The Chint NXU-I+II Surge Arrester (Type 1 + Type 2) is a Surge Protective Device (SPD) designed to protect electrical systems from transient overvoltages caused by lightning strikes or switching surges. With discharge capacity up to 40kA, this SPD provides reliable protection for distribution boards, industrial equipment, communication systems, and sensitive electronics.
| Model | NXU |
| Type | Type 1 (Class I/B) + Type 2 (Class II/C) |
| Max Discharge Current (Imax) | 40kA |
| Voltage Protection Level (Up) | ≤1.5kV - ≤2.5kV (depending on model) |
| Standard | IEC 61643-11 / GB 18802.1 |
| Type | Location | Protection Level |
|---|---|---|
| Type 1 (Class I/B) | Main distribution board, at service entrance | Protection against direct lightning strikes |
| Type 2 (Class II/C) | Sub-distribution boards | Protection against indirect strikes and switching surges |
| Type 3 (Class III/D) | Near sensitive equipment | Fine protection for electronics |
Q: Where should I install the SPD?
A: Install Type 1 SPD at the main incoming distribution board (near the main breaker). Type 2 SPD should be installed at sub-distribution boards or downstream panels. For sensitive equipment, add Type 3 protection near the device.
Q: Does SPD need replacement after a surge?
A: The NXU has visual indication (green/red window) showing if protection is active. After major surges, the module may need replacement. Some models have replaceable cartridges for cost-effective maintenance.
Chint NXU-I+II Surge Protector T1 T2 Type 1 and 2 Type B and C Class I and II 40kA 50kA 1P 2P 3P 4P CHNT Surge Arrester
Standard: IEC/EN 61643-11
Protect class: I, II
Rate maximum continuous operational voltage: 275V, 385V
Poles: 1P, 2P, 3P,4P, 1P+N, 3P+N
Protection mode: L-PE, L-N, N-PE
Maximum discharge current(8/20μs)Imax: 50kA
Level of protection Up: 1.5kV for 275V; 1.8kV for 385V
Alternative function: Remote indication contact
Ambient temperature: -40 to +70°C
| Weight | 0.6 kg |
|---|---|
| Dimensions | 22 × 22 × 22 cm |
| Number of Pole |
1, 2, 3, 4, 1P+N, 3P+N |
| Nominal Discharge current |
20 |
