Section 1 Introduction; Type W-Vac Breaker Ratings; Table 1.1 Type W-Vac Vacuum Circuit Breaker Ratings - Eaton Cutler-Hammer 36W-VAC25 Instructions For Installation, Operation And Maintenance

I.B. 3A74499B
SECTION 1: INTRODUCTION
The purpose of this book is to provide instructions for
unpacking, storage, installation, operation and mainte-
nance of Type W-VAC Vacuum Circuit Breakers. Type
W-VAC is a horizontal drawout type removable inter-
rupting element design. It was designed specifically to
IEC 56 Standards for reliable performance, ease of
handing, and simplified maintenance. Type W-VAC can
be applied in both single tier or double tier switchgear
applications, with the basic breaker element applicable
to retrofitting. Reliable control and protection for medium
voltage equipment and circuits are achieved though the
use of Type W-VAC Vacuum Circuit Breakers.

1-1 TYPE W-VAC BREAKER RATINGS

Refer to Table 1.1

Table 1.1 Type W-VAC Vacuum Circuit Breaker Ratings

Circuit Rated
Breaker Voltage
Type at
50-60HZ
kV
36W-VAC25 3.6
72W-VAC16 7.2
72W-VAC20 7.2
72W-VAC25 7.2
72W-VAC32 7.2
120W-VAC16 12
120W-VAC20 12
120W-VAC25 12
120W-VAC32 12
120W-VAC40 12
150W-VAC16 15
150W-VAC20 15
150W-VAC25 15
150W-VAC32 15
Effective 11/97
Frequency Rated Short Circuit
Breaking Current
& Short Circuit
Duration
Hz kA
50/60 25
50/60 16
50/60 20
50/60 25
50/60 31.5
50/60 16
50/60 20
50/60 25
50/60 31.5
50/60 40
60 16
60 20
60 25
60 31.5
SATISFACTORY PERFORMANCE OF THESE
BREAKERS IS CONTINGENT UP-ON PROPER
APPLICATION, CORRECT INSTALLATION AND
ADEQUATE MAINTENANCE. THIS INSTRUCTION
BOOK MUST BE CAREFULLY READ AND FOL-
LOWED IN ORDER TO OBTAIN OPTIMUM PERFOR-
MANCE FOR LONG USEFUL LIFE OF THE CIRCUIT
BREAKERS.
TYPE W-VAC BREAKERS ARE PROTECTIVE
DEVICES, AS SUCH, THEY ARE MAXIMUM RATED
DEVICES. THEREFORE, THEY SHOULD NOT
UNDER ANY CIRCUMSTANCES BE APPLIED OUT-
SIDE THEIR NAMEPLATE RATINGS.
Rated Insulation Level
Lighting Power
Pulse Frequency
Withstand Withstand
Voltage Voltage
Sec kV kV
3 40 10
3 60 20
3 60 20
3 60 20
3 60 20
3 75 28
3 75 28
3 75 28
3 75 28
3 75 28
3 95 36
3 95 36
3 95 36
3 95 36
!
WARNING
Rated Rated Nominal Current
Short
Circuit
Making
Current
kA (Peak) Amperes
63 630, 1250, 2000
40 630, 800, 1250
50 630, 800, 1250, 1600
63 630, 800, 1250, 1600, 2000
79 1250, 2000
40 630, 800, 1250
50 630, 800, 1250, 1600
63 630, 800, 1250, 1600, 2000
79 1250, 2000
100 1250, 2000
40 630, 800, 1250
50 630, 800, 1250, 1600
63 630, 800, 1250, 1600, 2000
79 1250, 2000
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