The server is connected to the PC (or tablet) via ethernet-cable or WiFi and keeps the communication with all devices:
- reference standard control and feedback
- controller
- error calculators (24 channels)
- meter communication (24 channels)
If the test bench has more than 24 positions, a second server CL2018 will be integrated.
The controller generates the information for the amplifiers for voltages, currents, phase angles and wave forms. Other companies name this device e.g. waveform controller or frequency generator.
Specifications for Controller CL309
| ITEM | VALUE |
| Frequency for test circuit | 45…65 Hz |
| Adjustable in steps of | 0.001 Hz |
| Test voltage settings, ph-N | 30 V…380 V |
| Test current settings | 1mA…120 A |
| Phase adjustment | Any power factor in
all 4 quadrants, 0…360° |
| Adjustment in steps of | 0.01° |
| Harmonics in voltage
| 2nd – 21st
max. magnitude 40% of
the fundamental wave |
| Harmonics in current | 2nd – 21st max. magnitude 40% of
the fundamental wave |
| Power supply | +/- 200 V dc |
| Size | 19”, 2 U |
| Weight | 6
kg |
The meter test system consists of three switch mode voltage amplifiers. Test voltage is synthetically generated in a digital electronic power source with a controller and switch mode amplifiers. The amplifiers have the following characteristics:
- high efficiency ( ≥ 85 %)
- power factor compensation of the mains connection according to EN 60555 / IEC 555
- high stability at inductive-, capacitive- and non-linear loads
- very high quality of the output signals, low total harmonic distortion (THD)
- protection against overload, short circuit, over-temperature
The amplifiers are digitally controlled and have internal measurement modules for additional stabilization of the output values.
Specifications for Voltage amplifier CL309-U
| Item | Value |
|---|
| Test voltage | 30 V ... 380 V |
| Voltage ranges | 57.7 V, 100 V, 220 V, 380 V |
| Adjustment | 0 % ... 120 % of range, min. voltage 30 V |
| Accuracy of the test amplitude | < 0.05 % |
| Accuracy of the test phase adjustment | < ±0.01° |
| Efficiency | > 85 % |
| Stability of the output settings | < 100 ppm, Ti = 100 s |
| Distortion | < 0.5 % |
| Superposition of harmonics | 2nd … 21st, max 40 % of the fundamental amplitude |
| Harmonics phase shift | 0°… 359.99° |
| Output power | 900 VA |
| Frequency | 45 … 65 Hz |
The meter test system consists of three switch mode current amplifiers. Test current is synthetically generated in a digital electronic power source with a controller and switch mode amplifiers. The amplifiers have the following characteristics:
- high efficiency ( ≥ 85 %)
- power factor compensation of the mains connection according to EN 60555 / IEC 555
- high stability at inductive-, capacitive- and non-linear loads
- very high quality of the output signals, low total harmonic distortion (THD)
- protection against overload, open circuit, over-temperature
The amplifiers are digitally controlled and have internal measurement modules for additional stabilization of the output values.
Specifications for current amplifier CL309-I
| Item | Value |
|---|
| Test current | 1 mA ... 120 A |
| Current ranges | 10 mA, 25 mA, 50 mA, 100 mA, 0.25 A, 0.5 A, 1 A,
2.5 A, 5 A, 10 A, 25 A, 50 A, 100 A |
| Adjustment | 0 % ... 120 % of range |
| Accuracy of the test amplitude | 0.05 % |
| Accuracy of the test phase adjustment | 0.01° |
| Efficiency | > 85 % |
| Stability of the output settings | < 100 ppm, Ti = 100 s |
| Distortion | < 0.5 % |
| Superposition of harmonics | 2nd… 21st, max 40 % of fundamental |
| Harmonics phase shift | 0°… 359.99° |
| Output power | 1,600 VA (optional 2,500 VA) |
| Frequency | 45 … 65 Hz |
The rectifier CL309-Y is providing a ±200 V power supply to the amplifiers. This allows a complete synthetic test value generation without disturbing influences from the mains grid. The power output for the CL309-Y is 7.5 kVA. To increase the output power, an additional rectifier can be added.
