Low voltage protection Surge Arrester SA-0.28V/10kAis a voltage and current protector. When the current/voltage deviates from the set value, the relay automatically disconnects the power to prevent fires and safeguard electrical devices.
Metal oxide surge arresters are commonly used in the following areas:
•Residential Electrical Systems:
Protects household and small commercial wiring, appliances, and electronic devices from voltage surges caused by lightning or switching transients.
•Lighting Protection:
Installed across outdoor lighting fixtures, street lighting, and floodlights to prevent damage from lightning strikes and transient surges.
•Control Panels and Automation Systems:
Protects control devices, sensors, and automation equipment in industrial, building automation, and infrastructure projects.
•Industrial Electrical Equipment:
Provides surge protection for motors, transformers, and other critical industrial electronics.
Technical specification
Product name
Max allowable voltage, V
Voltage protection level, V
Nominal discharge current, kA
Maximum discharge current, kA
Short-circuit withstand capability, kA
SA-0.28V/10kA+WB
280
1100
10
40
4.5
Components and materials
The low voltage overvoltage surge arresteris produced by Jera Line factorylocation in China, the product included the following main parts:
Component
Description
Metal Oxide Varistor (MOV)
The heart of the arrester — absorbs surge energy by clamping voltage rapidly.
Electrode Contacts
Made from copper or nickel-coated brass, used for efficient current flow.
Enclosure (WB casing)
Weatherproof polymer housing — typically UV-resistant and flame-retardant.
Thermal Disconnect Device
Disconnects the arrester when overheated or after end-of-life surges.
Insulation Layers
Ensures dielectric strength between internal elements and external surface.
Mounting Hardware
Screws, brackets, or DIN rail clips for easy installation.
Grounding wire
transient overvoltage energy
Test
The SA-0.28V/10kA+WB surge arrester — equipped with a connecting wire for ease of installation — was designed and rigorously tested in Jera Line’s in-house laboratory. It complies with the following international and national standards:
•GB/T 10193-1997 – General requirements for low-voltage surge protective devices
•IEC 1051-1:1991 – Varistor characteristics and test methods
•IEC 61643-11:2010 Clause 8.3.4 – SPD performance evaluation under operating duty
Lab testing Overview:
Test Name
Description
Varistor DC Current Parameter Test
Measures DC leakage current and voltage clamping behavior under low-voltage conditions.
Modified Operating Duty Test
Simulates real-world overvoltage scenarios to validate energy absorption capability and thermal stability.
PRODUCT VIDEO
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