S&C Mark V Assembly And Installation Instructions Manual

S&C Circuit-Switchers
-
Mark V
Integer Style
Outdoor Transmission
34.5
kv through
69
kv
I
INSTRUCTIONS
For Field Assembly and Installation
[TABLE OF CONTENTS
I
Section Page Number
Section
Page Number
INTRODUCTION
........................................
1 INSTALLATION
.........................................
7
BEFORE STARTING INSTALLATION
......................
. 5 FINA1,CHECKS
........................................
10
1
INTRODUCTION
I
1
0
The equipment covered by this publication must be
selected for a specific application and it must be
installed, operated, and maintained by qualified
persons who are thoroughly trained and who
understand any hazards that may be involved. This
publication is written only for such qualified persons
and is not intended to be a substitute for adequate
training and experience in safety procedures for this
type of equipment.
General
The following instructions are for field assembly (erec-
tion) and installation of S&C Mark V Integer Style
Circuit-Switchers. See Figure 1.
The S&C Mark V Circuit-Switcher employs an in-series
circuit-breaking interrupter and a circuit-making and
isolating disconnect, making it especially suited for
switching and protection of transformers, lines, cables,
capacitor banks, and line-connected or tertiary-
connected shunt reactors. The Mark V Circuit-Switcher
is suitable for frequent operation over a long period
of time with minimal maintenance; is capable of closing,
carrying, and interrupting fault currents as well as load
currents; and utilizes interrupters economically
tailored for specific applications by employing the
precise number of interrupting gaps required. These
interrupters are unaffected if subjected to sustained
system voltage for extended periods, as a result of being
left open with the disconnect blades closed for any
reason.
Each pole-unit of the S&C Mark V Circuit-Switcher
includes a brain which provides built-in positive
sequence control
. . .
and a fully enclosed stored-energy
source dedicated solely to operation of the interrupter
which is in the circuit at all times. Close-and-trip
mechanisms are fully enclosed and protected, too.
There are no external linkages, lever arms, cams, shunts,
etc. that must be coordinated with a disconnect blade
to accomplish circuit interruption. Positively sequenced
operation is assured regardless of severe weather
conditions such as high winds, rain, sleet, or snow.
The fault-closing contacts utilized on Integer Style
Mark V Circuit-Switchers consist of a rugged stainless-
steel tongue contact and a reverse-loop jaw contact
of tinned, tempered silicon bronze. This contact
arrangement assures long operating life and contrib-
utes to Integer Style Mark V Circuit-Switcher's high
fault-closing capability. Dissimilar metals prevent
contact welding.
The current-carrying contacts utilized on Integer
Style Mark V Circuit-Switchers consist of a multifinger,
spring-loaded, silver-inlaid, tinned hard-drawn copper,
reverse-loop jaw contact that grips hard (but only when
needed during short-circuit current surges) against a
silver-inlaid, high-conductivity cast copper tongue
contact. Confining all arcing to the fault-closing
contacts, plus the built-in blade-wiping action, assures
clean current-carrying contacts, low-resistance current
path.
Mark V Circuit-Switcher features a base-integrated
power train with drive-shaft mechanism that efficiently
transmits and controls energy at high operating
speed
. . .
and permanently maintains close interphase
simultaneity. The drive train utilizes 186-degree
vertical-shaft rotation to provide full toggle action at
both ends of closing and opening strokes for smooth,
shock-free acceleration and deceleration. Peak mechan-
ical advantage is developed at stroke ends for power
opening and closing without hesitation under %-inch
ice Sormation, as discussed on page 2 under "Power
Operation."
Supersedes lnstructlon Sheet 711-500 dated 3-17-86 '1991
INSTRUCTION SHEET
7 1 1 -500
S&C ELECTRIC COMPANY Chicago Page 1 of 12
S&C ELECTRIC CANADA D. Toronto December 16,1991