be applicable to 110kV 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 and lightning protection,China
