Electrical Connection; Secure 3-Phase Motors; Connect Temperature Monitor - SystemAir Multibox MUB Serie Instrucciones De Montaje Y Servicio

7

Electrical connection

The electrical connection picture can be seen on the motor console.
NOTE
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The motors contain triple posistors. More than two posistor chains may not be switched in series, as this can lead
to undefined cut-outs.
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Maximum check voltage of the posistors, 2.5 V.
WARNING
Hazard from electrical voltage
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Electrical connection only by trained electricians or trained and instructed qualified personnel.
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Electrical connection in harmony with the valid directives.
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Avoid penetration of water into the terminal box.
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Pay attention to the 5 rules of electrical engineering:
–
clear (all-pole separation of an electrical system from live parts)
–
secure against switching on again
–
establish freedom from voltage
–
earth and short-circuit
–
cover or fence off neighbouring live parts.
Connect the electrical connection according to the circuit diagram on the motor console.
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CARE
Property damage as a result of overheating of the motor
»
The motor can overheat and be destroyed if the thermo-contacts have not been functionally connected.
»
Always connect thermo-contacts to a protective motor switching device!
Connect the thermo-contacts/posistor connections to a protective motor switching device.
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For plastic terminal boxes, do not use any gland bolt connections of metal.
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Lay the mains feed line from the outside through a bore.
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Seal the bore in order to guarantee the IP 54 protection class.
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Seal the bore against water penetration. Depending on the kind of cable duct, provide water drainage bores or use a sealing putty.
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Additionally seal the lid screw connections of plastic terminal boxes with sealing putty.
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7.1

Secure 3-phase motors

Avoiding two-phase running:
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In 3-phase motors, use an all-pole C- or K safety cut-out (current consumption, see name plate).
7.2

Connect temperature monitor

If a temperature monitor is used, it must be connected to a triggering device and/or a motor-protection device.
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