1.Why us
a. We are professional supplier for neutral protection equipment of electric system.
b. Neutral grounding products are regarded as the No. 1 brand of the country.
c. Strong R&D team provide you with the most professional solutions and technical service.
d. Exquisite production process provide you with high-quality production.
e. Strong production capacity ensure timely delivery.
2. Application
The grounding protection device is applicable to 110kV, 220kV or 330kV power transformer circuits in order to realize the conversion of earthing method. Provide over-voltage protection for neutral of 110 kV 220KV 330KV graded insulated transformers.
3. Specification :
a. Ambient temperature: -50℃-70℃
b. Altitude: less than 4500m.
c. Frequency : 50Hz or 60Hz
d. Installation: Indoor or outdoor
e.Stardard:GB311.1-1997,DL/T620-1997
f. Package: Fumigation-free woodiness packaging
4. Advantage
a. Modular design, easy to choose type for different use.
b. The mounting brackets adopt seamless steel pipes,better stability and beautiful appearance.
c. Intelligent control units are equipped, electrical data can be uploaded via serial communications ports.
d. Use limit design bases on severe weather every 50 years.
e. High-voltage test equipment and test procedure ensure 100% delivery qualification rate.
5. Regular Technical Particulars for reference
Transformer system Nominal Voltage | 110kV | 220kV | ||
Insulation level | Light impulse withstand voltage | 250 kV | 325 kV | 400kV |
Power frequency withstand voltage | 95 kV | 140kV | 200kV | |
Rod Gap | Type | THT-TNP-110 | THT-TNP-220 | |
Descriptions | Electrode bar with hemispheric ends | |||
The adjustable range | 50-160mm | 250-360mm | ||
Current Transformer(Used for protecting rod gap ) | Type | THT-LJ80 | ||
Model | Epoxy-resin filled totally closed 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 | GW13-72.5 | GW13-126 | |
Rated voltage | 72.5kV | 126Kv | ||
Rated current | 630A/1250A | |||
Operating mechanism | CS17 type manual operating mechanism,CJ6 type motor-driven operating mechanism | |||
Surge Arrester | Type | Y1.5W-60/144 | Y1.5W-72/186 | Y1.5W-144/320 |
Nominal discharging current | 1.5kA | |||
Rated voltage | 60kV | 72kV | 144kV | |
Continuous operating voltage | 48kV | 58kV | 116kV | |
Lighting impulse residual voltage | 144kV | 186kV | 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.
6. Product structure and configuration scheme
a. Disconnecting Switch
b. Zinc-oxide Surge Arrestor
c. Rod Gap
d. Current Transformer
e. Mounting Brackets
7.Ordering information
Service condition ,installation environment, system normal voltage , insulation standard
