Catalogs > Industrial Controls Catalog > Motor Control, NEMA > Combination Contactors, Starters, and Pump Control Panels > Bulletin 523 Multi-Speed Circuit Breaker Type

Bulletin 523 Multi-Speed Circuit Breaker Type

Introduction

Standards Compliance and Certifications

Configuration of a Basic Combination Starter

Product Selection

Modifications for Combination Devices

Accessories

Specifications

Full Load Motor Currents

Approximate Dimensions

Heater Element Selection

Renewal Parts

Product Overview

Bulletin 523

NEMA starter sizes 1…5
Circuit breaker magnetic only (instantaneous trip)
2-speed separate winding, constant or variable torque
2-speed separate winding, constant horsepower
2-speed consequent pole, single winding, constant or variable torque
2-speed consequent pole, single winding, constant horsepower
Overload relays: Eutectic supplied as standard, solid-state available as an option
Modifications — factory installed
Accessories — field installed
Service entrance rated

A Bulletin 523 combination multi-speed starter consists of a Bulletin 520 multi-speed starter and a circuit breaker magnetic only (instantaneous trip) mounted in a common enclosure.