Socomec Pre-PO Engineering Review Requirements
Introduction
Socomec has various requirements that must be met before accepting a PO and providing a delivery date for their systems. The timeline for the engineering review process is dependent on the amount of updates required to the SLD as well as response times from the customer. By following this guide, the engineering review time frame will be shortened as much as possible by having all necessary components and callouts listed in the preliminary drawings. The requirements are laid out in this article in five separate sections and will go into more detail in each one:
- Intake Form
- Single Line Diagram - Required Clearances
- Single Line Diagram - Foundation Requirements
- Single Line Diagram - Additional Callouts
- Islanding Considerations (if applicable)
Important Note - Project Location Proximity to the Sea:
- HES L - required to be 2km or greater from the sea to maintain CATL battery warranty
- HES L+ - required to be 500m or greater from the sea to maintain CATL battery warranty
1.0 Intake Form
The standard intake form is attached at the bottom of this article. Below are explanations for fields that may need background knowledge to answer.
Desired Delivery Date (if delivery cannot be accepted by customer on agreed upon delivery date, Socomec charges $1,500/week for storage):
- HES L (186kWh) - after delivery but prior to installation, HES L systems require a voltage check every three months (must be performed by Socomec Technicians) to main warranty validity
- HES L+ (204kWh) - after delivery but prior to installation, HES L+ systems require a voltage check every six months to maintain warranty validity
Human Machine Interface (HMI):
- Socomec offers the option to include a screen on the Control Cabinet (C-Cab) for ease of data retrieval and troubleshooting. This screen is an extra charge and up to the customer if they want to include this in their system.
Utility / Grid Code Requested:
- If the project is located in California, Socomec only requires the name of the Utility Provider at the project location
- If the project is located outside of California, a utility / grid code will need to be provided to Socomec - please see image below
Image 1 - Explanation of Utility Codes
2.0 Single Line Diagram - Required Clearances
These clearances are required (as applicable) to be shown in the SLD prior to PO acceptance from Socomec.
Image 2 - Clearance Distances
* 500mm / 20in is the minimum of space needed to operate. In case of removable back fence this fence can be installed at 100mm / 4in, enough for the ventilation, and once removed, Socomec should have again the requested space to operate.
** To enable the installation of the cable gutter please leave 100mm +/-6mm (3.94in +/-0.24in)
*** To enable the installation of the cable gutter please leave 50.8mm +/-6mm (3.94in +/-0.24in)
**** 700mm / 27.6in is the minimum of space needed to operate. In case of removable back fence this fence can be installed at 500mm / 20in, enough for the ventilation, and once removed, Socomec should have again the requested space to operate.
A minimum clearance distance of 65 cm / 25.6 in must be maintained above the SUNSYS HES L+ B-CAB. This space is essential to ensure the proper functioning of the deflagration panel located on top of the battery cabinets, allowing for safe and effective operation.
3.0 Single Line Diagram - Foundation Requirements
The foundation must be designed to meet the following minimum requirements, and be called out in the Single Line Diagram:
- 152mm (6in) deep – for SDS 0.8g
- 254mm (10in) deep – for SDS 1.6g;
- 254mm (10in) deep – for SDS 2.5g;
- 508mm (20in) around the equipment
Since the cabinet can be installed in different locations with varying seismic considerations, three values of SDS (spectral response acceleration parameter at short periods - 0.2 seconds) are considered:
- High-level design short period spectral acceleration: SDS = 2.5g
- Mid-level design short period spectral acceleration: SDS = 1.6g
- Low-level design short period spectral acceleration: SDS = 0.8g
Image 3 - Concrete Depth for SDS 2.5g
Image 4 - Concrete Space around Equipment
4.0 Single Line Diagram - Additional Callouts
In addition to the required callouts above, there are a few more that need to be included in the drawings for HES L and HES L+ systems. Please reference the install manual for the HES XXL systems.
- Service entrance voltage and amperage
- PV considerations
- Where will the PV interconnect?
- What size is the PV?
- CT measuring point for the PV (must be aggregated to qualify for PCS CRD functionality)
- BESS considerations
- Where will the BESS interconnect? Cannot connect to same switchgear as PV to qualify for PCS CRD functionality.
- Utility CT measuring point
- Auxiliary loads for B-Cab(s) with appropriately sized breaker (based on the number of B-Cabs)
- Refer to specifications in back of installation manual for exact auxiliary power consumption
5.0 Islanding Considerations (if applicable)
If your project is not going to have Microgrid capability, you can skip this section. Below are the minimum requirements to be shown on the SLD for an Islanding project.
- SEL-751 called out with appropriate part number
- AC PV output cannot exceed 1.5x C-Cab AC capacity in kW
- Low voltage connections (must be shown on SLD prior to battery delivery)
- I/O pin callouts for PMS Extension
- CRE card (if applicable)
- SEL relay
- All motorized breakers