|We producing and offers a wide variety of high voltage surge|
arresters, metal oxide gapless arresters designed to protect
transformers, switchgear, and other equipment from switching
and lightning surges. These arresters meet or exceed all
requirements of the most current IEC standard and can be
selected to match a range of contamination and energy
requirements. Surge arresters complete our reliable product
solutions designed for fault free distribution of electricity.
It should be installed parallel (between the line and earth) to
the transformer or cable terminations, or other objects that
·In comparison to equivalent porcelain-housed arresters, these
polymer housed gapless arresters are typically half the weight.
This makes transportation, handling and installation much easier.
·The single-unit, high voltage designs provide improved
contamination performance over multi-unit designs.
·Closer spacing Smaller line end castings and smaller
grading rings allow closer phase-to-phase spacing.
·Zinc: oxide varister blocks are centered and restrained with tightly
woven fiberglass filament strands impregnated with epoxy resin.
For non-catalog polymer arresters that require higher creepage or
special application please consult TANHO Electrical Equipment
|Block Routine Tests:|
·Physical Inspection : Visual inspections are performed at
several steps of the block manufacturing process.
·Rated Energy Test:This procedure confirms the energy
capability of each zinc oxide disc element.
·Residual Voltage Test: Every block undergoes an 8/20
current wave impulse to verify its V-I characteristics.
MOV Block Batch QA Tests:
·Square Wave Energy Test : Performed on a 5 disc sample
from each batch, this test is performed to quantify the batch
·High Current Test : Each sample is subjected to high
current discharges of the same polarity to ensure high
·A/C Life Test : The discs are placed under test conditions
for a minimum of 1000 hours to verify performance.
|Arrester Routine Tests:|
·Physical Inspection: Every molded rubber part, block, wrap
module, brackets and completed unit is visually examined to reject
·A/C Reference Voltage Test: This test measures the voltage
once a predetermined maximum peak current is reached.
·Partial Discharge Test: This test ensures that the partial
discharge level of the arrester does not exceed a level of 10 pC.
·Residual Voltage : Tested on individual blocks
Arrester Type Tests:
·Testing Compliant with GB/T8952-2005
Insulation withstand tests on housing
Residual voltage tests
Long-duration current impulse withstand
Operating voltage tests
Short circuit current tests
Internal partial discharge tests
INSULATED OVER HEAD LINES CONNECTOR
DROP OUT FUSE,SWITCH DISCONNECTOR