7SR220 Settings Guide
Unrestricted ©2018 Siemens Protection Devices Limited Page 37 of 107
Description Range Default
Gn 47-2 Hysteresis
Sets the pickup to drop-off thresholds e.g. 3% picks up at
setting and drops off below 97% of setting
0, 0.1 ... 79.9, 80 3 %
Gn 47-2 Delay
Sets operate delay time
0, 0.01 ... 14300, 14400 0.5 s
3.8. Neutral Overvoltage
Description Range Default
Gn 59N Voltage Source
Selects voltage source between calculated 3V0 (Vn) or
measured 3V0 through Vx input
Vn, Vx Vn
3.8.1. 59NIT
Description Range Default
Gn 59NIT Element
Selects whether the inverse time neutral over voltage element
is enabled
Disabled, Enabled Disabled
Gn 59NIT Setting
Pickup level
1, 1.5 ... 99.5, 100 5 V
Gn 59NIT Char
Selects characteristic curve to be IDMTL or DTL
DTL, IDMTL IDMTL
Gn 59NIT Time Mult (IDMTL)
Time multiplier (applicable to IDMTL curve but not DTL
selection)
0.1, 0.2 ... 139.5, 140 1
Gn 59NIT Delay (DTL)
Delay (applicable only when DTL is selected for characteristic)
0, 0.01 ... 19.99, 20 5 s
Gn 59NIT Reset
Selects between an instantaneous reset characteristic or a
definite time reset
(ANSI) Decaying, 0 ... 59, 60 0 s
3.8.2. 59NDT
Description Range Default
Gn 59NDT Element
Selects whether the definite time neutral over voltage element
is enabled
Disabled, Enabled Disabled
Gn 59NDT Setting
Pickup level
1, 1.5 ... 99.5, 100 5 V
Gn 59NDT Delay
Sets operate delay time
0, 0.01 ... 14300, 14400 0.01 s
3.9. U/O Frequency
Description Range Default
Gn 81 U/V Guard Setting
Selects voltage level below which the guard element is
applied.
5, 5.5 ... 199.5, 200 5 V
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