ST2808 Type Live Working Protective Equipment Insulation Testing Device
1. Overview
1.1 Purpose
According to the methods required by the new State Power Development (2002) No. 777 "Regulations for Preventive Tests of Electric Power Safety Tools and Equipment", it can quickly and more scientifically and reasonably complete the power frequency withstand voltage tests for common auxiliary insulating tools such as insulating gloves, insulating boots, and insulating rubber pads.
Auxiliary insulating safety tools refer to those whose insulation strength is not to withstand the working voltage of equipment or lines, but only to strengthen the protective effect of basic insulating safety tools, to prevent contact voltage, step voltage, and leakage current arc from harming operators. They cannot be used to directly contact live parts of high-voltage equipment. Safety tools belonging to this category include: insulating gloves, insulating boots, insulating rubber pads, etc.
This instrument is mainly used for power frequency withstand voltage tests on safety tools such as insulating gloves and insulating boots, in order to determine whether these tools meet the conditions of use and ensure the personal safety of workers.
1.2 Test Basis
The "Regulations for Preventive Tests of Electric Power Safety Tools and Equipment" issued by the State Power Corporation and implemented on November 7, 2002.
2. ST2808 Type Main Functional Features
2.1 According to the new industry standard requirements, the leakage current is assessed as the test basis, which is more scientific.
2.2 According to the new industry standard requirements, insulating boots should use special electrodes without filling with water. The insulating boots that pass the test can be put into use immediately, and the service life of the insulating boots is improved.
2.3 Combined structure, movable, transportable, and easy to prepare.
2.4 It can simultaneously complete the withstand voltage test of 3 pairs (6 pieces) of insulating boots or gloves at one time, and accurately detect 6 channels of leakage current at the same time.
2.5 Automatic timing.
3. ST2808 Type Main Technical Indicators
Special electrode: ф3mm steel balls
Test voltage: AC 0—50Kv DC 0-60KV
Test current: 0—60mA
Current measurement accuracy: 0.2 class
Voltage measurement accuracy: 0.2 class
Maximum test quantity: 3 pairs/6 pieces, 6-channel current detection
Power supply: AC220V ±10%
4. ST2808 Type Usage Method
It consists of two main parts: the test host and the test bench. After unpacking the packaging boxes of the two parts, fix the test bench, and connect the grounding wires of the host and the discharge rod. Connect the control wires between the host and the high-voltage box.
During the test, fill the test object with steel balls (about 1.5-2.0 kg of metal balls for each insulating boot), then adjust the electrode rod through the locking screw so that the electrode is inserted into the insulating boot (glove) to the same position as the steel ball surface.
After the above work is completed,
Power frequency withstand voltage test:
Start the test → Install the test object → Turn on the power of the high-voltage box → Turn on the power of the host → Press Settings → Enter the setting screen, set the test voltage, leakage current, and test time. Then enter the test screen, press High Voltage On, turn on the automatic state, press Start to conduct the test, and after completion, the voltage is automatically reduced.
DC withstand voltage test:
Start the test → Remove the transformer short-circuit rod → Connect the capacitor high-voltage silicone rubber wire to the electrode → Install the test object → Turn on the power of the high-voltage box → Turn on the power of the host → Press Settings → Enter the setting screen, select DC test, set the test voltage, leakage current, and test time. Then enter the test screen, press High Voltage On, turn on the automatic state, press Start to conduct the test, after completion, the voltage is automatically reduced, the test ends → Turn off the high voltage → Turn off the host power → Turn off the high-voltage box power, then use the discharge rod to fully discharge the electrode, hang the grounding wire, remove the high-voltage silicone rubber wire and ground it, and finally remove the test object.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
