Página 29 - elastimold

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United States
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800.816.7809
Fax: 901.252.1354
Technical Services
Tel: 888.862.3289
www.tnb.com
H-89
Hi-Tech
®
OS Series Back-Up Current-Limiting Fuses
Power & High Voltage —
Elastimold
®
& Hi-Tech
®
Fuse Products
3-Phase Transformer Coordination for Expulsion and Trans-Guard
®
OS Shorty Fuses
kVA
Trans-Guard
®
OS Shorty Fuse Voltage Rating (kV)
8.3kV
15.5/17.2kV
23kV
Transformer Voltage Rating (kV) Phase-to-Phase
2.4
4.16–4.8
7.2–7.96
12–12.47
13.2–14.4
20.8
d
24.9
d
23.0
27.6
d
34.5
d
Link Shorty Link Shorty Link Shorty 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
45 C10 125 C08 65 C05 40 C03 30 C03 30 C03 30 C03 30 C03 30 C03 30 C03 30
75 C12 165 C10 125 C08 65 C05 30 C05 30 C03 30 C03 30 C03 30 C03 30 C03 30
112.5 C14 300* C12 150 C08 80 C08 50 C08 50 C05 30 C05 30 C05 30 C05 30 C03 30
150 C14 300* C12 165 C10 125 C08 65 C08 65 C05 30 C05 30 C05 30 C05 30 C05 30
225 C18 400* C14 300* C12 150 C10 100 C10 80 C08 50 C08 50 C08 65 C08 65 C05 30
300 C18 400* C14 300* C12 150 C10 100 C10 100 C08 50 C08 50 C08 65 C08 65 C05 30
500 — — C18 400* C14 200 C12 125 C12 125 C10 80 C10 80 C10 80 C10 80 C08 65
750 — — C18 400* C18 330* C14 150 C14 150 C12 125 C12 125 C12
e
130* C10 80 C10 80
1000 — — — — C18 330* C14 165 C14 165 C12 125 C12 125 C12
e
130* C12 130* C10 80
1500 — — — — — — C18
d
300* C18
d
300* C14 165 C14 150 C14
e
200* C14 200* C12 130*
2000 — — — — — — — — — — — — C14 165 — — C14 200* C14 200*
Current Sensing Bay-O-Net (4000353___)
a,b
and OS Shorty Fuse Coordinations
45 C10 100 C08 40 C06 40 C04 30 C04 30 C04 30 C04 30 C04 30 C04 30 C04 30
75 C12 125 C10 100 C06 40 C06 30 C06 30 C04 30 C04 30 C04 30 C04 30 C04 30
112.5 C12 165 C10 100 C08 65 C06 40 C06 30 C06 30 C04 30 C04 30 C04 30 C04 30
150 C14 165 C12 125 C10 100 C08 40 C08 40 C06 30 C06 30 C06 30 C06 30 C04 30
225 C16 200 C14 150 C10 100 C10 65 C10 65 C08 40 C08 30 C08 30 C06 30 C06 30
300 C17 300* C14 150 C12 125 C10 80 C10 65 C08 40 C08 30 C08 30 C08 30 C06 30
500 — — C17 300* C14 150 C12 125 C12 100 C10 65 C10 65 C10 65 C10 65 C08 30
750 — — C17 300* C16 200 C14 150 C14 150 C12 80 C12 80 C12 80 C10 65 C10 65
1000 — — — — C17 300* C14 150 C14 150 C12 100 C12 100 C12 100 C12 80 C12 80
1500 — — — — — — C16 250* C16 250* C14 150 C14 150 C14
e
160* C14 160* C12 100
2000 — — — — — — — — C17
e
300* C16 250* C16 250* C16
e
200* C14 160* C14 160*
2500 — — — — — — — — — — C17
e
300* C16 250* — — — — — —
Dual Element Bay-O-Net (4038108___)
a,c
and OS Shorty Fuse Coordinations
45 C09 100 C07 65 C04 40 C03 30 C03 30 C03 30 C03 30 C03 30 C03 30 C03 30
75 C12 125 C09 100 C06 40 C04 30 C04 30 C03 30 C03 30 C03 30 C03 30 C03 30
112.5 — — C11 125 C07 65 C06 40 C06 40 C05 30 C04 30 C04 30 C03 30 C03 30
150 — — C12 125 C09 100 C07 50 C07 50 C06 40 C05 30 C05 30 C04 30 C03 30
225 — — — — C11 100 C09 65 C09 65 C07 50 C06 30 C06 40 C06 40 C05 30
300 — — — — C12 125 C09 80 C09 80 C09 65 C07 50 C07 50 C07 50 C06 40
500 — — — — — — C12 100 C12 100 C11 80 C09 65 — — — — C07 50
750 — — — — — — — — — — C12 100 C11 80 — — — — — —
1000 — — — — — — — — — — — — 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 on
page H-87.
If the impedance is higher, a smaller fuse can often be used.
* Indicates parallel fuse applications.
a. Or equivalent bayonet 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 ambient temperature of 35° C.
d. Applications are limited to gnd Y-gnd Y connected transformers with no more than 50% delta connected secondary load.
Phase-to-ground rated fuses are frequently recommended for gnd Y-gnd Y connected transformers.
e. Bay-O-Net assembly may be subjected to damage during fault clearing at currents above the Bay-O-Net’s Maximum I/C.