BST-GFL31 User Manual
15
Future signals will be compared against the reference point. For example, at the start of the circuit,
referred to Point A in the following diagram, its current value of 20mA is set as 100%. Down the circuit,
at Point C, its current value of 10mA will become 50%.
Fig 2.5.2.4
Reference Point setting for the first time
IMPORTANT
: Please do the reference setting only AFTER signal generator is connected with the DC
circuit and injects signal properly (in the last screen like Fig 2.5).
Take Fig 2.5.2.5 for example, after signal injection, the signal at the beginning (close to red socket on
signal generator) of red testing lead is strongest. If in Fig 2.5.2.6, beginning of black testing lead will
have strongest signal. In the explanation below, we will use the first situation as example (Fig 2.5.2.5).
1)
When positive busbar has fault:
Fig 2.5.2.5
2)
When negative busbar has fault:
Fig 2.5.2.6
For the first reference setting, please clamp only ONE of the two current detectors around beginning
Summary of Contents for BST-GFL31
Page 6: ......
