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CT-PT Combined Metering Units Macroplast manufactures CT-PT Combined metering units used for ''3 phase 3 wire metering system'' or for ''3 phase 4 wire metering system''. Advantages of CT-PT Combined metering units over single phase units are :- - Compact unit. Easier to handle
- Less in weight and volume compared to 5/6 single phase units
- Low costs. Combined units are approximately 30-40 % cheaper viz-a-viz 5/6 single phase units
Construction Features : - Primary Terminal
- Bushing (C.D. - 380mm min.)
- Name Plate
- Main Tank
- Earthing Paid
- Mounting Holes
- Oil Filling Socket
- Lifting Lugs
- Secondary Terminal Box
- Oil Drain Plug
- Base Channel (75mmx40mm)
- Oil Level Indicator
- Pressure Release Diaphrame
Technical Specifications of CT-PT Metering Units and Panels | 3 Phase 4 wire with neutral solidity earthed system | Having : 3 Nos. CTs and 1 Nos. 3 Phase PT | | 3 Phase 3 wire with neutral solidity earthed system | Having : 3 Nos. CTs and 1 Nos. 3 Phase PT | | General Particulars | Metering Unit/Panel | | Nominal System Voltage (kv) | 11 |
| | Highest System Voltage (kv) | 12 |
| | H V Power freq. Withstand volt. For Primary Winding 1 Min (kv) | 28 |
| | H V Power freq. Withstand volt. For Secondary Winding 1 Min (kv) | 3 |
| | Impulse withstand voltage (kvp) | 75 |
| | PD measuring voltage | 7.6 |
| | Rated Frequency (Hz) | 50 Hz | | Current Transformer | Potential Transformer | | Rated Burden : 2.5 to 30 VA | Rated Burden : 10 to 100 VA | | Rated Primary Current (Amp): 2.5 Amp to 800 Amp | Rated Primary Voltage : 11 KV & 33 KV | | Rated Secondary current (Amp) : 1 Amp to 5 Amp | Rated Secondary Voltage : 110 volt | | Rated Short Time Thermal Current: 3 KA to 25 KA for 1/3 second | Rated Voltage factor : 1.2 cont. & 1.5 for 30 seconds | | Accuracy class (IS/IEC standard) : 0.2S ; 0.2; 0.5s ; 0.5 ; 1.0 | Accuracy class (IS/IEC standard) : 0.2, 0.5, 1.0 | | Rated Instrument Security factor : Less than 5 |
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| Applicable Standards for CT-PT Metering Units & Panels The standards followed by Macroplast for design and manufacturing of CT-PT Metering Units & Cubicles are : - IEC : 60044-1, 2 & 3
- ISS : 2705 & 3156
- BSEN : 60044-1&2
- ANSI : C.57.13
** Further, Macroplast also possesses the expertise to manufacture CT-PT Metering Units * Panels as per client specifications and requirements
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