- 223 -
M
MCB Miniature Circuit Breaker.
MODBUS Modicon
®
Communications Protocol.
N
-
O
-
P
P Active power (W).
PT Power Transformer.
Q
Q Reactive power (V·Ar).
R
RMS Root Mean Square.
RS485 2 wired, half-duplex, multi point serial communications connection.
RType Reset type
S
S Visual Power (VA).
SPST Single pole, single throw.
SPDT Single pole, double throw.
S
r PT
Power transformer rated complex power (kV·A).
S
n2 CT
Current transformer secondary nominal complex power (V·A).
T
T1 Type 1 earth protection.
T2 Type 2 earth protection.
tCBF Circuit Breaker Failure delay time (s).
TCS Trip Circuit Supervision.
TS Sensitive type earth protection.
t%(I
2
/I
1
)> Time delay trip due to broken conductor protection.
t
TCS
Trip Circuit Supervision delay time (s).
tI> Time delay trip due to phase overcurrent 1
st
threshold protection.
tI>> Time delay trip due to phase overcurrent 2
nd
threshold protection.
tI>>> Time delay trip due to phase overcurrent 3
rd
threshold protection.
tI
e
> Time delay trip due to earth overcurrent 1
st
threshold protection.
tI
e
>> Time delay trip due to earth overcurrent 2
nd
threshold protection.
tI
e
>>> Time delay trip due to earth overcurrent 3
rd
threshold protection.
tI< Time delay trip due to undercurrent protection.
U
USB Universal Serial Bus.
U
n
Nominal voltage (kV).
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