Manual Tan Delta Bridge
HCL2876 Manual Tan Delta Bridge
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HCL2876 Manual Tan Delta Bridge

Lead time: 30 days

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

APPLICATION  HCL2876 Manual C, L & tan δ/ cos ϕ precision measuring bridge is designed for determining the capacitance and dielectric dissipation factor of liquid and solid insulants, cables, capacitors, line transformers, generators, motors, bushings etc. Furthermore it can also be used for power loss measurement on shunt reactors or similar apparatus. This system is suitable for both low and high voltage measurement at line frequency. Measurement reports can be printed. This measuring equipment has been specially developed to maximise efficiency in production and quality control environments. Its outstanding accuracy also makes it suitable for laboratory and research applications.

  - Test specimen capacitance CX
  - Dissipation Factor tan δ, Power Factor PF (cos ϕ)
  - Inductance LX, Quality Factor QF
  - quivalent series Resistance RS
  - Real Power P, Apparent Power S, Reactive Power Q
  - Test specimen current Ix
  - Test Frequency f
  - Test Voltage as Peak, RMS or Peak/√2      

  - Bridge balancing is independent of test frequency
  - Large measuring range for capacitance, dissipation factor tan δ and inductance
  - Direct connection for charging currents up to 15 A
  - Built­in protection against electrical insulation failure of the test object and against stray electrical fields
  - Built­in test circuit and test program for checking the display and functions  Additional options according to customer specification
tan delta bridge tan delta bridge
tan delta bridge tan delta bridge

Standard capacitor CN (permitted values) 
CN = 10 - 10000pF  ICN max = 15 mA
Max. Test object Capacitance
CX max = 1099.99 x CN x 1000  (the 1000 is the ratio of Current Expander)

Test voltage
Range 50 V…1.6MV typically.
Max. Test voltage
U max = ICN max / 2πfCN  ,ICN max = 15 mA  Resolution 1 V… 1 kV
Accuracy 1% rdg ± 2 LSD*  

t frequency  
Range: 45-65 Hz  Resolution: 0.1 Hz
Accuracy ± 0.2 %  

t current
Up to 3000 Amps, extension with external current comparato

e Capacitance (manual range selection)  
Range: 0.1…1099.99 x
CN  Resolution: 5 significant digits  
Accuracy: 0.01%  
Minimum ICX: 31 µA  

n Factor tan δ (Manual range selection)  
Range                             Resolution  
0.00000…0.00999     5 x 10-5­  
0.0100…0.0999          5 x 10-4  
0.100…0.999                1 x 10­-3  
1.00…9.99                     1 x 10­-3  
Accuracy            ± 0.5% of the reading ±0.005%

r Factor cos ϕ
Range: 0.00000…1
Resolution: 5 significant digits
Accuracy           1% rdg ± 2 LSD*

Power Supply
Voltage: 220/380V, -10%...+6%  Frequency: 50/60 Hz

tan delta bridge tan delta bridge
tan delta bridge tan delta bridge
Wiring box for measurin: one side is LEMO connector, another side is two wiring tap: one for grounding, another for connection.

Self-Correction of Apparatus:
This is a high precision bridge. By doing self-correction of the bridge to check if the measured results are reliable and to verify the system tolerance of the whole system (including the high voltage circuit).
Self-Correction of Apparatus
Use two standard capacitors 100pF (or 1000pF) with same nominal values:
One is Cs1 and connected to the standard socket Cs of the high voltage bridgeHCL2876, the other is Cs2 connected to the socket CxI of this bridge . Set the ratio of the bridge HCL2876 as “1”. Then balance the bridge according to the procedures of three-terminal measurement as explained in this Manual and get readings of (Cx/Cs)1 and tgδ. Then exchange the position of Cs1 and Cs2, i.e. Cs2 is connected to the socket Cs, and Cs1 is connected to the socket Cx. The ratio of bridge is still at “1”. Obtain balance again of this bridge under the same voltage as the first measurement and get the reading (Cx/Cs) and tgδ.
The tolerance of the whole system can be calculated as follows:

manual tan delta bridge

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