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Table of Contents
Summary of Contents for Sav S1-A-STS Series
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Page 2: Table Of Contents
Contents 1. Preface ........................2 1.1 Applicable Products ..................2 1.2 Intended Personnel ...................2 1.3 Definition of Symbols ..................2 2. Safety Precautions ....................3 2.1 General Safety ....................3 2.2 Equipment Safety .....................3 2.3 Personnel Requirements .................. 4 3. Product Introduction ....................5 3.1 Product Overview .................... 5 3.2 External Description .................. -
Page 3: Preface
1.1 Applicable Products This document applies to the Static Transfer Switch, referred to as STS model: S1-A-STS series. 1.2 Intended Personnel Only qualified professionals who are familiar with local regulations and electrical systems, have undergone professional training, and are knowledgeable about this product should use it. -
Page 4: Safety Precautions
2. Safety Precautions The safety precautions in this document must be followed at all times when operating the equipment. ⚠ Warning The equipment has been designed and tested in compliance with safety regulations, but improper operation may result in serious injury or property damage. Always follow the safety instructions before operating the equipment. -
Page 5: Personnel Requirements
2.3 Personnel Requirements Note · Personnel responsible for installing and maintaining the equipment must undergo strict training, understand all safety precautions, and master the correct operation methods. · Only qualified professionals or trained personnel are allowed to install, operate, maintain, or replace the equipment or its components. -
Page 6: Product Introduction
3. Product Introduction 3.1 Product Overview Function Overview The static transfer switch is an automatic switching system that selects one of two power sources. It transfers the power supply between two independent AC sources. When one source fails, the STS automatically switches to the other source to supply power to the load. -
Page 7: External Description
3.2 External Description Figure 3.2 STS Appearance Diagram 3.2.1 Cabinet Figure 3.3 Front and Rear View of the Static Transfer Switch with Doors Open Position Description Surge Protector Miniature Circuit Breaker... -
Page 8: Logical Block Diagram
Molded Case Circuit Breaker STS Module (available in 200kW and 500kW options) 5/6/7 Molded Case Circuit Breakers Molded Case Circuit Breakers 9/10/11 Miniature Circuit Breakers 3.2.2 STS Module Figure 3.4 STS Module Dimension Diagram 3.3 Logical Block Diagram The STS static transfer switch is placed between the grid and the battery system, ensuring that the system can quickly disconnect the grid from the energy storage system when the grid power is lost. -
Page 9: Equipment Parameters
Figure 3.5 Logical Block Diagram of the Static Transfer Switch (1) Passive Switching ① Typical Switching: The sampling board continuously samples grid-side data and sends it to the control board. When a voltage drop is detected, the control board analyzes for half a cycle to confirm a grid outage. At this point, the fast switch disconnects and simultaneously issues an off-grid switching signal to the energy storage cabinet. - Page 10 Power Parameters Grid Port Power (kW) Max Grid Port Current Load Port Power (kW) Max Critical Load Power (kW) Note: The sum of the critical load power and PCS-side power must be ≤ the product's maximum power. Rated Voltage (Vac) Grid Voltage Range...
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Page 11: Equipment Inspection And Storage
4. Equipment Inspection and Storage 4.1 Pre-Signature Inspection Before signing for the product, please check the following: 1. Check if the outer packaging is damaged, such as deformation, holes, cracks, or any other signs that may indicate damage to the equipment inside. If there is damage, do not open the packaging and promptly contact the carrier or our company. -
Page 12: Installation Requirements
5. Installation Requirements 5.1 Environmental Requirements Note · Site Requirements: The equipment protection level is suitable for both indoor and outdoor installations. For outdoor installations, the site must not be in a low-lying area prone to flooding. The installation surface should be higher than the region's historical maximum water level, and the location should be away from flammable, explosive materials, and corrosive substances. -
Page 13: Wiring Instructions
6. Wiring Instructions 6.1 Safety Precautions ⚠ Danger All operations during the electrical connection process, as well as the specifications of cables and components used, must comply with local laws and regulations. Before any electrical connections, please disconnect all switches of the STS Cabinet to ... -
Page 14: Sts Cabinet Strong Current Wiring
Figure 6.1 STS Cabinet Schematic Diagram 6.3 STS Cabinet Strong Current Wiring The input of the main power grid is connected to the following wiring positions:： Figure 6.2 STS Cabinet Top and Bottom Copper Busbar Position Description Quantity A-phase to grid-side A-phase... - Page 15 B-phase to grid-side B-phase C-phase to grid-side C-phase N-phase to grid-side N-phase PE to grid-side PE Below is the S1-A-STS500-3 example to illustrate the wiring method for the battery system and loads, with three energy storage cabinets connected on the left side and critical loads connected on the right side：...
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Page 16: Sts Cabinet Communication Wiring
A-phase to 3# ES Cabinet A-phase B-phase to 3#ES Cabinet B-phase C-phase to 3#ES Cabinet C-phase N-phase to 3#ES Cabinet N-phase A-phase to Load A-phase B-phase to Load B-phase C-phase to Load C-phase N-phase to Load N-phase 6.4 STS Cabinet Communication Wiring The STS Cabinet is equipped with CAN and RS485 communication ports, enabling communication with the PCS and allowing the upload of operational status and fault information to the EMS. - Page 17 Below is the communication wiring between STS Cabinet and the EMS of the battery system: Figure 6.5 STS-EMS Communication Wiring Schematic Diagram Because multiple battery systems are connected in parallel, the batteries in individual battery system also need to be connected in parallel. The parallel connection method is as follows: Figure 6.6 PCS-PCS Communication Wiring Schematic Diagram...
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Page 18: Sts Cabinet Power Distribution Wiring
6.5 STS Cabinet Power Distribution Wiring The STS Cabinet needs to be connected to a 24Vdc power to supply power to the system. The power supply access position is shown in the following figure.： Figure 6.7 STS Cabinet-ES Cabinet Power Distribution Wiring Schematic Diagram... -
Page 19: Equipment Running Trial
7. Equipment Running Trial The STS cabinet is applied in the scenario of on-grid and off-grid switching in energy storage systems, and its startup and operation require coordination with our PCS and EMS. 7.1 Pre-Power-On Inspection Before powering on, please carefully check the following items to guarantee their accuracy. -
Page 20: Equipment Shutdown
7.3 Equipment Shutdown There are two shutdown methods： (1) Directly disconnect the switch between the STS Cabinet and the grid. This method is the complete shutdown mode, meaning that after shutdown, the system will be without power, allowing for related maintenance to be carried out on the system. -
Page 21: System Maintenance
If the problem cannot be solved or if there are still doubts even with the help of the user manual, please contact SAV Digital Energy. When consulting, it is recommended to provide the following information simultaneously: 1. - Page 22 Inspect the following items, and if they do not meet the requirements, please take immediate corrective actions: 1. Check if the cabinet and internal equipment are damaged or deformed. 2. Check if there are any abnormal noises during the operation of the internal equipment. System Status and Once every 3.
- Page 23 7. Verify if the grounding connections are correct. 1. Simulate power outage. Once every six 2. Check the warning signs on the machine body Safety Function months or one and other equipment signs. If any blurring or damage, year replace them in time. 1.
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