Eng
Standard Insulator
 
Product Insulator
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:: LINE-POST INSULATOR ::
Linepost57-2 Linepost57-3

Note: 1. All dimensions are in millimeter.
  2. Dimension not specifying tolerance are only reference.
  3. Top and side wire-groove shall seat a 50 mm diameter mandrel.
STANDARD
TISI 1077
ANSI C29.7
CLASS 57-2 CLASS 57-3
DIMENSION Leakage distance min., mm 559 737
  Dry arcing distance min., mm 241 311
MECHANICAL VALUE Cantilever strength, kN 12.5 12.5
Cantilever proof load, kN 5 5
ELECTRICAL VALUE Low-frequency dry flashover,kV 110 125
Low-frequency wet flashover,kV 85 100
Critical- impulse flashover,positive,kV 180 210
Critical- impulse flashover,negative,kV 205 260
RADIO INFLUENCE
VOLTAGE DATA
Low-frequency test voltage,
rms to ground,kV
22 30
Maximum RIV at 1000 kHz,
Radio freed, microvolt
100 200
  Weight of one insulator,kg 9 12.2
Color of insulator BROWN BROWN