- Contact Person : Ms. xu Alice
- Company Name : Baoding Tianwei Hengtong Electric Co., Ltd
- Tel : 86-312-8919975
- Fax : 86-312-8919796
- Address : Hebei,Baoding,3/F-A,Building 7,No.5699,University Science and Technology Park in High-Tech Zone
- Country/Region : China
Transformer neutral grounding protection devise
1.The grounding protection device is applicable to 110kV, 220kV or 330kV power transformer circuits in order to realize the conversion of earthing method.
2.Structure
(1)Disconnecting Switch
(2)Zinc-oxide Surge Arrestor
(3)Rod Gap
(4)Current Transformer
(5)Mounting Brackets
3.Installation: The complete device is supported on the cement posts or steel supports which is usually provided by the tender. W e can also supply the steel supports as an accessory.
4.Site condition:
(1)Ambient temperature: -50°C-70°C
(2)Altitude: less than 4500m.
(3)Frequency :50Hz or 60Hz
(4)Installation: Indoor or outdoor
5.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 | |
Disconnecting Switch | 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.
6.Choosing the type
Type | Voltage level | Configuration solutions |
THT-TNP-110/220/330/Ⅰ | 110kV/220kV/330kV | Protection Rod Gap |
THT-TNP-110/220/330/Ⅱ | 110kV/220kV/330kV | Rod Gap and Disconnecting Switch |
THT-TNP-110/220/330/Ⅲ | 110kV/220kV/330kV | Rod Gap ,Disconnecting Switch and arrester |
THT-TNP-110/220/IV | 110 kV | Rod Gap ,Disconnecting Switch and arrester (compact) |
Transformer neutral grounding protection devise
