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I.Uses and characteristics of the instrument
The reliable and effective connection between the grounding down conductor of the power
equipment and the ground network is the fundamental guarantee for the safe operation of
the equipment. The grounding down conductor is the connection part of the power
equipment and the grounding grid. During the long-term operation of the power equipment,
the connection may be affected by damp and other factors, and the contacts may be
corroded or even broken. The resistance of the connection point of the grounding grid is
increased, which cannot meet the requirements of the electric power regulations, so that
there are hidden dangers in the operation of the equipment, and in serious cases, the
equipment will lose ground. Therefore, in the "Twenty-Five Key Requirements to Prevent
Major Accidents in Electric Power Production", it is clearly stated that the conduction test
of the down conductor of the grounding device should be carried out once a year.
The HZ-3510 grounding continuity tester is a portable tester with a high degree of
automation developed by our company. It is used to measure the continuity resistance
between the ground conductors of various power equipment in the substation. The
instrument is controlled by a high-performance single-chip microcomputer, which can
realize the intelligent test process. It has small size, convenient carrying, simple operation,
high precision, fast test speed, good retestability, and intuitive reading. It is an ideal
special instrument that meets the requirements of regulations.
II.Main Specifications
Item
Technical indicators and parameters
Remark
Test current
AUTO
、
1A
、
3A
、
5A
、
10A
Measuring range
0.8mΩ-0.8Ω
(10A)
1mΩ-2Ω
(5A)
5mΩ-3Ω
(3A)
10mΩ-10Ω
(1A)
Min resolution
0.1μΩ
Accuracy
±(0.5%±2dgt)
Display
LCD
Resistance display effective
digits are 4 digits
