Overview
The “Neutral time overcurrent” element can provide a desired time-delay operating characteristic versus the applied current or be used as a simple definite time element. The neutral current input value is a quantity calculated as 3Io from the phase currents and can be programmed as fundamental phasor magnitude or total waveform RMS magnitude as required by the application.
For more detailed information on “Neutral time overcurrent” element, refer to GE, Universal Relay (UR) family of products, Version 8.0x manuals.
To view other supported elements, click here.
Setting Parameters
Modbus memory map for Setting parameters
| Products | Hex address | Register name | Range | Units | Step | Format | Default |
| B30, C60, C70, C95, D30, D60, F35, F60, G30, G60, L30, L60, L90, M60, N60, T60 | 355F | Neutral Time Overcurrent 1 Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 3560 | Neutral Time Overcurrent 1 Signal Source | 0 to 5 | — | 1 | F167 | 0 (SRC 1) |
| " | 3561 | Neutral Time Overcurrent 1 Input | 0 to 1 | — | 1 | F122 | 0 (Phasor) |
| " | 3562 | Neutral Time Overcurrent 1 Pickup | 0.02 to 30 | pu | 0.001 | F001 | 1000 |
| " | 3563 | Neutral Time Overcurrent 1 Curve | 0 to 16 | — | 1 | F103 | 0 (IEEE Mod Inv) |
| " | 3564 | Neutral Time Overcurrent 1 Multiplier | 0 to 600 | — | 0.01 | F001 | 100 |
| " | 3565 | Neutral Time Overcurrent 1 Reset | 0 to 1 | — | 1 | F104 | 0 (Instantaneo us) |
| " | 3566 | Neutral Time Overcurrent 1 Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 3568 | Neutral Time Overcurrent 1 Target | 0 to 2 | — | 1 | F109 | 0 (Self-reset) |
| " | 3569 | Neutral Time Overcurrent 1 Events | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 356A | Reserved (6 items) | 0 to 1 | — | 1 | F001 | 0 |
| " | 3570 | …Repeated for Neutral Time Overcurrent 2 | |||||
| B30, C60, C70, C95, D60, F35, F60, L30, L60, L90, M60, N60, T60 | 3581 | …Repeated for Neutral Time Overcurrent 3 | |||||
| B30, C60, C70, C95, D60, F35, F60, L30, L60, L90, M60, N60, T60 | 3592 | …Repeated for Neutral Time Overcurrent 4 | |||||
| B30, C60, C70, C95, F35, F60, L90, M60, N60, T60 | 35A3 | …Repeated for Neutral Time Overcurrent 5 | |||||
| " | 35B4 | …Repeated for Neutral Time Overcurrent 6 | |||||
| B30 | 35C5 | …Repeated for Neutral Time Overcurrent 7 | |||||
| " | 35D6 | …Repeated for Neutral Time Overcurrent 8 | |||||
| " | 35E7 | …Repeated for Neutral Time Overcurrent 9 | |||||
| " | 35F8 | …Repeated for Neutral Time Overcurrent 10 | |||||
| " | 3609 | …Repeated for Neutral Time Overcurrent 11 | |||||
| " | 361A | …Repeated for Neutral Time Overcurrent 12 | |||||
| " | 362B | …Repeated for Neutral Time Overcurrent 13 | |||||
| " | 363C | …Repeated for Neutral Time Overcurrent 14 | |||||
| " | 364D | …Repeated for Neutral Time Overcurrent 15 | |||||
| " | 365E | …Repeated for Neutral Time Overcurrent 16 | |||||
| " | 366F | …Repeated for Neutral Time Overcurrent 17 | |||||
| " | 3680 | …Repeated for Neutral Time Overcurrent 18 | |||||
| " | 3691 | …Repeated for Neutral Time Overcurrent 19 | |||||
| " | 36A2 | …Repeated for Neutral Time Overcurrent 20 |
| F102 | 0 = Disabled, 1 = Enabled | ||||||
| F103 | 0 = IEEE Mod Inv, 1 = IEEE Very Inv, 2 = IEEE Ext Inv, 3 = IEC Curve A, 4 = IEC Curve B, 5 = IEC Curve C, 6 = IEC Short Inv, 7 = IAC Ext Inv, 9 = IAC Inverse, 10 = IAC Short Inv, 11 = I2t, 12 = Definite Time, 13 = FlexCurve A, 14 = FlexCurve B, 15 =FlexCurve C, 16 = FlexCurve D | ||||||
| F104 | 0 = Instantaneous, 1 = Timed | ||||||
| F109 | 0 = Self-reset, 1 = Latched, 2 = Disabled | ||||||
| F122 | 0 = Phasor, 1 = RMS | ||||||
| F167 | 0 = SRC 1, 1 = SRC 2, 2 = SRC 3, 3 = SRC 4, 4 = SRC 5, 5 = SRC 6 | ||||||
| F300 | 0 : Off (This is boolean FALSE value), 1 : On (This is boolean TRUE value) | ||||||
Logics & highlights
Neutral time overcurrent 1 logic
Definition of Setting Parameters
NEUTRAL TOC1 FUNCTION — This setting enables and disables the neutral time overcurrent protection element.
NEUTRAL TOC1 SIGNAL SOURCE — This setting selects the signal source for the neutral time overcurrent protection element.
NEUTRAL TOC1 INPUT — This setting selects how neutral current input quantities are interpreted by the D60. Inputs can be selected as fundamental phasor magnitudes or total waveform RMS magnitudes as required by the application.
NEUTRAL TOC1 PICKUP — This setting specifies the neutral time overcurrent pickup level in per-unit values.
NEUTRAL TOC1 CURVE — This setting selects the inverse time overcurrent curve style.
NEUTRAL TOC1 TD MULTIPLIER — This setting specifies a multiple of the base curve shape specified by the CURVE setting.
Programming this value to zero results in an instantaneous response to all current levels above pickup.
NEUTRAL TOC1 RESET — The “Instantaneous” reset method is intended for applications with other relays, such as most static relays, which set the energy capacity directly to zero when the current falls below the reset threshold. The “Timed” reset method can be used where the relay must coordinate with electromechanical relays.
NEUTRAL TOC1 BLOCK — Assertion of the operand assigned to this setting blocks operation of the neutral time overcurrent element.
NEUTRAL TOC1 EVENTS — This setting enables and disables the logging of neutral time overcurrent events in the sequence of events recorder.