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ir470ly"-A" Bender Industrial Products - 700 Fox Chase - Coatesville, PA 19320 - Toll-free: (800) 356-4266 - Fax: (610) 383-7100
s
Insulation Monitoring Device for Ungrounded Single
and Three-Phase AC Systems up to 690V
s
High-voltage coupler connection for AC to 6 kV
s
Built-in LED chain display indicating k level and
optional external 400
µ
A analog k -meter
s
Connection monitoring
s
Steplessly adjustable alarm set-point range selectable
from 1k ...200k s
Operation and alarm LEDs
s
Two voltage-free change-over alarm contacts
s
Compact housing with transparent cover which limits
access to the settings
s
Combined Test / Reset button
s
Two Year Warranty
GROUND FAULT MONITOR
IR470LY-4..
Page 1 of 3
1.3 - 8.1A / Feb 2000
Product Description
The classic power supply system is a standard AC system. It
contains neither converters nor DC components and system
leakage capacitance is relatively low.
The BENDER Ground Fault Monitor IR470LY-4.. series can be
used to montior these systems, up to 690V. For setting the alarm
setpoint value, you can choose from two response ranges, either
1...20k or 10...200k . If the response range 10...200k is
selected, the IR470LY-4.. in combination with a high-voltage
coupling device can be used for systems with higher voltages up
to 6kV.
The class='doin' >monitors are designed for mounting in control and distribution
panels using DIN #3 rail according to DIN EN 50 022 or for screw
mounting.
Operational Information
The IR470LY class='doin' >monitors the insulation resistance of on-line single
and three-phase ungrounded AC systems. A DC measuring
voltage is superimposed on the system by the device. The
terminals L1 and L2 (or "AK" via the high-tension coupling unit) are
connected to the system conductors. Terminals " " and "KE" are
connected to the equipment grounding conductor or equivalent.
The measuring circuit is completed by the insulation resistance
between the system and ground.
A green LED indicates that the insulation monitor is ON. The LED-
chain and/or an external analog meter (if connected) displays the
insulation resistance to ground in k . The alarm set-point is
steplessly adjustable and selectable from 1k ...20k or
10k ...200k . For pure AC faults, both built-in ground fault alarm
LEDs activate and the output relay "K1" energizes (N.D. mode)
when the selected set-point alarm is reached. For DC faults, the
LEDs indicate a positive or negative fault condition, but the alarm
sensitivity is greater than in pure AC systems. The relay can be set
to one of two modes: normally energized (N.E.) or normally de-
energized (N.D.) mode. If fault indication is to be stored, the
terminals LT1 / LT2 have to be bridged by a wire jumper or an
external reset button (NC contact). The IR470LY continuously
class='doin' >monitors the connections to the system conductors and to the
equipment ground.
The insulation monitor can be reset by pushing the reset button if
the insulation level increases 25% above the preset alarm set-
point value. The monitor can be checked by pushing the test
button. After pushing (>2 sec) the test button, the LED-chain and/
or the external meter (if connected) should indicate to 0 and the
alarm indication LED and output relay should activate.
for Ungrounded AC Systems from 0...690V
4
6
8
10
20
40
60 A1
A2
L1
L2
AK
PT
21
22
24
ALARM
TEST
RESET
KE
11
12
14
LT1 LT2
M+ M-
2
+
-
ON
20
1
k x1 kOhm
x10 kOhm
~
A-ISOMETER®
Serie 470
k 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
Dimension Diagram (mm)
Dimension Diagram (mm/inch)
DIN Rail mounting as per DIN EN 50 022
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") Bender Industrial Products - 700 Fox Chase - Coatesville, PA 19320 - Toll-free: (800) 356-4266 - Fax: (610) 383-7100
Page 2 of 3
1.3 - 8.2A / Feb 2000
Technical Data IR470LY-4..
Insulation
Rated insulation voltage
AC 630 V
Rated impulse voltage / disturbance grade
6 kV/3
Hi-pot test
3kV
Operation class
continuous operation
Monitored System
Rated system voltage
AC 50...400Hz 0...690V
Operating range U
N
0 ... 1.15 x U
N
Supply Voltage
Supply voltage U
S
see "Ordering Guide"
Operating range U
S
AC 0.8 ... 1.15 x U
N
Alarm Response Value
Response value R
ALARM
selectable
Range x 1k 1...20k Range x 10k 10...200k Response time (R
E
=0.5 x R
ALARM
and C
E
=1
µ
F)
Range x1k < 3 sec
Range x10k < 1 sec
Max. mains leakage capacitance
20
µ
F
Measuring Circuit
Measuring voltage U
M
(peak value)
40 V
Measuring current I
M
200
µ
A
Internal DC resistance R
I
200 k Impedance Z
I
at 50Hz
180 k Max. admissible stray DC voltage U
eff
DC 800V
Outputs
External Meter / Scale Midpoint (SKMP)
120k Current output (max. load)
400
µ
A class='doin' >(12.5k )
Terminal [AK] for high-tension coupler
yes
Alarm Relay
Switching components
1 voltage-free DPDT contact
Rated contact voltage
AC 250 V/DC 300 V
Rated current
UC 5 A
Break capacity AC 230V, p.f. = 0.4
AC 2 A
Break capacity DC 220 V and L/R = 0.04 s
DC 0.2 A
Operating mode
Normally Energized / De-energized
Adjustment by factory
Normally De-energized
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
2kV
- 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 centers
Protection class acc. to DIN 40050
- Internal components
IP30
- Terminals
IP20
Type of housing
X470
Weight approx.
1 lb
Ordering Guide
Type
Supply voltage
Art. No.
U
S
IR470LY-4013
AC 120V
910 48011
IR470LY-40
AC 230V
910 48007
IR470LY-4011
AC 24V
910 48012
IR470LY-4012
AC 48V
910 48002
IR470LY-4015
AC 400V
910 48008
IR470LY-4016
AC 500V
910 48018
IR470LY-4017
AC 690V
910 48017
IR470LY-4021
DC 10..84V
910 48006
High Voltage Couplers
Type
System Voltage
Art. No.
U
S
AGH204S-4
AC 0...1.5kV
914 013
AGH520S
AC 0...6kV
913 033
Panel-mount External k Meters
Type
Dimensions
Art. No.
7204-1421
72 x 72mm
986 763
9604-1421
96 x 96mm
986 764
Note:
Setting the adjustment range for the built-in LED meter:
Changing the setting range from x1k to x10k , automatically
changes the indication of the k values on the LED bar graph:
Setting range x1k :
Meter scale point x1k Setting range x10k :
The meter scale has to be multiplied by 10k
Bender Industrial Products - 700 Fox Chase - Coatesville, PA 19320 - Toll-free: (800) 356-4266 - Fax: (610) 383-7100
IR470LY-4..
Wiring Diagram
Page 3 of 3
1.3 - 8.3A / Feb 2000
L1
L2
KE
L1
L3
PE
L2
3 AC system
L1
L2
KE
L1
L3
PE
L2
N
3 N AC system
22
24
21
Output relay ALARM
N/O operation (pre-set by factory)
N/C operation
M+
M-
external k meter
LT1
LT2
PT
external reset button
or wire jumper for fault
memory
external test button
4
6
8
10
20
40
60 A1
A2
L1
L2
AK
PT
21
22
24
ALARM
TEST
RESET
combined
test and reset button
short-time pressing (<1s) = Reset
long-time pressing (>2s) = Test
Alarm LEDs illuminate when the insulation
resistance falls below the pre-set response value
and flash in case of interruption of the connecting
leads /KE or L1/L2
k -LED bar
graph indicator
KE
11
12
14
LT1 LT2
M+ M-
2
+
-
ON
20
1
k Power On LED
Potentiometer for the adjustment
of the response value R
ALARM
Operating principle
of the output relays
Range setting
R
ALARM
x10 kOhm
N/O operation
x1 kOhm
N/C operation
120
k
A1
A2
U
S
see nameplate
L1
L2
KE
L1
L2
PE
AC system
x1 kOhm
x10 kOhm
~
11
12
14
AGH ...
AC >690 V with
coupling device
AK
L1
L2
L1
L2
Important note:
The IR470LY... is suited for both single and three phase AC
systems. As indicated in the wiring diagram, there are several ways
of connection. From the metrological point of view, it is irrelevant
whether the connections L1 and L2 are connected to one or two
different system conductors or to the N-conductor. L1 and L2 have
to be led separately. Before connecting the device, the maximum
rated voltage has to be considered.
The terminals KE and also have to be led separately.