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Labeled Diagram  Model SNCS1.5K to SNCS10K PPSPG

Switching-Off Procedure for Model SNCS1.5K to SNCS10K

Switching-On Procedure for Model SNCS1.5K to SNCS10K 

Labeled Diagram for  SNCS300 and SNCS500 PPSPG

300 Watt solar energy box

Switching-on Procedure for Model SNCS300 to SNCS500 PPSPG

300 Watt solar energy box

Switching-off Procedure for Model SNCS300 to SNCS500 PPSPG

300 Watt solar energy box

Transient Volatge Surge Suppressor (TVSS) - for DC Power

Transient Volatge Surge Suppressor (TVSS) - for AC Power 

Transient Voltage Suppressor (TVS) or 

Surge Protective Devices (SPD)

Suchnetcom Solar trades on a TVS brand providing protection solutions that safeguard electronics /electrical / communications / solar power systems against damage or latch-up caused by electrostatic discharge (ESD), lightning (surge), and other destructive transient voltages. 

Click to view price list SPD for PVM            Click to view price list TVSS        

Due to the existence of the earthing resistance, a direct or close lightning strike may cause a high voltage drop from earthing resistance to the distance surrounding, this is a great threat to the electrical & electronic equipment in the building. Besides the high voltage drop at the earthing resistance, the induction of the electromagnetic wave caused by the lightning will also produce surges to the system and equipment

The Need for Surge and Lightning Protection

Each year there are millions of lightning strikes all over the world. The enormous energy of lightning have inflicted huge damages to property and also endanger human lives, to avoid these damages, surge protective devices should be installed. In present days, with the rapid development of electronic communication devices and much more sensitive operational voltages, these led to equipment can be easily damaged by surge & lightning.

Sources of surge Lightning strike include direct lightning strike, close lightning strike and distant lightning strike. The amplitudes and energy of the impulse currents and voltages generated are especially dangerous to the electronic system to be protected.

Direct or close lightning strike

(1a): Lightning strike at external lightning 

        protection system, such as a process  

        control system (industrial installation), 

        cables etc.

(1b): Voltage drop at the earthing resistance ER 

         caused by lightning current.

(1c): Inductive surge voltage in close loop

Distant lightning strike

Distant lightning strike is that the strike point is at a distance from the protected devices, or striking at the high voltage overhead lines and its vicinity, or the lightning discharge between the clouds (2a, 2b, 2c).

(2a): Strike in distant overhead lines

(2b): Inductive lightning impulse waves and surges on overhead lines caused by cloud-to-cloud lightning

(2c): Effected field caused by the lightning.

Surge caused by switching operation

- Open or close electrical circuit on inductive 

   load (e.g. Transformer, magnetic core, 


- Ignition or interruption of electric arc (e.g. 

   arc welding Device)

- Operation of circuit breaker

Step voltage 

When lightning occurs, the adjacent trees could become a conductor for lightning current, if the lightning strikes the trees, a huge voltage difference will be formed around the trees because of the large current. If a man’s feet standing on the ground separately, a deadly step voltage difference Uo will develop, this voltage difference could be life threatening.

Lightning discharge

All conductors may conduct lightning current, such as:

1.Power supply lines

2.Data lines

3.Air termination devices (or earthing 



Internal lightning protection includes:

* Shielding;

* Equipotential bonding;

* SPD installation

Internal Lightning Surge Protection Protects Electronic Equipment

Lightning protection system

External lightning protection includes:

Lightning protection system is consisted of: External lightning protection and internal lightning protection.

* Air termination device (lightning rod, belt 

   and grid);

* Down conductor;

* Earthing system

External Lightning Protection Mainly Protects Building & Structure

SPD On Fire

Due to the fact that most of our SPDs have plastic housing and parts, in the event of a SPD short-circuited or overloaded, large amount of heat will be dissipated, the plastic housing or parts might become distorted, this might prevent the releasing mechanism to operate as SPD original design, and fail to disconnect from the main power. Therefore for double safety reason, additionally at the power SPD upstream we also installed a fuse or circuit breaker.

The TVS Series offer these key benefits:

High power protection from voltage  

   transients and surge lightning events as 

   well as excellent clamping performance 

   for increased reliability of sensitive 


•Replaces AC side and DC side MOVs with a 

   solution that provides better reliability, 

   accurate clamping, and fast response time 

   when compared to MOVs.

Typical markets and applications for TVS Series include:

Data Centers


•Home Appliances

•Consumer Electronics

•AC and DC Protection

•Power over Ethernet (PoE) Protection

•Low-speed Outdoor Port Protection

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