ZL(S)2 Surge Arrester (Class I)
ZL1-G Series
Graphite-gap Class I SPD, max 50kA (10/350us) impulse current, cut-off of AC follow-up current to prevent thermal runaway, modular pluggable hot-swappable.
Product Overview
The ZL(S)2 surge protective device (Type 1) uses graphite gap technology, purpose-built to discharge high-energy direct lightning strikes. Surpassing ordinary varistors, it can withstand extreme impulse currents (Iimp) of up to 50kA (10/350μs), making it the ideal choice for incoming-line (LPZ0-1) protection. After discharge, it effectively interrupts power-frequency follow current, fundamentally eliminating the risk of "thermal runaway" and fire caused by SPD degradation short-circuits. Its ultra-compact 72mm body integrates the complete Type 1 protection circuit and complies with GB 18802.11 and IEC 61643-11 standards.
Core capabilities
Powerful direct lightning capability: energy discharge capacity and thermal capacity far exceeding ordinary varistors, able to withstand impulse currents of up to 50kA (10/350μs waveform). Intrinsically safe with no fire risk: effectively interrupts power-frequency follow current after discharge, avoiding "thermal runaway" and fire caused by SPD degradation short-circuits. Modular pluggable design: the module is separate from the base, so a failed protection module can be hot-swapped individually without power outage or rewiring. High-performance density design: the complete Type 1 protection circuit is integrated in an ultra-compact 72mm body, delivering big performance in a small size. Product Features
Data Generated
Product Features
Powerful direct lightning capability
Energy discharge capacity and thermal capacity far exceeding ordinary metal oxide varistors (MOV), able to withstand impulse currents (Iimp) of up to 50kA (10/350μs waveform), fully meeting the stringent Type 1 protection requirements for discharging part of the direct lightning strike energy.
Intrinsically safe with no fire risk
Effectively interrupts power-frequency follow current after discharge, fundamentally avoiding "thermal runaway" and fire risks caused by SPD degradation short-circuits, ensuring safe operation of the distribution system.
Modular pluggable design
The module is separate from the base, allowing a failed protection module to be hot-swapped individually without power outage or rewiring, reducing maintenance cost and time.
High-performance density design
The complete protection circuit meeting Type 1 requirements is integrated within an extremely compact 72mm width. With Up values of 275V and 2.5kV, it delivers small size and big performance, similar in size to miniature circuit breakers.
Long service life with slow degradation
Graphite material is arc-resistant and impact-resistant, with stable performance parameters after repeated operations. Expected service life and reliability exceed conventional components, with lower protection costs.
Fast response with low residual voltage
Response time ≤100ns, operating at the very early stage of an overvoltage wavefront rise. With a voltage protection level (Up) as low as 2.5kV, it provides fine protection for equipment such as UPS, servers, and PLCs. Selection Guide
System Topology
Selection Guide
Model naming rules
ZLx - Structure - Iimp / Uc - Protection Mode ZLx Product Category 1: Type 1 power surge arrester; S1: Type 1 power surge arrester (remote signaling); 2: Type 2 power surge arrester; S2: Type 2 power surge arrester (remote signaling); 3: Type 3 surge arrester; 4: signal surge arrester Structure Core structure V: varistor; F: discharge tube; G: graphite gap; BC: hybrid Iimp Maximum impulse current 6kA (6.25kA); 12kA (12.5kA); 15kA; 25kA; 40kA; 50kA Uc Maximum continuous operating voltage AC: 255/275/320/385/440/690/760V; DC: 500/600/800/1000/1200/1500/1800/2000V Mode Protection mode AC: 1P; 2P; 3P; 4P; 1+NPE; 3+NPE; DC: U; Y Imax Maximum discharge current 20kA; 40kA; 60kA; 80kA; 100kA Model Structure Poles Uc Iimp Up Response time Dimensions (L×W×H mm) Local indication Remote signaling ZL1-G-12.5/275-4P Graphite gap 4P 275V 12.5kA 2.5kV ≤100ns 72×83×67 √ --- ZLS1-G-15/385-4P Graphite gap 4P 385V 15kA 2.5kV ≤100ns 72×83×67 √ √ ZL1-G-25/320-3+NPE Graphite gap 3+NPE 320V 25kA 2.5kV ≤100ns 72×90×71 √ --- ZLS1-G-25/275-1+NPE Graphite gap 1+NPE 275V 25kA 2.5kV ≤100ns 36×90×71 √ √ ZL1-G-40/385-4P Graphite gap 4P 385V 40kA 2.5kV ≤100ns 144×91×65 √ --- ZL1-G-50/690-3+NPE Graphite gap 3+NPE 690V 50kA 2.5kV ≤100ns 144×91×65 √ --- Technical Parameters
| Model | Structure / Poles / Uc / Iimp / Up / Response time / Dimensions (L×W×H mm) / Local indication / Remote signaling |
| ZL1-G-12.5/275-4P | Graphite gap / 4P / 275V / 12.5kA / 2.5kV / ≤100ns / 72×83×67 / √ / --- |
| ZLS1-G-15/385-4P | Graphite gap / 4P / 385V / 15kA / 2.5kV / ≤100ns / 72×83×67 / √ / √ |
| ZL1-G-25/320-3+NPE | Graphite gap / 3+NPE / 320V / 25kA / 2.5kV / ≤100ns / 72×90×71 / √ / --- |
| ZLS1-G-25/275-1+NPE | Graphite gap / 1+NPE / 275V / 25kA / 2.5kV / ≤100ns / 36×90×71 / √ / √ |
| ZL1-G-40/385-4P | Graphite gap / 4P / 385V / 40kA / 2.5kV / ≤100ns / 144×91×65 / √ / --- |
| ZL1-G-50/690-3+NPE | Graphite gap / 3+NPE / 690V / 50kA / 2.5kV / ≤100ns / 144×91×65 / √ / --- |
Technical Parameters
Basic parameters
Operating voltage AC 220V Mounting Standard 35mm DIN-rail mounting Operating temperature -40℃~70℃ Operating humidity 5%~95% Housing material Thermoplastic flame-retardant material PBT G20 V0 Protection rating IP20 Standards GB 18802.11, IEC 61643-11
| Operating voltage | AC 220V |
| Mounting | Standard 35mm DIN-rail mounting |
| Operating temperature | -40℃~70℃ |
| Operating humidity | 5%~95% |
| Housing material | Thermoplastic flame-retardant material PBT G20 V0 |
| Protection rating | IP20 |
| Standards | GB 18802.11, IEC 61643-11 |
Surge protection parameters
Protection class T1 Core structure Graphite gap (G) Maximum continuous operating voltage Uc 275V/320V/385V/690V/760V AC Maximum impulse current Iimp 12.5kA/15kA/25kA/40kA/50kA Voltage protection level Up 2.5kV Response time ≤100ns 4P external dimensions 72×83×67 / 144×91×65 mm 3+NPE external dimensions 72×90×71 / 144×91×65 mm 1+NPE external dimensions 36×90×71 mm Installation Instructions
| Protection class | T1 |
| Core structure | Graphite gap (G) |
| Maximum continuous operating voltage Uc | 275V/320V/385V/690V/760V AC |
| Maximum impulse current Iimp | 12.5kA/15kA/25kA/40kA/50kA |
| Voltage protection level Up | 2.5kV |
| Response time | ≤100ns |
| 4P external dimensions | 72×83×67 / 144×91×65 mm |
| 3+NPE external dimensions | 72×90×71 / 144×91×65 mm |
| 1+NPE external dimensions | 36×90×71 mm |
Installation Instructions
a
Installation dimensions diagram
ZL(S)2 Surge Protective Device (Type 1) Installation dimensions diagram b
Interface description
Power interface definition No. Interface Definition 1 L1, L2, L3 Three-phase live wires 2 N Neutral 3 PE Ground
| No. | Interface / Definition |
| 1 | L1, L2, L3 / Three-phase live wires |
| 2 | N / Neutral |
| 3 | PE / Ground |
Key Points
Definition: The ZLS2 Type 1 surge protective device is a FEXLINK Type 1 SPD designed for primary protection at the power incoming line, with high direct lightning current handling capability. Core capabilities: Using a voltage-switching structure with high Imax, it is suitable for direct lightning protection at the main power incoming line and can coordinate with Type 2 SPDs in stages. Application scenarios: Suitable for primary lightning protection scenarios such as main power distribution of important buildings, industrial plant incoming lines, and outdoor facilities. Related products: Type 1 surge protective devices, Type 2 surge protective devices, and FSS intelligent surge protective devices.
FAQ
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