AEG Electrolux THYRO-A Operations Instructions download pdf (Page 10)

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2.5.2 LOAD MONITORING

(UNDERCURRENT MONITORING)

Thyro-S ... H RL1 is suitable for monitoring loads resulting from one or

several resistances in parallel or parallel series connection.

Thyro-S detects an increase in the load resistance. The load monitoring

operates as undercurrent monitoring on absolute values and is suitable

for use in the nominal operating mode 1:1, and with limitations in the

operating modes 1:2. 1:3 and 1:5.

The load monitoring is supplied with the default conﬁ guration OFF =

left stop R205 (=0)

For all other conﬁ gurations:

If the load current falls below the level set the error indication relay will

respond with a delay (4-10 sec depending on operating mode). The

result is indicated via an optionally connected bus system.

This can be set in accordance with the following table.

2.5.3 LOAD MONITORING

(OVERCURRENT MONITORING)

Along with undercurrent monitoring 2.5.2 the device also has over-

current monitoring. This can only be conﬁ gured using Thyro-Tool Family.

Deviating values are to be converted by percentage. The set monitor-

ing value should always be “midpoint” between the value with load

current and the value after interruption.

NOTE

Settings above 90% and below 10% are not practical. If low load cur-

rents are required, check whether a controller with a lower type current

can be used.

TAB. 1 LOAD MONITORING

NO. OF

PARALLEL

LOAD RESIS-

TANCES E.G.

NUMBER

LOAD NOM

TYPE/CONTROLLER

RESISTANCE

INCREASE IN

CASE

OF FAULT

RECOM-

MENDED

SETTING

FOR POTI

R205

POTI

REVOLU-

TIONS CA.

1 100% 50.0% 8.5

1 80% 40.0% 7

1 60% Infinite 30.0% 6

1 40% 20.0% 4.5

1 20% 10.0% 2.5

2 100% 75.0% 12

2 80% 60.0% 9.5

2 60% 100,0% 45.0% 7.5

2 40% 30.0% 6

2 20% 15.0% 3.5

3 100% 83.3% 13

3 80% 66.7% 12.5

3 60%

50%

50.0% 9

3 40% 33.3% 6

4 100% 87.5% 13.5

4 80% 70.0% 12.5

4 60%

33,3%

52.5% 9

4 40% 35.0% 6

5 100% 90.0% 14

5 80% 72.0% 11.5

5 60%

25,0%

54.0%

5 40% 36.0% 6.5

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 24 25

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AEG Electrolux THYRO-A Operations Instructions Page 10

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