Sola HD STV100K Series, Instruction Manual, Page: 6 / 12

STV100K Series Instruction Manual • 6
1.8 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 configurations.
1. Connect the black phase wires to the corre-
sponding phase on the service panel. For delta
high leg units, ensure the high leg is connected to
Phase B of the SPD.
2. Connect the white neutral wire of the SPD (if
provided) to the neutral of the supply. Connect the
green ground wire of the SPD to source ground.
3. If you are not using the relay contacts for remote
sensing, cut and dress the orange COM wire, the
blue NC wire, and the yellow NO wire in the conduit.
For remote sensing, wires are connected to COM,
NC, and NO respectively. (125 V ac, 5 A max.)
!
DANGER! 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.
NOTES:
• Figure 2 is a three-phase wye. A three-phase delta will have no neutral
wire. For a three-phase delta high leg, Phase B will be the high leg. A split
phase unit will have no Phase C and can be labeled Line 1 and Line 2.
• A single-phase L-N unit will have one black phase wire, a white neutral
wire, and a green ground wire. A single-phase L-L unit will have two black
phase wires and the green ground wire.
• Summary alarm Form C (1 NO and 1 NC) relay contacts may be provided
for remote indication of an SPD failure. This indication may also consist of
a phase loss or undervoltage condition.
• Summary alarm Form C relay contacts are rated 5 A at 250 V ac maximum
with a power factor of 1.0. For units with Summary Alarm Contacts, access
to the contacts are provided via #18 AWG wires (yellow NO, orange COM,
and blue NC).
1.9 Applying Power
Apply power to the SPD and ensure status indications are normal. Under normal
conditions, the green LEDs are illuminated and the red “Service” LED is extin-
guished. If normal status indication does not exist, see “2.0 Troubleshooting”.
Figure 2: Wiring connections