Overview
The PBO and PBO-1 are single pole, hookstick operated disconnect switches known for their reliability and performance in distribution substation circuits. They comply with ANSI standards and are suitable for installations requiring high reliability.

Features

• Safe and low effort operation for opening and closing.
• Trussed blade design allows closure from various angles.
• PBO adheres to NEMA 30º temperature rise standards, while PBO-1 follows ANSI standards.
• Available in "V" mounting configurations.

Specifications

• Maximum Voltage Ratings: 8.25 kV – 72.5 kV
• Continuous Current Rating: 2000 A
• Short Time Current (3 Sec): 50 kA & 63 kA
• Peak Withstand Current: 130 kA & 164 kA

Construction

• Switch blade made of hard drawn copper.
• Stainless steel operating eye.
• Cast bronze latch.
• One-piece solid cast bronze hinge and jaw, optionally tinned.
• Silver to copper jaw and hinge contacts, with silver to silver as an option.

Dimensions and Weight
The document provides detailed dimensions and weights for various configurations, indicating the flexibility in installation.

Ratings

• PBO: Maximum Voltage Rating up to 72.5 kV, Short Time/Peak Current 63/164 kA, NEMA 30º temperature rise.
• PBO-1: Maximum Voltage Rating up to 48.3 kV, Short Time/Peak Current 50/130 kA, ANSI temperature rise.

Additional Notes

• Hot dip galvanized steel channel base.
• Stainless steel springs for jaw contact pressure and operating eye.
• Heavy-duty bronze Belleville spring washers for hinge contact pressure.
• NEMA standard post insulators available.
• Blade opening can be customized to 90º, 135º, or 180º.