Technical data
40
RCMA423AS_D00157_01_M_XXEN/08.2016
Measuring circuit
External measuring current transformer ........................ W20AB, W35AB(P), W60AB(P), W120AB, W210AB series
Rated insulation voltage (measuring current transformer) .................................................................................. 800 V
Rated frequency ......................................................................................................................................... 0…1000 Hz
Relative uncertainty for
f
≤ 2 Hz or ≥ 30 Hz ...................................................................................................... ±10 %
Relative uncertainty for
f
> 2…< 30 Hz.................................................................................................-35…100 %
Response values
Rated residual operating current
I
Δ
n1
(prewarning, AL1) ........................................... 50…100 % of
I
Δ
n2
(50 %)*
Rated residual operating current
I
Δ
n2
(alarm, AL2) .......................................................... 100 mA…5 A (100 mA)*
Hysteresis ....................................................................................................................................... 10…25 % (15%)*
Specified time
Start-up delay
t
.................................................................................................................................. 0…10 s (0.5 s)*
Response delay
t
on1
.............................................................................................................................. 0…10 s (0 s)*
Response delay
t
on1
(alarm) ................................................................................................................. 0…10 s (0 s)*
Delay on release
t
off
............................................................................................................................. 0…300 s (1 s)*
The actuating times depend on the rated frequency:
Operating time
t
ae
at
I
Δ
n
= 1 x
I
Δ
n1/2
(≥ 50…≤ 1000 Hz) ............................................ ≤ 50 ms
Operating time
t
ae
at
I
Δ
n
= 2 x
I
Δ
n1/2
(< 50 Hz)............................................................... ≤ 50 ms
Response time
t
an
...................................................................................................
t
an
=
t
ae
+
t
on1/2
Recovery time
t
b
.............................................................................................................................................. ≤300 ms
Displays, memory
Display range, measured value AC/DC .......................................................................................................... 0…9.6 A
Error of indication ......................................................................................................................... ±17.5 % / ± 2 digit
Measured-value memory for alarm value ..................................................................... data record measured values
Password ........................................................................................................................................ off / 0…999 (off)*
Fault memory alarm relay .......................................................................................................................................... on
Inputs/outputs
Cable length for external test / reset button................................................................................................... 0…10 m
Cable lengths for measuring current transformers
Connection WX… (see ordering information on page 43) ................................................ 1 m / 2.5 m / 5 m / 10 m
or alternatively: single wire 6 x 0.75 mm
2
.................................................................................................... 0…10 m
