HCL2840 Automatic Tan Delta Bridge

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HCL2840 Capacitance Tan Delta Bridge

Applied Standard:
ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories
IEC/ANSI/IEEE/ASTM IEC 61010, IEC 61326-1, IEC 61000-4-X, 61000-3-X, EN 55011, ANSI/IEEE C37.90
IEC 61000-4-2 Test Standard for Electrostatic Discharge (ESD) Immunity
BS EN 60247：2004 Insulating liquids—Measurement of relative permittivity,dielectric dissipation factor(tan δ) and d.c.resistivity
IEC 61620-1998 Insulating liquids - Determination of the dielectric dissipation factor by measurement of the conductance and capacitance - Test method
BS 5737-1979 Method for the measurement of relative permittivity, dielectric dissipation factor and DC resistivity of insulating liquids
LVD 2014/35/EU (Low Voltage)
EMC Directive 2014/30/EU (Electromagnetic Compatibility)
EN 61010-1-2010 Safety requirements for electrical equipment for measurement, control, and laboratory use
EN 61326-1-2013 Electrical equipment for measurement, control and laboratory use – EMC requirements

Description:
HCL2840 Automatic 12kV Capacitance & Dissipation Factor Test Set is designed to measure dissipation ( Dielectric Loss factor/DF/tgδ) or power factor (PF/cosφ ) in heavy electromagnetic interference environment such as in power plants or substations. Also it can be used in laboratory for high accurate test.
The test set is all-in-one structure: including precision digital bridge, 12kV/200mA frequency conversion power unit, reference capacitor (CN), and other electronic circuits. An external power supply can expand the test range. True portability is realized by the light weight. Simple usage is realized by the full automation. High per¬formance is realized by the digital process.

Feature:
The HCL2840 has advanced interference suppression circuit based on the frequency conversion and digital filter technique,
the ratio of interference current to specimen current is 2:1(200%). High speed A/D converters, processed by a DSP. self-calibrating,
accuracy standard capacitor, so the HCL2840 has high accuracy. All the input resistance is less than 2 Ohm, the attached capacitance of connection cable is negligible. Not only for on-the-spot test, it can also be used in laboratory for high accuracy test, such as oil dissipation factor test.Safe protection: output protection, input protection, grounded protection, fault protection.
HCL2840 has multiple functions:UST / GST /GSTg, all these functions with internal high voltage power supply need no assistant equipment. Using an external high voltage power supplies over 12kV or 5A. All test work will be done automatically after start the set.
The set can save 100 groups of data. And has a serial port to transmit data to the computer.
tan delta bridge

HCL2840 Capacitance Tan Delta Bridge

Technical Parameters:
Accuracy: Cx±(reading×1%+1pF)
DF tgδ: ±(reading×1%+0.00040)
PF cosφ: ±(reading×1%+0.00040)
Interference: Ratio of interference: current to specimen current is 2:1 ( 200% )
Capacitance Range: Internal HV 3pF~60000pF / 10kV, 60pF~1uF/0.5kV
External HV: 3pF~1.5uF/10kV
Resolution: 0.001pF, 4 digitals
No limit, Resolution: 0.001%
tgδ Range: (C/L/R specimen is automatic recognized)
Input current range: 10μA~5A
Internal HV: 0.5~12kV / 200mA (max)
Accuracy: ±(reading×1%+10V)
Control mode: Rise or fall smoothly
45Hz, 50Hz, 55Hz, 60Hz,
Frequency: 65Hz single frequency 45Hz/55Hz, 55Hz/65Hz,
47.5Hz/52.5Hz dual frequency
External HV: UST: 5A max
GST: 12kV/5A max, 38-72Hz
Test Time: 30s typical may vary in different test mode
Power Supply: 95V~130V,180V~260V,50Hz/60Hz or 1 phase power supply or generator
Display: 128*64 dot matrix
Printer: Thermal printer
Communication Port: RS-232
Operating Temperature: -10℃~50℃
Storage Temperature: -20℃~60℃
Humidity: <90% non-condensing
Dimensions: 46cm(L)*35cm(W)*34cm(H)
Weight:Main unit: 28kg
Cable: 5kg

HCL2840 Capacitance Tan Delta Bridge

Principle diagram of Tan Delta Bridge:

Principle diagram of tan delta bridge

For UST, the set tests Ix and In1.
For GST, the set tests Ig and In1.
For GSTg, the set tests Ig, Ix and In1.
If use an external standard capacitor, In will be tested and put into calculation. The external standard capacitor always connects to Cn socket like a UST specimen, and its HV terminal connects where the HV needed to be monitored.

Question 1:
The tan delta bridge's internal voltage is only 12kV, how can we test with higher voltage?
Answer:
The capacitance & tan delta bridge can work with internal power supply or external power supply. When use internal power supply, the voltage will be in the range of 0.5kV ~ 12kV. But when work with external power supply, the tan delta bridge can go high voltage via short-circuit internal power supply. In this way, the voltage will no limit.

Question 2:
What is the tan delta bridge relationship with the external SF6 Gas Insulated Standard Capacitor?
Answer:
The automatic tan delta bridge equips with an internal 12kV gas insulated standard capacitor, its works with internal power supply 12kV. When voltage higher than 12kV, User need equips external standard capacitor. The automatic tan delta bridge or manual tan delta bridge is design on the principle of comparing current from standard capacitor and object.

Question 3:
Is this device CE marked?
The answer is yes!

Question 4:
Which input voltage will suitable for the bridge?
Answer:
95V~130V and 180V~260V, the bridge will recognize the input voltage and select suitable input voltage mode to start the system. Both range are work.

Question 5:
What will happen when I use a 50Hz input voltage but I set 60Hz in the bridge?
Answer:
In the case, the value will 20% higher than 50Hz. Please set correct frequency in the bridge.

HCL2840 Capacitance Tan Delta Bridge