Máy tạo dòng điện PCU1-SP
PCU1-SP Specification
Loading Unit Current Metering
The AC output current is metered by a true RMS memory ammeter (acquisition time 200ms) with a liquid crystal display. The current metering has 3 ranges corresponding to 10%, 50% and 100% of the maximum rating of the loading unit. In addition, a 200% metering range is enabled in pulse mode.
| NLU2000 | Range | Full Scale | Resolution | Accuracy |
| 10% | 200.0A | 0.1A | ±0.5%rdg+5d*1 | |
| 50% | 1000A | 1A | ±0.5%rdg+5d*1 | |
| 100% | 2000A | 1A | ±0.5%rdg+5d*1 | |
| 200% | 4000A | 1A | ±1%rdg+5d*2 |
| NLU5000 | Range | Full Scale | Resolution | Accuracy |
| 10% | 500.0A | 0.1A | ±0.5%rdg+5d*1 | |
| 50% | 2500A | 1A | ±0.5%rdg+5d*1 | |
| 100% | 5000A | 1A | ±0.5%rdg+5d*1 | |
| 200% | 10kA | 0.01kA | ±1%rdg+5d*2 |
*11.5% rdg+5d in pulse mode *2selected in pulse mode
Timing System
The PCU1 systems have a flexible timing system with two contact inputs and 5 operating modes. Each contact circuit automatically selects for N/O or N/C contacts, and the status of each contact input is shown by an LED. The timing channels may also be triggered by a dc voltage between 24 and 240V.
| Timer resolution | 1ms |
| Timer full scale: | 999.999s |
| Timer accuracy | ±0.01%rdg+2d (4d current mode) |
| Contact O/C voltage | 24V |
| Contact S/C current | 20mA |
| Vdc input range | 24-240Vdc |
Timer modes
| Timer mode | Timer start | Timer stop |
| Internal Start | ‘On’ button | Contact |
| Single contact | Contact 1 | Contact 1 |
| Dual contact | Contact 1 | Contact 2 |
| Current operated *3 | Current >20% range | Current <20% range |
| Pulse mode 0.2s*4 | ‘On button’ | 0.2s |
| Pulse mode 0.5s *4 | ‘On button’ | 0.5s |
| Pulse mode 1s *4 | ‘On button’ | 1s |
| Pulse mode 2s *4 | ‘On button’ | 2s |
| Off | Setting position |
*3 Current operated mode is used to time circuit breakers with no auxiliary contacts. The timer is started when the current exceeds 20% of the selected metering range (e.g. 100A on the NLU5000 500A range). The timer stops when the current falls below this threshold.
*4 Pulse mode applies current to the load for a maximum of the specified time. If contact set 1 changes state or the current drops below 20% of the metering range during the pulse time, the timer is stopped. The maximum output current is increased in pulse mode. The maximum obtainable current is set by the impedance of the test object and output leads.
Secondary Injection Output (PCU1-SP only)
The secondary current injection output on thePCU1-SP has two taps allowing the injection of currents up to 100A.
| Secondary current output ratings |
Output Range |
Continuous |
Intermittent current 5 min*5 |
Interminttent current 1 min*5 |
| 0-5V | 33A | 67A | 100A | |
| 0-16V | 10A | 20A | 30A |
*5All on times must be followed by an off time of 15 minutes
|
Secondary |
Metering Range |
Resolution |
Accuracy | Current trip |
| current | 10.00A | 0.01A | ±0.5%rdg+5d | 10.5A |
| metering | 20.00A | 0.01A | ±0.5%rdg+5d | 21A |
| ranges | 100.0A | 0.1A | ±0.5%rdg+5d | 100A |
The output is protected by electronic trips and a circuit breaker.
Supply Requirements
|
230V±10% |
45-65Hz |
1ph |
11.5kVA max | (23kVA overload for 2s) |
Control Unit Standard Accessories
The following accessories are supplied with the PCU1-SP as standard:
Mains lead (5m), loading unit power and metering leads (5m), operating manual and spare fuses.
Dimensions and Weight
| Unit | W(mm) | H(mm) | D(mm) | Weight(kg) |
| PCU1-SP | 450 | 275 | 305 | 26 |
|
PCU1-LT |
450 | 275 | 305 | 23 |
| NLU5000 | 450 | 275 | 370 including terminals | 55 |
|
NLU2000 |
450 |
275 |
370 including terminals | 50 |
Temperature Range: Storage -20°C to 60°C, Operating 0°C to 45°C
Protection and Safety
The PCU1 series and loading units are CE marked and are designed to meet the requirements of BS EN61010. The system is protected by electronic trips on the outputs, circuit breakers on the mains input, control unit output and secondary injection output (PCU1-SP only). The unit also has a duty cycle trip on the loading unit output and the loading unit has comprehensive thermal protection.
Optional Loading Unit Specifications
Two loading units are available to provide a range of output currents suitable for different primary injection tasks. Each loading unit has three output taps allowing current injection into a wide range of loads of differing impedances. Optional output lead sets are also available.
NLU5000
| Output Voltage*6 | Maximum current | |||
| Continuous | 5 minutes * | 1 minute | 40 seconds | |
|
2.3V |
1500A | 3000A | 4500A | 5000A |
| 4.6V | 750A | 1500A | 2250A | 2500A |
|
9.2V |
375A |
750A |
1125A | 1250A |
NLU2000
| Output Voltage*6 | Maximum current | |||
| Continuous | 5 minutes * | 1 minute | 40 seconds | |
|
3.5V |
600A | 1200A | 1800A | 2000A |
| 6.9V | 300A | 600A | 900A | 1200A |
|
13.8V |
150A |
300A |
450A | 500A |
*6Open circuit voltage at rated mains voltage
