Sma SC 500CP XT Installation User Manual download pdf (Page 23)

5.3 Installing the Grounding

Figure 5: Position of grounding in the inverter (example)

Position Designation

A Grounding busbar

B Cable support rail

Terminal lug requirements:

☐ Use tin-plated terminal lugs only.

☐ For the connection, only the supplied screws, washers and nuts must be used.

☐ The terminal lugs must be designed according to the temperature. Temperature: +95°C

☐ The width of the terminal lugs must exceed the washer diameter. Washer diameter: 32mm. This will ensure that

the defined torques are effective over the whole surface.

Cable requirements:

☐ Do not attach more than one cable to each connection bracket.

☐ Use copper or aluminum cables only.

☐ Maximum cable cross-section:400mm².

Torques of the power connections:

Type of terminal lug Torque

Tin-plated aluminum terminal lug on copper bar 37Nm

Tin-plated copper terminal lug on copper bar 60Nm

Tin-plated aluminum or copper terminal lug on aluminum bar 37Nm

Additionally required mounting material (not included in the scope of delivery):

☐ Clean cloth

☐ Ethanol cleaning agent

Procedure:

1. Disassemble the panels (see Section7.2.1, page40).

2. Disassemble the protective covers (see Section7.2.2, page41).

3. Prepare the cables for connection (see Section7.3, page44).

4. Clean the tin-plated contact surfaces in the connection area with the non-woven abrasive until they have a light

metallic sheen.

5 Installation

SMA Solar Technology AG

Operating Manual 23SCCPXT-IA-E4-en-44

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Sma SC 500CP XT Installation User Manual Page 23