How to determine grounding configuration for capacitor bank.

Dear Mr. Wfg42438
Q1."...I wanted to ask is... manufacturer data sheets mention the Var delivered but not the grounding configuration applied to deliver the rated value".
A1. The basic data are the [VA and voltage] ratings. The bank internal connection whether is in Y or D is NOT important to the user. For LV Y connected banks, the [neutral point] shall NOT be directly earthed. However, indirectly earthing via surge arresters is permissible.
Q2. "...Does anyone know if the rating provided is typically specified to the end-user upon request?"
A2. No. the end-user would have to choose a VA rating that is within the manufacturer's "standard" bank range. The manufacturer can but would be too costly to assemble a special bank to your VA and voltage ratings.
Q3. "... are these banks designed based on the end-users grounding configuration needs? "
A3. No. See A1. Even internally is in Y formation, the neutral point is NOT brought out, i.e. the end-user is NOT accessible to the neutral point, internally.
Q4."... with a specific kVar rating does that mean the design is adjusted by the manufacturer based on the customer's required grounding configuration or has this configuration been predefined by the manufacturer to deliver the rated kVar? "
A4. The end-user selects a kVAr bank from the manufacturer's pre-defined configuration "standard" bank range. The end-user is NOT involved on the earthing [of the (internal) neutral point], which SHALL be [isolated] from the earth, see A1. Attention: The (metallic tank) SHALL be [earthed].
Che Kuan Yau (Singapore)