Altra Industrial Motion Warner Electric PB-120 Руководство по установке - Страница 9
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If the friction materials have been saturated with oil
or grease, no amount of cleaning will be completely
effective . Once such a unit has been placed back in
service, heat will cause the oil to boil to the surface,
resulting in further torque loss .
Torque Loss: If a brake or clutch slips or loses torque
completely, the initial check should be the input voltage
to the magnet as follows:
90-Volt Series: Connect a DC voltmeter with a range of
0-100 or more directly across the magnet terminals . With
the power on and the potentiometer turned up, a normal
reading is 90 volts, although 85 to 95 is satisfactory .
The reading should drop as the potentiometer control is
adjusted counter clock wise .
24-Volt Series: Use a DC voltmeter with a range of 0-30
volts or more . A normal reading is approximately 22-26
volts .
6-Volt Series: Use a DC voltmeter of approximately
0-15 volt range . A normal reading is from 5 .5 to 6 .5
volts .
The above checks normally are sufficient . Further checks
may be made as follows: Connect a low range ammeter
in series with one magnet lead . Correct amperage
readings for each coil voltage and unit size are found on
page 5 of this manual .
These readings are with the power on and condition
control in the maximum output voltage .
Ohmmeter checks should be made with the power off
and the circuit open (to be certain, disconnect one lead
to the magnet) . Average resistance readings are also
listed on page 5 of this manual . A very high or infinite
resistance reading would indicate an open coil .
If the above checks indicate that the proper voltage and
current is being supplied to the magnet, mechanical
parts should be checked to assure that they are in good
operating condition and properly installed .
Warner Electric • 800-825-9050
P-201-WE • 819-0480 9
Send Quote Requests to [email protected]
Call +1(800)985-6929 To Order or Order Online At Warnerelectricparts.com