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BETA Monitoring
Monitoring of Electrical Values
5
TT6 current relays
13/16
Siemens ET B1 · 10/2008
13
Function chart for
5
TT6 115 under/overcurrent relay signal
Contrary to all other current relays, a fault signal is always output
over the contact 11 – 14 (21 – 24). The red LEDs indicate
whether the signal is for an undercurrent or an overcurrent.
I2_07472b
On
t
Off
On
Off
LED
LED
t
t
1 4
2
On
Off
LED
N
N
t
v
v
t
v
green
red
red
Fault
Fault
Hyst.
Hyst.
© Siemens AG 2008