URRHH Integrated protection device

URRHH Integrated protection device

Isolation Test Isolation resistance between output and FG (chassis) shall be more than 100MW at 500VDC and between output and CNT･PF shall be more than 10MW at 100VDC. For safety operation, voltage setting of DC isolation tester must be done before the test. Ensure that it is fully discharged after the test.Output Voltage External Control (PV) (A) Control by External Voltage Output voltage external control function is provided. Output voltage can be varied by applying an external voltage (1 － 6V) to “PV” terminal and “COM” terminal. Note if an external voltage is not applied, there will be no output. Please consider the following characteristics below when operating the unit.: Only as for the model of 48V, 60V output, the maximum output voltage is used up to 110% at 90% load current.

. Withstand Voltage

 This series is designed to withstand 3.0kVAC between input and output, 2.0kVAC between input and FG (chassis), 500VAC (60V model : 651VAC) between output and FG (chassis), and 100VAC between output and CNT･PF terminal each for 1 minute. When testing withstand voltage, set current limit of withstand voltage test equipment at 20mA. (Output-FG (chassis) : 300mA (60V model : 390mA), Output- CNT･PF : 100mA). The applied voltage must be gradually increased from zero to testing value and then gradually decreased for shut down. When timer is used, the power supply may be damaged by high impulse voltage at timer switch on and off. Connect input and output as follows. If output is left open during test, output voltage might appear momentarily. This product have monolithic ceramic capacitor in secondary circuit to frame ground. Some of the withstand voltage tester may generate high voltage at the matching with monolithic ceramic capacitor and may cause the unit damage. So, please check the waveform of test voltage.

Control by External Variable Resistor 

“PV” terminal and “COM” terminal usage is the same as explained in section ｢control by external voltage｣. But in this method voltage for control is supplied through REF terminal. Variable resistor is connected between REF terminal and COM terminal and the middle point of variable resistor is connected to PV terminal. Please use the output voltage within 20% - 120% of rated output voltage value (3V model : 30% - 120%, 48V, 60V model : 20% - 110%). Wires for control lines must be twisted wire or shield wire. In addition, maximum variable voltage when control by external variable resistor is rated output voltage (100%). When output voltage must be externally control to 120% of rated output voltage (110% for 48V, 60V model), please follow the following procedure. (1) PV terminal and REF terminal is short by using standard connector supplied. (2) Set the power supply output voltage to maximum value of the output voltage variable range mentioned in specification standard by adjusting V.ADJ volume at the front panel. (3) Remove standard connector after input is cut off. (4) Connect external variable resistor (50kW) between REF terminal and COM terminal. Then connect middle point of external variable resistor to PV terminal.(sensing current is 1.4mA)