Kia Niro: High Voltage Battery System / Power Relay Assembly (PRA) Description and operation

Kia Niro 2017 (DE HEV) Service Manual / Hybrid Control System / 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.

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    • Be sure to read and follow the “General Safety Information and Caution” ...

Other information:

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Kia Niro 2017 (DE HEV) Service Manual: Safety Plug Repair procedures
Removal    • Be sure to read and follow the “General Safety Information and Caution” before doing any work related with the high voltage system. Failure to follow the safety instr ...

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