Insulation Guard IW1000
Insulation Guard IW1000
DC-components of the leakage currents could be appear without
insulation error in case of an asymmetric load during positive and
negatives half-waves. For example: Power controlled devices
which are operating in phase-angle control or as zero-crossing
switch (SSR- relays). Even frequency converters produce high DCleakage currents. With time optimized pulse measuring method of
the IW1000, DC-voltage-shares at the leakage capacities
measured during positive and negative voltage pulses will be
eliminated automatically by calculation. Therefor the measuring
method is qualified for AC-AC/DC and true DC-systems.
Connection examples
1-phase AC
●
●
●
●
●
Time optimized pulse measuring method
2 alarm outputs relay, 1 analogue output
Automatic and manual self test
Acoustic alarm in case of malfunction
Devices for railway vehicles and healthcare facilities
available
DC-power
3-phase (AC) without neutral wire
Characteristics
The isolation-guard IW1000 will be used for insulation-monitoring in
machines and systems with ungrounded voltage systems. The
universal design allows the monitoring of all AC - and DC -Systems.
Common informations
In well-insulated IT-systems (new installations) with a lot of
connected devices a high leakage capacity may occur due
grounded input filters, cable capacities etc. Common insulation
guards, working with pulse measuring mode, are running with fixed
pulse widths. For well operation, they must be adapted manually to
the actual leakage capacity of the system. There are also insulation
guards available, working with self adapting pulse width. However
these devices need a long measuring time because the result will
be at least available, when loading voltage will find its maximum
(no more change in load voltage). With the time optimized
measuring method of the IW1000, insulation resistance and
leakage capacity will be calculated after 2-time constants. Therefor
the reaction time of the IW1000 is very short. By applications of
modern signal processing-algorithms in the software and over
sampling-mode in connection with high signal-dissolution of the ADconverter, the IW1000 runs with high stability and reliable
measurement.
Comparison of the DC-measuring procedure with
the time optimized pulse measuring procedure of
the IW1000
3-phase (AC) with neutral wire
Characteristic curve 1, measuring time
Insulation resistance RF
t[sec]
Simple circuit of an insulation guard
with the DC-measurement method
Input rectifier of the power supply
Ce [µF]
Table 1
Insulation error at the transistor case of the
heat sink
pi-ma-IW1000_E V1.02-00
1
Technical data
Dimensions
Power supply
Supply voltage
: 230 V AC, 115 V AC, 24 V AC ±10 %;
16.8..33.6 V DC, 10.8..15.6 V DC
Power consumption : max. 4 VA
Operating temp.
: -10..+55 °C;
Option 01
: -25..+70 °C
Relative humidity : 75 % for annual mean in accordance with
DIN EN50155, 95 % for 30 days all year
continuously, seldom or low humidity doesn’t
lead to malfunctions or cancellations.
CE-conformity
: EN 60664-1, EN 61326-2-4, EN 50121-3-2,
EN 60068-2-1/2/6/27
add. for Option 01 : EN 50155 in following points: EN 61373,
EN 60068-2-27
Fire safety
: Fulfilment of fire safety requirements for
railway vehicles acc. to the basic standard
NFF16-101 paticulary (IEC) EN 60695-2-12
(Glow-wire testing temperature 850 °C) and
NFF16-102 particulary 6.2; 6.4; 6.5
Input
: 0..690 V AC/DC; ab UN >400 V
Unom
operation only with cover clamp permitted
Frequency range : 16 2/3 ..400 Hz
Measurement
(standard)
(health care)
: ± 40 V
± 20 V
Umeas max.
: ± 220 μA
± 110 μA
Imeas max.
Ri DC
: 180 kΩ (2 x 360 kΩ parallel)
Impedance Zi
: 180 kΩ (2 x 360 kΩ parallel) at 50 Hz
Operating values
AL1/AL2
: 1 kΩ..5 MΩ x 1,1 (1,1 kΩ..5,5 MΩ)
programmable
Accuracy
: ± 5 %, ± 1 kΩ in the range 1 kΩ..5 MΩ
Hysteresis
: 10..100 % of the setpoint programmable
Measuring time
: see table1
System leakage
capacity
: max. 500 μF
Display
: LCD Dot-Matrix, 2 lines 8 characters each,
character height 5 mm, with back light
Indicating range
: 1 kΩ..9.9 MΩ
Solution
1 MΩ..9.9 MΩ
: 0.1 MΩ
1 kΩ..999 kΩ
: 1 kΩ
Output
Relay SPDT
: < 250 V AC < 250 VA < 5 A;
< 300 V DC < 50 W < 2 A
Analogue
: 0..1 mA, RF (Insulation resistance)
Case
: Polyamide (PA) 6.6 , UL94V-0,
acc. to DIN EN 60715:2001-09
Weight
: approx. 390 g
Connection
: screw terminals 4 mm²
Protection class
: case IP40, terminals IP20, BGV A3
Connection diagram
Ordering code
1.
IW1000 -
1.
2.
3.
4.
2.
-
3.
-
4.
-
Model
1
2 inputs L1 + L2 ,
output 0..1 mA for ext. pointer instruments
3
as 1, for health care facilities
Supply voltage
0
230 V AC ±10 % 50-60Hz
1
115 V AC ±10 % 50-60Hz
4
24 V AC
±10 % 50-60Hz
5
24 V DC
16.6..33.6 V DC
6
12 V DC
10.8..15.6 V DC
Options
00
without option
01
device for rail vehicles
02
measuring time 1 s CE max < 200 µF)
Additional text above the display (3x50 mm HxW)
Accessories
KA-IW1000-1 terminal cover for Umeas > 400 V
IS96-DS-01 pointer instrument DIN 96x96 mm,
mounting depth 63mm
Pointer instrument IS96
2
pi-ma-IW1000_E V1.02-00
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising