Página 28 - elastimold

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Fax: 901.252.1354
Technical Services
Tel: 888.862.3289
H-88
Hi-Tech
®
OS Series Back-Up Current-Limiting Fuses
Power & High Voltage —
Elastimold
®
& Hi-Tech
®
Fuse Products
Single-Phase Transformer Coordination for Expulsion & Trans-Guard
®
OS Shorty Fuses
Fuse Voltage
Trans-Guard
®
OS Shorty Fuse Voltage Rating (kV)
8.3kV
15.5/17.2kV
23kV
kVA
Transformer Voltage Rating (kV) Phase-to-Ground
2.4
4.16–4.8
7.2–7.96
12–12.47
13.2–14.4
16
19.9
LINk shorty link shorty LINk shorty LINk shorty LINk shorty LINk shorty LINk shorty
Dual Sensing Bay-O-Net (4000358___)
a,c
and OS Shorty Fuse Coordinations
5
C03
40
C03
40
C03
40
C03
30
C03
30
C03
30
C03
30
10
C05
40
C05
40
C03
40
C03
30
C03
30
C03
30
C03
30
15
C08
65
C05
40
C03
40
C03
30
C03
30
C03
30
C03
30
25
C10
100
C08
65
C05
40
C03
30
C03
30
C03
30
C03
30
37.5
C12
150
C10
100
C08
50
C05
30
C05
30
C03
30
C03
30
50
C12
165
C10
125
C08
65
C05
30
C05
30
C05
30
C05
30
75
C14
300*
C12
150
C10
100
C08
65
C08
50
C08
50
C05
30
100
C14
330*
C12
165
C10
125
C08
80
C08
65
C08
65
C05
40
167
— — C14
300*
C12
150
C10
100
C10
100
C10
100
C08
65
250
— — C18
330*
C14
200
C12
125
C12
125
C10
100
C10
80
333
— — C18
330*
C14
200
C12
125
C12
125
C12
125
C10
80
500
— — — — C18
330*
C14
165
C14
165
C12
125
C12
130*
kVA
Current Sensing Bay-O-Net (4000353___)
a,b
and OS Shorty Fuse Coordinations
5
C04
40
C04
40
C04
40
C04
30
C04
30
C04
30
C04
30
10
C06
40
C04
40
C04
40
C04
30
C04
30
C04
30
C04
30
15
C08
40
C06
40
C04
40
C04
30
C04
30
C04
30
C04
30
25
C10
80
C08
40
C06
40
C04
30
C04
30
C04
30
C04
30
37.5
C10
100
C08
65
C06
40
C06
30
C06
30
C04
30
C04
30
50
C12
125
C10
100
C08
40
C06
30
C06
30
C06
30
C04
30
75
C14
165
C12
125
C10
80
C08
40
C08
40
C06
30
C06
30
100
C14
200
C12
150
C10
100
C08
50
C08
40
C08
40
C06
30
167
C17
300*
C14
165
C12
125
C10
80
C10
80
C10
65
C08
40
250
— — C16
200
C14
150
C12
100
C12
100
C10
65
C10
65
333
— — C17
300*
C16
200
C14
150
C12
100
C12
100
C12
80
500
— — — — C17
300*
C14
150
C14
150
C14
150
C12
100
kVA
Dual Element Bay-O-Net (4038108___)
a,c
and OS Shorty Fuse Coordinations
5
C03
40
C03
40
C03
40
C03
30
C03
30
C03
30
C03
30
10
C05
40
C04
40
C03
40
C03
30
C03
30
C03
30
C03
30
15
C07
50
C05
40
C03
40
C03
30
C03
30
C03
30
C03
30
25
C09
100
C06
40
C04
40
C03
30
C03
30
C03
30
C03
30
37.5
C11
125
C09
80
C06
40
C05
30
C04
30
C03
30
C03
30
50
C12
125
C09
100
C07
50
C06
40
C05
30
C04
30
C03
30
75
— — C12
125
C09
100
C07
50
C06
40
C06
40
C05
30
100
— — C12
125
C09
100
C09
80
C07
65
C07
50
C06
40
167
— — — — C12
125
C11
100
C09
80
C07
65
C07
50
250
— — — — — — C12
100
C11
100
C09
80
— —
333
— — — — — — C12
100
C12
100
C12
100
— —
Notes:
Bay-O-Net fuse selection is based on Cooper Power Systems recommendations.
Bay-O-Net fuses are selected to meet inrush criteria of 12 times transformer full load current for .1 second.
Backup OS Shorty fuses are selected to melt only on internal transformer faults, where transformer impedance
is equal to or greater than the value given in chart on
page H-87
. If the impedance is higher, a smaller fuse can often be used.
* Indicate parallel fuse applications.
a. Or equivalent Bay-O-Net link.
b. Current Sensing Bay-O-Net fuses are selected to melt with three to four times transformer full load current at 300 seconds.
c. Dual Sensing and Dual Element Bay-O-Net fuses are selected to limit transformer load to approximately 160% for seven hours
and 200% for two hours with the transformer initially carrying 75% of load at an ambient temperature of 35° C.