Type 6 (Closed) Pre-Charge - Siemens SINAMICS PERFECT HARMONY GH180 Function Manual

Setting Parameters for Type 5 Pre-charge
Use the following parameter settings to operate type 5 pre-charge. Refer to Cell Menu (2520) in
Section Options for Drive Menu (2) of Chapter Parameter Assignment / Addressing for
parameters associated with this function.
• For normal operation:
– Pre-charge Enable (2635) to "Type 5 Open".
– Use type 5 pre-charge for any cell type, but cell voltages (2550) "750V AP" and "750V AP
• For maintenance or service operation:
– Pre-charge Service Mode (2637). This parameter completes pre-charge with M4 closed.
– Pre-charge Service Start (2638). This parameter starts the service mode of pre-charge
See also
Pre-charge using Dedicated I/O (Page 269)
8.19.7

Type 6 (Closed) Pre-charge

Type 6 pre-charge is used primarily for water-cooled SINAMICS Perfect Harmony™ drives but can
be used with any drive. It uses four contactors M1, M2, M3, and M4. It is designed so that M4 will
not open until M1 closes. This designates type 6 pre-charge as a make-before-break, or closed
pre-charge type.
This make-before-break operation makes this pre-charge type ideal for limiting transformer in-
rush current, and so may be used with cells that do not require pre-charging. Type 6 pre-charge
can be implemented only on the 'new' I/O board using the digital I/O Breakout board.
Type 6 pre-charge can be implemented only with the user I/O board due to the dedicated I/O
controlled directly through the NXGpro code.
Note
Pre-charge fault correction
On any pre-charge fault, you must examine the event log for the cause, and correct the problem
before proceeding to another attempt.
NXGPro+ Control Manual
Operating Manual, A5E50491925A
4Q" must use either type 5 or type 6 pre-charge. These are the two settings that are
defined for the water-cooled 6SR325 drive.
M1 never closes. Use for troubleshooting purposes only.
from the menu instead of through an SOP flag.
NOTICE
Changing drive parameter settings
Do not change drive parameter settings.
Only Siemens trained personnel are authorized to change drive parameter settings.
Advanced Operating Functions
8.19 Pre-charge using Dedicated I/O
309