14 INSTALLATION AND MAINTENANCE MANUAL PUBLICATION DATE 07/04 513289
1. Earth leakage trip
2. Laundry electrical switchboard
3. Power supply protection
4. Washing machine
5. Phase conductors
6. Protective conductor
7. Main switch inlet terminal switchboard
Fig.4.4.A. Recommended machine connection to electrical network
(with an earth leakage trip)
INLET CONDUCTORS AND POWER SUPPLY PROTECTION
– Fuse: fuses the circuit (non automatically), another fuse has to be put into the socket when blown.
– Automatic circuit breaker: fuses the circuit (automatically), a switch must be placed on „ON“, it switches
OFF automatically when short-circuit or over-current occurs. It must be switched ON manually.
– Earth leakage circuit breaker: detects loss current to the ground PE (100mA).
Inlet conductors of the machine connection to the electrical network must have copper cores. The inlet
conductors cross section depends on the voltage and the machine heating type, i.e. total electrical input.
The inlet cable protection against a short-circuit fault and overloading must be performed by circuit breakers
or fuses in the laundry switchboard. Minimal cross section of the supply conductors recommended by the manufacturer
as well as the values of fuses are stated in tables 4.4.B - this value depends on short circuit protection - fuses/circuit
breaker. For the corresponding current see table in chapter „3.Technical specifications“.
Power supply
protection (A)
Automatic circuit
breaker (A)
Recommended
phase conductor
section (mm
2
)
Protection
conductor section
(mm
2
)
16 20 2,5 2,5
20 25 4 4
32 40 6 10
50 63 10 10
63 80 16 16
80 100 25 25
100 125 35 35
125 160 50 35
160 200 70 50
200 225 90 50
225 250 120 50
Tab. 4.4.B Manufacturer´s recommended minimal conductor section
PROTECTION WITH EARTH LEAKAGE TRIPS
To increase the safety of the operating personnel and / or servicemen during the maintenance work
and operation with electric devices it is recommended to mount in front of the supply cable in the laundry switchboard
an earth leakage trip according to fig.4.4.A, preferably with an actuating current 100 mA. The main contacts
of the protector must comply with the specified power input of the machine. The machine control circuits are
supplied by a dividing transformer; the earth leakage trip is determined for strong electric circuits i.e. motors,
heating elements, motor contactors, circuit breaker, main switch etc., see the inner connecting diagram
supplied with the machine.
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sales@groupdynamics.lv
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