Electrical connections
CAUTION:
Prior to installation ensure the system configuration and
voltage is equivalent to the OVRHSP(SR) series unit being
installed.
OVRHSP(SR) units come with 254 mm (36 in.) of #10 AWG
conductors. Each phase conductor is labeled (Phase A, B or C).
Ensure that the conductor lengths are kept as short and straight
as possible. On all High-Leg systems, the High-Leg (208V LN)
must be connected to the Phase B of the SPD. (Color coded
orange according to NEC).
*The 3-wire Delta + ground OVRHSP(SR) series units do not
have a neutral conductor.
Connecting Form “C”
dry contacts
Units that come with Form “C” dry relay contacts provide
status of the surge protective device. These contacts are for
connection to a user-provided remote alarm and monitoring
circuit. The relay contacts are rated 65VDC/150VAC with
maximum switching power of 30WDC/60VA AC. The Form “C”
contacts come pre-wired with 254 mm (36 in.) of #20 AWG
conductors on the OVRHSP 60 to 100kA models and on all
OVRHSR models.
When input power is present on all phases, terminals “NO”
(Normally Open) and “COM” (Common) are an open circuit
and terminals “NC” (Normally Closed) and “COM” are a
closed circuit. The contacts change state when the unit has
encountered failure to one or more phases.
The installer must provide the appropriate raceway and wiring
for the monitoring circuit, observing the restrictions and conduit
openings illustrated in an earlier section of this manual.
Figure 6B
Enclosure mounting dimensions
(OVRHSR)
The OVRHSR design allows for it to be recessed
into the wall.
Dimensional specifications
Dim
Millimeters (Inches)
H1
254.0 (10.00)
H2
273.1 (10.75)
H3
292.1 (11.50)
W1
203.2 (8.00)
W2
152.4 (6.00)
D1
106.9 (4.20)
D2
50.8 (2.00)
Weight
9 (20)
All measurements in millimeters (inches) and kg (pounds)
(D1)
(D2)
(W1)
(W2)
Ø 7.87 (0.31)
19.05
(3/4)
Myers Hub
(H1)
(H2)
(H3)
Stud
Drywall
Flush-mount
plate
OVRHSR unit
OVRHSP/OVRHSR surge protective device
| Product manual 9
