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.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