3.2 General diagram
3
2
1
4
5
6
7
Fig 1:
General diagram of the BALTO System.
Item
Description
Item
Description
1
Mains Supply: 230 VAC / 50 Hz or
120 VAC / 60 Hz
5
Control Unit
2
Battery charger(s)
6
DC Current Generator(s) of 4,000 A each
3
Ultracapacitor(s) as buffer for the
batteries -
7
Device under test - High-speed DC
Circuit Breaker
4
Batteries
When fully charged, the voltage over the batteries will be approximately 15.6 VDC. When performing an injection,
the output voltage of the Current Generator(s) will not exceed 4.7 VDC.
3.3 Testing modes
Current Injections can be generated in different modes, such as:
Quicktest Mode : high slope during injection
Auto Mode : slope of 200 A/s
Manual Mode
Protection relay mode : steep slope (higher than short circuit slope)
Shunt mode : fixed current during maximum 60 seconds.
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8
Principles of operation
