Kia Niro: High Voltage Battery System / Power Relay Assembly (PRA) Description and operation
| Description |
The Power Relay Assembly (PRA) consists of the positive and negative main relays, pre-charge relay, pre-charge resistor and battery current sensor. It is located inside the battery pack assembly and controls the high voltage power circuit between the high voltage battery and inverter by the control signal of BMS ECU.
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1. High Voltage Power Terminal (-) 2. High Voltage Power Terminal (+) 3. Battery Current Sensor 4. Inverter Power Terminal (-) 5. Inverter Power Terminal (+) 6. Pre-Charge Resistor |
7. Main Relay (+) 8. Pre-Charge Relay 9. Main Relay (-) 10. Power Relay Assembly Connector (Battery current sensor signal input) 11. Power Relay Assembly Connector (Main relay control) |
| [PRA Operation Sequence] |
Power Relay Assembly (PRA) Specifications
Specification
Power Relay Assembly
(PRA)
Item
Specification
Rated Voltage (V)
240
Rated Current (A)
...
Power Relay Assembly (PRA) Repair procedures
Removal
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Be sure to read and follow the “General Safety Information and
Caution” ...
Other information:
Kia Niro 2017 (DE HEV) Service Manual: General safety information and caution
Precautions
General Precautions
Please read the following precautions carefully before performing the airbag
system service.
Observe the instructions described in this manual, or the airbags could accidentally
deploy and cause damage or injuries.
•
...
Kia Niro 2017 (DE HEV) Service Manual: Injector Description and operation
Description
The GDI injector is similar to a standard injector, but sprays fuel at a much
higher pressure directly into the combustion chamber and has a swirl disc to get
the fuel swirling as it exits the nozzle. This aids in atomization of the fuel.
The ECM controls both the fee ...
