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RSK - 84
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| RELAY ANNUNCIATOR
UNIT |
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| Application |
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The relay annunciator unit RSK 84 finds application in electric power
and industrial plants for light and audible annunciation of DC or AC supply
voltage failures in the circuits of protective and control and instrumentation
equipment. The loss of DC supply voltage is hereby annunciated by an AC
voltage, and opposite, the loss of AC voltage by a DC voltage. The RSK
84 unit contains six auxiliary relays of which four are employed for DC
voltage loss annunciation and two for AC voltage loss annunciation.
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| Description |
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The RSK 84 unit announces
the DC voltage loss in the following method: One of the four relays, Rei
to Re4 is to be connected to DC voltege the failure of which is being monitored.
The relays are energized and their contacts closed. One N.O. contact of
the relay receives via a diode AC voltage which charges the associated relay
capacitor, and the other N.O. contact receives AC voltage via the N.O. contact
of a push button. By depressing the push button, testing of the signal lamps
is effected. At a loss of DC voltage, the relay opens its contacts, and
via the first N.C. contact a dischargning of the capacitor takes place.
The energy stored in the capacitor is high enough to operate the horn relay
RTP-10 which, via its contacts energizes the horn, and the horn remains
on unitil a resetting command is given on the horn resetting push button.
The other N.C. .contact energizes the corresponding annunciator lamp which
remains on until the DC supply voltege is restored at the relay input.
The four DC relays enable, thus, to announce the loss of four DC voltages
at four separate busbars, or at four protective units, or the loss of four,
by their amount, different DC voltages.
The same method enables the announcement of AC voltege loss on the remaining
two relays Re5 and Re6.
This time the relays receive AC voltege, and their contacts receive DC voltage
which energizes the horn relay, now being a DC relay, and turns the annunciator
lamps on. The two relays are capable of announcing the loss of AC voltage
on two units or two busbars, or the loss of two, by their amount, different
AC voltages.
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| Features |
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The RSK 84 unit has a wide scope of application. It does not require
any inspection or maintenance; it is not susceptible to vibrations and
mounting position. It is housed into a standard housing for surface mounting,
see fig. 2. The employed auxiliary relays are high quality relays offering
a reliable perormance and long life. Printed circuit board wiring technique
has been applied, and easily accessible fast acting fuses arranged on
the printed circuit board under the unit cover are incorporated for the
protection. External connections of the unit are made on two terminal
blocks K1 and K2 containing each 12 terminals.
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| SPECIFICATIONS |
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Standard supply voltage of DC relays Up
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220 V=
110 V=
48 V=
24 V=
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| Standardni naponi napajanja of AC relays
Up |
220V
110 V
48 V
24 V
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| Number of circuits: |
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| for input signals |
6
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| for light signals |
6
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| for audible signals |
2
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| for lamp test |
2
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| Number of auxiliary relays |
4+2
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| Total number of terminals |
24
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| Power requirement |
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| for DC supply source 220V |
3W approx.
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| for supply sources of 24, 48 or 110V |
1,5W(VA) approx.
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| for AC supply source 220V |
3 VA approx.
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| Relay contact ratings |
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| maximum voltage |
250V
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| continuous current |
5A
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| current at make |
10A
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| breaking capacity for DC at L/R =40 ms |
20W
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| for AC at cos j = 1 |
1000VA
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| Protection |
IP42/DIN 40050
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| Ambient temperature range |
-10oCšš ¸
50oC
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| Test voltage |
2 kV, 50Hz, 1 min.
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| Mass |
2 kg approx.
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| Dimensions |
see fig. 2
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| How to order |
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- type and voltage of the auxiliary source of supply Up
- with non-standard versions specify the deviations from standard ratings.
For all inquiries please contact the manufacturer.
Subject to change without prior notice.
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