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OV RH T3 SE RIES A ND OV RHS 3U SER IES S U R G E P R OT E C T I V E D E V I C E S
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Important safety instructions
Installation
For the OVRHS3U series units refer to Table 1 to see if an upstream
overcurrent protection device is required. All OVRHT3 series units
are Type 1 and do not require upstream overcurrent protection for
safe operation; however, the design may require or the installer may
choose to connect the OVRHT3 series to a circuit breaker, molded
case switch or fused disconnect. If a breaker or molded case switch
is used for connecting the phase conductors, a 30 amp rating is
recommended. The unit must be installed in parallel to the electrical
distribution system. Careful consideration should be made in
selecting the knockout location because excess lead length and
sharp bends in the wire drastically decrease the effectiveness of the
SPD. The SPD may also be mounted by it's metal bracket within the
equipment enclosure.
1. Disconnect all power supplying the electrical panel.
2. Remove the panel screws and cover. Retain these parts for
re-installation.
3. Either remove a knockout 13mm (0.5 inches) or install provided
metal bracket.
4. Remove lock washer from the SPDs threaded nipple. Carefully
feed the wires through the knockout to avoid cutting wire
insulation. Slide lock washer over the wires to anchor the
threaded nipple. Rotate the SPD so that the function status LED
indicators can be easily viewed. Tighten the lock washer to secure
the SPD.
5. If this to be a NEMA 4X enclosure, then all conduits and fitting
must be rated and properly installed such that the final
installation maintains the NEMA 4X rating.
6. Locate the neutral bar inside the electrical panel. Connect the
white or blue wire to the neutral bar and tighten to torque
specified on inside of panel. Keep conductor length as short as
possible and avoid sharp bends in the wire.
Model OVRHT3B(C)502301PI is suitable for use on TN-C and TN-C-S power systems (see EN60950).
Model OVRHT3B(C)502301PJ is intended for TNS power systems, but it may be used on TN-C-S and U.S. 120/240V (without neutral) services as well.
Model OVRHT3B(C)502301PK is intended for IT systems, but with caution may be used on the above other power systems as well.
Model OVRHT3B(C)502301PL is intended for TT systems, but it may be used on TNS, TN-C-S, and U.S. (without neutral) services.
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Table 1: Upstream overcurrent protective device requirements
Model number
SPD type
OVRHS3U series
OVRHS3U401201P
1, 2
OVRHS3U402401P
2
OVRHS3U401202S
1, 2
OVRHS3U802402SR
2
OVRHS3U402403D
1, 2
OVRHS3U404803D
2
OVRHS3U401202S
2
OVRHS3U402083Y
1, 2
OVRHS3U402773Y
2
OVRHS3U402303Y
2
OVRHT3B(C) series
OVRHT3B(C)50XXXXX
1
OVRHT3B(C)502301P (I,J,K,L)
1
All units are furnished with 36" leads.
7. Locate the ground bar inside the electrical panel. Connect the
green/yellow wire to the ground bar and tighten the terminal to
the torque specified on the panel. Keep conductor length as short
as possible and avoid sharp bends. If neutral is bonded to ground,
green wire may be terminated to neutral.
8. Black or brown wires (model dependent) should be connected
to either the breaker or the bus of the panel, as long as the short
circuit current rating does not exceed 65, 100, or 200 kAIC (please
see Table 1 for kAIC rating). On High-Leg Delta units connect
the orange wire to phase B (the high-leg). If you would like to
be able to turn the unit off, then you may consider connecting it
to a breaker (# of breaker pole positions determined by the # of
black or brown wires provided with the unit). Tighten terminals to
torque specified on inside of panel. Keep lead lengths as short as
possible and avoid sharp bends.
9. Re-install panel cover.
Operation
1. Apply power to the panel. If the phase, neutral and grounding
wirings are done correctly, the green function status LEDs will
illuminate. If the LEDs do not turn on, remove the power and
review all of the previous installation procedures.
2. If the LED light (s) is extinguished, reset the breaker if the SPD
is tied to a breaker. If the LED light(s) come(s) back on then the
protector is fine. If the LEDs are still out, or you can not reset the
breaker, the protector must be replaced. This unit contains no
user serviceable parts.
kAIC rating
Upstream breaker
100
Not required
100
30A
100
Not required
100
30A
100
Not required
65
20A
65
20A
100
Not required
65
20A
65
20A
100
Not required
200
Not required
Wire gauge
14 AWG
14 AWG
14 AWG
14 AWG
14 AWG
14 AWG
14 AWG
14 AWG
14 AWG
14 AWG
12 AWG
12 AWG
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