| Brand | ROCKWILL |
| Model NO. | 11kV-33kV Oil Cooled Outdoor Type Combined CTPT/CTVT Unit |
| Rated voltage | 33kV |
| Rated frequency | 50Hz |
| Series | RMR |
Product Description
Rock will is one of the leading manufacturers of 11kV to 33kV oil cooled/immersed; pole-mounted combined CTPT/CTVT Unit for outdoor installation used in metering purpose. Our product is being manufactured using industry best practices/processes and is 100% tested before final dispatch as per NABL guidelines in our state of the art fully equipped lab under the supervision of experienced and well-qualified engineers. Our product is fully type tested as per the latest standards from government/NABL approved laboratories like ERDA/CPRI.
Units are available in 3 Phase 3 Wire or 3 phase 4 wire system used for single or double metering or as per customer’s requirements.
Our product confirms to following standards and latest amendments. All products are confirming to following standards:
| Specification | Title |
| IS 2705: 1992 | Specification for Current Transformer |
| IS 3156: 1992 | Specification for Voltage Transformers/Potential Transformers |
| IS 335: 1983 | Specification for Transformers Oil |
| IS 2099: 1986 | Specification for bushing for AC voltage above 1kV |
| IS 5561 | Specification for Terminal Connector |
| IS 4201 | Application Guide for Current Transformer |
Features:
| General Particulars | 11kV | 33kV |
| Highest System Voltage( H.S.V.) | 12 kV (r.m.s.) | 36 kV (r.m.s.) |
| Power frequency dry/ wet withstand voltage on the primary winding for one minute | 28 kV (r.m.s.) | 70 kV (r.m.s.) |
| 75 kV (r.m.s.) | 170 kV (r.m.s.) |
System Particulars
| No. Of CTs and PTs | 3 Nos. CTs & 1 No. 3 – Phase PT |
| 3 Nos. CTs & 3 Nos. 1 – Phase PT or as per specifications. |
Specific Particulars
| Short Time Thermal Current (STC) | 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 (Burden) | 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 PT/VT |
| Secondary Current (CT) | 1 Amp or 5 Amp |
| Primary Current (CT) | 5A to 1200A or as per customer requirement. |
| Primary Voltage (PT/VT) | 11kV, 22kV, 33kVfor 3-Phase VT & 11/v3, 22/v3, 33/v3 for 1-Phase VT |