220kv grounding protection device,China

be applicable to 220kV power transformer circuits in order to realize the conversion of earthing method

1.Purpose:

Provide over-voltage protection for neutral of 220 kV graded insulated transformers.

2.Product features:

(1)  Modular design, easy to choose type for different use.

(2)  The mounting brackets adopt seamless steel pipes,better stability and beautiful appearance.

(3)  Intelligent control units are equipped,electrical data can be uploaded via serial communications ports.

(4)  Use limit design bases on severe weather every 50 years.

(5)  High-voltage test equipment and test procedure ensure 100% delivery qualification rate.

3.Models:

THT-TNP-220/1    Rod Gap

THT-TNP-220/2    Rod Gap+Disconnector

THT-TNP-220/3    Rod Gap+Disconnector+Arrestor

THT-TNP-220/4    Rod Gap+Disconnector+Arrestor(compact)

Notes:to increase an intelligent control unit, the letter “Z” can be added to the end of the original model,e.g. THT-TNP-110/1-Z.

4.Installation:

   

The complete device is supported on the cement posts or steel supports which is usually provided by the tender. We can also supply the steel supports as an accessory.

5.Schematic diagram

6.Typical products parameters table

Transformer system Nominal Voltage		220kV
Insulation level	Light impulse withstand voltage	400 kV
	Power frequency withstand voltage	95 kV
Rod Gap	Type	THT-TNP-220
	Descriptions	Electrode bar with hemispheric ends
	The adjustable range	250-360mm
Current Transformer(Used for protecting rod gap )	Type	THT-LJ80
	Model	Epoxy-resin filled totallyclosed type
	Rated primary current	100A 150A 300A 400A 500A 600A
	Rated secondary current	1A/5A
	Accurate combination and ratings	10P5/10P5 15VA/15VA
Disconnector	Type	GW13-126
	Rated voltage	126Kv
	Rated current	630A/1250A
	Operating mechanism	CS17 type manual operating mechanism,CJ6 type motor-driven operating mechanism
Surge Arrester	Type	Y1.5W-144/320
	Nominal discharging current	1.5kA
	Rated voltage	144kV
	Continuous operating voltage	116kV
	Lighting impulse residual voltage	320kV
	Counter/Monitor	JS8 type surge arrester counter/JCQ3 type surge arrester monitor

Note: the above table is relating to the general parameters for your consideration, please let us know if you have any special requirements.

 

220kv grounding protection device,China