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mk3:hvrelaywirring

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mk3:hvrelaywirring [2025/04/07 15:15] grnbms_techmk3:hvrelaywirring [2025/06/25 09:54] (aktuell) – [Relay Control] grnbms
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 ==== High Voltage Relay Wiring – with Precharge ==== ==== High Voltage Relay Wiring – with Precharge ====
 +
 +⚠️ **Disclaimer – Safety First!** \\
 +The wiring diagrams and connection examples provided here are **suggestions only** and may not cover all edge cases or safety requirements.\\
 +All high-voltage components must be installed and verified by a **qualified electrician** or professional installer.\\
 +Incorrect wiring or misuse can lead to **severe damage, fire, or personal injury**.\\
 +The manufacturer assumes **no liability** for damages resulting from improper installation or handling.
  
 Below is the recommended HV wiring setup for systems using **3 relays** and **precharge functionality**: Below is the recommended HV wiring setup for systems using **3 relays** and **precharge functionality**:
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       * **Precharge Relay:**  Connects via precharge resistor to slowly charge input capacitors       * **Precharge Relay:**  Connects via precharge resistor to slowly charge input capacitors
       * **Positive Relay:**  Main high-side connection to the load       * **Positive Relay:**  Main high-side connection to the load
-      * **Negative Relay:**  Switches the low side (Battery -) to GND+      * **Negative Relay:**  Switches the low side (Battery -)
   * **Precharge Resistor:**  Limits inrush current when first connecting to the inverter   * **Precharge Resistor:**  Limits inrush current when first connecting to the inverter
   * **Current Shunt:**  Measures total current flow   * **Current Shunt:**  Measures total current flow
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 👉 This wiring ensures proper current monitoring and safe soft-start of the system. 👉 This wiring ensures proper current monitoring and safe soft-start of the system.
 +
 +==== Relay Control ====
 +
 +The GRNbms MK3 directly controls all three HV relays using integrated 12 V outputs.\\
 +Each relay is connected via its **dedicated connector**:
 +
 +   * **HV Relay Positive**
 +  * **HV Relay Negative**
 +  * **HV Relay Precharge**
 +=== Requirements: ===
 +
 +  * Relays must have a **12 V coil**
 +  * **No external power supply**  is needed – the BMS provides the 12 V directly
 +  * Each output is internally protected and current-limited
 +
 +👉 We recommend using relays with economizer to avoid unnecessary load on the BMS power supply
 +
 +''✅ Just plug in your relays – the BMS handles power and timing automatically''
  
  
mk3/hvrelaywirring.1744038914.txt.gz · Zuletzt geändert: 2025/04/07 15:15 von grnbms_tech