RESOURCES
Cresin supports overseas customers with SPD product supply, technical documents, OEM cooperation and application-based product selection.
01 Product Catalog
02 DataSheet
03 SPD Selection Guide
04 Wiring Diagrams
Product Catalog
Browse the main product categories before downloading the full catalog.
Power Supply
AC Power SPD
For low-voltage AC distribution systems, main panels and sub-panels.
Type 1 / Type 2
Common Uc: AC385V/420V/440V
IEC 61643-11 Reference
New Energy Photovoltaic
Solar PV SPD
Effectively resist surge voltages, reducing equipment failures and downtime losses.
Type 2
AC & DC Power Protection
AC Power Protection
New Energy Wind Power
Wind Power SPD
If Uc is lower than the actual operating voltage, the SPD may age quickly or fail.
Type 1 / Type 2
Common Uc: AC760V/1500V
AC Power Protection
New Energy Charging Stations
EV Charging Station SPD
Resistant to outdoor high and low temperatures and water resistance.
AC Power Protection
Common Uc: AC385V
Poles/Configuration: 1P+N / 3P+N
Analog Signal Network
Signal & Data SPD
RS485, PoE and telecom lines can also be damaged by transient surges.
CSRS-485
CSMS-RJ45
CSMS-TEL12/24/48
SPD Backup Protector
Surge Circuit Breaker
Ensure that the surge protection remains effective and that the SPD does not catch fire.
Type 1 / Type 2
Type 1 / Type 2
Common Ue: AC220V/380V
Installation Guide
It is recommended to connect a fuse or an surge circuit breaker in series at the front end of the lightning protection module.
L1, L2, L3 are Live wires, N is the Neutral wire, and PE is the Protective Earth wire.
During installation, the power supply must be cut off. Do not operate with power on.
The connecting wires must meet the requirements, and the wiring should be as short as possible.
Lightning grounding should comply with the requirements of lightning protection specifications.
View Details
SPD Selection Guide
Testing and verification help confirm whether the SPD product matches the application requirement and basic performance requirements.
Voltage and electrical performance check
Insulation and leakage current inspection
Remote signaling function check if applicable
Appearance, marking and wiring review
View DetailsBLOG
Surge Protector SPD Industry Knowledge, Selection Scheme, Case Analysis.
FAQ
What information is needed for automation SPD selection?
You need to provide power voltage, signal type, communication protocol, cable length, installation environment, grounding condition, and protected equipment type.
Where should SPD be installed in industrial control systems?
SPD should be installed at power input points, cabinet cable entry points, communication interfaces, sensor line entrances, and near sensitive control equipment.
What type of SPD is used for RS485 communication?
RS485 systems require signal SPD designed for low-voltage communication lines. The SPD should match the working voltage, number of wires, transmission speed, and communication structure.
Can surge protection protect PLC systems?
Yes. Properly selected SPD can help protect PLC power supplies, communication modules, I/O modules, and connected field devices from surge damage.
What parts of an automation system need SPD?
SPD may be needed for AC power supply lines, DC power circuits, PLC input/output lines, RS485 communication lines, sensor lines, Ethernet networks, and control cabinets.
Why do industrial automation systems need surge protection?
Industrial automation systems include PLCs, sensors, control cabinets, communication networks, and power supplies. These components are sensitive to transient overvoltage caused by switching operations, lightning-induced surges, and electrical interference.
Can CRESIN provide SPD for PoE security systems?
Yes. CRESIN can provide Ethernet and PoE surge protective devices for IP cameras, network switches, and security monitoring systems.
Where should CCTV SPD be installed?
SPD should be installed near outdoor cameras, at cable entry points, near network switches, and close to protected monitoring equipment when necessary. When choosing CCTV SPD, both power and signal lightning protection must be taken into consideration simultaneously.
Do analog CCTV systems need different SPD?
Yes. Analog CCTV systems may require video signal SPD, power SPD, or control line SPD depending on the wiring structure.
What type of SPD is used for IP cameras?
IP cameras usually require Ethernet SPD, especially when installed outdoors or connected through long network cables. If PoE is used, the SPD should support PoE transmission.
Testing Laboratory
Our laboratory is equipped with complete SPD lightning surge test equipment complying with IEC 61643. Raw component inspection, finished product aging and durability testing ensure stable quality for AC/DC SPD, PV SPDand EV charger SPD.
Certifications
Our SPD have passed comprehensive type tests and hold type test reports as well as corresponding model certificates. The electrical parameters are based on reliable data and comply with surge protection engineering specifications.
IEC Standards
Our SPD products are researched and developed strictly in accordance with IEC 61643 international standards. Circuit design, component selection and electrical performance are fully aligned with standard specifications.
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Address: No. 978 Tianchen Road, High-tech Zone, Jinan, Shandong,China
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The product range includes production technologies for smart capacitors, digital display meters, surge protectors, dedicated backup protection devices for surge protectors, self-resetting over/under-voltage protectors, control and protection switches, and automatic transfer switches for dual power supplies.
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