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SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

This document describes the SUN2000-125KTL-M0,SUN2000-110KTL-M0,SUN2000-100KTL-M0,SUN2000-100KTL-M1 and SUN2000-100KTL-INM0 in terms of its installation, electrical connections, commissioning, maintenance, and troubleshooting. BOM number: 01074693, 01074694, 01074695, 01074695-001 and 01074695-002.

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Connecting an AC Output Power Cable

Connecting an AC Output Power Cable

Prerequisites

  • A three-phase AC switch should be installed on the AC side of the solar inverter. To ensure that the solar inverter can safely disconnect itself from the power grid when an exception occurs, select a proper overcurrent protection device in compliance with local power distribution regulations.
  • Connect the AC output power cable according to the requirements specified by local power grid operators.
  • Connect the power cable of the tracking system before the AC output power cable. Otherwise, reworking will be caused.
    Figure 5-12 Cable connection sequence

    (1) Power cable of the tracking system

    (2) AC output power cable

Do not connect loads between the solar inverter and the AC switch.

Requirements for the OT/DT Terminal

  • If a copper cable is used, use copper wiring terminals.
  • If a copper-clad aluminum cable is used, use copper wiring terminals.
  • If an aluminum alloy cable is used, use copper-aluminum transition wiring terminals, or aluminum wiring terminals along with copper-aluminum transition spacers.
  • Do not connect aluminum wiring terminals to the AC terminal block. Otherwise the electrochemical corrosion will occur and affect the reliability of cable connections.
  • Comply with the IEC61238-1 requirements when using copper-aluminum transition wiring terminals, or aluminum wiring terminals along with copper-aluminum transition spacers.
  • If copper-aluminum transition spacers are used, pay attention to the front and rear sides. Ensure that the aluminum sides of spacers are in contact with aluminum wiring terminals, and copper sides of spacers are in contact with the AC terminal block.
Figure 5-13 Requirements for the OT/DT terminal
Figure 5-14 AC terminal block dimensions of a 3-pin model
Figure 5-15 AC terminal block dimensions of 4-pin models

This section describes how to install an AC output power cable for the 3-pin model.

Procedure

  1. Prepare a cable.
  2. Remove rubber rings according to the cable diameter range.
  3. Secure the AC output power cable and PE cable.
  4. Install the support bar.
  5. Close the maintenance compartment door and tighten the two screws on the door.

    • Sufficient slack should be provided in the PE cable to ensure that the last cable bearing the force is the PE cable when the AC output power cable bears pulling force due to force majeure.
    • The cable outer diameter can be measured using the ruler sticker in the maintenance compartment.
    • Ensure that the cable jacket is in the maintenance compartment.
    • Ensure that the AC output power cable is secured. Failing to do so may cause the solar inverter to malfunction or damage to its terminal block by issues such as overheating.
    • Before closing the maintenance compartment door, check that the cables are connected correctly and securely, and clean up the foreign matter from the maintenance compartment.
    • If a screw on the maintenance compartment door is lost, obtain the spare screw from the fitting bag tied at the bottom of the maintenance compartment.
    Figure 5-16 Multi-core cable connections
    Figure 5-17 Single-core cable connections
    Figure 5-18 3-pin model (125KTL) cable connections

    (A) Four-core cable

    (B) Three-core cable

    (C) Single-core cable

    Figure 5-19 4-pin model (100KTL/110KTL) cable connections

    (A) Five-core cable

    (B) Four-core cable (including the PE cable)

    (C) Four-core cable (including the neutral wire)

    (D) Three-core cable

    (E) Single-core cable (including the neutral wire)

    (F) Single-core cable (excluding the neutral wire)

    The cable colors shown in figures are for reference only. Select an appropriate cable according to the local standards.

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Updated: 2019-12-25

Document ID: EDOC1100087908

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