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HIVOLTRANS ELECTRICALS PVT. LTD.

 

An ISO 9001 : 2000 Certified Company

132 KV SINGLE PHASE CURRENT TRANSFORMER

Rated Voltage (kV)

132 /110 /100

Type of Installation

Outdoor, Pedestal Mounted, Upright Standing, Effectively Earthed.

Insulation Level (kV)

275 / 650 or 230 / 550

Operating Frequency (Hz)

50 / 60

Primary Current (Amps)

50 to 2400

Short Time Thermal Current (kA/Sec)

Tested Value 40kA / 3 Sec.

Dynamic Current (kAp)

Tested Value 100 kAP, Suitable upto 125 kAP

Number of Secondaries

Normal - 5, Max. 6

Accuracy Class

Metering - 0.5 (Regular), 0.2 (special) & Protection - All classes as per relevant standards.

Type of Design

Dead Tank

Type of Sealing

By Stainless Steel Bellows or Nitrogen Cushion

Reference Standards

IEC - 185 / ISS 2705

Creepage Distance Available (mm)

3650

Shipping dimensionis(L x B x H)(mm)

900 x 900 x 2500

Shipping Weight (Kg)

600

Manner of Packing

By Wooden Box

Manner of Transportation

Vertical

OTHER FEATURES :

DESIGN :

i). Insulation - Class A Oil impregnated paper insulation with grading type design. This design results in uniform distribution of stress giving excellent transient stability and low levels of partial discharge. 

ii). Processing & Oil Filling - CTs are dried and oil filled under very high vacuum (0.05 torr), after going through rigorous process cycles at high temperatures and vacuum (105 deg. C to 120  deg. C and 0.05 torr). 

iii). Ratio Changing - Different ratios can be selected with reconnections on primary or secondary sides.

iv). Hermetic Sealing - The CTs are hermetically sealed using Stainless Steel Bellows OR Nitrogen Cushion which effectively prevents the contamination of Transformer Oil with atmosphere, during its service life.

CONSTRUCTION :

The CTs are of Dead Tank type with main weight of cores and insulation at bottom giving very good mechanical stability considering the extra height of the equipment. INSULATORS used are Hollow types with ALTERNATE SHED Design as per latest IEC recommendation. They are most suitable for HOT LINE WASHING. The design is indigenous based on 25 years of experience in EHV technology and its implementation  in extreme climatic conditions of India, right from the hilly region of  North & NE to down South & SW Sea Level. All metal parts exposed to atmosphere are either hot dip galvanized or epoxy painted. The primary windings are wound with EC grade copper tubes  or copper  strips  covered with fiberglass insulation. The primary winding is adequately reinforced to withstand repeated mechanical forces developed during the passage of very high short circuiting currents through the CT, due to various faults developed in the system.

Secondary cores are wound with super enameled hermetic grade or PVA based EC copper rounds. The inter - layer insulation is adequately reinforced to withstand the  operating  voltages  as well as transient over-voltages.

TESTING :

All CTs are tested for routine test as per relevant standards. Type tests are frequently carried out to keep the quality check. Facilities for type tests such as temperature Rise and High Voltage Power Frequency Tests (both Wet & Dry), are available in our Lab.

PACKING & TRANSPORTATION :

The CTs are packed in Wooden Crates suitably so that they can be transported Vertically.

WEBSITE DESIGNED AND MAINTAINED BY - VINEET G. AKRE (MANAGEMENT REPRESENTATIVE, HIVOLTRANS ELECTRICALS PVT. LTD.)