Neutral Overvoltage (59N); Definite Time (59Ndt) - Siemens Solkor 7PG2113 Technical Manual

2.16 Neutral Overvoltage (59N)

Voltage Inputs:
Current Inputs:
Disable:
Map Pickup LED:
The voltage source for the Neutral Overvoltage 59N function can be set as either Vn , calculated from the applied
3 phase voltage inputs or Vx, the V

2.16.1 Definite Time (59NDT)

If DTL setting is small, gradually increase single phase voltage until element operates.
If DTL is large apply 0.9x setting, check for no operation, apply 1.1x setting, check operation
Apply 2x setting voltage if possible and record operating time
Phase Vs
(Volts)
E
Check correct indication, trip output, alarm contacts, waveform record.
©2012 Siemens Protection Devices Limited
Figure 2.16-1 Neutral Overvoltage
V (V ), V (V
L1 A L2 B
n/a apply zero current to stabilize other functions
27/59, 47, 60VTS
59N-n - Self Reset
input. Apply test voltage to 1 phase input or V
4
DTL P.U. Current
(sec) Volts
Table 2.16-1
7PG2113/4/5/6 Commissioning & Maintenance
), V (V )
L3 C
Operate Time
2 x Vs
59NDT Test Results
input to suit.
4
Tolerence
Chapter 6 Page 58 of 77