EV Charging Station Surge Protection
EV charging stations are widely installed in outdoor parking lots, commercial buildings, highways, residential communities and industrial parks. Charging equipment contains power electronics, communication modules, control boards and metering systems. These components are sensitive to transient overvoltage. Surge protection should be installed at the power distribution input, inside charging equipment, and on communication or monitoring lines when required.
Main/Distribution Cabinet Incoming Lines/Busbars
Secondary power protection for high-current charging loads.
AC Power SPD->Type 1 / Class l
Uc:
AC385V/420V/440V
Iimp (10/350 μs):
25kA
In (8/20 μs):
60kA
Imax(8/20 μs):
100kA
Mode of Protection:
L/N-PE; L-N, N-PEReference Standards:
IEC 61643-11OEM/ODM Acceptable
Additional Function:
Thermal Tripping Protection, Status Indicator, and Remote SignalingAC Input of Each Charging Pile Group
Protects terminal charging modules and metering/control units.
EV Charging Stations SPD->Type 2 / Class ll
Uc(V) :
AC385V
In (8/20 μs):
20kA
Imax(8/20 μs):
40kA
Mode of Protection:
LN,N-PEReference Standards:
IEC 61643-11OEM/ODM Acceptable
Additional Function:
Thermal Tripping Protection, Status Indicator, and Remote SignalingStation Control/Lighting/Auxiliary Power Cabinet
Protects auxiliary power distribution and low-power control circuits.
EV Charging Stations SPD->Type 2 / Class ll
Uc(V) :
AC385V
In (8/20 μs):
20kA
Imax(8/20 μs):
40kA
Mode of Protection:
LN,N-PEReference Standards:
IEC 61643-11OEM/ODM Acceptable
Additional Function:
Thermal Tripping Protection, Status Indicator, and Remote SignalingSurveillance Cameras/Station Control Network
Protects cameras, network switches, and station control communication systems.
AC Power SPD->Type 2 / Class ll
Uc:
AC385V/420V/440V
In (8/20 μs):
20kA
Imax(8/20 μs):
40kA
Mode of Protection:
L/N-PE; L-N, N-PEReference Standards:
IEC 61643-11OEM/ODM Acceptable
Additional Function:
Thermal Tripping Protection, Status Indicator, and Remote Signaling
Signal & Data SPD
Uc(V) :
8V
Un(V) :
5V
In (8/20 μs):
10kA
Imax(8/20 μs):
20kA
Reference Standards:
IEC 61643-21OEM/ODM Acceptable
Additional Function:
Thermal Tripping Protection, Status Indicator, and Remote SignalingSolutions
Different systems require different SPD types, voltage levels, wiring structures and installation positions. Select your application scenario to view the recommended protection strategy.FAQ
What information is needed to select SPD for EV charging stations?
You need to provide the power supply voltage and charging station layout because the charging station SPD is mainly installed in the distribution cabinet.
Can surge protection reduce EV charger failure rate?
Proper surge protection can help reduce damage caused by transient overvoltage and improve the reliability of charging equipment, especially in outdoor or lightning-prone areas.
Do EV chargers need communication line surge protection?
Yes. Many EV charging systems use Ethernet, RS485, or other communication lines for monitoring, billing, and control. These lines may also require surge protection.
What type of SPD is used for EV charging stations?
The selection depends on the charging station structure. AC Type 2 SPD is commonly used, while Type 1 or Type 1+2 SPD may be required at the main incoming side if the installation has high lightning exposure.
Where should SPD be installed in an EV charging station?
SPD is usually installed in the main distribution cabinet, charging pile input side, AC distribution panel, communication line, and monitoring system.
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