China High Voltage Suspension Toughed Glass Insulator Manufacturer and Supplier

High Voltage Suspension Toughed Glass Insulator

Short Description:

Glass insulators do not require periodic live preventive tests on insulators during operation. This is because each damage of tempered glass will cause the damage of insulator, which is easy to be found by operators during line inspection. When the insulator is damaged, the glass fragments near the steel cap and iron foot are stuck, and the mechanical strength of the remaining part of the insulator is sufficient to prevent the insulator string from breaking off.Due to the high mechanical strength of the surface layer of glass insulator, the surface is not easy to crack. The electrical strength of glass generally remains unchanged during the whole operation period, and its aging process is much slower than that of porcelain. Therefore, glass insulators are mainly scrapped due to self damage

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Product Design Drawings

High Voltage Glass Insulator (8)

Product Art Photos

High Voltage Glass Insulator (9)

High Voltage Glass Insulator (7)

High Voltage Glass Insulator (6)

High Voltage Glass Insulator (5)

Product Technical Parameters

IEC designation		U40B/110	U70B/146	U70B/127	U100B/146	U100B/127	U120B/127	U120B/146	U160B/146	U160B/155	U160B/170
Diameter D	mm	178	255	255	255	255	255	255	280	280	280
Height H	mm	110	146	127	146	127	127	146	146	155	170
Creepage distance L	mm	185	320	320	320	320	320	320	400	400	400
Socket coupling	mm	11	16	16	16	16	16	16	20	20	20
Mechanical failing load	kn	40	70	70	100	100	120	120	160	160	160
Mechanical routine test	kn	20	35	35	50	50	60	60	80	80	80
Wet power frequency withstand voltage	kv	25	40	40	40	40	40	40	45	45	45
Dry lightning impulse withstand voltage	kv	50	100	100	100	100	100	100	110	110	110
Impulse puncture voltage	P.U	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8
Power frequency puncture voltage	kv	90	130	130	130	130	130	130	130	130	130
Radio influence voltage	μv	50	50	50	50	50	50	50	50	50	50
Corona visual test	kv	18/22	18/22	18/22	18/22	18/22	18/22	18/22	18/22	18/22	18/22
Power frequency electric arc voltage	ka	0.12s/20kA	0.12s/20kA	0.12s/20kA	0.12s/20kA	0.12s/20kA	0.12s/20Ka	0.12s/20Ka	0.12s/20Ka	0.12s/20Ka	0.12s/20Ka
Net weight per unit	kg	2.1	3.6	3.5	4	4	4	4	6.7	6.6	6.7

Product advantages and disadvantages

1. Glass insulator

Advantages: the mechanical strength of the surface layer of glass insulator is high, the surface is not easy to crack, and the aging speed is slow; It can cancel the live periodic preventive test of insulators during operation, and there is no need to carry out “zero value” detection during operation, so the operation and maintenance cost is low.

Disadvantages: due to the transparency of glass, it is easy to find small cracks and various internal defects and damages during appearance inspection.

2. Ceramic insulator

Advantages: good chemical stability and thermal stability, strong anti-aging ability, good electrical and mechanical properties, and flexible assembly.

Disadvantages: defects are not easy to be found, and they begin to be found only after several years of operation; The zero value detection of ceramic insulators must be carried out one by one on the tower, which requires a lot of manpower and material resources; The probability of accidents caused by lightning stroke and pollution flashover is high.

3. Composite insulator

Advantages: small size, easy maintenance; Light weight and easy installation; High mechanical strength, not easy to break; Excellent seismic performance and good pollution resistance; Fast production cycle and high quality stability.

Disadvantages: anti aging capability is not as good as ceramic and glass insulators, and the production cost is higher than that of ceramic and glass insulators.

Scope of use and specification

1 scope
This standard specifies the general technical requirements, selection principles, inspection rules, acceptance, packaging and transportation, installation and operational maintenance, and operational performance testing for ac overhead line insulators with nominal voltages above 1000V.

This standard is applicable to disk-type suspended porcelain and glass insulators (insulators for short) used in ac overhead power lines, power plants and substations with nominal voltage above 1000Y and frequency 50Hz. The altitude of the installation site must be lower than 1000m, and the ambient temperature must range from -40 ° c to +40 ° c. 2 Normative reference files

The following documents contain provisions which are referred to in this International Standard. All subsequent amendments (excluding errata) or revisions to dated referenced documents do not apply to this standard; however, parties to agreements under this Standard are encouraged to study the availability of the latest version of these documents. For undated references, the latest version applies to this standard. GB311.1-1997.
Insulation coordination for high voltage transmission and transformation equipment (NEQ IEC 60071-1∶1993) GB/T772-2005

Technical specifications for porcelain high-voltage insulators GB/T775.2 — 2003
Insulators – Test methods – Part 2: Electrical test methods GB/T775.3-2006
Insulators – Test methods – Part 3: Mechanical test methods GB/T 1001.1 2003
Overhead line insulators of nominal voltages above 1000V – part 1; Definitions, test methods and criteria for ceramic or glass insulator elements for use in alternating current systems (MOD IEC 60383-1) GB/T 2900.5 2002

Electrical terminology for insulating solids, liquids and gases [EQV IEC60050 (212) : 1990] GB/T 2900.8 1995
Electrical terminology insulators (EQV IEC 60471) GB/T 4056
Structure and dimensions of suspension insulators for high voltage lines (EQV IEC 60120) GB/T 4585-2004
Manual pollution test for high voltage insulators for use in ac systems (IDT IEC 60507; 1991). GB/T7253
Insulators – ceramic or glass insulator elements for use in ac systems for overhead line insulators with nominal voltages above 1000V – characteristics of disk-type suspension insulator elements (mod IEC 60305∶1995)

DLT 557-2005

Impact breakdown testing in air for high voltage line insulators — Definitions, test methods and criteria (MOD IEC 61211:2002) DLT 620
Overvoltage protection and insulation coordination for AC electrical installations DLT 626-2005
Test practice for degraded disc suspension insulators DL/T 812 — 2002
Test method for arc requirements for string insulators for overhead lines with nominal voltages above 1000V (eqv IEC 61467:1997) DL/T 5092-1999
Technical specification for design of 110kV ~ 500%kV overhead transmission lines JB/T3567-1999
Test method for radio interference of high voltage insulators JB/T 4307-2004
Cement cement JB/T 5895 — 1991 for insulator adhesive installation
Guidelines for use of insulators in polluted areas JB/T 8178–1995
Specification for iron caps of suspension insulators – Locking pins for ball-and-socket connections of insulator string elements JB/T 8181-1999
Steel pin JB/T 9677-1999 for disc-type suspension insulators
Exterior quality of glass parts for disc-type suspension glass insulators
JB/T9678-1999