82.031.0101.0 WIELAND ELECTRIC, 82.031.0101.0 Datasheet - Page 441

• Manufacturer Part Number: 82.031.0101.0
• Description: COUPLING MODULE
• Manufacturer: WIELAND ELECTRIC

Specifications of 82.031.0101.0

• Connector Type: Modular
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Contact side – reduction of arcs
When the arc limit voltage (see diagram)
which is dependent on the switching
current and contact material is exceeded,
discharge processes take place on the
relay contact. Material transfer occurs
which damages the contact. To achieve a
long service life and a high level of
reliability despite this type of contact
loading, circuit elements are required for
arc suppression. Several options are
available.
Table 1: Overview of contact materials
Arc limit of pure contact metals
Contact material
Fine grained silver
AgNi0,15+ 5 µ Au
Oxid AgCdO10
Silver cadmium
Silver tin oxide
Gold silver
AuAg10 over
Gold nickel
Silver nickel
Hard silver
AgNi0,15
AgSnO10
AgNi+Au
AuAg10
AgCu3
AgNi10
AuNi5
Contact current [A]
Sulphur
no
no
no
no
yes
yes
yes
yes
yes
Attacked by
Gold
Silver
Copper
Palladium
Platinum
Tungsten
Rhodium
Oxidisation
switching
slightly
when
no
no
no
no
no
yes
yes
Low and constant contact resistance at
resistance to wear is five times greater
Low welding tendency, very high arc
capacities, low rate of material transfer
resistance, slight electric arcs occur at
D.C. circuits with a resistive load
An RC element which is connected in
parallel to the contact can be used for arc
suppression.
Behaves as 5 m gold contact but its
RC element parallel
At the point of disconnection, the voltage
Uc at the contact jumps from zero to the
value UxR/(R+R
to the function U
t=(R+R
high enough so that the combined total of
the condenser discharge current and the
switching current at start-up is less than
the maximum permitted starting current.
R>U / (I
contact follow-through, interference
tendency, greater contact resistance
Higher arc resistance, low welding
number of operations and greater
Higher mechanical strength, low
welding tendency and higher arc
resistance than fine silver but a
Free of material transfer in broad
Good corrosion properties, good
low switching capacities, higher
Higher mechanical strength, low
welding tendency and higher arc
Low welding tendency, high arc
resistance at greater switching
possible due to friction oxides
loading ranges, small contact
minimum switching capacity
resistance at high switching
resistance than Ag, relatively
greater contact resistance
smaller contact resistance
L
contact resistance
) x C. The resistance R must be
zul
Typical properties
U/R)
capacities
L
) and then rises according
c
=U (1-e
-t
/
T
) whereby
10
Universal use in medium-
voltage than gold nickel
capacities for dry circuits
-6
unfiltered communication
opening and closing, d.c.
switching inductive loads
Used in medium-sized
medium to high loads,
Switching circuits with
Particularly suitable for
sized loads at higher
Switching circuits for
W / VA up to 100 W / 1 kVA
Dry switching circuits,
medium voltage and
Switching capacity:
measuring circuits,
high loads during
Typical applications
Small switching
Used in low and
current ranges
d.c. circuit
circuits
At a switching frequency 1/T, the
capacitor should have discharged its load
again before the contact is reopened. This
is essentially guaranteed if C<T/2R has
been selected.
D.C. circuits with an inductive load
While the maximum switching voltage U
is applied when a resistive load is present
at the contact, voltage peaks that are
approximately 10 times as high can occur
in the case of an inductive load.
loads
Voltage characteristics at the relay
contact for inductive loads
routes
Glow, Shower,
Time
1 mA…300 mA
arc discharge
mA…300 mA
10 mA…10 A
µA…200 mA
1 mA…1 A
µV…30 V
100 mV…60 V
> 100 mV
mV…60 V
> 10 µA
>100 mA
>5 mA
>5 mA
Scope
>12 V
>12 V
>17 V
>12 V
>17 V
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