STB-L Series Combined Wall Bushing -
Current Transformer Performance
RHM is proposing a combined wall bushing and current transformer option for specific applications.
Very compact, it uses a tore type current transformer mounted around the bushing.
Performance
- Rated highest voltage: 40.5 - 252kV
- Rated transformation ratio: 100~2500/5A or 100~2500/1A
- Rated frequency: 50Hz-60Hz
- Rated output: 20-40VA
- Metering accuracy class: 0.2S, 0.2, 0.5S and 0.5 class
- Accuracy limit factor 5,10, 15, 20, 30, 40
- Protection accuracy class: 5P, 10P
- Accuracy limit factor: 5,10,15,20,25,30
- Secondary windings: 1-6
Operational Conditions
- Environmental temparature: -50C [-58F]/ +45C [113F]
- Altitude: <1000m above sea level (when higher than 1000m, specific design available. Please contact us)
- Creepage distances: in the range 25 to 31 mm/kV
Typical dimensions – please contact us for custom designs:
Model
and
Specification |
Highest Voltage
for
Equipment
(kV) |
Rated
Current
(A) |
Dimensions (mm) |
Creepage
Distance
(mm) |
L |
L1 |
L2 |
L3 |
L4 |
a1 |
a2 |
b1 |
b2 |
| STB - L - 40.5 / 630 |
40.5 |
630 |
1640 |
350 |
450 |
350 |
1045 |
40 |
80 |
300 |
360 |
1015 |
| STB - L - 40.5 / 2000 |
40.5 |
2000~2500 |
1740 |
350 |
450 |
350 |
1095 |
60 |
120 |
300 |
360 |
1015 |
| STB - L - 72.5 / 630 |
72.5 |
630 |
2770 |
630 |
1000 |
630 |
1550 |
40 |
80 |
350 |
400 |
1925 |
| STB - L - 72.5 /1600 |
72.5 |
1600 |
2820 |
630 |
1000 |
960 |
1575 |
50 |
100 |
350 |
400 |
1925 |
| STB - L - 126 / 630 |
126 |
630 |
3470 |
960 |
1100 |
960 |
1850 |
40 |
80 |
350 |
400 |
3200 |
| STB - L - 126 / 2000~2500 |
126 |
2000 |
3620 |
960 |
1100 |
960 |
1930 |
60 |
120 |
350 |
400 |
3200 |
More Information
To view our technical papers, click here:
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