10-14 D60 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUALBATTERY CHAPTER 10: MAINTENANCE10Figure 10-11: Removing module (standard faceplate)2. With power to the unit off, disconnect individually the connections from the module before removing the module fromthe chassis.3. To properly remove a module, pull simultaneously the ejector/inserter clips, located at the top and bottom of themodule. Record the original location of the module to ensure that the same or replacement module is inserted into thecorrect slot. While modules with current input provide automatic shorting of external CT circuits, for CT/VT modules itis recommended to short/isolate external circuits accordingly for maximum safety.4. To properly insert a module, ensure that the correct module type is inserted into the correct slot position. The ejector/inserter clips located at the top and at the bottom of each module must be in the disengaged position as the moduleis smoothly inserted into the slot. Once the clips have cleared the raised edge of the chassis, engage the clipssimultaneously. When the clips have locked into position, the module is fully inserted.10.10 BatteryA battery powers the real time clock on startup of the device.When required, the battery can be replaced. The power supply module contains the battery. The battery type is 3 Vcylindrical.10.10.1 Replace battery for SH/SL power supplyWhen required, the battery can be replaced. The power supply module contains the battery.When adding a module (versus replacing a module), check that settings have not changed. Depending on themodule, settings can reset to default values.The new CT/VT modules can only be used with new CPUs; similarly, old CT/VT modules can only be used with oldCPUs. In the event that there is a mismatch between the CPU and CT/VT module, the relay does not function and aDSP ERROR or HARDWARE MISMATCH error displays.To avoid injury, ensure that the unit has been powered off for a minimum of three minutes beforereplacing the battery.Risk of fire if battery is replaced with incorrect type or polarity.
