SPD surge protective device/lightning surge protector 20KA

Surge protective device, protect against lightning surge voltages in solar system (photovoltaic power supply system). 
These units must be installed in parallel on the DC networks to be protected and provide common and different modes protection. Its installed location are recommended at both ends of the DC power supply line (solar panel side and inverter/converter side), especially if the line routing is external and long. 
High energy MOVs equipped with specific thermal disconnectors and related failure indicators. 

LYD1-C SURGE PROTECTIVE DEVICE (SPD)

 

LYD1-C series surge protective device is suitable used in the IT, TT, TN-S, TN-C-S and low-voltage AC power distribution system, rated voltage up to 380V, to protect from direct and indirect lightning impulse and other transient over voltage. As per the conditions of IEC61643-1:1998-02 ST standard, Class 3 surge protective device, it is category C surge protective device. SPD has two protection modes: MC and MD, SPD is incompliance with IEC 61643-1 standards.

 

Installation

1. To be mounted between LPZ0B zone or LPZ1 zone and LPZ2 zone, adopts 35mm standard mounting rail. The cross sectional area of multi-stand soft copper conductor: 2.5-35mm2.
2. Every phase of SPD shall be protected by fuse or mini circuit breaker from short circuit when SPD is broken down caused by surging voltage.
3. It is mounted in distribution boxes of different floors, computer center, telecommunication room, control room of elevator, CATV room, fire fighting center, distribution box of village, etc.

 

Operation Elements

1. SPD as only one side of terminals ,able to prevent from being electric touching, indoor fixedly mounted, limiting voltage.
2. SPD has build-in disconnector, when SPD is invalid due to overheating or breakdown, the disconnector can automatically separate SPD from the network, meanwhile send an indication signal. The visible window show white color in normal service, if to be separated from network, it will show red color.
3. 1P+N, 2P+N, 3P+N SPD consist of 1P, 2P, 3P SPD and NPE neutral and earthing protection modules, used in the power supply system of TT, TN-S, etc.

Technical Parameter

Model and specification	NYKD1-C40
Maxi continuous operating voltage Uc(V/AC)	1000	750	420	385	320	275	175	48
Voltage protective level(kV)≤	3.5	3.0	2.0	1.8	1.6	1.5	1.3	0.6
Maxi discharge current Imax(kA) (8/20µs)	40
Normal discharge current Imax(kA) (8/20µs)	20
Response time(ns)	<25
Protection grade	IP20
Indication of invalidation	Aging invalidation: white is normal and red is invalidation
Application	Primary protection for in line
Remote signal function	Remote signal function can select.
Remarks	Maxi continuous operating voltage can be customized.

 

Principle diagram: