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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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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Preparing Cables

Preparing Cables

SUN2000 solar inverters support RS485 communication and MBUS communication.

The MBUS communication is applicable to medium-voltage grid connection scenarios and non-low-voltage public grid connection scenarios (industrial environment).

In the networking diagram, indicates the power cable, indicates the power flow direction, and and indicate the signal flow.

Figure 5-1 RS485 networking (SmartLogger)

(A) PV string

(B) SUN2000

(C) AC combiner box

(D) Transformer station

(E) Power grid

(F) SmartLogger

(G) Management system

     
Figure 5-2 RS485 networking (SDongle)

(A) PV string

(B) SUN2000

(C) AC combiner box

(D) Transformer station

(E) Power grid

(F) SDongle

(G) Management system

     
Figure 5-3 MBUS networking (SmartLogger)

(A) PV string

(B) SUN2000

(C) AC combiner box

(D) Transformer station

(E) Power grid

(F) SmartLogger

(G) Management system

     
Figure 5-4 MBUS networking (SDongle)

(A) PV string

(B) SUN2000

(C) AC combiner box

(D) Transformer station

(E) Power grid

(F) SDongle

(G) Management system

     
  • To ensure the system response speed, it is recommended that less than 30 solar inverters be connected to each COM port on the SmartLogger and that less than 10 solar inverters be cascaded over the SDongle.
  • The RS485 communication distance between the last solar inverter and the SmartLogger cannot exceed 1000 m.
Figure 5-5 Cable connections (configure the components in the dotted box as required)
Table 5-1 Components

No.

Component

Description

Source

A

PV string

  • PV strings consist of PV modules in series.
  • A solar inverter supports 20 PV string inputs.

Prepared by the customer

B

Environmental monitoring instrument (EMI)

  • When the SmartLogger is used, the EMI can be directly connected to the SmartLogger or connected to the last solar inverter cascaded over RS485.
  • When the SDongle is used, the EMI is a cascaded device that needs to be connected to the solar inverter where the SDongle is installed.

Prepared by the customer

C

SmartLogger

The solar inverter communicates with the management system through the SmartLogger.

Purchased from Huawei

D

Power Meter

Implements power control at the grid-tied point in low voltage scenarios using a power meter.

Prepared by the customer

E

Support tracking system

Adjusts the angle of the supports.

Prepared by the customer

F

Fuse/Circuit breaker

The tracking system should be equipped with an overcurrent protection device or component. The power cable between the device or component and the wiring terminal should be no longer than 2.5 m.

Therefore, a fuse or a circuit breaker is recommended.

  • Installed between the solar inverter and tracking control box
  • Fuse specifications: rated voltage ≥ 500 V; rated current: 16 A; protection: gG
  • Circuit breaker specifications: rated voltage ≥ 500 V; rated current: 16 A; tripping: C

Prepared by the customer

G

AC switch

  • Installed in the AC combiner box
  • Recommended: a three-phase AC circuit breaker with a rated voltage greater than or equal to 500 V AC and a rated current of 250 A

Prepared by the customer

H

SDongle

The solar inverter communicates with the management system through the SDongle.

Purchased from Huawei

The solar inverter has an RCMU inside. Its external AC switch should be a three-phase circuit breaker or other AC load circuit breakers to safely disconnect the solar inverter from the power grid.

Table 5-2 Cable description of a 3-pin model (S: cross-sectional area of the AC cable conductor; Sp: cross-sectional area of the protective earthing cable conductor)

No.

Cable

Category

Conductor Cross-Sectional Area Range

Outer Diameter

Source

1

DC input power cable

PV cable that meets the 1100 V standard

4–6 mm2

5.5–9 mm

Prepared by the customer

2

RS485 communications cable

Outdoor shielded twisted pair that meets the local standard

0.25–1 mm2

  • One or two communications cables: 4–11 mm
  • Three communications cables: 4–8 mm

Prepared by the customer

3

Protective earthing (PE) cable

Single-core outdoor copper cable and M10 OT/DT terminals

NOTICE:

You are advised to choose the ground point on the enclosure. The ground point in the maintenance compartment is used for connecting to the PE cable contained in the multi-core AC power cable.

Sp ≥ S/2

N/A

Prepared by the customer

4

Tracking system power cable

Three-core outdoor copper cable with dual-layer protection

10 mm2

15–18 mm

Prepared by the customer

5

AC output power cable (multi-core)

  • If you connect a PE cable to the ground point on the enclosure, you are advised to use a three-core (L1, L2, and L3) outdoor cable and M12 OT/DT terminals (L1, L2, and L3).
  • If you connect a PE cable to the ground point in the maintenance compartment, you are advised to use a four-core (L1, L2, L3, and PE) outdoor cable, M12 OT/DT terminals (L1, L2, and L3), and M10 OT/DT terminals (PE). You do not need to prepare a PE cable.
  • Copper cable:
    • S: 95–185 mm2
    • Sp ≥ S/2
  • Aluminum alloy cable or copper-clad aluminum cable:
    • S: 120–240 mm2
    • Sp ≥ S/2

24–66 mm

Prepared by the customer

AC output power cable (single-core)

You are advised to use a single-core outdoor cable and M12 OT/DT terminals.

  • Copper cable:
    • S: 95–185 mm2
  • Aluminum alloy cable or copper-clad aluminum cable:
    • S: 120–240 mm2

14–32 mm

Prepared by the customer

The value of Sp is 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 of the PE cable with a proper cross-sectional area produces a conductance equivalent to that of the cable specified in the table.

Table 5-3 Cable description of 4-pin models (S: cross-sectional area of the AC cable conductor; Sp: cross-sectional area of the PE cable conductor)

No.

Cable

Category

Conductor Cross-Sectional Area Range

Outer Diameter

Source

1

DC input power cable

PV cable that meets the 1100 V standard

4–6 mm2

5.5–9 mm

Prepared by the customer

2

RS485 communications cable

Outdoor shielded twisted pair that meets the local standard

0.25–1 mm2

  • One or two communications cables: 4–11 mm
  • Three communications cables: 4–8 mm

Prepared by the customer

3

PE cable

Single-core outdoor copper cable and M10 OT/DT terminals

NOTICE:

You are advised to choose the ground point on the enclosure. The ground point in the maintenance compartment is used for connecting to the PE cable contained in the multi-core AC power cable.

Sp ≥ S/2

N/A

Prepared by the customer

4

Tracking system power cable

Three-core outdoor copper cable with dual-layer protection

10 mm2

15–18 mm

Prepared by the customer

5

AC output power cable (multi-core)

  • If you connect a PE cable to the ground point on the enclosure and the neutral wire is not used, you are advised to use a three-core (L1, L2, and L3) outdoor cable and M12 OT/DT terminals (L1, L2, and L3).
  • If you connect a PE cable to the ground point in the maintenance compartment and the neutral wire is not used, you are advised to use a four-core (L1, L2, L3, and PE) outdoor cable, M12 OT/DT terminals (L1, L2, and L3), and M10 OT/DT terminals (PE).
  • If you connect a PE cable to the ground point on the enclosure and the neutral wire is used, you are advised to use a four-core (L1, L2, L3, and N) outdoor cable and M12 OT/DT terminals (L1, L2, L3, and N).
  • If you connect a PE cable to the ground point in the maintenance compartment and the neutral wire is used, you are advised to use a five-core (L1, L2, L3, N, and PE) outdoor cable, M12 OT/DT terminals (L1, L2, L3, and N), and M10 OT/DT terminals (PE).
  • Copper cable:
    • S: 95–185 mm2
    • Sp ≥ S/2
  • Aluminum alloy cable or copper-clad aluminum cable:
    • S: 120–240 mm2
    • Sp ≥ S/2

24–66 mm

Prepared by the customer

AC output power cable (single-core)

You are advised to use a single-core outdoor cable and M12 OT/DT terminals.

  • Copper cable:
    • S: 95–185 mm2
  • Aluminum alloy cable or copper-clad aluminum cable:
    • S: 120–240 mm2

14–32 mm

Prepared by the customer

The value of Sp is 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 of the PE cable with a proper cross-sectional area produces a conductance equivalent to that of the cable specified in the table.

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Updated: 2019-12-25

Document ID: EDOC1100087908

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