Elmeasure · Circuit protection
Elmeasure CURO Surge Protection Device
Price on enquiry
DIN-rail surge protection devices for AC and DC systems against lightning and switching surges.
Sankalp Electricals is an authorised channel partner of Elmeasure.
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Key features
- Type 2 AC, Type 1+2 AC and Type 2 DC (solar PV) versions
- Response time less than 25 ns
- Visual status indication window (green ok / off defect)
- Built-in thermal protection
- Compact modular design for 35 mm DIN rail
- Optional remote signalling contacts
Applications
- Main distribution boards and sub-panels (Type 2 AC)
- Solar PV string boxes and DC-side inverter protection (Type 2 DC)
- Buildings with external lightning protection or overhead supply lines (Type 1+2)
Technical specifications
| Poles | 1P+N / 3P+N |
|---|---|
| Nominal AC voltage Uo / Un | 230 V (50/60 Hz) |
| Max. continuous operating voltage Uc (L-N) | 275 V (1P+N) / 385 V (3P+N) |
| Max. continuous operating voltage Uc (N-PE) | 255 V |
| Nominal discharge current In (8/20 µs) | 40 kA |
| Maximum discharge current Imax (8/20 µs) | 40 kA |
| Open circuit voltage Uoc (1.2/50 µs) | 6 kV |
| Voltage protection level Up (L-N / N-PE) | 1.5 kV / 1.5 kV (1P+N); 1.8 kV / 1.5 kV (3P+N) |
| Response time tA (L-N / N-PE) | <25 ns / <100 ns |
| Follow current interrupt rating If (N-PE) | 100 ARMS |
| Max. backup fuse | 125 A gG |
| Short-circuit current rating ISCCR (L-N) | 25 kA |
| TOV withstand UT (L-N) | 335 V (5 s); 440 V (120 min) |
| TOV withstand UT (N-PE), 200 ms | 1200 V |
| Poles | 1P+N / 3P+N |
|---|---|
| Nominal AC voltage Uo / Un | 230 V (50/60 Hz) |
| Max. continuous operating voltage Uc (L-N) | 275 V (1P+N) / 385 V (3P+N) |
| Max. continuous operating voltage Uc (N-PE) | 255 V |
| Impulse discharge current Iimp (10/350 µs) | 12.5 kA |
| Total discharge current Itotal (10/350 µs) | 25 kA (1P+N) / 40 kA (3P+N) |
| Nominal / maximum discharge current (8/20 µs) | 40 kA / 40 kA |
| Specific energy W/R | 39 kJ/Ω |
| Charge Q | 6.25 As |
| Voltage protection level Up (L-N / N-PE) | 1.5 kV / 1.5 kV (1P+N); 1.8 kV / 1.5 kV (3P+N) |
| Response time tA (L-N / N-PE) | <25 ns / <100 ns |
| Max. backup fuse | 250 A gG |
| Short-circuit current rating ISCCR (L-N) | 25 kA |
| TOV withstand UT (L-N) | 335 V (5 s); 440 V (120 min) |
| Poles | 2P / 3P |
|---|---|
| Max. continuous operating voltage Ucpv | 600 V DC (2P) / 1000 V DC (3P) |
| Nominal discharge current In (8/20 µs) | 20 kA |
| Maximum discharge current Imax (8/20 µs) | 40 kA |
| Total discharge current Itotal (8/20 µs) | 40 kA |
| Voltage protection level Up | 2.2 kV (2P) / 4.0 kV (3P) |
| Residual current IPE | <0.5 mA |
| Response time tA | <25 ns |
| Short-circuit current rating Iscpv | 10 kA |
| Operating temperature | -40 °C to +85 °C |
|---|---|
| Operating humidity | 5% to 95% |
| Altitude | -500 m to 2000 m (80 kPa to 106 kPa) |
| Terminal screw torque | 2.5 Nm |
| Conductor cross section (max.) | 35 mm² solid/stranded, 25 mm² flexible |
| Mounting | 35 mm DIN rail, EN 60715 |
| Degree of protection | IP20 (built-in) |
| Housing material | Thermoplastic, UL 94 V-0 |
| Remote contact conductor (max.) | 1.5 mm² solid (16 AWG) |
