Description
ZW32 40.5kV Outdoor Vacuum Circuit Breaker Overview
The ZW32-40.5 is an outdoor vacuum circuit breaker with published 630 A, 1,250 A, and 1,600 A current options for 40.5 kV systems. The technical table lists 25 kA short-circuit breaking current, 80 kA peak making and withstand current, and 20,000 mechanical operations.
The existing page describes a pillar-type structure with a vacuum interrupter, operating mechanism, current transformers, and an optional disconnecting-switch combination. Intelligent control may be configured for reclosing and protection functions; confirm the controller and power-supply arrangement for the project.
Electrical Ratings
| Parameter | Published value |
|---|---|
| Rated voltage | 40.5 kV |
| Rated current | 630 A / 1,250 A / 1,600 A |
| Rated frequency | 50 / 60 Hz |
| 1-minute power-frequency withstand voltage, wet/dry | 80 / 95 kV |
| Lightning impulse withstand voltage, peak | 185 kV |
| Rated short-circuit breaking current | 25 kA |
| Rated short-circuit making current, peak | 80 kA |
| Rated peak withstand current | 80 kA |
| 4-second short-time withstand current | 31.5 kA |
| Short-circuit breaking operations | 30 |
| Mechanical life | 20,000 operations |
| Intelligent-mechanism control voltage | DC 220 V |
| Secondary-circuit 1-minute withstand voltage | 2 kV |
Current Transformer and Control Options
The page lists current-transformer ratios of 100:5, 200:5, 400:5, 800:5, 1000:5, and 1600:5, with up to four windings per phase described for measurement and protection. Confirm ratio, winding allocation, controller, protection logic, auxiliary supply, and disconnecting-switch requirement.
Information for an Inquiry
Provide rated current, prospective short-circuit current, CT ratio and winding requirements, operating sequence, controller functions, auxiliary supply, and whether a visible disconnecting break is required.
FAQ
Which rated currents are listed?
What short-circuit ratings are listed?
Which CT ratios are listed?
What mechanical life is published?
What should be provided for selection?
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