11kV-33kV Oil Cooled Outdoor Type Combined CTPT/CTVT Unit

  • 11kV-33kV Oil Cooled Outdoor Type Combined CTPT/CTVT Unit
Key attributes
Brand ROCKWILL
Model NO. 11kV-33kV Oil Cooled Outdoor Type Combined CTPT/CTVT Unit
Rated voltage 33kV
Rated frequency 50Hz
Series RMR
Product descriptions from the supplier
Description

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:

  • Outer chamber or tank: Made of Mild Steel having inner and outer coats of branded primer and enamel paint or hot-dipped galvanized as per customer’s requirement.
  • Insulators: Procured from reputed manufacturers like GE, Tayal, etc, confirm to latest IS standards and specifications having sufficient creepage distance.
  • Primary and Secondary Winding: Coated Super Enamelled round copper wire from reputed manufacturers like BIC, Atlas, etc confirming to latest IS Standards is used. Insulation using high-quality craft paper is done with alternate layers.
  • Core: Nano type, CRGO, HPDR, MOH, M-4, M-3, or ZDKH toroidal core is used for CT depending on customer’s requirement. The high-Quality core is used in PT.
  • Transformer Oil: The oil is filtered with 5 stage filtration process like heating degassing, vacuumed and dried, etc and filled under vacuum. Transformer oil is confirming to IS 335 and procured from reputed suppliers like APAR, Savita.
  • Testing: Each unit undergoes all routine tests in our state of the art lab, by our well experienced and well-qualified engineers before dispatch.
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
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