CHINT NXU-II Low-Voltage Surge Protective Device (SPD),
provides dependable protection against lightning strikes and transient overvoltages in electrical systems.
Designe for 230/400V AC networks, it supports Class II surge protection with a maximum discharge current of up to 40kA.
Built with a modular, pluggable design, the NXU-II ensures easy maintenance and high reliability.
Certified to IEC/EN 61643-11 and CE, RoHS standards, it is ideal for residential,
commercial, and industrial installations requiring stable surge suppression.
- Function: Protection against lightning and transient overvoltage in low-voltage power systems
- Standard Compliance: IEC/EN 61643-11
- Certifications: CE, RoHS
- Test Class: Class II
- Maximum Discharge Current (Imax): 20kA / 40kA
- Nominal Discharge Current (In): 10kA / 20kA
- Maximum Continuous Operating Voltage (Uc): 255V, 275V, 320V, 385V, 440V
- Voltage Protection Level (Up): 1.2kV – 2.0kV
- Rated Frequency: 50/60Hz
- Applicable Grounding Systems: TT, TN-S, TN-C, IT
- Short-Circuit Current Withstand Capacity: 5kA
- Protection Modes: L-PE/N-PE and L-N/N-PE
- Poles Available: 1P, 1P+N, 2P, 3P, 3P+N, 4P
- Backup Fuse Rating:
- 20kA model → 63A (gL/gG type)
- 40kA model → 125A (gL/gG type)
- Transient Overvoltage (TOV) Withstand:
- Uc 275V / 320V → UT = 336V (5s), fault mode UT = 442V (120min)
- Uc 385V / 440V → fault mode UT = 442V (120min)
- Mechanical Design: Modular pluggable cartridge + base
- Fault Indication: Red visual signal on deterioration
- Optional Feature: Remote signaling contact (model NXU-II/F)
- Terminal Connection Capacity:
- M4: ≤10mm² (torque 1.5N·m)
- M5: ≤16mm² (torque 2.0N·m)
- Protection Degree: IP20
- Mounting: DIN rail 35mm (EN 60715)
- Dimensions (mm):
- 1P / 1P+N / 2P: 18W × 90H × 65D
- 3P / 3P+N / 4P: 36W × 90H × 65D
- Weight: Approx. 150–300g (depending on poles)
- Installation Altitude: ≤2000m
