By-Pass Switches
TYPE:  EDC By-Pass
VOLTAGE:  15.5kV, 25.8kV and 38.0 kV.
CURRENT:  600 and 900 ampere continuous.
MOMENTARY:  40,000 amperes momentary
BIL:  110kV, 125 kV and 150 kV BIL.
PURPOSE:  Distribution class, single pole, single throw disconnects provide a durable switch for line sectionalizing or isolating equipment on distribution circuits.
BLADE DESIGN:  Truss type construction of formed copper bars has increased width at hinge for greater rigidity.
FORMED STEEL CHANNEL BASE:  Base and backstrap are rugged hot dipped galvanized steel and has a dead ending hole at each end.
MINIMUM CURRENT INTERCHANGES:  Uniform conductivity is assured through utilization of hard drawn copper bar in forming one piece stationary contacts and terminal pads.
CONTACTS:  High pressure line type both clip and hinge ends.
CONTACT SURFACES:  600 amps ratings are silver to copper , 900 amps are silver to silver.
TIN PLATED TERMINAL PADS:  Accommodate terminals for either aluminium or copper conductors.
POSITIVE BLADE LOCK AND PRYOUT:  Blade latch prevents switch opening under high momentary current.
INSULATORS:  Suitable, characteristics available upon request.
VERTICAL OR UNDERHUNG MOUNTING:  Easily adaptable to single or double crossarm construction.
900 BLADE STOP:  stop can be field removed for 180 degree blade travel.
SPECIAL APPLICATION:  Variations to meet specific customer requirements are available upon request.
OPTION TERMINALS:  Switches can be furnished with any terminal arrangement documented.
STAINLESS STEEL LOAD BREAK HOOKS:  For use with portable loadbreak tool.
BENEFITS:
  • Uniform strength and conductivity with no hidden defects.
  • Washers act as a bearing assuring easy blade opening even after long exposure to contaminated atmosphere.
  • Assures proper blade alignment during closing.
  • Prevent nuisance openings and opening under fault conditions.
  • Stop pin can be removed if 180 degree blade travel is required.
  • Accommodates either bronze or aluminium terminals.

FUSED DISCONNECT SWITCH
TYPE:  ECR By-Pass
VOLTAGE:  15.5kV, 25.8kV
CURRENT:  100 ampere or 200 ampere fuseholder rating, 600 ampere disconnect switch rating.
MOMENTARY:  61,000 ampere in closed and by-pass position.
BIL:  110kV, and 150 kV BIL.
CONTACTS:  Reduced area----high pressure-----Silver overlay to silver plated copper.
PURPOSE:  Fused By-pass combinations for substation mounting.
COMBINATION:
  1. A fuse cut out and a single pole disconnect switch mounted in tandem on a common base.
  2. A separately mounted single pole companion disconnect switch.
INSULATORS:  Suitable characteristics available upon request.
BASE:  Galvanized structural steel channel.
TERMINAL PADS:  ANSI standard four hole, tinned to accept copper or aluminium terminals.
OPERATION:  The 1200 A regulator by-pass switch is a two pull sequence operated switch. 1200 ampere switches are equipped with the arcrupter expulsion interrupting device, which has sufficient ampere interrupting capacity for interruption of the regular exciting current with no exposed arcing.
EXPANSION JOINTS:  on 1200 ampere switches to prevent misalignment due to expansion and contraction of heavy, rigid conductor, it is suggested that expansion joints be used.
SURGE PROTECTION:  Surge protectors are available and provide economical surge protection when mounted across the line terminals of the by-pass switches.
APPLICATION:  Applicable to all regulators that can be set on neutral for the switching operation.
BENEFITS:
  • Minimizes the possibility of operator error.
  • Single pull both by-passes and disconnects the regulator or reconnects them to the line.
  • Minimize the operating effort of these heavy duty switches.
  • Interrupts the regulator exciting current and prevents arcing, damage to the switch contacts when disconnecting the regulator.
  • Increase contact pressure and minimizes the possibility of contact damage when subjected to high fault current.
TYPE:  ECT By-Pass
VOLTAGE:  15.5kV, 25.8kV, 38.0 and 72.5 kV.
CURRENT:  600 ampere continuous
MOMENTARY:  40,000 ampere in closed and 30,000 ampere in by-pass position.
BIL:  95kV, 110kV, 200kVand 350 kV BIL.
JAW CONTACTS:  Reverse loop - high pressure--- silver plated copper.
PURPOSE:  current transformer by-pass
HINGE CONTACTS:  Reduced area - high pressure--- silver plated copper to silver plated high conductivity bronze.
INSULATORS:  Suitable characteristics is available upon request.
BASE:  Galvanized structural steel channel.
TERMINAL PADS:  ANSI standard two hole, tinned to accept copper or aluminium terminals.
APPLICATION:   For by-passing and disconnecting current transformers without load dropping and service interruption.
OPERATION:  one pull on the 600A pull ring puts it through its proper and automatic switching sequency of by passing the current transformer and disconnecting the transformer from service.


FEATURE:
  1. Sequenced, make before break operation, both 600 & 1200 ampere.
  2. Single pull operation of 600 ampere ratings
  3. 2 pull operation of 1200 ampere ratings
  4. Reverse loop contacts on 600 ampere ratings

BENEFITS:
  • Minimizes the possibility of operating error.
  • Single pull both by -passes and disconnects the current transformer or reconnects them to the line.
  • Minimize the operating effort of these heavy duty switches.
  • Interrupts the regulator exciting current and prevents arcing, damage to the switch contacts when disconnecting the regulator.
  • Increase contact pressure and minimizes the possibility of contact damage when subjected to high fault current.