Fortress Circuit Protection
Type 2 Single Phase Surge Arrester
Part NO.: CUSPDT21/B
Fully Compliant to BSEN61643, BSEN62305 and the latest requirements of the 18th Edition Wiring Regulations BS7671
Installation notes for guidance
- Cable Size 1.5mm² min. - 6mm² max.
- Cable connecting length max. 500mm / shorter if possible
- Connect to 32amp MCB b or c curve
- Neutral connection to neutral bar
- Earth connection to earth bar
- These SPDs are connected in parallel not series so can be used on any rating of current
- When carrying out insulation test, remove earth cable to device, or remove module, or do test at reduced voltage 250V DC max. Failure to abide by this advice may damage the arrester
- Please note these devices are earth leakage free and may be connected before or after rcd's, rcbo's etc
- These surge arresters are ideal for domestic installations
- You only need one arrester per board and all your outgoing circuits on that board will be protected
- CUSPDT21 can be used on TNS, PME, TT systems
- This surge arrester is easy to install, just connect it in parallel to your board, see the diagram below
Wiring Diagram: A schematic shows connections for Line (L), Neutral (N), and Earth (E) to the surge arrester unit.
Internal Components Diagram: A block diagram illustrates the surge arrester's internal structure, showing connections for L, N, and PE to internal components: 1. Detaching device, 2. MOV (Metal Oxide Varistor), 3. GDT (Gas Discharge Tube).
Technical Specifications
| SPD According to | IEC61643-11 EN61643-11 |
| Maximum continuous operating voltage UCV | 275V |
| Voltage protection level up 3kA(8/20µs)kA | < 1.5kV |
| Nominal discharge current in (8/20µs)kA | L- N 20kA N-PE 20kA |
| Max. discharge current Imax(8/20µs)kA | L- N 40kA N-PE 40kA |
| Response time | L- N <25ns N-PE<100ns |
| Torque | PE:2.0Nm L&N:1.2Nm |
| Dimensions | W18mm x H81mm x D88mm |
| Degree of protection | IP20 |
| Recommended backup MCB/fuse | 32A |
| Terminal capacity | 1.5-6mm² |
| Visual indication of status | Green: Ok Red: Replace Module |
| DIN rail mountable | Yes |
Batch Code Explanation
yyWxx: Manufacturing date code; year of manufacturing (yy) and week of manufacturing (Wxx)
Address/Helpline
Luceco PLC
Stafford Park 1
Telford TF3 3BD
ENGLAND
(EU) Luceco SE
C/ Bobinadora 1-5
08302 Mataró
SPAIN
If you have further technical assistance you can get in touch with our Technical Helpline on:
+44 (0)3300 249 279
Environmental Protection
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