Operation - Renkforce 622412 Operating Instructions Manual

Controls
1 Control LED
2 Outlet for loads
Functional description
Many loads that are connecting to the public AC voltage network feature an inrush current
or starting current that is much higher than the rated current.
• Electrical engines of tools for example, such as a circular saw
• Power transformers
• Lamps with high power consumption (e.g. large halogen floodlights, construction spot-
lights)
The inrush current of such a device acts like a short circuit to the supply voltage. Light bulbs
in a cold state only possess approximately 7% of the internal resistance of the nominal

operation.

For small consumer loads (devices with low power consumption), this effect plays a subor-
dinate role. However, with large consumer loads with the rated current already close to the
values of the upstream mains fuse, this may be an issue.
The inrush current limiter prevents the mains fuse from responding (or tripping of the circuit
breaker) by a current limitation that is applied by a special pulse-resistant NTC series resist-
ance the moment the load is switched on.
After limiting the current peak at the moment the load is switched on, there are two different
modes of operation for the inrush current limiter:
1. The internally measured current is less than a equivalent apparent power of 20 VA. The
power relay does not turn on. In this case the NTC can sufficiently carry the required
current. The NTC heats up, whereby the resistance value of the NTC decreases. The
current increases until the stationary value is reached. Here, the resistance value of the
NTC is about 0.5 to 33 Ω.
This happens, for example, if only one load with low power consumption is connected
to the inrush current limiter, such as a power supply unit (or when the consumer is in
standby mode).
The control LED (1) is not on.
2. The internally measured current is greater than an equivalent apparent power of 20 VA.
After about 0.4 to 1 seconds, the internal power relay is switched; the consumer is thus
directly coupled to the power grid and the NTC is bridged so that there is no current limit.
So, for a period of 0.4 to 1 second the power consumption of the consumer is limited and
then it is coupled via the power relay in the inrush current limiter directly to the mains
network.
The control LED (1) lights up when the power relay is activated.
The inrush current limiter is suitable for virtually all power consumers with continuous cur-
rent ratings of up to 16A. It makes no difference whether these are resistive, inductive,
capacitive or mixed loads, because the current is limited by pure ohmic resistance.
The NTC has a nominal resistance of 33 Ω at an ambient temperature of +25 °C. Assuming
that the consumer represents a short circuit when turned on then the result is a maximum
inrush current of 7 A (formula: I = U/R, 230 V / 33 Ω = 7 A).
At this value a 16 A mains fuse (or a standard 16A circuit breaker) will normally not be trig-
gered.
However, the requirement is that the total nominal current of the mains fuse (or
circuit breaker) is not exceeded.
Especially in older electrical household installations, a single fuse (or a single
circuit breaker) for all outlets of a room (or even the entire apartment) is provided.
If for example, a vacuum cleaner and a portable circular saw are powered, the
inrush current limiter indeed does help against too high starting current let's say
for the vacuum cleaner. But the fuse (or circuit breaker) will still be triggered as
the total current of both devices is higher than the rated current of the fuse or
circuit breaker (usually 16 A).
In such a case, try to locate outlets for both devices that are connected to differ-
ent fuses/circuit breaker.
Preparation
The delivery contents include certain nameplates in different languages (English + Dutch).
Stick the language label in your language over the German language label on the back of
the inrush current limiter.
Operation
1
Step 1:
Plug the inrush current limiter (without the consumer load connected!) into a proper earthed
mains socket. Here, the control LED (1) briefly lights up in blue and then turns off again. This
inrush current limiter is now ready for use.
2
Step 2:
When the control LED (1) has turned off, plug the load into the AC outlet (2) of the inrush
current limiter. Turn on the load, if applicable.
Important!
Maintenance and cleaning
The product does not require any maintenance. You should not open/dissemble it. Repair or
maintenance work must be carried out by a specialist.
Before cleaning, disconnect the inrush current limiter from the power supply. To do this,
pull it completely out of the mains socket. Disconnect a connected load from the inrush
current limiter.
You can use a clean, dry, soft cloth for cleaning. Dust can be very easily removed with a soft,
clean brush and a vacuum cleaner.
Do not use aggressive, chemical or scouring cleaning agents, as this may lead to discol-
ouration or changes in the material on the surface.
Disposal
Technical data
Operating voltage...............................................230 V/AC, 50 Hz
Connection power..............................................max. 3680 W (230 V/AC, 16 A)
Suitable type of load .......................................... suitable for all consumers (resistive, inductive,
Protection class .................................................I
Protection degree ..............................................IP20, dry enclosed interiors
Child proof ...........................................................yes
Dimensions (H x W x D).....................................approx. 134 x 59 x 39 mm (without plug)
Weight ..................................................................approx. 180 g
This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau (www.conrad.com).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microfilming, or the capture in electronic data
processing systems require the prior written approval by the editor. Reprinting, also in part, is prohibited. This publication represent
the technical status at the time of printing.
© Copyright 2015 by Conrad Electronic SE.
Please observe the following sequence when you are connecting the inrush cur-
rent limiter and the load, or the inrush current limit will not work otherwise (basi-
cally caused by the NTC resistor)!
When the power relay in inrush current limiter is activated, the control LED (1)
lights up. Refer to the chapter "Functional description" for explanation about the
function of the LED.
Proceed as follows, if the consumer load is turned off (or was unplugged) and if
you want to switch it on again (or plug it in):
• Switch off the load (or disconnect it from the inrush current limiter).
Leave the inrush current limiter in the power outlet, do not pull it out.
• Wait until the inrush current limiter's power relay switches off and the control
LED (1) goes dark. The NTC resistor has to cool down for a few seconds so that
the inrush current limiter can be used again.
• After the waiting time switch the load on again (or plug it back on the inrush
current limiter on).
If you do not follow these instructions (no waiting time after switching off or un-
plugging and renewed switching on or plugging in of the load), the inrush current
limiter will not work and the fuse or circuit breaker will be triggered due to the
high starting current of the load.
The product must not be disposed of in the household waste.
Dispose of the product at the end of its serviceable life in accordance with the
current statutory requirements; e.g. return it to any suitable collection point.
capacitive, mixed forms)