Three-Pole Load Break Switches

ABS Load Break Switches and Isolators for voltages ranging from 3.3KV to 36 KV offers a high  technical standard and  economy over  the  years  for  the  switchgear  manufacturer  with dependability,  reliability and versatility.

MAIN  FEATURES

  • High  operating  reliability
  • Simple  maintenance and  inspection
  • High  dynamic and thermal  strength
  • Tested in CPRI  as per  IS-9920.
  • Special tubular  arc-chutes.
  • Current interruption  without visible
  • Simple  driving  mechanism

 

The salient feature  of ABS  Load  Break Switch is  its  ability  to permit  load  connections even  under a short  circuit  condition without danger to the operating personnel.  It complies with IEC. VOE and IS standards.

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Description

ABS Load Break Switches and Isolators for voltages ranging from 3.3KV to 36 KV offers a high  technical standard and  economy over  the  years  for  the  switchgear  manufacturer  with dependability,  reliability and versatility.

MAIN  FEATURES

  • High  operating  reliability
  • Simple  maintenance and  inspection
  • High  dynamic and thermal  strength
  • Tested in CPRI  as per  IS-9920.
  • Special tubular  arc-chutes.
  • Current interruption  without visible
  • Simple  driving  mechanism

 

The salient feature  of ABS  Load  Break Switch is  its  ability  to permit  load  connections even  under a short  circuit  condition without danger to the operating personnel.  It complies with IEC. VOE and IS standards.

Main Features

• high operating reliability
• Simple maintenance and inspection
• high dynamic and thermal strength
• tested in CPRI as per IS-9920.
• special tubular arc-chutes.
• current interruption without visible arcs.
•simple driving mechanism

The salient feature of ABS Load Break Switch is its ability to permit load connections even under a short circuit condition without danger to the operating personnel. It complies with IEC. VOE and IS standards.

A high speed (snap action) make and break ensures. a fast switching action and the very special design of arc chutes having excellent extinguishing properties for both high and low currents, suitability of mounting in horizontal or vertical plane etc. prove the versatility of these switches.

Due to the compact design of individual cubicles, and the feasibility of mounting the switches in different directions, economy in space is achieved, with ample scope for future extension.

The triple pole Load Break Switch can be used for switching of Transformer feeders, overhead lines. Capacitor Banks, Cable feeders and Ring Mains.

For Protection against short circuits H.T. Fuses can be offered with the switch.

Accessories

1. FUSE PROVISION

• Fuse mounting arrangement for providing Din type or TAG type H.T. HRC fuses for short circuit protection is offered as a factory fitted accessory.

• Din type or Tag type H.T.HRC fuses of reputed make suitable for Transformer/Distribution applications can be supplied along with the Load Break Switch as OPTIONAL items. Details of rating etc depend upon application and make and necessary support to the customer in selecting the range of H.T.HRC fuses can be extended.

2. SHUNT TRIP COIL

Shunt trip coil release being offered for spring charged version Load Break Switches, are meant for remote tripping mainly and can be offered for different aux. voltages (indicated below) and the coils are of short time rated.
110V A.C 50 Hz
220V A.C 50 Hz
110V D.C
220V D.C
* Other voltages on request

3. AUXILIARY CONTACTS

This can be fitted on to the switch or isolator with a combination of 2n/O + 2n/c or 3n/O +3n/c + 1 wiping contact.

4. EARTH SWITCH

• This can be supplied as a factory assembled accessory with or without interlock with the main drive mechanism. The earthing switch _can be mounted either on incoming or outgoing side or at the bottom of the fuse base.

• Independent Earth switches with higher capacity are also available in the range for use in CIRCUIT BREAKER cubicles.

• The earth switch is also tested at CPRI for short-circuit withstand and peak making.

Technical Data

TECHNICAL  DATA TKL 3 12/630 TKL 3 12/1250 TKL 3 24/630
Rated  Voltage 12 KV 12  KV 24 KV
Rated  Frequency 50  Hz 50 Hz 50  Hz
Rated  Current 630  A 1250 A 630 A
Rated  Peak Current 80 KA 62.5 KA 80 KA
Rated  Short time current/ 1    Sec. 31.5 KA 26.2  KA (3 Sec) 26 KA
Rated  Making Current 80 KA 62.5 KA 36 KA
Rated  Breaking  Current

Impulse  Voltage, Wave  Shape  1.2/50 MS

630  A 630 A 630  A
{i)       To  Earth 75 KV 75 KV 125 KV
{ii)      Between  Poles 75 KV 75 KV 125 KV
{iii)     Between  Open  Contacts 85 KV 85 KV 145 KV
Power Frequency Test Voltage
{ i)       To  Earth 35 KV 35 KV 55 KV
{ii)      Between  Poles 35 KV 35 KV 55 KV
{ii)      Between  Open  Contacts 45 KV 45 KV 75 KV
Breaking   of Capacitance  Load 50  A 50  A 25 A
Closed  Loop breaking current COS <I>  = 0.31 ND 630  A 630  A 630  A
Rated Transformer Off  Load  Breaking capacity 120 A 120 A 120 A
Rated  Line  Charging  Breaking  Capacity 90  A 90  A 90 A
Rated  Cable  Charging  Breaking Capacity

Dimensions  {Ref.  Drg.  Enclosed)

90  A 90  A 90 A
{ j)       Between Poles {Centres)        mm 150-210 150-210 175-250
{ii)      Between Open Contacts         mm 140 140 235
{iii)     Between  live parts and  earth  mm 130 130 210
Making  Time           35 M. Sec.
Arc  Duration          5-20 M.Sec.

SELECTION TABLE

DESCRIPTION TYPE  REFERENCE
TKL 3 Load  Break Switches in  11  KV 400/630 A can  be ottered with  pole distances of- 150mm  or 210 mm in the following  configuration. D

D – SA-AA D – UH

D – UH -SA

1  .                Basic  ON/OFF  Switch  {Quick  make,  Quick Break)

2.        Switch with  mechanical tripping  and shunt trip assembly

3.        Switch with  fuse base

4.        Switch with fuse  base and mechanical  tripping feature

Note:

Any accessory,  if required,  should  be specified  in addition to the above type reference.