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
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High operating reliability
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Simple maintenance and inspection
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High dynamic and thermal strength
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Tested in CPRI as per IS-9920.
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Special tubular arc-chutes.
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Current interruption without visible
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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
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TECHNICAL
D
AT
A
|
TKL
3 12
/
6
30
|
TKL
3 12
/
1
2
50
|
TKL
3 24
/
6
30
|
|
Rated Voltage
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12 KV
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12 KV
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24 KV
|
|
Rated Frequency
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50 Hz
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50 Hz
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50 Hz
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Rated Current
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630 A
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1250 A
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630 A
|
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Rated Peak Current
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80 KA
|
62.5 KA
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80 KA
|
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Rated Short time current/ 1 Sec.
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31.5 KA
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26.2 KA (3 Sec)
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26 KA
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|
Rated Making Current
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80 KA
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62.5 KA
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36 KA
|
|
Rated Breaking Current
Impulse Voltage, Wave Shape 1.2/50 MS
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630 A
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630 A
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630 A
|
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{i) To Earth
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75 KV
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75 KV
|
125 KV
|
|
{ii) Between Poles
|
75 KV
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75 KV
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125 KV
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{iii) Between Open Contacts
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85 KV
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85 KV
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145 KV
|
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Power Frequency Test Voltage
|
|
|
|
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{ i) To Earth
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35 KV
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35 KV
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55 KV
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{ii) Between Poles
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35 KV
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35 KV
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55 KV
|
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{ii) Between Open Contacts
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45 KV
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45 KV
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75 KV
|
|
Breaking of Capacitance Load
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50 A
|
50 A
|
25 A
|
|
Closed Loop breaking current COS <I> = 0.31 ND
|
630 A
|
630 A
|
630 A
|
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Rated Transformer Off Load Breaking capacity
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120 A
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120 A
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120 A
|
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Rated Line Charging Breaking Capacity
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90 A
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90 A
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90 A
|
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Rated Cable Charging Breaking Capacity
Dimensions {Ref. Drg. Enclosed)
|
90 A
|
90 A
|
90 A
|
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{ j) Between Poles {Centres) mm
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150-210
|
150-210
|
175-250
|
|
{ii) Between Open Contacts mm
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140
|
140
|
235
|
|
{iii) Between live parts and earth mm
|
130
|
130
|
210
|
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Making Time 35 M. Sec.
|
|
|
|
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Arc Duration 5-20 M.Sec.
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|
|
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SELECTION TABLE
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DESCRIPTION
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TYPE REFERENCE
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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.
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D
D – SA-AA D – UH
D – UH -SA
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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
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Note:
Any accessory, if required, should be specified in addition to the above type reference.
