I.Summary of Instrument
Dielectric loss measurement is a very basic method in insulation test, which can effectively find out the whole damp deterioration and local defects of insulation of electrical equipment. It is widely used in electrical manufacturing, electrical equipment installation, handover and preventive test. The measurement of dielectric loss of transformer, mutual inductor, reactor, capacitor, bushing and lightning arrester is the most basic method to measure its insulation performance. The dielectric loss tester has broken through the traditional bridge measurement method, adopting frequency conversion power supply technology, using single chip microcomputer and modern electronic technology to carry out automatic frequency conversion, mode/number conversion and data operation. Strong anti-interference ability, fast test speed, high precision, automatic digitization, easy operation; Power supply adopts high-power switching power supply, output 45Hz and 55Hz pure sinusoidal wave, automatically pressurize, can provide up to 10 kv voltage; Automatic filter 50Hz interference, suitable for substation and other electromagnetic interference large field test. Widely used in the power industry transformer, mutual inductor , casing, capacitor, lightning arrester and other equipment dielectric loss measurement.
II.Security Measures
1. Read this manual carefully before using this instrument.
2. The operator of the instrument should have general knowledge of the use of electrical equipment or instruments.
3. This instrument can be used both inside and outside, but it should be kept away from places such as rain, corrosive gas, excessive concentration of dust, high temperature and direct sunlight.
4. Instrument should avoid violent vibration.
5. The maintenance, care and adjustment of the instrument should be carried out by professionals.
6. Before any connection, the grounding terminal of the instrument must be reliably connected with the earth with an earth cable.
7. Due to the high voltage generated by the test equipment, the tester must strictly follow the safe operation procedures and prevent others from contacting the high-voltage components and circuits. Direct test personnel must fully understand the high-voltage test circuit, and instrument operation points. Non-engaged testers must stay away from the high-pressure test area, which must be clearly marked with fences or ropes, warning signs, etc.
8. The adjustment, repair and maintenance of the instrument must be carried out without electricity. If it must be live, the operator must be very familiar with the high voltage dangerous parts of the instrument.
9. When the fuse is damaged, the same insurance must be replaced. It is forbidden to replace different types of insurance or directly short circuit the insurance.
10. When the instrument fails, turn off the power switch and wait for one minute before checking.
III.Technical Indicators
Accuracy： Cx: ±（readings×1%+1pF）
tgδ: ±（readings×1%+0.00040）
Anti-interference index: frequency conversion anti-interference, can still achieve the above accuracy under the interference of 200%.
Capacitance range：
Internal high voltage：3pF～60000pF/10kV 60pF～1.5μF/0.5kV
External high voltage： 3pF～1.5μF/10kV 60pF～30μF/0.5kV
Resolution: up to 0.001 pF, 4-bit significant digits
Tgδ range： no limi,The resolution is 0.001%. The capacitance, inductance and resistance can be identified automatically.
Test current range：10μA～5A
Internal high voltage：
Setting Voltage Range：0.5～10kV
Resolution: 1V Accuracy: ±(1.5%×reading+10V)
Maximum output current：200mA
Boost and drop voltage mode: the voltage is set at will. Such as 5123 v.
Test frequency: 40-70Hz single frequency can be set at will. For example, 48.7 Hz.
50± 0.1Hz to 50±10Hz automatic dual frequency conversion optional setting.
60± 0.1Hz to 60±10Hz automatic dual frequency conversion optional setting.
Frequency accuracy: ±0.01Hz
External high voltage: maximum test current 5A, power frequency or frequency conversion of 40-70Hz during positive connection
Maximum test current 10kV/5A, power frequency or frequency conversion 40-70Hz
CVT self-excitation method low voltage output: output voltage 3～50V, output current 3～30A
CVT ratio measurement:
Ratio accuracy: ±reading × 1% Ratio measurement range: 10～99999
Phase accuracy: ±0.1° Phase measurement range: 0～359.9°
Measurement time: about 40s, related to measurement method
Input power: 180V ~ 270VAC, 50Hz±1%, municipal or generator power supply
Computer interface: standard RS232 interface, U disk socket (automatic U disk storage data).
Printer: micro thermal printer
environment temperature: -10℃ ~ 50℃
relative humidity: <90%
Overall dimension: 430×330×350mm
Weight: 28kg