Shenzhen Century Classic Testing Instrument Co., Ltd.

1. Overview The high-voltage and high-resistance box is a standard instrument for testing insulation resistance meters (megohmmeters). The upper limit of measurement is &, which is the highest ohm value among similar domestic products. This device is designed with an independent leakage shielding terminal, and there is no obvious instability, short circuit or open circuit during the measurement process. This device meets the requirements of the insulation resistance meter calibration regulations and DC resistors. It can also be used as a standard for calibrating digital megohmmeters and insulation resistance testers. It can also be used as a DC standard high-value resistance box. Has a long technical life. This device adopts a patented rolling high-voltage switch. After rotating 10,000 times, the contact resistance can still meet the requirements. Has a long mechanical life.
2. Main technical parameters
Accuracy level and working voltage (current) of the high-voltage and high-resistance box&


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Environmental conditions for use
Reference temperature range: ~℃&

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Nominal operating temperature range: ~℃&

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Reference humidity range: ~%
Nominal operating humidity range: ~%
Variation limit: at reference Under the conditions, the variation caused by the change of a single influencing quantity
Influence quantity type
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★ is the accuracy level of the resistance disk of the high-voltage and high-resistance box
Insulation resistance: the circuit and circuit of the high-voltage and high-resistance box The insulation resistance between any other external metals not electrically connected shall have a resistance value of not less than & measured at nominal voltage.
Insulation strength: The circuit between the high-voltage high-resistance box and the reference ground point for testing should be able to withstand the actual sinusoidal AC voltage with a frequency of ~ and last for a long time without breakdown or arcing.
The residual resistance at the output end of the high-voltage and high-resistance box should be <.&, and its variation should be <.
Overall dimensions: &
Weight: