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Metering Sets (CTPT) combination of Current Transformers & Potential Transformers

ENERGY TEC manufactures Outdoor Oilcooled CTPT combined Metering unit upto 33KV for customer requirements as per IS 2705/1992 & IS 31546/1992, IS 60044(1) & IS 60044(2), and IEC 61869 (1) & IEC 61689(2). ENERGY TEC undertake Design, Manufacture and Supply of Instrument Transformers comprising of Current Transformers & Voltage / Potential Transformers with a notion right from LT class upto 33KV Class, an indigenous venture whose Quality matches upto international standards and meeting the stringent tropical service requirements. 11 KV and 33KV CTPT Combined Metering Unit is an oil cooled system. This system can be made in 3 phase 3 wire and 3 phase 4 wire configurations. This is suitable to be mounted on single as well as double pole system.

CTVT combined Metering unit can be offered suitable for the following system.
  • Three phase, Three wire system with one three phase VT (with HV Neutral unearthed ) and two CT's per unit of required creepage.
  • Three phase, Four wire system with one three phase VT (with HV Neutral unearthed ) and Three CT's per unit of required creepage.

These are combination of Current & Potential Transformers units used for 3 Phase HT Metering purposes in Indoor or Outdoor applications, with accuracy upto 0.2S class.

  • Used for HT Metering
  • Voltage Class: 11KV / 22KV / 33KV class
  • Oil Filled Outdoor or indoor type
  • Manufacturing as per IS & IEC standards.
  • Primary Current, Accuracy Class, Burden and Number of Secondary Cores / Windings as Specified.
Technical Specification As Per IS:2705& IS:3156
General Particulars 11KV 22KV 33 KV
Highest System Voltage ( H.S.V.) 12 KV ( r.m.s.) 24 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.) 70 KV ( r.m.s.)
Lightning Impulse withstand Voltage ( 1.2 x 50 μs ) 75 KV ( r.m.s.) 140 KV ( r.m.s.) 170 KV ( r.m.s.)
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
Secondary Voltage (VT) 110 Ph-Ph or
110/v3 V, Ph-Neutral
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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