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These Major Megger® Extended Range Insulation
Resistance Testers are the ideal instruments when high
ranges are needed for measuring insulation resistance.
Both provide excellent test voltage regulation and an
external guard terminal to eliminate surface leakage
current from the measurement. The instruments are all
electronic; they generate a regulated dc high voltage and
use low-zero-drift, high-accuracy circuits, with high current
sensitivity. Designed for portability, each is enclosed in a
molded, impact-resistance, flame-retardant case.
Both instruments are protected for connection to power
distribution systems up to 300 V Line-Ground and 500 V
Line-Line for Installation Category III. This relates to
transient overvoltage likely to be found in fixed installation
wiring.
Documents:
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DataSheet:
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