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.
FOLLOWING VALUE CAN BE DISPLAYED:
- 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
BENEFITS
- 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
TECHNICAL PARAMETER OF SYSTEM
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*
Test frequency
Range: 45-65 Hz
Resolution: 0.1 Hz
Accuracy ± 0.2 %
Test current
Up to 3000 Amps, extension with external current comparator
Range Capacitance (manual range selection)
Range: 0.1…1099.99 x
CN
Resolution: 5 significant digits
Accuracy: 0.01%
Minimum ICX: 31 µA
Dissipation 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%
Power 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
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).
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:
ξ={[2-(Cx/Cs-Cx/Cs’)/2]×100%
Δtgδ=(tgδ1+tgδ2)/2
Packaging
HIMALAYAL provides innovative products that comprise high voltage test equipment, full-set high voltage test instruments, on-site test systems and on-line monitoring systems, and services regarding tests, diagnostics and asset monitoring for clients in power industry. We help to ensure safety and reliability in the power generation, transmission and distribution.
Himalayal Corporation Limited
Tel:+86 21 5059 9069
Email: info@himalayal.com
http://www.himalayal.com
http://www.himalayal.com.cn