Huawei PSB2000L User Manual

HUAWEI TECHNOLOGIES CO., LTD.

SmartPSB2000L Smart PV Safety Box

Quick Guide

Issue: 03 Part Number: 31509508

Date: 2018-05-18

Overview

• The information in this document is subject to change due to version upgrades or other reasons. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.

• Only qualified and trained electrical technicians are allowed to operate the device.

• Carefully read this document and the precautions before installing the device. Failure to comply with the

storage, installation, and operation regulations specified in this document may cause device damage, which is

not covered by Huawei's warranty.

• If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

• Use insulated tools when installing the device. For personal safety, wear proper personal protective equipment (PPE).

The SmartPSB2000L smart PV safety box (safety box for short) is a key component that implements rapid shutdown and module monitoring for Huawei SUN2000P-375W smart PV optimizers. The safety box is easy to install, operate, and maintain.

Shutdown button

NOTICE

Rapid shutdown means that the power generation system consisting of optimizers, smart PV safety boxes, and inverters decreases the DC

voltage to the safe voltage range (≤ 30 V) within the specified period

(≤ 30s).

No.

Description

Two routes of output terminals, cable length (including terminals) 250 mm

An LED indicator showing the running status of the safety box

Two routes of input terminals, cable length (including terminals) 150 mm

RS485 communication, PE, and 12 V power cables, 340 mm long

Prerequisites

An optimizer is installed for each PV module, and the rapid shutdown function of the safety box is enabled.

Trigger by button press

If the shutdown button (

) is pressed, the safety

box enters the rapid shutdown state. The LED indicator is steady red, and the inverter turns off the AC output. This product cannot be used as a substitute for the emergency stop switch.

If the shutdown button (

) is released, the safety

box exits the rapid shutdown state. The LED indicator is steady red within 10 minutes. The output voltages of the optimizer and inverter are restored 10 minutes later. The LED indicator of the safety box changes from steady red to steady green.

Trigger by power failure

If the AC power fails, the safety enters the rapid shutdown state. The inverter and optimizer stop output and communication. The LED indicators of the safety box and inverter are off.

If the AC power resumes, the inverter, optimizer, and safety box restore to the normal state.

Installation Mode 2

(Recommended Distance)

Installation and Cable Connections

Wiring Diagram

1. Each input of the safety box supports serial connection of up to 15 optimizers, and the string voltage should be less than 600 V DC.

2. After the cord end terminal is removed, the PE cable of the safety box and the communication PE cable of the power meter can be connected together to the communication terminal (pin 8) of the inverter.

NOTE

1. Install the safety box under or on a side of an inverter with the delivered M6x60 expansion bolts. It is recommended that an M8 drill bit be used to drill holes. The torque should be

4.5–5.5 N·m.

2. Connect the RS485 communications, PE, and 12 V power cables from the safety box to the corresponding port on the inverter.

3. Connect the output terminals of the safety box to the DC input ports of the inverter (one

route is used as an example in the right figure).

4. Connect the input terminals of the safety box to the output ports of the optimizer string (one route is used as an example in the right figure).

Inverter

Safety box Optimizer PV module

Installation Mode 1

(Recommended Distance)

Port Inverter Model

COM SUN2000L-3KTL-CN, SUN2000L-4KTL-CN, SUN2000L-5KTL-CN

ALARM

SUN2000L-2KTL, SUN2000L-3KTL, SUN2000L-3.68KTL, SUN2000L-4KTL, SUN2000L-

4.6KTL, SUN2000L-5KTL

Depending on the inverter model, the RS485 communications, PE, and 12 V power cables need to be connected to the COM or ALARM port of the inverter. The pins are wired in the same way.

COM or ALARM Terminal Connection

1. Switch on the AC circuit breaker between the inverter and the power grid (the AC voltage of the power grid should be in the range allowed by the inverter).

2. Turn the DC switch at the bottom of the inverter to the ON position.

3. Observe the LED indicator on the safety box. The status change sequence should be: blinking green at long intervals > blinking green at short intervals. If the LED indicator is abnormal, check whether cables are connected correctly and securely.

Powering On the Safety Box

NOTE

LED Status Description

Blinking green at long intervals

Power on self test.

Blinking green at short intervals

Communicating with the inverter properly and not communicating with the optimizer.

Steady green

Communicating with the inverter and optimizer properly.

Steady red

Shutdown.

Blinking green at long intervals: on for 1s and then off for 1s Blinking green at short intervals: on for 0.2s and then off for 0.2s

1. Check whether all cables to the safety box are properly connected.

2. Input and output terminals are correctly paired, and no crossover exists.

NOTICE

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