No data

No data

产品中心

U100CN Ground Wire Glass Insulator
U100CN Ground Wire Glass Insulator
U100CN Ground Wire Glass Insulator
U100CN Ground Wire Glass Insulator

昆明U100CN Ground Wire Glass Insulator

Ground‑wire toughened glass insulator, also known as earth‑wire type disc suspension toughened glass insulator, is specially developed for overhead transmission line ground‑wire (earth wire) system. It provides electrical insulation between overhead ground‑wire and metal tower, meanwhile bears mechanical tension from ground‑wire, wind load, ice‑coating and line vibration. When lightning strikes ground‑wire, it enables lightning current discharging to tower; under normal operation, it isolates ground‑wire from tower to implement ground‑wire insulation mode for line anti‑lightning performance improvement. Typical models: U70CN, U100C (main strength grades 70 kN, 100 kN)。

类别：

昆明Ground Wire Glass Insulator

024-89550577

联系我们

产品描述

IEC Type

Diameter

D(mm)

Spacing

H(mm)

Creepage

Distance

(mm)

Size of

Coupling

(mm)

Mechanical

Failing

Load(kN)

Mechanical

Routine

Test(kN)

Power Frequency

Withstand Voltage

（dry）(kV)

Frequency

Puncture

Voltage (kV)

Net Weight

Per Unit

(kg)

U70C20021022016C7035301104.5
U70CN20021022016C7035301104.5
U100C20021022016C10050301104.5
U100CN20021022016C10050301104.5
U120C20021022016C12060301104.5
U120CN20021022016C12060301104.5

1. Brief Overview

Ground‑wire toughened glass insulator, also known as earth‑wire type disc suspension toughened glass insulator, is specially developed for overhead transmission line ground‑wire (earth wire) system. It provides electrical insulation between overhead ground‑wire and metal tower, meanwhile bears mechanical tension from ground‑wire, wind load, ice‑coating and line vibration. When lightning strikes ground‑wire, it enables lightning current discharging to tower; under normal operation, it isolates ground‑wire from tower to implement ground‑wire insulation mode for line anti‑lightning performance improvement. Typical models: U70CN, U100C (main strength grades 70 kN, 100 kN)。

2、Structure & Materials

Same cap‑and‑pin assembly structure as conventional disc suspension glass insulator, three core components bonded by high‑quality cement mortar：

  1. Toughened glass shell：Thermally tempered borosilicate glass, forms surface compressive stress after quenching; special optimized shed profile for ground‑wire application, compact dimension, lightweight, good self‑cleaning smooth surface。
  2. Hot‑dip galvanized iron cap：Forged steel cap, ball‑socket coupling interface per IEC 60120, anti‑corrosion hot‑dip galvanizing treatment。
  3. Hot‑dip galvanized steel pin：Forged steel pin; soft gasket and tar coating applied at cement contact area to buffer thermal expansion‑contraction stress, prevent mechanical damage under temperature cycling。

Structural difference vs conductor‑side glass insulator: Ground‑wire type is optimized for ground‑wire working condition, with special arc‑resistance gap design for lightning discharge, lower required creepage distance than live‑line insulator, compact size and lighter weight。

3. Key Performance Characteristics

Mechanical Performance

  • High mechanical failing load, withstand ground‑wire static tension, wind‑ice load, aeolian vibration and impact load in long‑term outdoor service。
  • Good thermal‑mechanical shock resistance, adapt to wide ambient temperature range (−40 ℃ ~ +80 ℃).

Electrical Performance

  1. Insulate ground‑wire from tower under normal operating condition; form discharge gap for lightning surge, safely release lightning current to tower when lightning strikes ground‑wire。
  2. Zero‑value self‑breaking feature: Once insulation degrades to zero‑value defect caused by lightning, aging or internal flaw, glass shell will shatter automatically. Fault insulator can be visually detected from ground or helicopter patrol, no need climbing tower for insulation resistance measurement, greatly reduce O&M workload。
  3. Smooth glass surface, anti‑tracking, anti‑arc erosion, low radio interference level, good anti‑pollution performance, rain self‑cleaning effect reduces pollution accumulation。
  4. Stable dielectric property, excellent anti‑aging performance, long service life for overhead line outdoor environment。

Application Advantages

✅ Fault visible by self‑breakage, easy inspection; ✅ No routine resistance measurement required; ✅ Compact structure, light weight, convenient installation; ✅ Resist UV, moisture, salt fog and industrial contamination; ✅ Suitable for lightning‑prone area, high‑altitude area, coastal polluted transmission lines。

上一条

昆明U70CN Ground Wire Glass Insulator

昆明U120CN Ground Wire Glass Insulator

下一条