AC power supply PCR-M series
Appendix
Rated output current of AC mode
Rated output current of DC mode
■ For linear loads
The rated AC output current of the PCR-M is limited by the PCR-M output capacity.
|
|
PCR500M |
PCR1000M |
PCR2000M |
PCR4000M |
|
Output capacity |
500 VA |
1000 VA |
2000 VA |
4000 VA |
■ For capacitor-input rectifying loads
In general, a peak current several times the output current rms flows near the peak output voltage as the output current.
In this case, the maximum output peak current must not exceed three times the rated maximum current.
135 V range: Maximum peak current = (Rated output capacity/100 V) x 3
270 V range: Maximum peak current = (Rated output capacity/200 V) x 3
If the PCR-M is used with a current exceeding the maximum rated peak current or the maximum current, the protection function of the PCR-M activates and may extremely distort the output voltage waveform or cut off the output.
To supply the maximum peak current above, hold the output voltage (setting) constant. If you suddenly change (increase) the output voltage setting, the output or current waveform may be distorted.
■ For loads that draw an inrush current
For the loads specified below, an inrush current (several to several tens of times the normal current) may flow during several to several tens of cycles of output frequency when voltage is applied or when the voltage changes suddenly.
• Transformers and slide transformers
When voltage is applied to a transformer or slide transformer load, an inrush current of a maximum of several tens to hundreds of times the normal current may flow for several cycles, depending on the voltage application timing or the state of biased magnetization.
• Motor and lamp loads
When voltage is applied to a motor or lamp load, an inrush current of several to several tens of times the normal current may flow for several tens to hundreds of cycles.
• For capacitor-input rectifying loads
For electronics devices with a capacitor input-type rectifier circuit at the input, if a protective (limiting) circuit against an inrush current is not provided, an inrush current several tens to hundreds of times the normal current may flow for several cycles.
The PCR-M is capable of feeding a maximum output peak current up to three times the rated maximum rms current to a capacitor input-type rectifying load.
If an inrush current exceeding the peak current flows, the protection function of the PCR-M activates and distort the output voltage waveform or cut off the output.
■ For loads that generate surges
Loads (such as a fluorescent lamp) that generate surges when voltage is applied or when the voltage changes suddenly may cause the PCR-M to malfunction. For these types of loads, install a noise filter in the load end.
■ For special loads
A current of 100 kHz to 150 kHz caused by the OUTPUT ripple voltage of a PWM inverter method flows to a capacitor when the capacitor is directly connected to the INPUT terminal of a load.
The rated DC output current that can be drawn from the PCR-M is limited by the PCR-M output capacity.
|
|
PCR500M |
PCR1000M |
PCR2000M |
PCR4000M |
|
Output capacity |
400 W |
800 W |
1600 W |
3200 W |
If the PCR-M is used with a current exceeding the rated DC output current, the protection function of the PCR-M activates and may cause the output voltage to drop or to be cut off.
AC power supply PCR-M series
Appendix