Reactor Loss Measurement Systems

  • Automatic Self-Balancing
  • Current Comparator Technology
  • Lead Compensation Circuit
  • Capacitance, Inductance and Reactor Loss Measurements
  • Overall Ratio Accuracy < 15 ppm
  • High-Voltage Capacitors to 800 kV
  • Current Transformers to 4000 A
  • Low- and High-Voltage Capacitance Measurements
  • Large Touch Screen Displays HV and Reactor Current and Reactor Losses
  • Display Updates Every 1 Second
  • Potential Transformer Calibration
  • Inductance Measurements
  • Reactor Loss Measurements
Features & Benefits

The Shunt Reactor Loss Measurement system is a microprocessor-controlled, metrology-based, high-voltage capacitance, inductance and reactor loss measurement bridge which is based on the two-stage-compensated current transformer. The 7010C bridge can be ordered by itself or it can be ordered with high-voltage capacitors up to 800 kV line-to-ground and two-stage-compensated current transformers up to 4000 A. The system is fully automatic displaying the RMS voltage at the top of the capacitor, the reactor current and the reactor losses.

The Acculoss® Shunt Reactor Loss Measurement System is a complete loss measurement system designed for power frequency testing and calibration of medium and large power shunt reactors. The measurement capability of the model SR 7010/400 is 400 kV (line-to-ground) and currents up to 4000 A at frequencies of 50/60 Hz. A large 7″ (178.5 mm) touch screen display, located on the front panel, is used to enter data and configure the input of the 7010C.

The USB slot on the front panel is used to save measurement setups and measurement data. The easy to use touch screen menus allow the operator to select the number of readings for statistical analysis of the uncertainty calculations at the 95 % (2 s) level. Measurement parameters for capacitance and inductance can be transmitted over the IEEE-488 interface for storage to a computer.

The automatic self-balancing feature facilitates the use of the bridge for accurate load loss measurements of large high-voltage inductive loads. Touch screen menus allow the operator to select capacitance, inductance and reactor loss measurement functions.

The model 7010C is a capacitance/inductance bridge with a maximum ratio of 1000:1 making it ideal for both low- and high-voltage applications. Overall accuracy is < 15 ppm in magnitude and phase. The 7010C has ratios of 1, 2, 5, 10, 20, 50, 100, 200, 500 and 1000:1 and dissipation (loss tangent) measurements from 0 to 10 % with a resolution of 1 ppm.

To accommodate larger capacitance ratios than 1000:1 an additional two-stage range extender, model 7020 may be added to increase the ratio to 2,000,000:1. All connections are made on the rear of the 7010C bridge. The current input is secured using a locking connector and the voltage input is secured by a BNC locking connector. It also has a schematic for measuring losses with the 7020-2000:1 range extender and the high-voltage capacitor. Leads up to 50 metres are available for connecting the output of the high-voltage capacitor and model 7020 range extender.

Optional Models

RLMS2400
(2000 A, Ratio 2,000,000:1, 400 kV L-G)

RLMS2600
(2000 A, Ratio 2,000,000:1, 600 kV L-G)

RLMS2800
(2000 A, Ratio 2,000,000:1, 800 kV L-G)

Optional Shielded Rack

The 7010C can be supplied as a laboratory benchtop instrument or a test floor unit on castors for portability allowing the user to move it about the test floor. All inputs are located on the rear of the rack. Locking BNC connectors are used to connect the high-voltage capacitors. Two current inputs are provided. The current input of the 7010C has both a locking connector on the output of the 7020 Range Extender and a locking connector on the input of the 7010C as well as a five-way binding post input for connecting other manufacturers current transformers.

Optional High-Voltage Capacitors – CG Series

The high-voltage capacitors consist of a low-voltage measurement electrode which is isolated from the high-voltage electrode by a dielectric gas (SF⁶). A guard electrode or grounding technique can be used to eliminate parasitic capacitance. Grounding or connecting the guard circuit is specific to the installation and application.

CG 100 – 100 pF 100 kV – Voltage range: 50 kV to 500 kV
CG 200 – 100 pF 200 kV – Tangent delta (Tan ẟ): < 1.10-5
CG 300 – 100 pF 300 kV – Nominal capacitance: 5 pF to 1000 pF
CG 400 – 100 pF 400 kV – Voltage coefficient: < 30 ppm (Typically < 10 ppm)
CG 500 – 100 pF 500 kV – Stability / year: < 0.05 %

Note: For higher voltages please contact MI
Note: 50 pf Capacitors also available

Specifications
Capacitance Range Cs: 10 pF to 10,000 pF
Cx: 10 pF to 10,000,000 pF (10 µF)
Capacitive Ratio 1:1 to 1000:1 Ns: 0 to 1.11110 in steps of 0.000001
Nx: 1 to 1000 in steps of 1, 2, 5
Primary Current 10 Amp Maximum
Secondary (Cs) Current Range 40 µA to 10 mA
Dissipation Factor Range 0 to 10 % in steps of 0.000001
Inductance Range 700 µH to 700000 H (Q factor > 10)
Test Frequencies 50 and 60 Hz
Accuracy Ratio: ± 15 ppm for all Cx Ratios
Loss Angle ± 1 % of Reading ± 10 ppm
Display 7-inch Screen Display
Warm-Up Time < 5 Minutes to Full Rated Accuracy
Operating Environment 18 to 34 °C, 10 to 80 % RH
Operating Power 100, 120, 220, 240 V – 50/60 Hz

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