GB 1985-1989 AC high voltage isolating switch and grounding switch GB1985-1989 standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
AC high-voltage disconnectors and earthing switches
Electrical standard IEC129 "AC isolating switch and grounding switch" (1984 edition). 1Subject content and scope of application
This standard specifies the rated parameters, design and structure requirements for AC high-voltage isolating switches and grounding switches. This standard applies to indoor and outdoor AC high-voltage isolating switches and grounding switches (hereinafter referred to as isolating switches and grounding switches) with a rated voltage of 3 to 500kV and a frequency of 50Hz, as well as their operating mechanisms and auxiliary equipment. The special requirements for isolating switches and grounding switches used in decentralized combination appliances, closed combination appliances, metal-enclosed switchgear and other electrical appliances are stipulated by the corresponding product standards.
2 Operating environment conditions
According to Chapter 3 of GB11022 "General Technical Conditions for High Voltage Switchgear". 3 Terminology
The terminology used in this standard is in accordance with the provisions of GB2900.1 "Basic Terminology of Electrical Terminology" and GB2900.20 "High-voltage Switchgear of Electrical Terminology".
3.1 Contact area (for single-column isolating switch and earthing switch) is a space area that defines different positions of the static contact in order to ensure correct contact between the static contact and the moving contact. 3.2 Terminal static pull force
The static pull force of the terminal block of the isolating switch and grounding switch is the maximum static pull force exerted on the terminal block by taking into account wind force, ice and snow covering, self-weight of the conductor, tension and electric power.
4 Rated parameters
4.1 Rated voltage
According to GB11022 Article 5.1.
4.2 Rated insulation level
According to GB11022 Article 5.4.
Isolating switches with a rated voltage of 330kV and above are divided into Class A and Class B according to the rated operating impulse withstand voltage between their breaks. For details, see Table 3 in Article 5.4 of GB11022. The ratings in column 8 apply to class A isolating switches, and the ratings in column 9 apply to class B isolating switches).
The rated insulation level of the isolating switch used for grounding the neutral point of the transformer is shown in Table 1. The Ministry of Mechanical and Electronics Industry of the People's Republic of China approved the implementation on 1989-10-01 on 1988-08-10
rated voltage
35
63
110
220
330
500
4.3 rated frequency
maximum voltage
40.5
69
126
252
363
550
According to GB11022 Article 5.3.
4.4 rated current and temperature rise
GB1985—89
Table 1
Transformer neutral point grounding method
dead grounding
not dead Grounding
Dead grounding
Not dead grounding
Dead grounding
Not dead grounding
Lightning impulse withstand voltage
(Full wave 1.2/50 )
(peak value)
185
325
250
185
400
180
550
180
325
kv
1min power frequency withstand voltage
voltage (dry test and wet test)
80| |tt||140
95
85
200
85
230
85
140||tt ||The rated current and temperature rise of the isolating switch are in accordance with Article 5.2 of GB11022, and in accordance with GB763 "Heat generation of AC high-voltage electrical appliances during long-term operation".
4.5 Rated short-time withstand current (rated thermal stable current) According to Article 5.5 of GB11022, if the grounding switch and the isolating switch are combined into one, the rated short-time withstand current of the grounding switch should be equal to that of the isolating switch. The specified value; according to actual needs, it can also be lower than the specified value of the isolating switch. The specific value is specified by the product technical conditions.
4.6 Rated peak withstand current (rated dynamic stability current) is in accordance with Article 5.7 of GB11022. If the grounding switch and the isolating switch are combined into one, the rated peak withstand current of the grounding switch should be equal to the specified value of the isolating switch; according to actual needs, it can also be lower than the specified value of the isolating switch. The specific value is specified by the product technical conditions. 4.7 The rated short-circuit duration (rated thermal stabilization time) is in accordance with Article 5.6 of GB11022.
4.8 The rated voltage of the closing and opening devices and the auxiliary circuit power supply shall be in accordance with Article 5.8 of GB11022.
4.9 The rated frequency of the operating mechanism and auxiliary circuit power supply shall be in accordance with Article 5.3 of GB11022.
4.10 The rated pressure of the compressed air source for operation shall be in accordance with Article 5.9 of GB11022.
4.11 Rated short-circuit making current
For an earthing switch with rated short-circuit making capacity, it should be able to make the rated short-circuit making current at the highest voltage, and its value is equal to the rated peak withstand current .
4.12 Rated contact area
Single-column isolating switches and earthing switches should be able to operate within their rated contact area. See Figure 1, Figure 2 and Table 2 for the rated contact area of ??the isolating switch and grounding switch of the head. The rated contact area of ??the wire-supported static contact
shaft
switch and grounding switch is shown in Figure 3 and Table 2. Table 3 specifies the switch or connector
1.2
the rest position of the conductor when there is no wind or ice
GB1985-89
the limit position when there is wind||tt| |Static contact when no ice
Position at minimum temperature without ice
Position at minimum temperature with ice,
Position at minimum temperature without ice
Yes The position when the ice amount is low and the temperature is:
The resting position at normal temperature
The resting position of the conductor when there is no wind and ice
7 The limit position when there is wind and ice|| tt||Static contact when there is ice
-L/2-
Position at maximum temperature
Tightening device
Position at maximum temperature||tt ||Rated contact area
Limit position when there is wind and ice
Figure 1 Rated contact area using soft conductor to support static contact (static contact is parallel to overhead conductor)||tt| |L - horizontal displacement perpendicular to the direction of the overhead conductor; S - vertical displacement; U - displacement along the direction of the overhead conductor
The static position of the conductor when there is no wind or ice
GB1985--89| |tt||Limit position when there is wind
Static contact when no ice
S
Static position at normal temperature
Position at minimum temperature without ice
Position at the lowest temperature with ice
Position at the lowest temperature without ice
Position at the lowest temperature with ice
Position at the highest temperature||tt| |The resting position of the conductor when there is no wind and ice
The limit position when there is wind and ice
-/2
The position at the maximum temperature
rated contact area| |tt||Limit position when there is wind and ice
Figure 2 The rated contact area of ??the static contact supported by a soft conductor (the static contact is perpendicular to the overhead conductor)
L - perpendicular to the overhead conductor Horizontal displacement in the direction; S - vertical displacement; U·Displacement along the direction of the overhead conductor
Static contact when there is ice
Tightening device
Rated voltage
kv
63
110
220
330
500
rated voltage
kv
63
110
220
330
500
GB1985-89
Table 2 Rated contact area of ??static contacts supported by soft wires L
m
0.30
0.35
0.50
0.50
0.60
U/
s
m
0.20
0.20
0.25
0.30
0.40
Figure 3 Rated contact area of ??static contact supported by hard wire L - horizontal displacement perpendicular to the direction of the overhead wire; S - vertical displacement; U - displacement along the direction of the overhead wire
Rated contact area table 3 for supporting static contacts with hard wires
L
m
0.10
0.10
0.15|| tt||0.15
0.20
4.13 Rated static tension force of terminal block (see Figure 4 and Figure 5) s
m
0.10
0.10|| tt||0.15
0.15
0.20
U
m
0.20
0.25
0.30||tt| |0.35
0.50
U
m
0.10
0.10
0.20
0.20
0.25
Isolating switches and grounding switches should be able to close and open and be reliably in place when they bear the rated static tension of their terminals. For isolating switches and earthing switches that do not bear significant terminal static tension, there is no need to specify terminal static tension. See Table 4 for the rated static pulling force (in the horizontal direction) of the isolating switch terminal block. GB1985-89
Fa
Figure 4 Example of double-column isolating switch applying rated static pulling force to terminal block E
Figure 5 Example of single-column isolating switch applying rated static pulling force to terminal block Rated voltage
kv
10
35, 63
110
220
330
500
rated Current
A
≤1250
≥1600
≤1250
1600~2500
≥3150
≤1250
1600~2500
≥3150
GB1985-89
Table 4
Double-column and three-column isolating switches
(see Figure 4)
Longitudinal static tension force
Fa and F2
N
500
400
500
750| |tt||1000
800
1000
1500
1500
2000
.750
750|| tt||750
1000
1250
1000
1500
2000
2000
3000||tt| |Transverse static tension
Fht and Fb2
N
170
130
170
250
330|| tt||270
330
500
500bzxz.net
660
250
250
250||tt| |330
420
330
500
660
660
1000
Single column isolation switch|| tt|| (See Figure 5)
Longitudinal static tension force
F and Fa2
N
800
800
800|| tt||1000
1250
1250
1600
2000
2000
2000
1600||tt| |2000
3000
3000
3000
lateral static pulling force
Fa and Fb2
N
200|| tt||200
200
300
400
400
500
770
770||tt| |770
500
770
1200
1200
1200
Note: ① A grounding switch integrated with an isolating switch. Regardless of the static tension of the terminals, the static tension of the terminals of the grounding switch that is not integrated with the isolating switch is determined by the user and the manufacturer. ② When the static pulling force of the terminal required by the user is greater than the value specified in Table 4, the solution can be negotiated with the manufacturer. 4.14 The rated maximum operating torque required for manual operation is 300N·m for outdoor products; for indoor products: the rated current is less than and equal to 1250A, 200N·m, and the rated current is greater than and equal to 1600A, which is under consideration.
4.15 Isolating switch opening and closing capacitive and inductive small currents are under consideration
4.16 Isolating switch opening and closing circulating currents
are under consideration.
4.17 Performance when passing the rated peak withstand current and rated short-time withstand current 4.17.1 The isolating switch is in the closed position and withstands the rated peak withstand current and rated short-time withstand within the rated short-circuit duration. When electric current is applied, it should not cause:
mechanical damage to any parts;
a.
b.
contact separation;
c.| |tt||The temperature rise that may damage the insulation is the temperature rise after withstanding the rated peak withstand current and the rated short-time withstand current plus the maximum temperature obtained by passing the rated current for a long time. After passing these currents, the isolating switch should Meet the relevant provisions of Chapter 7 of GB2706 "AC High Voltage Electrical Dynamic and Thermal Stability Test Methods".
When the earthing switch is in the closed position and withstands the rated peak withstand current and the rated short-time withstand current within the rated short-circuit duration, 4.17.2
shall not cause:
a.
Mechanical damage to any parts;
b. Contact separation or firm welding;
c, temperature rise that may damage the insulation.
GB1985-89
Note: If the grounding switch can continue to operate under the conditions specified in Chapter 7 of GB2706, slight welding of the contacts is allowed. 4.18 Closing and short-circuit performance of the grounding switch
A grounding switch with rated short-circuit closing capacity should meet the following requirements when closing a short circuit. 4.18.1 There will be no excessive signs of damage during operation and the safety of the operator will not be endangered. Metal particles that may impair its insulation level should not be ejected beyond the limits specified by the manufacturer.
4.18.2 After completing the test specified in Article 6.8 of this standard, the mechanical parts and insulators of the earthing switch should be basically the same as before the test.
4.18.3 After completing the test specified in Article 6.8 of this standard, in order to restore the grounding switch to the original state specified by the manufacturer, the grounding switch needs to be inspected before being put back into use. Note: Under the conditions specified in Chapter 7 of GB2706, using rated operating pressure or operating voltage, the grounding switch should be able to operate, but the contact should be allowed to have slight welding. 4.19 See Table 5 for the parameter coordination of rated voltage, rated current, rated short-time withstand current and rated peak withstand current. Table 5 Rated parameter coordination table
rated voltage
kv
3, 6, 10
35, 63
rated short time
Withstand current
kA
(1.6)
3.15
(6.3)
8
12.5
16| |tt||(20)
25
(31.5)
40
50
3.15
(6.3)||tt ||8
12.5
16
25
(31.5)
40
rated peak
withstand current
kA
(4)
8
(16)
20
31.5
40
(50)
63
(80)
100
125
8||tt ||(16)
20
31.5
40
63
(80)
100
200| |tt||200
200
400
400
400
400
400
400||tt ||400
630
630
630
630
630
630
630
630
630
630
630
風
1250
1250
1250
定| |tt||电
A
1250
1250
1250
1250
1250
1250||tt ||1250
1250
1250
1250
1250
1600
1600
1600
1600
1600
1600
1600
1600
1600
1600
流
2000| |tt||2000
2000
2000
2000
2000
2000
2500
2500||tt ||2500
2500
2500
2500
2500
3150
3150
3150
3150
3150
4000
4000
4000
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