ABB UniGear ZS1 - Page 13

13
Incoming Feeder, UniGear ZS1 12 / 17.5 kV, 3 600 A
Current
(ambient
temperature
max. 40°C)
Current
(ambient
temperature
max. 45°C)
Current
(ambient
temperature
max. 50°C)
Current
(ambient
temperature
max. 55°C)
FAN 1 FAN 2
Note
Circuit Breaker Current transformers
< 3 200 A < 3 070 A < 2 940 A < 2 800 A No -
fan is
stopped
≥ 3 200 A ≥ 3 070 A ≥ 2 940 A ≥ 2 800 A Yes -
fan starts
operation
Incoming Feeder, UniGear ZS1 12 / 17.5 kV, 4 000 A
Current
(ambient
temperature
max. 40°C)
Current
(ambient
temperature
max. 45°C)
Current
(ambient
temperature
max. 50°C)
Current
(ambient
temperature
max. 55°C)
FAN 1 FAN 2
Note
Circuit Breaker Current transformers
< 3 200 A < 3 070 A < 2 940 A < 2 800 A No No
both fans
are stopped
≥ 3 200 A ≥ 3 070 A ≥ 2 940 A ≥ 2 800 A Yes Yes
both fans
start
operation
Incoming Feeder, UniGear ZS1 24 kV, 2 500 A
Current
(ambient
temperature
max. 40°C)
Current
(ambient
temperature
max. 45°C)
Current
(ambient
temperature
max. 50°C)
Current
(ambient
temperature
max. 55°C)
FAN 1 FAN 2
Note
Circuit Breaker Current transformers
< 2 200 A < 2 110 A < 2 020 A < 1 920 A No -
fan is
stopped
≥ 2 200 A ≥ 2 110 A ≥ 2 020 A ≥ 1 920 A Yes -
fan starts
operation
Incoming Feeder, UniGear ZS1 24 kV, 3 150 A
Current
(ambient
temperature
max. 40°C)
Current
(ambient
temperature
max. 45°C)
Current
(ambient
temperature
max. 50°C)
Current
(ambient
temperature
max. 55°C)
FAN 1 FAN 2
Note
Circuit Breaker Current transformers
< 2 700 A < 2 590 A < 2 480 A < 2 360 A No -
fan is
stopped
≥ 2 700 A ≥ 2 590 A ≥ 2 480 A ≥ 2 360 A Yes -
fan starts
operation
—
4. Panel design and equipment
Figure 3: UniGear ZS1 17.5 kV, 1 250 A, 31.5 kA
1 Spindle mechanism
2 Earthing switch operating mechanism
3 Branch conductor
4 Current transformer
5 Earthing switch
6 Voltage transformer