Series Cutout (SCO)
Installation
© ADB Airfield Solutions All Rights Reserved
10
96A0294 Rev. G
2.4 Installation
2.4.1 Introduction
This section provides installation instructions for the SCO cutout. It includes equipment unpacking, individual cutout installation,
cutout wiring, and pre-installed cutout installation. Wiring instructions for pre-installed cutouts are provided in
Pre-Installed
Cutout Installation
in this section.
A cutout can be installed individually on or close to a constant current regulator (CCR). It can also be incorporated inside other
equipment. Examples would be in a bay on a SwitchGear regulator system or internal to a ADB Airfield Solutions Signature
Series
TM
CCR. It can also be incorporated inside other equipment.
2.4.2 Unpacking
The equipment is shipped ready for installation. Handle equipment very carefully to prevent component damage. Unpack the
carton upon receipt and check the contents and their condition. Note any exterior damage to the carton that might lead to
detection of equipment damage.
If you note any damage to any equipment, file a claim with the carrier immediately.
The carrier may need to inspect the equipment.
The carton contains the following:
2.4.3 Individual Cutout Installation
This subsection provides information about installing individual SCO cutouts. It includes individual cutout mounting and wiring. It
also includes pre-installed cutout installation.
2.4.3.1 Individual Cutout Mounting
The series cutout can be installed in the vault substation, in the vicinity of the CCR to which it is connected. For example,
the cutout can be mounted in the following ways:
•
On the wall or rack (Unistrut
or similar type of channel) beside the CCR
•
In a “Field Junction Box” containing a large number of cutouts
•
In a separate enclosure beside the CCR
In case L-847 circuit selectors are used, the cutouts may be used on either side (input or output) of the selectors, but preferably
on the output side (one cutout for each series circuit). Some installations use a cutout on both the input and outputs of the L-
847.
Before mounting the SCO cutout, determine if the interlock switch will be used. See Figure 11 for application information for
interlocking with the CCR. If the interlock is used, determine how the wiring for the CCR remote control terminal block will be
routed. The wire can be routed through the mounting plate or through the body of the SCO cutout. Guidance for routing
through the mounting plate is shown in Figure 5. Figure 6 provides guidance for routing through the SCO body.
NOTE:
If the interlock switch is wired from behind the panel (in line with the interlock switch), then drill a hole as shown in figure
5. Be sure to de-bur the hole and place a spiral wrap around the wire leads.
WARNING
Allow only qualified personnel to perform the following tasks. Observe and follow the safety instructions in this
document and all other related documentation.
•
SCO cutout
•
Two keys
•
Handle Position decal
•
Read Manual decal
•
Instruction Manual
WARNING
• When using the SCO cutout with a circuit selector, the regulator must be turned off and locked out before
performing any insulation resistance measurements. To operate the regulator without erratic results, all SCO cutouts
must be returned to the normal operating position.
• To test the regulator under short circuit conditions, all SCO cutouts after the circuit selector must be in the test &
measurement position.
