MOSO SF8KTL Solar Inverter Instruction Manual

: June 6, 2024
: MOSO

MOSO SF8KTL Solar Inverter Instruction Manual

INTRODUCTION

How to use this manual

In order to better use this manual, please understand the information of product model, Intended audience and symbol conventions that it oriented and other information.

Validity

This manual describes the assembly, installation, commissioning and maintenance of the following inverters:

SF6KTL
SF7KTL
SF8KTL

Target Group

This manual is for qualified personnel. Qualified personnel have received training and have demonstrated skills and knowledge in the construction and operation of this device. Qualified Personnel are trained to deal with the dangers and hazards involved in installing electric devices.

SAFETY

Please read safety precautions in this manual carefully, if ignored, could result in serious injury or death.

Safety Instructions

When using the product, please do remember the below information to avoid the fire, lightning or other personal injury:
Ensure that input DC voltage is less than Max. DC input voltage.
Over voltage may cause permanent damage to inverter or other losses, which will not be include in warranty!
This chapter contains important safety and operating instructions.
Read and keep this operation guide for future reference.
Authorized service personnel must disconnect both AC and DC power from the SF series inverter before attempting any maintenance or cleaning or working on any circuits connected to the SF series inverter.

Glossary Symbol

This section gives a glossary of all the symbols shown on the inverter and the type label.

Table 2-1 Symbols on the inverter

Table 2-1 Symbols on the inverter

PRODUCT INTRODUCTION

Overview

SF8TL series

SF8TL series Overview

Type Label

The type labels provide a unique identification of the inverter (The type of product, Device-specific characteristics, Certificates and approvals). The type labels are on the right-hand side of the enclosure.

INSTALLATION

Installation Process

Installation Process of SF series，as shown in Figure 4-1.

Figure 4-1 Installation Flow chart

Figure 4-1 Installation Flow chart

Pre-installation check

Table 4-1 Deliverables description

Choose an installation location

The installation method and mounting location must be suitable for the weight and dimensions of the inverter. Select a wall or solid vertical surface which is able to support the PV inverter.

Mount on a solid surface, the mounting location must be accessible at all times.

Vertical installation or tilted backwards by max. 15°.

The connection area must point downwards.

Do not install horizontally.

To ensure good heat dissipation and reserve enough space for installing the SF series, the SF series is at least 30cm, 50cm,100cm, and 50cm away from objects on its both sides, top, bottom, and front respectively, as shown in Figure 4-3.

Figure 4-3 Minimum installation clearance

NOTICE

When installing multiple SF series Inverters in high temperature areas, please increase the space properly as needed to make sure that there is enough space for heat dissipation.

Installing the SF series

NOTE

If the installation locations near the ground ,first connect the PGND cable to the ground before installing the Inverter on the wall.

Step 1 Install the bracket

1. Determine the position for drilling holes, level hole positions, and then mark the hole positions by using a marker, asshowninFigure 4-4

Figure 4-4 Hole positionsanddimensions (Unit: mm)

2. Align the bracket with hole positions, insert expansion bolts into the holes, and tighten the expansion bolts to a torque of 30N.m using a torque wrench, as shown in Figure 4-5.

Figure 4-5 Securing a bracket

The hole in the wall
Plastic screw socket
Tapping screw

Step 2 Install the SF series

1. Use one hand to hold the handle at the bottom of the SF series and use the other hand to hold the handle close to the top of the SF series and then stand the SF series. Two peoples are required to install the SF series.

1.Mount the SF series on the bracket and keep them aligned with each other, as shown in Figure 4-6.

Figure 4-6 Mounting the SF series on the bracket (left view)

ELECTRICAL CONNECTION

Electrical connection process

Electrical connection process of SF series as shown in Figure 5-1.

Figure 5-1 Electrical connection flowchart

Figure 5-1

Connecting PGND Cables（PE）

Good grounding for the SF series can help resist the impact of the surge voltage and improve the EMI performance. First connect the PGND cable before connecting the AC power cable, DC power cable, and communication cable.

For the system with one SF series, connect the PGND cable to the ground. For the system with multiple SF series ,connect thePGND cables of all SF series to a ground bar.

If the installation location is near the ground ,first connect the PGND cable to the ground before installing the SF series on the wall.

Step 1 Remove the insulation layer with an appropriate length using a wire stripper. Insert the exposed core wires intotheOTterminal and crimp them by using a crimping tool, as shown in Figure 5-2.

Figure 5-2 Preparing a ground cable

NOTICE

Step 2 Install the crimped OT terminal, flat washer, and spring washer on the M6 welded stud, and tighten the nut to a torque of 5 N.m using a socket wrench.

To enhance the anti-corrosion performance of the ground terminals, apply silica gel on the mafter connecting the ground cable.

Connecting AC Output Power Cables

Figure 5-3 AC connector diagram

Adapter
Sleeve
Cable Gland
AC output connector

Step 1 Remove the cable gland and the adapter from the AC output connector.

Step 2 Remove the insulation layer of the AC output cable of an appropriate length using a wire stripper.

Strip the outer jacket of AC output cable by 55mm.
Cut the core wires of the cables excluding the PGND cable by 2.5mm. That is, the core wire of the PGND cable should be 2.5mm longer than that of other four cables.
Strip the insulation layer of each core wires by 12mm.

Figure 5-4 Connecting an AC output power cable (1) (unit: mm)

Step 3 Insert AC output cable (L, N, PE) into the cable gland and the adapter, as shown in Figure 5-6.

Figure 5-5 Connecting an AC output power cable (2)

Step 4 Loosen the screws inside the coupling nut holes using a screwdriver, insert the core wires into corresponding holes, and tighten the screws, as shown in Figure 5-6.

Tighten the screws to a torque of 0.7 N.m.

Figure 5-6 Connecting an AC output power cable (3)

Figure 5-6

Connect L to the hole L. Connect N to the hole N. Connect PE to the hole PE .

Step 5 Check that all core wires are properly connected.

Step 6 Secure the adapter to the coupling nut. Tighten the adapter to a torque of 1~2 N.m.

Step 7 Secure the cable gland to the adapter, as shown in Figure 5-8.Tighten the cable gland to a torque of 5 N.m (You need to use some tool to achieve this torque).

Figure 5-7 Connecting an AC output power cable (4)

Step 8 Connect the AC output connector to the bayonet coupling of the AC output wiring terminal on the SF series and rotate it clockwise until you hear a “click” sound.

Because no sufficient space is available on the right of the AC terminal, tighten the terminal using the left hand.

Connecting DC Input Power Cables

Before connecting the DC input cable, please make sure that the Inverter “DC SWITCH” in the “OFF” status, otherwise, the high voltage can bring about life threatening.

Table 5-2 Recommended DC input cable specifications

Table 5-2

DC input connector include positive connector and negative connector, as shown in figure 5-8.

Figure 5-8

Figure 5-8 Positive connector and Negative connector

Step 1 Remove cable glands from the positive and negative connectors. Then ,Remove the insulation layer with an appropriate length from the positive and negative power cables by using a wire stripper as show in Figure 5-9.

Figure 5-9 Connecting DC input power cables (1)

Figure 5-9

Positive power cable
Negative power cable

Step 2 Insert the positive and negative power cables into corresponding cable glands.

Step 3 Insert the stripped positive and negative power cables into the positive and negative metal terminals respectively and crimp them using a clamping tool. Ensure that the cables are crimped until they cannot be pulled out by force less than 400N, as shown in Figure 5-10.

Figure 5-10 Connecting DC input power cables (2)

Positive power cable
Negative power cable

Step 4 Insert crimped power cables into corresponding housings until you hear a “click” sound. The power cables snap into place.

Step 5 Reinstall cable glands on positive and negative connectors and rotate them against the insulation covers. Before performing step 6 , the DC switch is OFF.

Step 6 Insert the positive and negative connectors into corresponding DC input terminals of the SF series until you hear a”click”sound, as shown in Figure 5-11.

Figure 5-11 Connecting DC input power cables (3)