CHAPTER 5: SETTINGS CONTROL ELEMENTSG30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 5-2775An additional condition is introduced to inhibit a fuse failure declaration when the monitored circuit is de-energized;positive-sequence voltage and current are both below threshold levels.VT FUSE FAILURE 1 FUNCTION — Enables and disables the fuse failure feature for Source 1 VT Fuse Fail.NEUTRAL WIRE OPEN 1 DETECTION — Enables and disables the VT neutral wire open detection function. When the VT isconnected in Delta, do not enable this function because there is no neutral wire for Delta connected VT.NEUTRAL WIRE OPEN 1 3 HRAM PKP — Specifies the pickup level of 3rd harmonic of 3V0 signal for the NEUTRAL WIRE OPENDETECTION logic to pick up.Base voltage for this element is PHASE VT SECONDARY setting in the case of WYE VTs and (PHASE VT SECONDARY)/ in caseof DELTA VTs. The setting is found under SETTINGS SYSTEM SETUP AC INPUTS VOLTAGE BANK PHASE VT SECONDARY.Figure 5-155: VT fuse fail logic5.8.12.5 Thermal overload protection (ANSI 49)SETTINGS CONTROL ELEMENTS MONITORING ELEMENTS THERMAL OVERLOAD PROTECTION THERMAL PROTECTION 1(2) THERMAL PROTECTION 1 THERMAL PROTECTION 1FUNCTION: DisabledRange: Disabled, Enabled THERMAL PROTECTION 1SOURCE: SRC1Range: SRC 1, SRC 2, SRC 3, SRC 4