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Measurement devices  

Measurement devices

 
 
 
 

154KV class/ 275KV class special high voltage electroscope

 

154KV class/ 275KV class special high voltage electroscope

 

 

This is a contact type electroscope for 154KV class and 275 KV class power transmission lines. It will detect the presence of voltage on a line to be tested, simply by making contact with the electrodes. The results of the test can be shown on the operator’s display device using sound and light.

 
 

Main performance features

 
Standard 154kV class 275kV class
Standard operating voltage Nominal voltage 154kV Nominal voltage 275kV
Detection voltage 12kV±2kV 30kV±3kV
No. of insulation pipe levels 4 5
Total length 5200mm or more 6000mm or more
Effective insulation length 4000mm or more 4800mm or more
Length in storage Approx. 1700mm approx. 1700mm
Weight 2.7kg 3.5kg
Insulation strength Electrodes placed at a distance of 30cm from the insulation pipe surface, AC75kV applied at 5 min. intervals, and no irregularities.
  At this point, the leak current should be 50μA or less.
Power supply Detection unit 9V, manganese battery 
006P
Display
 
 

MS-2 type, 3 type faulty isolator detector (acoustic pulse type)

 

MS-2 type, 3 type faulty isolator detector (acoustic pulse type)

 

 

This device detects faulty isolators on power transmission lines. It makes a direct reading of the isolator’s burden voltage, so even on power transmission lines with many isolator couplings, an individual isolator’s standard burden voltage can be compared according to its location, and an accurate judgement made as to whether the isolator is faulty or not.

 
 

Main performance features

 
Item MS-2 type MS-3 type
Detection voltage range AC1kV to 20kV AC2kV to 30kV
Margin of error ±10% or less ±10% or less
Voltage between horns AC30kV AC30kV
Power supply 2 lithium batteries CR123A 2 lithium batteries CR123A
Battery check Yes Yes
Effective insulation
length of insulation pip
2.6m or more 5.3m or more
Insulation strength Electrodes placed at a distance of 30cm from the pipe surface,
AC75kV applied at 1 min. intervals, leak current should be 50μA or less.
Electrodes placed at a distance of 30cm from the pipe surface,
AC75kV applied at 1 min. intervals, leak current should be 50μA or less.
 
 

500kV power transmission line electroscope

 

500kV power transmission line electroscope

 

 

This device does not make direct contact with the power transmission lines, but measures and detects the voltage distribution of up to three isolators on the pylon side. The insulation pip of the control panel is very short, making the device light and very easy to operate. It has a self check function, so when there is no voltage on the transmission lines, the device can be made to contact the isolator and display a (green) safety lamp.

 
 

Main performance features

 
Item 500kV 500kV (designed to 1000kV)
Lamp display Detection voltage
Green 0 to 1.8kV 0 to 1.0kV
Yellow 1.8kV to 3.0kV 1.0kV to 3.0kV
Red 3.0kV or more 3.0kV or more