The high-voltage and high-resistance box is developed and produced based on the insulation resistance meter (megohmmeter) verification regulations and DC resistor verification regulations and other relevant documents. The device is designed with independent leakage shielding terminals and grounding terminals, which fully meet the requirements of the insulation resistance meter verification regulations and the DC resistor verification regulations. It can not only be used to calibrate various types of pointer insulation resistance meters, but can also be used as a standard for calibrating digital insulation resistance meters, insulation resistance testers, and as a DC standard high-value resistor. It has a long technical life and mechanical life.
2. Main technical parameters
. Accuracy level and working voltage (current) of the high-voltage and high-resistance box
Resistance
Accuracy level
Nominal voltage
Resistance value
Accuracy Level
Nominal Voltage/Current
. Measuring range ~, adjust fineness
. Operating environment conditions
. Reference temperature range ~ ℃
. Nominal operating temperature range ~ ℃
. Reference humidity range ~ %
. Nominal operating humidity range ~ %
. Variation limit Variation caused by changes in a single influencing quantity under reference conditions
Impact Quantity classification
Nominal use range
Allowable variation
Ambient temperature
～℃
/ %
Relative humidity
%～%< br/>%
Working voltage
(~/) Nominal voltage
%
High voltage and high resistance box resistance disk accuracy level (each resistance disk has different values)
. Insulation resistance
The insulation resistance between the circuit of the high-voltage high-resistance box and any other external metal that is not electrically connected to the circuit shall not be less than the resistance value measured at the nominal voltage.
． Insulation strength
The circuit between the high-voltage high-resistance box and the test reference ground point should be able to withstand the actual sine wave 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
. Weight<