| Brand | ROCKWILL |
| Model NO. | Disconnect Switches |
| Rated voltage | 38kV |
| Rated lightning impulse voltage | 195kV |
| Series | M3 |
Chance Type M3 Disconnect Switches are Single Phase Hook Stick operated units ideal for manual switching up to 38kV 200kV BIL. They are rated either 900A or 600A and are suitable for application on overhead lines or station applications as they can be sourced either with serrated or smooth backstraps for cross arm mounting or station mounting. All M3 disconnects include load break hooks for use with a portable load break tool. These also serve as a blade closing guide. Each switch has silver plated contract areas for smooth current transfer and a positve latching blade mechanism to prevent unwanted opening during surges. Each pull ring has a pry out lever which helps opeing under ice conditions. The Chance M3 units are available with porcelain or ESP Enhanced Silicone Polymer insulating material. Each M3 is tested and manufactured in complete compliance with IEEE C37.30.1 Standard. Chance: The Brand and Quality You Can Trust!!
Fully Compliant with ANSI/IEEE C37.30.1
15, 27 & 38kV Voltage Classes
110, 125, 150, 200kV BIL Insulation Levels
600A & 900A Current Ratings
Porcelain and ESP Polymer Insulator Assemblies with 2.25” Bolt Circles
Distribution Base, Serrated Slots
Load Break Option Available
Application
The Chance M3 Disconnect Switch is a single-phase hookstick-operated switch. It is for manual switching of overhead lines on electrical distribution systems up to 38kV. Design variations allow for applications as a distribution switch or a substation switch.
Rated for 600 or 900 amps continuous, 40,000 amps momentary and 25,000 amps sym. 2-seconds short-time withstand, the M3 may be applied on:
● Dip/Riser poles ● Single crossarm ● Double crossarm ● Aluminum or steel structure
and wherever a disconnect switch is desirable for line sectionalizing. The addition of optional bypass studs allows for bypassing reclosers, regulators, capacitor banks or metering devices.
Operation
All Chance M3 disconnect switches include Loadbreak hooks which serve both as a blade closing guide and for use with a portable Loadbreak tool. To open the switch under load, use only an approved Loadbreak tool and refer to the tool manufacturer for instructions.
Positive latching is provided. Silver-plating on the contact areas enhances efficient current transfer. For easy opening and ice-breaking action, the pull ring activates the latch as a pry-out lever.
Parameters
