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Instructions for VR-Series
Replacement Breakers for
Westinghouse Type B20B/B22B
I.B. 94A1994R01
Page 5
Effective: April 2005
IB01301018E
SECTION 1: INTRODUCTION
The purpose of this book is to provide instructions for receiving and
handling, storage, installation, operation and maintenance of B20B /
B22B Type Vacuum Replacement Circuit Breakers (also referred to
as VR-Series). The vacuum unit replacement breakers are
designed to be used in existing Westinghouse type B20B / B22B
metal-enclosed switchgear. VR-Series Circuit Breakers provide
reliable control, protection and performance, with ease of handling
and maintenance. Like ratings are interchangeable with each other.
1.1 AVAILABLE B20B / B22B-VR BREAKERS
Refer to Table 1.1
SATISFACTORY PERFORMANCE OF THESE BREAKERS IS
CONTIGENT UPON PROPER APPLICATION, CORRECT INSTALLA-
TION AND ADEQUATE MAINTENANCE. THIS INSTRUCTION
BOOK MUST BE CAREFULLY READ AND FOLLOWED IN ORDER
TO OBTAIN OPTIMUM PERFORMANCE FOR LONG USEFUL LIFE
OF THE CIRCUIT BREAKERS.
VR-SERIES BREAKERS ARE PROTECTIVE DEVICES, AS SUCH,
THEY ARE MAXIMUM RATED DEVICES. THEREFORE, THEY
SHOULD NOT UNDER ANY CIRCUMSTANCE BE APPLIED
OUTSIDE THEIR NAMEPLATE RATINGS.
Table 1.1 - B20B / B22B-VR Vacuum Circuit Breaker Availability and Interchangeability
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