuration & Voltage
See Chart on Next Page
(8-10) Surge Rating
P04 = 40kA Mode/40kA Phase
P08 = 40kA Mode/80kA Phase
(11) Modes of Protection
A = All Modes of Protection
T = Add N-G Gas Tube Protection
(12) Connection Type
1 = Single Module, 2 terminals
2 = Two Modules, 3 terminals
3 = Three Modules, 4 terminals
4 = Four Modules, 5 terminals
(13) Monitoring Options
F = Mechanical Visual Flag
(14) Enclosure
N = No Enclosure
(15) UL 1449 Type
N = No UL 1449 approvals
(16) Accessories
0 = Standard
X = SPD with additional
Options/Accessories
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Model #: _ _ _
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Confi
g
uration & Volta
g
e Chart
Installation, Operation and Maintenance Manual IO-80102 Rev 3, 10-16
Surge Protection
14550 58th Street North
Clearwater, Florida 33760
P (800) 237-4567
P (727) 535-6339
F (727) 539-8955
While every precaution has been taken to ensure accuracy and
completeness in this literature, ASCO assumes no responsibility, and
disclaims all liability for damages resulting from use of this information
or for any errors or omissions.
IO-80102 (Rev 3 10-16) Printed in USA
DIAGRAM 1 — Standard Connection DIAGRAM 2 — Kelvin Connection
DIAGRAM 3 — Remote Output
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