EXU7 Surge Protection Device (SPD)
Type 2 Surge Protection with Pluggable Modules and Remote Status
The EXU7 is a Type 2 surge protective device for 230/400V distribution boards, clamping lightning and switching transients before they reach connected equipment. Pluggable modules speed replacement after a strike, the green/red status window shows condition at a glance, and an optional remote signalling contact reports a failed cartridge back to a BMS or alarm panel.
Model
EXU7 Series — Type 2 Surge Protection DeviceEXU7-II · 1P/2P/3P/4P · 1P+N / 3P+N · Uc 275/320/385V · In 10-20kA · Imax 20-40kA
IEC 61643-11 · Class II (T2), 8/20µs · Up 1.2-1.8kV · response under 25ns · IP20
Product Information
Product Overview
Main Functions: The EXU7 Series Surge Protective Devices (SPDs) are primarily designed for single-phase and three-phase AC power distribution systems operating at 50Hz/60Hz, with rated voltages of 230V/400V.They are used to suppress transient overvoltages, discharge surge energy, and prevent or minimize damage to electrical equipment caused by transient overvoltages resulting from lightning strikes or switching operations.
Compliance with Standards :IEC 61643-11
Product Features
– High-quality chips ensure stable and reliable performance.
– Visual status indicator for easy monitoring of device status.
– Modular design for easier installation and maintenance.
– Optional remote signaling alarm accessory enables remote monitoring of SPD status.
Main Specifications
| Parameter | Specification |
| Rated Operating Voltage(Un) | 230VAC(Phase Voltage) |
| Number of Poles | 1P/2P/3P/4P/1P+N/3P+N |
| Test Classification | T2(Type 2) |
| Maximum Continuous Operating Voltage(Uc) | 275/320/385V |
| Nominal Discharge Current(In) | 10-20kA |
| Maximum Discharge Current(Imax) | 20-40kA |
| Voltage Protection Level(Up) | 1.2-1.8kV |
Technical Specifications
| Compliant Standards | IEC61643-11 | |
| Rated Voltage(Uh) | 230 VAC(phase voltage) | |
| Number of Poles | 1P,2P,3P,4P,1P+N,3P+N | |
| Model | EXU7-II | |
| Test Class | Class II(T2) | |
| Waveform(μs) | 8/20 μs | |
| Nominal Discharge Current(In) | 10kA | 20kA |
| Maximum Discharge Current(Imax) | 20kA | 40kA |
| Maximum Continuous Operating Voltage(Ue) | 275V/320V/385V | |
| Voltage Protection Level(Up)(kV) | 1.2/1.4/1.5 | 1.5/1.7/1.8 |
| Operating Status Indicator Window | Green:Normal;Red:Failed | |
| Recommended Backup Circuit Breaker | 20A | 40A |
| Recommended Backup Fuse(gL/gG) | 50A 100A | |
| Response Time | <25ns | |
| Remote Signaling Function | Configuration:12(Normally Open),13(Normally Closed) | |
| In the event of a fault,terminal 12(Normally Open)closes, and terminal 13(Normally Closed)opens. |
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| Wiring Capacity | Solid wire ≤35mm²,stranded wire 2.5-25mm²;maximum tightening torque 3.5N ·m | |
| Degree of Protection(IP Rating) | IP20 | |
Overall and Mounting Dimensions
Dimensional Drawing
Standard Wiring
Wiring Diagram for Remote Signaling Function
Compliant with standard: IEC 61643-11
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Main Specifications | |
| Remote Signaling(YX) | ||
| Parameter | Specification | |
| AC Operating Voltage/Current | 250V AC,0.5Amax | |
| DC Operating Voltage/Current | 250V DC,0.1A max 125V DC,0.2Amax 24V DC,1A max |
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| Contacts | One Normally Open(NO)Contact and One Normally Closed(NC)Contact |
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| Function | When the SPD module fails or becomes disconnected, the normally open(NO)contact closes and the normally closed(NC)contact opens. |
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| Terminal Connection Capacity | 1.5 mm²(max) |
Technical Specifications
