UV UV
U8
t8
V
PROTECT ION TR I P UNI TS
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t8
V
t
t
OV OV
U9
U9
t8 9
V
t8 9
V
t
t
f12
UF UF
f12
t12
f
t12
f
Overfrequency (OF - ANSI 81H) : with constant trip time (t = k), function is tripped when network frequency exceeds the set threshold.
t
t
OF OF
f13
f13
t13
f
t13
f
Voltage unbalance (VU – ANSI 47) : with constant trip time (t = k), help protect against an unbalance be - tween the voltages of the individual phases that are protected by the circuit- breaker.
mean
mean
voltage unbalance voltage unbalance
U14 U14
U1 U2 U3 U1 U2 U3
V1
senso ciclico senso ciclico Residual current (Rc – ANSI 64 & 50NDT) : with constant temperature (t=k) helps protect against indirect contacts and is integrated into Ekip Touch LSIG with Measurement Enabler with voltage sockets by a dedi- cated residual current rating plug and external toroid. The protection is an alternative to the functions G and Gext.
V1
L1 L2
V3
V2
V3
V2
LOAD
Reverse active power (RP - ANSI 32R) : with constant trip time (t = k), function is tripped when total active power – in the opposite direction of the current - exceeds the set threshold.
M
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