Dairyland SSD Series Kurulum Talimatları - Sayfa 2

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INSTALLATION INSTRUCTIONS

These general instructions apply to all applications.

WARNING:

During installation, the voltage on the structure may rise

to an unsafe level (i.e., due to induced AC, AC fault or

lightning on the structure). Sparking and current flow may

occur when connecting or disconnecting decouplers or

over-voltage protectors. Assure that this does not occur

in hazardous locations where gases or vapors may be

present. All necessary safety precautions must be taken

by the user to avoid unsafe worker conditions, including

arcing, in accordance with applicable industry and/or

company-required practices. Dairyland provides suggested

procedures for installing and operating this equipment

(See the section on Worker Safety). But the user must be

responsible for and approve the procedures to be used by its

workers when installing the equipment because Dairyland

cannot be familiar with each user's safety guidelines.

CAUTION:

Note: Explosion Hazard - Substitution of any component

may impair suitability for Class I, Division 2.

Worker Safety

For worker safety during installation, it is recommended that

the user obtain certain equipment; namely a pair of electrically

insulated gloves, a shorting cable approximately 3 ft (0.91 m)

long with insulated clamps on each end, and a multi-meter

to measure AC voltage. (Of these items, Dairyland offers

a suitable 3 ft long 1/0AWG shorting cable with insulated

clamps, Model# BCL-1/0 for decouplers rated 10kA or higher

or Model# BCL-2 for decouplers rated less than 10kA.) The

following installation procedure assumes that these items are

available. It is suggested that a grounding jumper be used

as a safety precaution in the event the lead to the structure

rises to an unsafe potential when it is disconnected during

the installation process or if an electrical disturbance occurs

while the decoupler is being installed. Be sure to remove the

grounding jumper after the decoupler is completely installed.

If the structure voltage is not at a safe touch potential

(i.e.,>15VAC to ground per NACE SP0177), then insulating

gloves should be used.

Mounting

Mount the SSD so that the total length of conductor to the

connection points will be as short as possible if the SSD is going

to be used to provide over-voltage protection from lightning.

All conductors have inductance which will cause a significant

voltage per unit of conductor length when subject to lightning

surge current. To minimize the voltage developed between

the connection points, install the SSD as close as practical to

the required connection points and cut the conductor to the

shortest possible length during installation. For most insulated

Dairyland Electrical Industries • P.O. Box 187 Stoughton, WI 53589 • 608-877-9900 • www.dairyland.com • [email protected]

Document ID: 4557

joint applications the SSD can, and should, be installed with

less than 8" (200 mm) of conductor. Conductors can develop

1-3 kV/ft. (approx. 3-10 kV/meter) of length due to lightning;

hence, for this reason, leads should be kept as short as

possible in lightning applications. Conductor length is not

critical for limiting voltage due to 50 Hz or 60 Hz current.

Mounting Accessories

Numerous mounting accessories are available from Dairyland

to aid in the proper installation of the PCR. Full details and

complete installation instructions are available on the Dairyland

website here:

Dairyland Accessories.

Specific Installation Guidance

The Dairyland website contains detailed information on

the installation methods specific to a given application.

For wiring diagrams and/or application guidance, see

Dairyland Applications.

Environmental Exposure

The SSD enclosure is rated IP68 and is suitable for indoor

or outdoor use, in submersible and non-submersible

applications. SSDs may be submersed in non-freezing

conditions up to 6.5 ft. (2 m) depth for occasional prolonged

periods, though not continuously.

The unit must be installed in environments with ambient

temperatures of -49ºF to +149ºF (-45ºC to +65ºC).

Polarity

If the SSD purchased has asymmetrical blocking characteristics

and it is being connected between a cathodically protected

structure and ground, connect the negative terminal of the

SSD to the cathodically protected structure and the positive

terminal to ground. If being connected between two different

cathodically protected systems, attach the negative terminal

to the more negative structure and the positive terminal to the

less negative structure. A label on the SSD housing shows the

polarity of each terminal.

Enclosure

The standard enclosure is rated IP68 to 2 m depth (comparable

to NEMA 6P). This enclosure is suitable for submersible

applications.

Ambient Operating Temperature

-45ºC to +65ºC.

Field Testing

Before installation, the following measurements are suggested

to confirm that the steady-state conditions imposed on the

SSD will be within its ratings.

1. Measure the open-circuit DC voltage between the SSD

connection points with a multimeter. The open-circuit DC

voltage measured should be within the DC blocking voltage

rating of the model selected (i.e., normally -3.0 V/+1.0 V or

+/-2.0 V, unless a custom version has been ordered).

SSD Installation Instructions

Published Date: 2019.08.20