ABB OVRHS3U Series Installation, Operation And Maintenance Manual - Page 2

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ABB OVRHS3U Series Installation, Operation And Maintenance Manual

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

OVRHS3U401202S

1, 2

OVRHS3U802402SR

OVRHS3U402403D

1, 2

OVRHS3U404803D

OVRHS3U401202S

OVRHS3U402083Y

1, 2

OVRHS3U402773Y

OVRHS3U402303Y

OVRHT3B(C) series

OVRHT3B(C)50XXXXX

OVRHT3B(C)502301P (I,J,K,L)

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

20A

100

Not required

20A

100

Not required

200

Not required

Wire gauge

14 AWG

12 AWG