Instrument transformers with silicon rubber insulators For outdoor applications upto 800kV

– Excellent performance even in polluted environments

– Light weight and splinter-proof

– UV stability - minimized discharge of leakage current

– Hydrophobic property ensures good tracking resistance

– For outdoor applications up to 800kV

Technology comparison chart

Porcelain EP rubber Silicon rubber

Brittle Low Excellent Excellent

Insulation Good Good Excellent

Weight High Low Low

Mechanical Strength Low Good Excellent

Safety Low Good Excellent

Earthquake Low Excellent Excellent

Handling Low Excellent Excellent

Maintenance Fair Fair Excellent

Ageing Slow Slow Very slow

IMB current transformer

Installation Outdoor

Design Dead tank (hair pin primary)

Insulation Oil-paper-quartz

System voltage 72.5-800 kV

Primary current Up to 4000 A

Short-circuit current Up to 63 kA/ 1.0 Sec

Creepage distance > 25 mm /kV

Ambient temperature -450 C to + 500 C

Other data upon request

Instrument Transformer Flyer_04 - FINAL.indd 1 4/9/2011 9:48:55 AM

WN/WP/WS capacitor voltage transformers (CVT)

Installation Outdoor

Design Capacitor type

Insulation, CVD Paper/ polypropylene film/ oil

Insulation, EMU Epoxy resin encapsulated / paper insulated & oil

System voltage 72.5-800 kV

Voltage factor 1.2 cont & 1.5 for 30 sec

Creepage distance > 25mm/kV

Ambient temperature -450 C to +500 C

Other data upon request

ABB LimitedInstrument Transformers Maneja Vadodara - 390 013, India Phone: +91-265-2604287, 2604288 2604290, 2604296 Fax: +91-265-2638906

www.abb.co.in

Note: We reserve the right to make technical changes or modify the contents of this document without prior notice. With regard to purchase orders, the agreed particulars shall prevail. ABB does not accept any responsibility whatsoever for potential errors or possible lack of information in this document.

We reserve all rights in this document and in the subject matter and illustrations contained therein. Any reproduction, disclosure to third parties or utilization of its content - in whole or in parts - is forbidden without ABB’s prior written consent.

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