Datasheet
26 TDB401016en / Main catalogue part 4 – Residual current monitors, Residual current monitoring systems / 07.2010
4.1
Residual current monitor RCM420
Insulation coordination acc. to IEC 60664-1/IEC 60664-3
Rated insulation voltage 250 V
Rated impulse voltage/pollution degree 4 kV / III
Protective separation (reinforced insulation) between
(A1, A2) - (k, l, T/R) - (11, 12, 14) - (21, 22, 24)
Voltage tests according to IEC 61010-1 2.21 kV
Supply voltage
RCM420-D-1:
Supply voltage U
S
AC 16…72 V / DC 9.6…94 V
Frequency range U
S
42…460 Hz
RCM420-D-2:
Supply voltage U
S
AC/DC 70…300 V
Frequency range U
S
42…460 Hz
Power consumption ≤ 3 VA
Measuring circuit
Measuring current transformers, external type W…, WR…, WS…
Load 68 Ω
Rated insulation voltage (measuring current transformer) 800 V
Operating characteristic acc. to IEC 62020 and IEC/TR 60755 Type A
Rated frequency 42…2000 Hz
Measuring range 3 mA…16 A
Relative uncertainty 0…-20%
Relative uncertainty 0…30%
Response values
Rated residual operating current I
Δn1
(prewarning, AL1) 50…100 % x I
Δn2
, (50 %)*
Rated residual operating current I
Δn2
(alarm, AL2) 10 mA…10 A (30 mA)*
Hysteresis 10…25 % (15%)*
Specified time
Start-up delay t 0…10 s (0.5 s)*
Response delay t
on2
(alarm) 0…10 s (0 s)*
Response delay t
on1
(prewarning) 0…10 s (1 s)*
Delay on release t
off
0…99 s (1 s)*
Operating time t
ae
at I
Δn
= 1 x I
Δn1/2
≤ 180 ms
Operating time t
ae
at I
Δn
= 5 x I
Δn1/2
≤ 30 ms
Response time t
an
t
an
= t
ae
+ t
on1/2
Recovery time t
b
≤ 300 ms
Number of restart cycles 0…100 (0)*
Cable lengths for measuring current transformers
Single wire ≥ 0.75 mm² 0…1 m
Single wire, twisted ≥ 0.75 mm² 0…10 m
Shielded cable ≥ 0.75 mm² 0…40 m
Recommended cable
(shielded, shield on one side connected to terminal l of the RCM420, not connected to earth) J-Y(St)Y min. 2x0.8
Connection screw-type terminals
Displays, memory
Display range, measuring value 3 mA…16 A
Error of indication ±15 % / ± 2 digit
Measured-value memory for alarm value data record measured values
Password off / 0…999 (off)*
Fault memory alarm relay on / off (on)*
Inputs/outputs
Cable length for external test/reset button 0…10 m
Switching elements
Number of switching elements 2 x 1 changeover contact
Operating principle N/C operation / N/O operation (N/C operation)*
Electrical endurance, number of cycles 10000
Contact data acc. to IEC 60947-5-1:
Utilisation category AC-13 AC-14 DC-12 DC-12 DC-12
Rated operational voltage 230 V 230 V 24 V 110 V 220 V
Rated operational current 5 A 3 A 1 A 0.2 A 0.1 A
Minimum contact rating 1 mA at AC/DC ≥ 10 V
Environment/EMC
EMC IEC 62020: 2005-11
Operating temperature -25 ºC…+55 ºC
Climatic class acc. to IEC 60721
Stationary use (IEC 60721-3-3) 3K5 (except condensation and formation of ice)
Transport (IEC 60721-3-2) 2K3 (except condensation and formation of ice)
Long-time storage (IEC 60721-3-1) 1K4 (except condensation and formation of ice)
Classification of mechanical conditions IEC 60721
Stationary use (IEC 60721-3-3) 3M4
Transport (IEC 60721-3-2) 2M2
Long-time storage (IEC 60721-3-1) 1M3
Connection
Connection type push-wire terminals
Connection properties
rigid 0.2…2.5 mm² / AWG 24-12
flexible without ferrule 0.2…2.5 mm² / AWG 24-12
flexible with ferrule 0.2…1.5 mm² / AWG 24-16
Stripping length 10 mm
Opening force 50 N
Test opening, diameter 2.1 mm
Other
Operating mode continuous operation
Position of normal use any
Degree of protection, internal components (IEC 60529) IP30
Degree of protection, terminals (IEC 60529) IP20
Enclosure material polycarbonate
Flammability class UL94V-0
DIN rail mounting acc. to IEC 60715
Screw fixing 2 x M4 with mounting clip
Operating manual TGH1410
Weight ≤ 150 g
( )* = factory setting
Technical data
Ordering information
Type Response range I
Δn
Frequency range Measuring current transformers Supply voltage U
S
* Art. No.
RCM420-D-1 10 mA…10 A 42…2000 Hz W…, WR…, WS… DC 9.6…94 V / AC 42…460 Hz 16…72 V B 7401 4001
RCM420-D-2 10 mA…10 A 42…2000 Hz W…, WR…, WS… DC 70…300 V / AC 42…460 Hz 70…300 V B 7401 4002
Device version with screw terminals on request.
* Absolute values