Deif PPM 300 - Page 215

Splitting a section example
If the Power management rules # > Number of gensets connected > Maximum is 2 before the split, then PMS will ensure
that there are no more than 2 gensets connected to each section during the split.
Power management rules when joining two sections
The PMS uses the least restrictive section's power management rules when joining two sections. The PMS does not try to anticipate
what the power management rules will be after sections are joined.
Joining a section example
Section 1 uses Power management rules 7, and Section 2 uses Power management rules 8. Power management rules 7 >
Number of gensets connected > Maximum is 2 and Power management rules 8 > Number of gensets connected >
Maximum is 3. There must therefore be a maximum of 3 gensets connected in total before the join.
Section power management rules example
Figure 7.5
Single-line diagram for the example
G
G
G
G
A C D
E
B
CustomLogic is configured as follows:
• When bus tie breaker E is closed, CustomLogic assigns Power management rules 1 to controller A.
◦ Since they are in the same section, the PMS applies Power management rules 1 to controllers B, C and D too.
• When bus tie breaker E is open, CustomLogic assigns Power management rules 2 to controller A.
◦ Since it is in the same section, the PMS applies Power management rules 2 to controller B too.
• When bus tie breaker E is open, CustomLogic assigns Power management rules 3 to controller C.
◦ Since it is in the same section, the PMS applies Power management rules 3 to controller D too.
Based on this configuration, when bus tie breaker E is closed:
• All controllers (A to E) use Power management rules 1.
Figure 7.6
Split busbar operation for the example
G
G
G
G
A C D
E
B
Busbar A Busbar B
When bus tie breaker E is open:
• GENSET controllers A and B and BUS TIE breaker controller E use Power management rules 2.
DESIGNER'S HANDBOOK 4189340911K UK Page 215 of 521