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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 |
