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Sasa manufacture CT:PT combined units up to 33KV. CT:PT Combined unit are also called metering units. These units can be offered as Dry Type or Oil Immersed and  are generally pole mounted. The units are available in three phase three wire or three phase four wire system. CT: PT unit used for single or double metering with trivector meter and energy meter.

Units are available in different type of designs:-    

• 02 nos. Single phase CT&1 nos three phase

• PT03 nos. Single phase CT & 1 nos three phase PT

• 02 nos. Single phase CT & 3 nos three phase PT

• 03 nos. Single phase CT & 3 nos three phase PT
 
11 KV 33 KV
 
Technical Specification
 
General Particulars 11KV 33 KV
Highest System Voltage( H.S.V.) 12 KV
( r.m.s.)
36 KV (r.m.s.)
Power frequency dry/ wet withstand voltage on primary winding for one minute 28 KV
( r.m.s.)
70 KV ( r.m.s.)
Lightning Impulse withstand Voltage ( 1.2 x 50 ?s ) 75 KV
( r.m.s.)
170 KV ( r.m.s.)
System Particaulars  
3 Phase 4 Wire with Isolated / Floating neutral as well as solidly earthed.

3 Nos. CTs & 1 No. 3 - Phase PT
3 Nos. CTs & 3 Nos. 1 - Phase PT

3 Phase 4 Wire with Isolated / Floating neutral as well as solidly earthed. 2 Nos. CTs & 1 No. 3 - Phase PT
2 Nos. CTs & 3 Nos. 1 - Phase PT
Specific Particulars  
Short Time Thermal Current (Ith) As per customer requirement.
In general CT is to be specified with STF of 100 for 1 Sec. or STC (lth) equal to the system fault level whichever is lower. KA ( r.m.s. )
Output 10 VA to 100 VA for VT
5 VA to 30 VA for CT
Accuracy Class 0.2S, 0.2, 0.5S, 0.5, 1.0 for CT.
0.2, 0.5 & 1.0 for VT
Secondary Current (CT) 1 Amp or 5 Amp
Primary Current (CT) As per customer requirement.
Primary Voltage (VT) 11KV, 22KV, 33KV for 3-Phase VT
11/v3, 22/v3, 33/v3 for 1-Phase VT
 
   
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