S&C Source-Transfer PMH Pad-Mounted Gear
With Micro-AT
®
Control
Outdoor Distribution (14.4 kv and 25 kv)
S&C ELECTRIC COMPANY
s
663-503
INSTRUCTION SHEET
Page 32 of 35
August 14, 1995
OPTIONAL FEATURES—Continued
Item
Suffix Added to
Pad-Mounted Gear
Catalog Number
Applicable to
Models
Switch-Terminal Adapters—for connection of two cables (through 750 kc mil) per terminal
1
Note: Space limitations prevent use of these adapters where surge arresters are to be installed
-M1
All models
Cable Guides, one at each terminal
12
In switch compartments. For conductor sizes
No. 2 through 1000 kc mil
-M2
In fuse compartments. For conductor sizes
No. 2 through 4/0
-M3
Polymer-Housed Metal-Oxide Surge Arresters,
3
base-mounted, at all switch terminals
(removed for shipment)
9 kv
-N6
f
10 kv
-N7
f
12 kv
-N8
15 kv
-N9
18 kv
-N10
l
Mounting Provisions for Base-Mounted Surge Arresters,
4
at all switch terminals
9 kv, 10 kv,
or 9/10 kv
-P1
f
12 kv
-P3
15 kv
-P4
18 kv
-P5
l
Mounting Provisions for Porcelain Cable Terminators for
single-conductor UD cable, at all switch terminals
Joslyn PSC for No. 6 through 2/0,
d
or G&W
PAT for No. 4 through 250 kc mil copper or
aluminum cable
-U2
G&W PAT for 3/0 through 750 kc mil copper or
500 kc mil aluminum cable
d
-U3
Overcurrent Lockout. Prevents an automatic source transfer that would close a switch into a fault. Includes
field adjustable lockout level and lockout-reset time delay, lockout-indicating lamp, manual-reset key,
facilities for external reset, and six current sensors (one per phase for each switch)
5678
-Y2
Remote Indication. Includes provisions for remote monitoring of presence or absence of source voltages,
manual or automatic operating mode, and status of “ready” indicator, “event” indicator, and overcurrent
lockout (if furnished)
9
-Y4
Test panel. Permits the use of an external, adjustable three-phase source to verify, through independent
measurement, the response of the control to loss-of-source, phase-unbalance, and overcurrent-lockout
(if furnished) conditions
0⁄
-Y5
Supervisory Control. Permits switch operation from a remote location
9
-Y6
Communications Card. Permits local uploading of “events” and settings from the Micro-AT control to a user-
furnished personal computer, as well as downloading of the user’s standard operating parameters
¤‹
-Y8
1
When optional feature “-M1” or “-M2” is specified, cable-termination
options (suffixes “-U2” and “-U3”) cannot be accommodated. In addition,
when optional features “-M1” and “-M2” are both specified, only one cable
guide is provided at each switch terminal.
2
These devices extend below the base of the unit. A cable pit or
optional base spacer that provides a 12-inch or greater increase in cable-
termination height is required.
3
Surge arresters are base-mounted only (without isolators).
4
These provisions accommodate Ohio Brass Type PDV (metal oxide),
McGraw-Edison Type AZL19C (metal oxide), General Electric Tranquell
®
(metal oxide), or McGraw-Edison Type ES (silicon carbide) distribution-
class surge arresters. Surge arresters must be base-mounted only (with-
out isolators).
5
The current sensors furnished cannot be used with the switch-termi-
nal adapter option (suffix “-M1”) for applications involving two source
conductors per phase. For such applications, refer to the nearest S&C
Sales Office.
6
For applications where pad-mounted gear load feeders are connected
to transformers with wye-grounded primary windings, refer to the nearest
S&C Sales Office.
7
S&C Closed-Gap Current Sensors, Catalog Number TA-1758, are
furnished. Each current sensor accommodates a single conductor up
to 2
¹⁄₂
inches in diameter.
8
Current sensors must not be installed on unshielded cables or on
cables where the insulation is exposed but ungrounded (for example,
where dielectric tape or heat-shrink tubing is used). These sensors are
intended for application at ground potential and may be damaged by the
voltage gradient between the cable insulation and ground.
9
Includes a terminal block for user’s connections.
0
If a three-phase test source is not available, limited testing may be
performed using an external, adjustable single-phase source.
⁄
In instances where a three-phase test source is to be used, an S&C
Voltage Limiter—Three-Phase Catalog Number TA-1741 must be fur-
nished for the test circuit.
¤
Requires an IBM PC AT or compatible computer using Intel’s 80386
microprocessor, or higher. The computer must have a minimum of
2MB of memory, one 3.5-inch 1.44-MB floppy disk drive, and a hard
disk drive with at least 2MB of free space. The computer must operate
under Microsoft Windows™, Version 3.1.
‹
Requires S&C Maintenance Cable Catalog Number TA-2320 or
TA-2321. See “ACCESSORIES” on page 33.
d
These devices extend below the base of the unit. A cable pit or
optional base spacer is required.
f
Not applicable to 25-kv models.
l
Not applicable to 14.4-kv models.
APPENDIX D — Continued
