GW4-27.5(D)(W)
Built with a mature double-column horizontal rotary structure and premium copper-tungsten conductive parts, the switch features low contact resistance, high conductivity and stable current-carrying performance. Its optimized flexible structure avoids overheating and mechanical stress, ensuring safe and efficient power transmission for railway grid operation.
Equipped with high-strength anti-fouling insulators with extended creepage distance, this railway-specific disconnector delivers superior dielectric strength and anti-interference capability. It stably operates in humid, high-altitude and heavily polluted environments and guarantees secure circuit isolation during equipment maintenance.
All metal components adopt hot-dip galvanized treatment for excellent rust, oxidation and salt fog resistance. The optimized outdoor structure adapts to severe weather conditions including strong wind, rain erosion and temperature changes, realizing reliable all-weather operation along railway lines.
With high mechanical strength, long service life and reliable anti-misoperation interlock devices, the GW4-27.5(D)(W) supports manual and electric operation. It features easy installation and low maintenance, effectively cutting operational costs for railway power grid construction and upgrading.
As essential isolation and protection equipment for 27.5kV electrified railway power systems, this outdoor disconnector switch features stable performance and strong environmental adaptability. We offer global customers factory direct supply, complete certifications and professional one-stop after-sales service.
Product Details
GW4-27.5(D)(W)
Outdoor high voltage AC disconnector
□ Meaning of type
□Introduction
□The GW4-27.5(D)(W)disconnector is a kind of HV outdoorelectric equipments used in the electrical system with rated voltage 27.5kV,AC one or three phase,frequency 50Hz.It is used for switching on/off the circuit when there has voltage but no load in the electrified railway contact network and AC electric fenee.
□This disconnector consists of base,post insulator and conductive male contact,etc.The base has double plane bearing and it makes the switch operate deftly and reliably.
□The disconnector is a double-post plane rupture mid-opened type.It can match with ground swwitch on 1 side.It uses CS14G、CS11 manual operating mechanism or CJ series electromotor operating mechanism to realize single pole operation.The ground switch uses CS14G、CS11 manual operating mechanism.
□The disconnector conforms to the standards of GB1985-2004,DL/T486-200X,GB/T11022-1999, DL/T395-2006,etc.
□Working envionment
□Ambient temperature: -40℃~+40℃:
□ Altitude: <2000m
□Wind speed:<34m/s
□ lce thickness≤10mm
□Earthquake intensity≤8 degree
□Air pollution level:Ⅲ or
□Sunlight radiate:100W/m²(sunshine noon)
□Technical data
|
ltem |
Unit |
Value |
|||
|
Rated voltage |
kV |
27.5 |
|||
|
Rated nsulating level
|
a)1minpower frequency withstand voltage(validvalue) |
To the earth |
kV |
95 |
|
|
Interrupter |
kV |
105 |
|||
|
b)Rated thunder impulse withstand voltage(peak) |
To the earth |
kV |
200 |
||
|
Interrupter |
kV |
220 |
|||
|
Rated frequency |
Hz |
50 |
|||
|
Rated current |
A |
630125020002500 |
|||
|
Rated short time withstand current |
KA |
2031.540 |
|||
|
Ration peak withstand current |
KA |
2580100 |
|||
|
Rated short-circuit duration Main/earthing blade |
s |
4/2 |
|||
|
Rated terminal mechanical load |
Horizontal portrait |
N |
750 |
||
|
Horizontal transverse |
N |
500 |
|||
|
Vertical force |
N |
750 |
|||
|
Creepage distance |
mm |
1005/1200 |
|||
|
Mechanical life |
T i m e s |
5000 |
|||
|
Electromotor operating mechanism |
Type |
|
CJ |
||
|
Motor voltage |
V |
AC380、DC220、DC110 |
|||
|
Controlloop voltage |
V |
AC220、AC380、DC220、DC110 |
|||
|
Switch-off/on time |
s |
7±1 |
|||
|
Manual operating mechanism |
Type |
|
CS14G,CS11 |
||
|
Electromagnetic lock voltage |
V |
AC220、DC220 |
|||
|
Weight of product |
Without earthing |
kg |
120 |
||
|
Single earthing |
kg |
150 |
|||
□ Technical data
|
□ Technical data |
|||||
|
ltem |
Unit |
Value |
|||
|
Rated voltage |
kV |
121824 |
|||
|
Rated Insulatng level
|
a) 1minpowerfrequency withstand voltage(validvalue) |
To the earth |
kV |
42 |
|
|
Interrupter |
kV |
49 |
|||
|
b) Rated thunder impulse withstand voltage(peak) |
To the earth |
kV |
75 |
||
|
Interrupter |
kV |
85 |
|||
|
Rated frequency |
Hz |
50 |
|||
|
Rated current |
A |
2004006301250 |
|||
|
Rated short time withstand current |
KA |
12.5162031.5 |
|||
|
Ration peak withstand current |
KA |
31.5405080 |
|||
|
Rated short-circuit duration Main/earthing blade |
s |
4/2 |
|||
|
Rated termlnal mechanlcal load |
Horizontal portrait |
N |
500 |
||
|
Horizontal transverse |
N |
250 |
|||
|
Vertical force |
N |
300 |
|||
|
Creepage distance |
mm |
300372450558600744 |
|||
|
Mechanical life |
Times |
10000 |
|||
|
Electromotor operating mechanism |
Type |
|
CT-X |
||
|
Motor voltage |
V |
AC380 AC220 DC220 DC110 |
|||
|
Controlloop voltage |
V |
AC380 AC220 DC220 DC110 |
|||
|
Switch-off/on time |
s |
7±1 |
|||
|
Manual operating mechanism |
Type |
|
CS11 CS8-6D |
||
|
Electromagnetic lock voltage |
V |
AC220、DC220 Dc110 |
|||
|
Weight of product |
Without earthing |
kg |
45100160 |
||
|
Single earthing |
kg |
65120180 |
|||
|
Double earthing |
kg |
80140200 |
|||
□Outline dimension
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