GZX92D type high voltage and high resistance box standard adjustable resistance box

1. Overview The D-type high-voltage and high-resistance box is a standard instrument for testing insulation resistance meters (megohmmeters). The upper limit of measurement is the highest ohm value among similar domestic products. This device is designed with an independent leakage shielding terminal, so 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 the requirements of 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 and the contact resistance can still meet the requirements after being rotated ten thousand times. Has a long mechanical life.
2. Main technical parameters
. Accuracy level and working voltage (current) of the high-voltage and high-resistance box
<= dd resistance





Accuracy level





Nominal voltage






<= dd resistance




Accuracy level
.
.
.
.
Nominal current
.



. Operating environment conditions
. Reference temperature range: ~℃
. Nominal operating temperature range: ~℃
. Reference humidity range: ~%
. Nominal operating humidity range: ~%
. Variation limit: by a single influencing quantity under reference conditions Variation caused by changes
<= dd Influence quantity
Nominal use range
Allowable variation
Ambient temperature
~℃
/ %
Relative humidity
~%
/ % %
Operating voltage
(~/) Nominal voltage
/ % %
★ It is the accuracy level of the resistance disk of the high-voltage high-resistance box
. 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 is measured at the nominal voltage. The resistance value is not less than.
. 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＜.
. Dimensions:
. Weight: ＜