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Device description
2.7 Accessories
Carrier voltage transformer
The transformer for carrier power supply must meet the following requirements:
● Output voltage: 42 V AC at rated current
31 V AC to 48 V AC (42 V AC -26%/+15%)
● Insulation: Basic isolation of primary and secondary winding to parts that can be touched
(e.g. core) 500 V; overvoltage category III
Reinforced isolation or double isolation from primary to secondary end for 230 V;
overvoltage category III
Degree of pollution according to mounting position (usually VG 2)
The associated product standards are available in the section CE conformity (Page 127)
● Recommendation for rated current: min. 1.0 A
The transformer must be large enough so that it can supply sufficient current for the
maximum number of possible PLBs. The current consumption of a PLB at the powerline
connection plug is about 4 mA (at 42 V AC).
If the voltage tolerance of the supply network is in a range from -26% to +15%, we
recommend that you use the transformer in the example below.
Table 2- 7
Example of a transformer for supply of the carrier voltage
Primary voltage
Secondary voltage
Secondary current
Rated power
Manufacturer
Order designation
Details on installation of the transformer are available in the section "Rail connection of the
master and carrier power supply (Page 48)".
Circuit breaker
To prevent overheating of the cables and the transformer in case of a short-circuit, the cable
must be protected with an automatic circuit breaker at the primary and secondary end.
Select the circuit breaker so that the supply transformer, its supply cable, and all
downstream components and cables are protected. The following table lists components that
match the carrier voltage supply used as an example in this manual.
Table 2- 8
Circuit breaker, primary/secondary
Circuit breaker
Primary (when using TAM3242-
8JV00-0EA0)
Secondary
30
230/400 V AC
42 V AC
1.5 A
63 VA
mdexx
TAM3242-8JV00-0EA0
Technical require-
ment/Recommendation
2-pole, 1 ampere, tripping charac-
teristic B
2-pole, 2 amperes, tripping char-
acteristic B
Product example
SIEMENS 3RV1011-1BA10
(1): SIEMENS 5SY4202-5 (2-pole, 2A, A char-
acteristic)
(2): SIEMENS 5SY4202-6 (2-pole, 2A, B char-
acteristic)
Operating Instructions, 11/2019, A5E36203125A-AG
Power Line Booster
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