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--- mk3:hvrelaywirring [2025/04/07 15:12] – angelegt grnbms_tech
+++ mk3:hvrelaywirring [2025/06/25 09:54] (aktuell) – [Relay Control] grnbms
@@ Zeile 1: / Zeile 1: @@
 ==== 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**:
-{{false?nolink&|Relay Wiring Diagram}}
+{{:mk3:screenshot_2025-04-07_170957.png?740x358}}
 === 🧩 Components: ===
-  *
+  * **HV Battery:**  Provides the main power
+  * **HV Fuse:**  Protects the system from overcurrent
+  * **HV Relays (3 total):**
+      * **Precharge Relay:**  Connects via precharge resistor to slowly charge input capacitors
+      * **Positive Relay:**  Main high-side connection to the load
+      * **Negative Relay:**  Switches the low side (Battery -)
+  * **Precharge Resistor:**  Limits inrush current when first connecting to the inverter
+  * **Current Shunt:**  Measures total current flow
+  * **Inverter / Load:**  Final consumer of the HV power
+  * **Chassis connection (''E''  pin):**  Must be connected to battery chassis – ideally with 2 separate wires
+=== 🔌 BMS HV Connector Pins: ===
-**HV Battery:**  Provides the main power
+  * **B+ / B-:**  Connect directly to the battery
-  *
+  * **O+ / O-:**  Connected after the relays, represents the //output side//
+  * **E:**  Earth/Chassis connection
+''⚠️ Important: The **precharge path**  must always lead through the shunt to ensure current measurement during precharge. The **positive and negative relays**  must remain **open**  during precharge phase and close only after precharge completes.''
-**HV Fuse:**  Protects the system from overcurrent
+👉 This wiring ensures proper current monitoring and safe soft-start of the system.
-  *
-**HV Relays (3 total):**
+==== Relay Control ====
-      *
-**Precharge Relay:**  Connects via precharge resistor to slowly charge input capacitors
+The GRNbms MK3 directly controls all three HV relays using integrated 12 V outputs.\\
-      *
+Each relay is connected via its **dedicated connector**:
-**Positive Relay:**  Main high-side connection to the load
+   * **HV Relay Positive**
-      *
+  * **HV Relay Negative**
+  * **HV Relay Precharge**
+=== Requirements: ===
-**Negative Relay:**  Switches the low side (Battery -) to GND
+  * 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
-**Precharge Resistor:**  Limits inrush current when first connecting to the inverter
+👉 We recommend using relays with economizer to avoid unnecessary load on the BMS power supply
-  *
-**Current Shunt:**  Measures total current flow
+''✅ Just plug in your relays – the BMS handles power and timing automatically''
-  *
-**Inverter / Load:**  Final consumer of the HV power
-  *
-**Chassis connection (''E''  pin):**  Must be connected to battery chassis – ideally with 2 separate wires
-=== 🔌 BMS HV Connector Pins: ===
-  *
-**B+ / B-:**  Connect directly to the battery
-  *
-**O+ / O-:**  Connected after the relays, represents the //output side//
-  *
-**E:**  Earth/Chassis connection
-''⚠️ Important: The **precharge path**  must always lead through the shunt to ensure current measurement during precharge. \\ The **positive and negative relays**  must remain **open**  during precharge phase and close only after precharge completes.''
-👉 This wiring ensures proper current monitoring and safe soft-start of the system.