| I.General: |
| GGD AC low voltage distribution board is power plants,transformer |
|
| substations and industrial corprations.It serves as power source,power |
| transformation,distribution and control equipment of
illumination and distribution |
| equipment in AC 50Hz
distribution systems with rated voltage 380V and rated |
| current not exceeding
3150A.The product has high breaking caqacity,and its rated |
| prospective
short-circuit withstand current can reach 50kA.Because of its
flexible wiring scheme,it provides |
| convenient
arrangement,favorable practiability and novel structure.The
product is representative product of |
| national
assembled and fixable switchboard. |
|
The priduct is compliant with Low Voltage Unit Switch Equipment
and Control Equipment standard IEC439 and Low |
| Voltage Unit
Switch Equipment standard GB7251. |
| II.Service
Condition |
| 1.The
ambient temperature is between -5℃ and +40℃,and the mean
temperature of 24hours is not above +35℃. |
| 2.Indoor
installation,the altitude of using site not exceeding 2000m. |
| 3.Relative
air humidity not above 50% when the ambient temperature is not
above +40℃.when the temperature is |
|
relatively low,higher relative air humidity is allowed(For
example,the allowed relative air hunidity is 90% when |
|
the ambient temperature is +20℃).Condensation may occur
occasionally due to temperature altemation. |
| 4.The
lean between equipment and vertical plane should not exceed 5%
during installation. |
| 5.In
order to protect the electric components,the equipment should be
mouted at site without serious vibration |
| and impact. |
|
6.Please consult our company if you have special requirement. |
| |
|
 |
|
III.Main Technical Parameters |
| 1.The
Basic Electric Technical Parameters Are Showed |
Type |
Rated
Voltage(V) |
Rated
Current(A) |
Rated
Short-circuit Switch Current(kA) |
Rated
Short-time Withstand Current(IS)(kA) |
Rated
Peak Value Withstand Current(kA) |
GGD1 |
380 |
A |
1000 |
15 |
15 |
30 |
B |
600(630) |
C |
400 |
GGD2 |
380 |
A |
1500(1600) |
30 |
30 |
63 |
B |
1000 |
C |
600 |
GGD3 |
380 |
A |
3150 |
50 |
50 |
105 |
B |
2500 |
C |
2000 |
|
|
2.Support circuit program |
|
Design of support circuit consists of Distribution & Utilization
program and power plant program. |
|
3.Main bus |
|
Single copper bar is used when the rated current not exceeding
1500A, double copper bar bus is used when |
|
above 1500A. Faying surface
of bus adopts tin coating treatment. |
|
4.choose of electrical apparatus element |
|
a.Mainly adopts mass produced and advanced electrical apparatus
elements domestic;As RDW17, DZ20, DW15. |
|
b.HD13BX and HS13BX type rotating operation knife switch is a
special element designed by NLS to meet the |
|
requirement of GGD cabinet
unique structure, which change the mechanism operating method,
keep the advantages of |
|
old product, being a
utility model electric apparatus element. |
|
c.If better performance and
technologically advanced element is chosen according to the
customer, no |
|
manufacture or installation
difficult will arise because of good installation flexibility of
GGD cabinet. |
|
d.To improve the dynamic stability
capability of the circuit, GGD cabinet bus support adopts
special ZMJ type |
|
combined type busbar clamp
and insulation support. Bus bar clamp is thermalplastic molded
from high strength, high |
|
frame retardant PPO complex
material, which has high insulation strength, good
self-extinguish ability, unique |
|
structure, single or double
bus bar can be combined conveniently only by adjusting building
block interblock. |
|
Insulation support adopts
telescope molding structure, with low costs, high strength,
which solve the defect |
|
problems of insufficient
creepage distance. |
|
|
