Southern States 38 kV-170 kV CapSwitcher - Manual (Page 5)

Title: Southern States 38 kV–170 kV CapSwitcher ®
Vertical Interrupter Style Capacitor Switcher
Product Specification
Guide
Page 5 of 10 Publication No.: PSG-807-031109
3.04 Interrupter
The capacitor switcher shall use SF
6
single gap puffer interrupters. Each
interrupter shall be housed in an insulator that is ANSI 70 gray. Arc assist type
interrupters are not acceptable. Each interrupter shall be provided with an
overpressure relief device and shall be field refillable. Hermetically sealed
interrupters are not acceptable.
3.05 SF
6
Gas System
The capacitor switcher shall have a common gas system constructed of copper
tubing that allows all of the interrupters to be pressurized through one fill port
accessible from the mechanism housing/control cabinet.
The gas system shall include the insulators, a color-coded, temperature
compensated gas density gauge that is visible from the ground and has
low-pressure alarm and lockout contacts. The density switch must be at ground
potential. Battery powered gas density monitors are not acceptable.
The system shall be constructed such that the density gauge can be isolated
from the interrupters to allow the low-pressure alarm and lockout contact set
points to be verified. A means for refilling the system in the field without
disassembling the capacitor switcher must be provided. The capacitor switcher
shall have a leak rate of less than 0.5% per year.
3.06 Terminal Pads
Terminal pads shall be unplated aluminum with 4 hole NEMA drilling pattern for
use with purchaser furnished terminal connectors. The terminal pads shall be
reversible for mounting at the top, bottom, or either side of the interrupter.
3.07 Operating Mechanism
3.07.01 Spring Operating Mechanism
Each capacitor switcher shall be provided with a spring open-spring
close mechanism with a rated duty cycle of CO – 5 min – CO – 5 min –
CO. The spring shall be charged via an electric motor in 15 seconds or
less. Pneumatic, hydraulic, or combination pneumatic/hydraulic
mechanisms are not acceptable. Devices utilizing multiple mechanisms
are not acceptable.
3.07.02 Mechanism Housing and Control Components
An ANSI 70 gray painted steel mechanism housing shall be furnished
and shall be provided with the following accessories: