ZGZNSD20-F Intelligent SPD
General
ZGZNSD20-F Intelligent SPD is a high-performance, high-intelligence surge protection product independently developed and produced by ZG, which can meet the requirements of high automation and remote monitoring. The product integrates the SPD, monitoring module, and lightning current and leakage current sensors with itself. The operating status and parameters of the SPD can be transmitted to the monitoring terminal through the device bus and the network in real time, so that the staff can understand the running status and parameters of the SPD in real time, and timely repair the faults to ensure the safe and smooth operation of the system.
Operating Environment
| Power supply of monitoring module |
DC: +4 V～+16 V |
| Temperature |
-40 ℃ ～85 ℃ |
| Relative humidity |
5 % ～95 % |
| Altitude |
-500 m ～﹢4000 m |
Product Configuration (Standard Configuration)
| Name |
Quantity |
Unit |
Remarks |
| ZGZNSD20-F intelligent SPD |
1 |
PCS |
|
| Monitoring center software |
1 |
Set |
For one project, a set of software programs is equipped. |
Performance Index
Intelligent monitoring module
| Monitoring range of surge current amplitude |
±500 A～±20 kA |
| Monitoring error of surge current amplitude |
≤±15% |
| Monitoring range of leakage current |
50 uA～30 mA |
| Monitoring error of leakage current amplitude |
≤± (standard value × 10% + 2 μA) |
| Number of times of SPD action storage |
1～999 |
| SPD action time |
xx-xx-xxxx, 00: 00: 00 |
| Communication mode |
RS485 bus (Modbus protocol) |
| Power consumption of device |
<0.5 W |
Surge protective device
| SPD according to IEC 61643-1 |
Class Ⅱ |
| SPD according to EN 61643-11 |
Type 2 |
| Max. continuous operating voltage Uc |
L-N: 385 V 50/6 0HZ, N-PE: 255 V 50/60 HZ |
| Nominal discharge current In (8/20μs) |
20 kA |
| Max. discharge current Imax (8/20μs) |
40 kA |
| Voltage protection level Up |
L-N: 1.8 kV, N-PE: 1.0 kV |
| Residual voltage Ures (3kA) |
1.5 kV |
| Follow current interrupting rating Ifi |
N-PE: 100 A rms |
| Max. backup fuse |
80 A gL/gG |
| Connection mode |
In parallel |
| Protection mode |
L-N, N-PE |
| Response time tA |
L-N: ≤ 25 ns, N-PE: ≤ 100 ns |
| Cross-sectional area of the connection between the copper wire and the terminal block |
Multi-core: 1.5～25 mm2, single-core: 1.5～35 mm2 |
| Torque: terminal block |
2.5 Nm |
| Application system |
TT, TN |
| Warranty period |
24 months |
Standards Complied
Q/75875187-9·7 – 2016 Lightning Monitoring System
GB 18802.1-2011 Low-voltage surge protective device (SPD) – Part 1: Surge protective devices connected to low-voltage power distribution systems – Performance requirements and testing methods
IEC 61643-11:2011 Low-voltage surge protective devices – Part 11 Surge protective devices connected to low-voltage power systems – Requirements and test methods
EN 61643-11_2012 Low-voltage surge protective devices – Part 11 Surge protective devices connected to low-voltage power systems – Requirements and test methods
UL 1449 Ed.4 Standard for Safety for Surge Protective Devices
Overall Dimensions
The ZGZNSD20-F intelligent SPD has dimensions of 108 mm × 104 mm × 66.5 mm (L × W × H).
Working Principle
When a surge occurs, the inrush current flows into the device through the phase line. The lightning current sensor on the device collects the inrush current signal, performs signal conditioning, analog-to-digital conversion, and algorithm processing to obtain the number of SPD actions, the surge current amplitude, and the SPD action time, and then send alarms.
At the same time, the device monitors the remote signaling alarm signal of the SPD and monitors the leakage current of the MOV operation. The processor encodes all the data information and finally summarizes and uploads it to the monitoring center through the RS485 bus.
The system monitoring software displays the working state of the SPD in real time, and obtains the deterioration state of the SPD according to the monitored surge current parameters and leakage current of the MOV working.
Functional Characteristics
Real-time monitoring of SPD working status: Real-time acquisition of parameters of surge currents flowing through the SPD (peak, polarity, frequency, and time), working leakage current parameters, and SPD disconnector status through the high-performance sensor to achieve measurement and recording of SPD working status for timely alarm.
SPD performance degradation warning: Through the analysis of surge current parameters and monitored data of leakage current, when the warning threshold is reached, the SPD performance degradation warning is performed to realize the prophetic awareness of SPD degradation, and the module with hidden danger can be replaced in advance to avoid accidents.
Remote communication: Configure RS485 interface, execute Modbus protocol, and expand different communication interfaces according to actual transmission requirements, to realize remote communication and management of equipment.
Modular design: The surge protection unit and the monitoring unit are modular in design, which is convenient for installation and maintenance.
High reliability design: The circuit of the surge protection unit is independent of that of the monitoring unit. The failure of the monitoring unit will not affect the surge protection performance, thus ensuring the effectiveness of lightning protection. At the same time, the anti-interference design is adopted, and the immunity of the monitoring unit meets the requirements of GB/T17626.
