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SUN2000-(175KTL-H0, 185KTL-INH0, 185KTL-H1) User Manual

This document describes the SUN2000-175KTL-H0,SUN2000-185KTL-INH0, and SUN2000-185KTL-H1 in terms of their installation, electrical connections, commissioning, maintenance, and troubleshooting. BOM number: 01074671, 01074684, 01074687
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Connecting the AC Output Power Cable

Connecting the AC Output Power Cable


A three-phase AC switch should be installed on the AC side of the inverter. To ensure that the 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.

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

The inverter is integrated with a comprehensive residual current detection unit to distinguish fault current from residual current. Upon detecting that the residual current exceeds the threshold, the inverter immediately disconnects from the power grid.

Cable Connection Precautions

  • The ground point on the enclosure is preferred to connect to the PE cable for the inverter.
  • The PE point in the maintenance compartment is used for connecting to the PE cable included in the multi-core AC power cable.
  • There are two ground points on the chassis shell and you only need either of them.
  • It is recommended that the PE cable of the inverter be connected to a nearby ground point. For a system with multiple inverters connected in parallel, connect the ground points of all inverters to ensure equipotential connections to ground cables.

Cable Specifications

  • If you connect a ground cable to the ground point on the chassis shell, you are advised to use a three-core (L1, L2, and L3) outdoor cable or three single-core outdoor cables.
  • If you connect a ground cable to the ground point in the maintenance compartment, you are advised to use a four-core (L1, L2, L3, and PE) outdoor cable.
  • You need to prepare the OT or DT terminal that matches the cable.
Table 5-1 AC power cable specifications

Cable Type

Conductor Cross-Sectional Area

Cable Outer Diameter

Copper-core cable

50–185 mm2

  • Multi-core cable: 24–66 mm
  • Single-core cable: 14–35 mm

Copper-clad aluminum cable and aluminum alloy cable

  • Multi-core cable: 70–185 mm2
  • Single-core cable: 70–240 mm2
Table 5-2 PE cable specifications

Conductor Cross-Sectional Area S of the AC Power Cable (Unit: mm2)

Conductor Cross-Sectional Area SP of the PE Cable (Unit: mm2)

S > 35

SP ≥ S/2

The specifications are valid only if the conductors of the PE cable and AC power cable use the same material. If the materials are different, ensure that the conductor cross-sectional area of the PE cable produces a conductance equivalent to that of the cable specified in this table.

Connecting the PE Cable

  1. Secure the PE cable using the ground screw.

    Figure 5-7 Cable connection

  2. (Optional) Apply silica gel or paint on the ground terminal to protect it against corrosion.

Connecting the AC Output Power Cable (Multi-core)

  1. Connect the AC cable to the terminal block.

    Figure 5-8 Cable connection

Connecting the AC Output Power Cable (Single-core)

  1. Connect the AC cable to the terminal block.

    Figure 5-9 Cable connection

Updated: 2019-09-21

Document ID: EDOC1100083285

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