Categories | High Voltage Disconnecting Switch |
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Brand Name: | HERONG ELECTRIC |
Model Number: | GW4 |
Certification: | ISO9001 |
Place of Origin: | XI'AN CHINA |
MOQ: | 1PC |
Price: | Negotiable |
Payment Terms: | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
Supply Ability: | 1000SET/YEAR |
Delivery Time: | 30-45 DAYS |
Packaging Details: | Export wooden packing |
Type: | High-voltage |
Structure: | Double-column Disconnector |
Installation: | Outdoor High-voltage |
Operation: | Electric |
Grounding Mode: | Grounding |
Movement Mode: | Horizontal Rotary Type |
Company Info. |
herong electric |
Verified Supplier |
View Contact Details |
Product List |
GW4-145/1250, 2000 outdoor high voltage disconnector
1. General
1.1 Model
GW4-145/1250, 2000 outdoor high voltage disconnector
1.2 Function
Type GW4-145 disconnector is used to switch for the high-voltage
line under off-load circumstance, as well as electric isolation
between electric equipment as high voltage busbar, circuit breaker
being maintained. It provides visible insulation distance in
accordance with safety requirement.
1.3 Operation mechanism and model
Each disconnector equips one CJ6B motor drive mechanism or CS17
manual mechanism. For single earthing switch, it should be equipped
one CS17 manual mechanism and for double earthing switch, it should
be equipped two CS17.
1.4 The products are widely applied to 145kV substation depends on
its simple structure, convenient installation and reliable running.
2. Environment requirement
2.1 Environment temperature: -25ºC~+40ºC;
2.2 Altitude: ≤4500m.
2.3 Wind pressure: ≤700Pa.
2.4 Thickness of covered ice: ≤10mm.
2.5 Creepage distance of insulator: 2.5cm/KV, 3.1cm/KV
2.6 No frequent sharp shock or harmful materials such as flammable,
explosive, and chemical corrosion around the installation site.
3. Technical data
3.1 Main technical data
Data Model Item | GW4-145 | Remark | ||||
Rated voltage (kV) | 145 | |||||
Rated current (A) | 1250 | 2000 | ||||
Rated short-time withstand current of disconnector (kA) | 31.5 | 40 | 3s | |||
Rated peak value withstand current of disconnector (kA) | 80 | 100 | ||||
Rated short-time withstand current of earthing switch (kA) | 31.5 | 40 | 3s | |||
Rated peak value withstand current of earthing switch (kA) | 80 | 100 | ||||
Rated insulation level | Power frequency withstand voltage (1min, kV) (Effective value) | To earth | 275 | |||
To break | 315 | |||||
Lightning impulse withstand voltage (kV) (1.2/50μs, peak value) | To earth | 650 | ||||
To break | 750 | |||||
Rated mechanical load of connection terminal (N) | 750 | 750 | ||||
*Resistance of main switch circuit (μΩ) | ≤140 | ≤95 | ||||
**Resistance of earthing switch circuit (μΩ) | ≤300 | ≤300 |
3.2 Main technical parameter
Table 2
Model | Checked points | Size | Requirement of three poles close on the same time |
GW4-145 | Distance between disconnector breaks | ≥1550 | ≤15mm |
Distance between earthing switch breaks | ≥1320 | ≤15mm |
4. Category
The product can be categorized into three types:
Without earthing, single earthing (left earthing or right earthing)
and double earthing
Structure and operation principal:
GW4 series disconnectors are characterized by horizontal rotary,
making and breaking, two-pole; it mainly consists of supporting
base, rotary insulator, conducting components and operation
mechanism. The insulators on the both ends of each pole are fitted
on the bearing support of supporting base; inside the bearing
support is rolling bearing, which is flexible and light to be
operated. There are fixed and moving contacts and in-and-out
outlets. The operation mechanism will turn one insulator an angle
of 90°, another insulator of same phase will be reversely driven by
cross linking rod at an angle of 90°, thus the disconnector will
open or close towards one direction, the linking rod on each pole
of the other two ones will make or break after its linkage. An
interlocking device is equipped between the main switch and
earthing switch to guarantee only one of both switches can make or
break when another one acts effectively.
According to customers, the manual mechanism can be affiliated with
electromagnetic lock to realize the interlocking among the main
switch, earthing switch and breaker; therefore, thus preventing the
incorrect operation from occurring, meanwhile, motor drive
mechanism also can be used together with this switch..
Major features:
1. The supporting and revolving plate of porcelain insulator adopts
the precise casting technique to take place of the usual welding
technique, improving the ability of corrosion-resistance, strength
and shape.
2. The base frame and bearing support: the base frame, made of
shape steel, is connected with bearing support by assembling
method; the surface of base frame adopts hot galvanizing technique
to improve the corrosion resistance. Excellent sealing performance
of bearing support with superior lubrication oil filled inside it,
with which it can maintain flexility for the long time when it
turns, and even will not be blocked due to rust.
5. Terminal block adopts flexible connection instead of previous
roller movement, thus, improve reliability of the whole switch.
7. Adopt the connection of lathe dog between main switch and
mechanism, they are easily operated and not in need of welding on
site.