TNI | G&W Electric

Switches combine rotary puffer style load break switching with electronically controlled, vacuum interrupter overcurrent protection in a deadfront, submersible device. Front and back compartments include source and tap side cables on one side and all switch operators on the other.

Features:

Provides internal ground position for load break switch ways
Ratings through 38kV, 630A
Provides load break to 20kA asymmetrical momentary and three phase fault interrupting to 25kA symmetrical

Load break switch (RP) ratings
Maximum design voltage	15.5 kV	27 kV	38 kV
Voltage class	15 kV	25 kV	35 kV
Impulse level (BIL)	110 kV	125 kV	150 kV
One minute withstand	35 AC kV	60 AC kV	70 kV
One minute withstand, production test rating	34 AC kV	40 AC kV	50 kV
15 minute withstand	53 DC kV	78 DC kV	103 kV
Continuous and load break current	630 Amps	630 Amps	630 Amps
Momentary current	40 kA asym	40 kA asym	40 kA asym
Fault close current, (3 times)	32 kA asym	32 kA asym	32 kA asym
One second current	25 kA sym	25 kA sym	25 kA sym
Mechanical endurance, operations	2000	2000	2000
Fault Interrupter (NI) ratings
Maximum design voltage	15.5 kV	27 kV	38 kV
Voltage class	15 kV	25 kV	35 kV
Impulse level (BIL)	110 kV	125 kV	150 kV
One minute withstand	50 AC kV	60 AC kV	70 AC kV
One minute withstand, Production test rating	34 AC kV	40 AC kV	50 AC kV
15 minute withstand	53 DC kV	78 DC kV	103 DC kV
Continuous and load break current	630 Amps	630 Amps	630 Amps
Symmetrical interrupting rating	12.5 kA	12.5 kA	12.5 kA
IEEE C37.60 Fault Interrupting Duty Total number of fault interruptions: 116
Percent of Maximum Interrupting Rating	Approx. Interrupting Current, Amps		No. of Fault Interruptions
15 – 20%	5,000		44
45 – 55%	12,500		56
90 – 100%	25,000		16