Description
Precharger Unit
Two separate units. One for output 400VDC (model no ENR1000D110/400-PC), another for 600VDC (model no ENR1000D110/600-PC).
The precharger unit converts the input battery voltage to a regulated output voltage to charge capacitor bank. The unit will be used to charge the DC-link to a reduced voltage level of 400VDC/600VDC. An enable input signal is used to set the precharger unit in active mode or standby mode. A power OK output signal indicates normal/abnormal status.
The precharger unit will start to charge the DC-link when the enable input signal is set to high level. Enable signal is normally set to low level when the DC-link is charged to 400VDC/600VDC. The primary side, secondary side and the I/O interface are galvanic isolated from each other.
Electrical Design
- Precharger unit is designed acc to EN50155, EN50124-1 and IEC61287-1
- Insulation secondary side to ground 8.5kVDC, 1 min
- Insulation primary to secondary side 8.5kVDC, 1 min
- Primary input side to ground 1.5kVDC, 1 min
- I/O interface 1.5kVDC, 1 min
- Clearance and creepage distances acc to IEC664
- Overvoltage category II, pollution degree II
- Material group IIIa , CTI 175-400
- Max working voltage between 0V output (X2) and ground (PE) 3000VDC
Input
- Nominal input voltage 72-110VDC
- Min voltage 50VDC
- Max voltage 137.5VDC
- Max peak voltage 154VDC, max 100ms
- Input current max 20Arms
- The converter is protected against reversed polarity
- Input current level <5A after 1ms
- Max peak inrush current <350A
Output
- Output voltage nominal 400VDC/600VDC
- Min voltage 380VDC/540VDC
- Max voltage 420VDC/625VDC
- Output ripple voltage <2%
- Continuous output power 70W during 5 minutes at ambient temperature +70°C
- Capacitance load 5 to 35mF at 400VDC, 10-12mF at 600VDC
- External output reverse voltage max 5800VDC
- Overvoltage, overload and short circuit protection
- Thermal protection
Environmental
- Operating temperature range -40°C to +70°C, EN50155 temperature class TX
- The internal temperature protection circuit can be activated if the number of repetitive charging cycles will be more than 5
- Storage temperature -40°C to +85°C
- Shock and vibrations IEC61373, Cat 1 Class B
EMC
- Design acc to EN50155, EN50121-3-2 and EN50121-5
- ESD acc to IEC61000-4-2 and IEC62236-3-2
- Fast transient immunity acc to IEC61000-4-4 and IEC62236-3-2
- Surge acc to EN61000-4-5 and IEC62236-3-2
