Eaton SP2 Installation & Operation - page 2
For more information visit: www.Eaton.com
Page 3
Page 2
For more information visit: www.Eaton.com
2.0 Installation
Refer to Section 1.2 and look at the label on the SPD
to verify that the SPD’s voltage rating and wiring
configuration matches that of the electrical system.
Use an AC voltmeter to measure the system’s line
voltage to ensure that the correct model of SPD is
being installed. Damage to the SPD may result if it
is connected to an electrical system of a higher
voltage or different wiring configuration.
2.1 Mounting
The SPD is to be mounted directly to the electrical
panel.
IMPORTANT!
• Choose a mounting location for the SPD that
provides the shortest and straightest possible
wiring (but not less than six inches lead
length) from the SPD to the electrical system
connections. Excessive lead length and sharp
bends will degrade SPD performance.
• If the electrical system uses an isolated
ground, the SPD must be isolated from
ground using insulated conduit fittings.
• When using conduit, avoid using 90° elbows
and keep the conduit run as short and straight
as possible.
Mount the SPD directly to the electrical panel using
a
3
⁄
4
” locknut as shown in Figure 2-1.
To maintain the enclosure’s NEMA 4X rating, install
an appropriate gasket (not included) between the
SPD and the Enclosure’s wall.
Figure 2-1. Panel Installation
2.1.1 Conduit Installation
When mounting the SPD outdoors, use
weatherproof conduit and fittings to maintain the
enclosure’s NEMA 4X rating. See Figure 2-2.
Figure 2-2. Conduit Installation
2.2 Wiring
IMPORTANT!
• Be sure to follow all national, state, and local
electrical codes when making wiring
connections.
• When connecting the wires from the SPD to
the electrical system, cut the wires as
necessary to keep them as short as possible,
but not less than six inches.
• To maximize the SPD’s performance, twist
and bind the wires together to reduce the
impedance of the wire (one twist/inch).
• If the system utilizes an isolated ground, the
SPD’s ground wire must be connected to the
system’s isolated ground bus.
1. Locate the electrical system’s applicable
wiring diagram in Section 2.3. Reference this
wiring diagram as necessary in Steps 2, 3,
and 4.
2. Connect the SPD’s ground wire (green) to the
system’s ground connection. Delta and Wye
only.
3. Connect the SPD’s neutral wire (white) to the
system’s neutral connection (not required for
3-phase Delta and Wye systems).
4. Connect the SPD’s phase A, B, and C wires
(black) to the system’s corresponding phase
A, B, and C connections according to
applicable national, state, and local electrical
codes.
2.3 SPD Wiring Diagrams
3.0 Operation
3.1 Power Up and System Checkout
Apply system power. The Green LED should light. If
the connected LED does not light, remove power,
check connections, and test again. If the LED still
does not light, contact your supplier.
3.2 Routine Operation
After system power has been applied, the SPD
automatically begins to protect down-stream
electrical devices from damaging voltage transients.
With all phase voltages present, the LED indicator
reports the status of the protection elements and is
active when all of them are intact and providing
protection. Any loss of protection is signaled when
the LED turns from Green to Red.
The device is not repairable and contains no user
serviceable parts. If the unit fails, as evidenced by
the LED turning Red, the unit must be replaced.
Please contact your distributor as the SPD may be
under warranty.
DO NOT use the Suppression Circuit Status LEDs as
an indication of the presence or absence of system
phase voltages.
Avoid sharp bends
in conduit and longer
than necessary wire
lengths.
Keep conduit length
as short and
straight as possible.
Tighten locknut to
20.3 Lb-In (2.3N•m)
For NEMA 4X installation, install appropriate
customer supplied gasket between
SPD and enclosure wall.
PHASE A
NEUTRAL
SPD
N
eu
tra
l (
W
H
T)
Ph
as
e
A
(B
LK
)
Grounding and
bonding per
national and local
electrical codes
Single-Phase
(120, 240)
PHASE A
PHASE B
NEUTRAL
SPD
N
e
u
tr
a
l (
W
H
T
)
P
h
a
se
B
(
B
L
K
)
P
h
a
se
A
(
B
L
K
)
Grounding and
bonding per
national and local
electrical codes
Split Phase
(240S)
SPD
PHASE A
GROUND
PHASE B
PHASE C
Ph
as
e
C
(B
LK
)
Ph
as
e
B
(B
LK
)
Ph
as
e
A
(B
LK
)
G
ro
un
d
(G
R
N
)
3-Phase Delta
(240D, 480D)
SPD
PHASE A
NEUTRAL
PHASE B
PHASE C
Ph
as
e
C
(B
LK
)
Ph
as
e
B
(B
LK
)
Ph
as
e
A
(B
LK
)
G
ro
un
d
(G
R
N
)
Grounding and
bonding per
national and local
electrical codes
3-Phase Wye
+ Ground
(208Y, 480Y, 600Y)