Baoding Mingrui Optoelectronics Technology Co.Ltd

General product information

1.Technology Parameters

Generator capacity(MW)
100/125
200
300
600
900/1000

Generator nominal voltage(kV)
10.5
13.8
15.75
18
20
20
24
24
27

Expected loop single-phase grounding max. capacitance current(A)
4
5
6
8
10

Grounding transformer primary side voltage(kV)
10.5/
13.8/
15.75/
18/
20/
20/
24/
24/
27/

Grounding transformer

secondary side voltage (kV)
0.22
0.22
0.22
0.22
0.22

Grounding transformer nominal capacity(kVA)
30
30
50
50
63

Secondary side resistance value (?)
1.0
0.8
0.5
0.4
0.3

Grounding protection tap voltage(kV)
0.1
0.1
0.1
0.1
0.1


2.Operation Conditions

Use condition:
indoor

Feature:
Neutral grounding resistor

Altitude high:
Less than 3000m

Ambient temperature:
-40 centigrade ~~+40 centigrade

Rated frequency:
58~62Hz and 48~52 Hz

Air grade:
Clean, without corrosion gas and dust

Relative humidity:
Not more than 95%

(25 centigrade)


3.Technology Standar

DI/780 -2001
distribution system neutral grounding resistor

GB6450
dry-type power transformer

DI/T620-1997
Overvoltage protection and insulation coordination of AC electrical equipment

GB/T16927-1997
high voltage testing technology

GB1208-1997
current transformer

GB4208-93
case protection grade

IEEE32-1972
Technologies ,terms, and experiments of neutral grounding equipments

GB311.1-1997
insulation coordination of high voltage transmission and distribution device

DL/T593-1996
common ordering technical conditions of high voltage switch device



GB50150-1991
standards of electrical equipment handing-over and experiment of electrical device installment project




4.Parameters of Grounding Transformer

Insulation Grade: H

Cooling-down Method: AN

Temperature Rise =300 M?, low voltage to grounding >=100 100 M?

5.To serve you better, please kindly offer following information when ordering

1 generator rated voltage, transformation ratio of grounding transformer, resistance value;

2 insulation form of grounding transformer;

3 transformation ratio of current transformer ;

4 color of cabinet, wiring from the top or bottom;

5 time of current flowing-through

6 material and color of box, IP protective grade, colour and installation location.





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