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RCMA473L6 Datasheet / GFCI s
For grounded and high-resistance grounded
1-phase and 3-phase AC, DC and AC/DC systems
including systems with variable frequency drives
s
Offers the highest degree of personnel protection
available today
s
Alarm set-point value is 6mA as per UL943, Class A
Optional 20mA setpoint, UL943, Class
C
s
For use with BENDER external current transformer
Model: W2-A62B
s
Operation LED, Alarm LED and built-in 10-100%
LED meter display
s
Two alarm outputs for remote indication and quick power
interruption
Dimension Diagram mm (inch)
GROUND FAULT MONITOR
UL943 - Class A GFCI Module
Product Description
The BENDER RCMA473L6 extends the capability of standard
Ground Fault Monitors to the detection of ground fault leakage
currents in all stages of power conversion equipment from simple
rectifiers to sophisticated variable frequency drives and brushless
DC motor controllers, with signal content extending from pure DC
to the low kHz range.
The RCMA473L6 is designed to work with the BENDER W2-
A62B Current Transformer. The W2-A62B current transformer
has a 62mm (
2.45") internal diameter. All power conductors to
be monitored must go through the current transformer including
the neutral if line-to-neutral loads are to be monitored. The
equipment grounding conductor (ground wire) should never go
through the current transformer.
When installed with our special contactors, these devices are
listed per UL943, as Class A GFCI for personnel protection and
can protect single-phase and three-phase AC systems, with or
without neutral conductors and DC systems.
The alarm set-point value I n
is fixed at 6mA as required per
UL943 for personnel protection. The response of the
RCMA473L6 to hazardous fault currents, is related to the UL943
standard, which requires an alarm response to follow an inverse
time curve. For example, at 6mA, UL943 requires the GFCI to
interrupt within 5594msec (5.6 seconds), at 10mA it must
interrupt within 2694msec (2.4 seconds), at 25mA it must
interrupt at 726msec (0.73 seconds) and at 250mA is must
interrupt at 25msec. The RCMA473L6 follows this UL943 time
curve, unlike any GFCI on the market today. This allows a
longer response time for lower fault currents, while still
maintaining the fast response time at the higher fault currents.
The monitor is designed for mounting in control and distribution
panels using DIN 35/15 rail according to DIN EN 50 022 or for
screw mounting.
Operational Information
The green LED indicates that the monitor is operating. The
yellow LED indicates the unit is in ALARM. The RCMA473L6
offers a built-in meter from goes from 10% to 100% where 100%
is the 6mA alarm setpoint. The RCMA473L6 will alarm when the
ground fault current exceeds this 6mA alarm set-point. For fast
fault response as required by UL943, the RCMA473L6 offers an
electronic switch via terminals S1 and S2 and a special SPDT
relay contact via terminals 11, 12 and 14.
The RCMA473L6 can be reset by pushing the <Reset> button on
the front of the unit or by using the external reset function via
terminals R1 and R2, but only if the ground leakage current has
dropped at least 25% below the alarm set-point value. Testing is
via an external test resistor which allows a test current to flow
through the current transformer.
RCMA473L6
W2-A62B
99
91
(3.58")
45
(1.77")
53
(2.09")
65
(2.56")
73
(2.87")
70
(2.76")
44

(1.73")
31
(1.22")
ø 4,3
(0.17")
for
screw mounting
5
(0.2")
(3.9")
I n
MONITOR
Q u a l i t y S y s t e m
C e r t i f i e d
I S O 9 0 0 1
VDE IEC
A1 A2
11 12
14
ALARM
ON
TEST
RESET
T/R
S1 S2
T/R
k1 k2 I1 I2
10
50
100%
RCMA473
I n
6 mA
Bender Inc. - 700 Fox Chase - Coatesville, PA 19320 - Toll-free: (800) 356-4266 - Fax: (610) 383-7100 Technical Data - RCMA473L6
-33
Insulation
Rated insulation voltage
AC
600 V
Rated impulse withstand voltage/
noise level
4 kV/3
Hi-pot test
3 kV
Operation class
continuous operation
Supply Voltage
Supply voltage U
S
AC/DC 77...264V
Operating range of U
S
AC
0.85 ... 1.1 x U
S
Frequency range for AC
50 ... 60 Hz
Max. power consumption
3.5 VA
Alarm Response Values
Alarm set-point value I n1
(RCMA473L6, Class A)
6 mA
- Frequency range
0...150 Hz
Response time
Inverse time curve as per UL943
Hysteresis
25% of the response value
Measuring Circuit
Current transformer, external
W2-A62B
Alarm Relay
Type
1 electronic switch & 1 SPDT contact
Rated contact voltage
AC 250 V/DC 300 V
Rated current for SPDT contact
UC 5 A
Breaking capacity:
- AC 230 V and p.f. = 0.4
AC 2 A
- DC 220 V and L/R = 0.04 s
DC 0.2 A
Operating mode
Normally Energized (S1/S2)
Testing
EMI test:
- Electrical disturbance test
EN 50082-2
- ESD
IEC 801-2/EN 60801-2
- EM field
IEC 801-3
- Burst
IEC 801-4
- Surge
IEC 801-5
Dielectric test:
- Test voltage
2 kV
- Impulse voltage test
IEC 255, Class III
- Electrical disturbance test
IEC 255
Disturbance transmission
EN 50081-1
Emission
EN 55011 / CISPRII
Shock resistance
IEC 41B(CO)38 class I
Bumping
IEC 68-2-29
Vibration amplitude
IEC TC41B class I
Environmental Conditions
Ambient temperature, during operation
-10
°
C ... +55
°
C
Storage temperature range
-40
°
C ... +70
°
C
Climate class according to IEC 721
3K5, without condensation
General Data
Type of connection
screw terminals
Wire size
- solid
14 AWG
- stranded
16 AWG
Rapid mounting
DIN #3 rail EN50022
Screw mounting
90.7 x 64.8 mm centered
Protection class acc. to DIN 40050
- Internal components
IP30
- Terminals
IP20
Type of housing
X470
Weight approx.
1 lb
PLEASE NOTE: Check the label for correct supply voltage before applying
power to the unit. The ground conductor must not be passed through the
current transformer unless the ground conductor is to be monitored by itself.
Before starting the operation, it is recommended to carry out a functional test
by applying a ground fault via a suitable resistance. Electrical equipment
should only be installed by qualified personnel and in compliance with
current safety regulations.
The RCMA473L6-33 has an internal DIP
switch which allows the user to change the setpoint to 20mA (Class C).
This option may be used in systems where 6mA setpoint is not possible.


Ordering Information:
RCMA473L6-33
Article No. 94042040
W2-A62B
Article No. 911758
Other supply voltages are available on request RCMA473L6-33
W2-A62B
Wiring Diagram
W2-A62B Current Transformer Dimensions
Bender Inc. -
700 Fox Chase - Coatesville, PA 19320 - Toll-free: (800) 356-4266 - Fax: (610) 383-7100
A1 A2
11 12
14
ALARM
ON
RESET
R1
S1 S2
R2
k1
l
2
10
50
100%
RCMA Serie 473
I n
6 mA
reset button
short-time pressing (<1s) = Reset
power On LED flashes in case
of CT interruption, defective CT
or when the response value is
exceeded.
US Supply Voltage see label on unit
Fuse 6 A
A2
A1
R1/R2 external reset button
k
2
l1
alarm relay switches when
the response value is
reached
11
14
12
control voltage
example: 120VAC
S1
S2
transistor output closes
when the GFCI is energized.
Interrupts the main (power)
contactor when the
response value is reached
control voltage
example: 120VAC
C1
Main (power)
contactor
L+
L-
L1
L2
L3
N
GND
external measuring
current transformer
DC
AC
max. 30
Yellow
- Spare
Yellow
- Spare
RED
- to k1 on RCMA473
ORANGE
- to k2 on RCMA473
BLACK
- to l1 on RCMA473
BROWN
- to l
2
on RCMA473
Loadside
Od = 110mm
Id = 62mm
Width = 25mm
45mm
42mm