Página 30 - elastimold

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United States
Tel: 901.252.8000
800.816.7809
Fax: 901.252.1354
Technical Services
Tel: 888.862.3289
H-90
Hi-Tech
®
OS Series Back-Up Current-Limiting Fuses
Power & High Voltage —
Elastimold
®
& Hi-Tech
®
Fuse Products
Single-Phase Transformer Coordination for Cooper High Ampere Overload Bay-O-Net (4038361_CB) & Trans-Guard
®
OS Shorty Fuses
Fuse Voltage
Trans-Guard
®
OS Shorty Fuse Voltage Rating (kV)
8.3kV
15.5/17.2kV
Transformer Voltage (kV) Phase-to-Ground
kVA
2.4
4.16–4.8
7.2–7.96
12–12.47
13.2–14.4
Link
Shorty
Link
Shorty
Link
Shorty
Link
Shorty
Link Shorty
75
C03
165
— — — — — — — —
100
C03
200
— — — — — — — —
167
C04
300*
C03
165
— — — — — —
250
C05
300*
C04
165
— — — — — —
333
— — C05
300*
C03
150
— — — —
500
— — C05
300*
C04
165
C03
125
C03
125
833
— — — — C05
300*
C04
165
C04
150
3-Phase Transformer Coordination for Cooper High Ampere Overload Bay-O-Net (4038361_CB) & Trans-Guard
®
OS Shorty Fuses
Fuse Voltage
Trans-Guard
®
OS Shorty Fuse Voltage Rating (kV)
8.3kV
15.5/17.2kV
Transformer Voltage RATING (kV) Phase-to-PHASE
kVA
2.4
4.16–4.8
7.2–7.62
12–12.47
13.2–14.4
20.8
a
24.9
a
Link Shorty Link Shorty Link Shorty Link Shorty Link Shorty Link Shorty Link Shorty
112.5
C03
165
— — — — — — — — — — — —
150
C03
165
— — — — — — — — — — — —
225
C04
200
— — — — — — — — — — — —
300
C04 300*
C03
150
— — — — — — — — — —
500
C05 300*
C04
200
C03
150
— — — — — — — —
750
— — C05 300*
C04
150
C03
125
— — — — — —
1000
— — — — C05
200
C04
150
C03 125 — — — —
1500
— — — — C05 300*
C04
165
C04 165 C03 125 C03 125
2000
— — — — — — C05 250*
C05 250*
C04 150 C04 150
2500
— — — — — — C05
b
300*
C05
b
300*
C04 165 C04 150
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 0.1 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.
High Ampere Overload 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.
a 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.
b Bay-O-Net assembly may be subjected to damage during fault clearing at currents above the Bay-O-Net’s maximum I/C.
ABB 34.5kV Protective Links (345B995G___) & 38kV Trans-Guard
®
OS Shorty Fuses
kVA
Assumed
Impedance
Transformer Voltage (kV) L-L
26.4
27.6
34.5
Z%
Link
Shorty
Link
Shorty
Link
Shorty
75
1.6
2
65
2
65
2
65
112.5
1.8
3
65
3
65
2
65
150
2.0
3A
65
3A
65
3
65
225
3.0
4
65
4
65
3A
65
300
3.5
5A
65
5
65
4
65
500
4.0
6
65
6
65
5A
65
750
5.75
7
65
7
65
7
65
1000
5.75
8
80
8
80
7
65
1100
5.75
8
100
8
80
7A
80
1250
5.75
9
125
9
125
7A
80
1500
5.75
9
125
9
125
8
100
1750
5.75
9
125
9
125
9
125
1850
5.75
10
165
9
125
9
125
2000
5.75
10
165
10
165
9
125
2250
5.75
10
165
10
165
9
125
2500–2850
5.75
10
165
10
165
10
165
3000
5.75
— — 10
165
10
165
3250–3800
5.75
— — — — 10
165
Note:
Backup fuses are selected to melt only on internal transformer faults, where transformer impedance is equal to, or greater than, the value given. For transformers having lower impedances, consult the factory.