Sharp R-880D Manual de Instruções descarregar pdf (Página 68)

STP-200/300/400 Series Instruction Manual

6 Safety Functions When an Abnormality/Error Occurs

The STP pump is provided with safety functions for various abnormalities/errors

(See Table 6.4, "Safety Functions.")

For troubleshooting, see Section 6.2, "Restarting after Any Safely Function

Operates" and Section 15, "Troubleshooting."

6.1 Safety Functions

6.1.1 Power Failure

<Ⅰ. Operation at a Power Failure>

When the power voltage drops below approx. 85% of the rated voltage due to a

power failure, the internal battery of the STP control unit automatically activates

to supply power to the STP pump in order to maintain normal function of the

magnetic bearing (backup operation during a power failure).

1) The STP control unit detects any power failure of 50 milliseconds or more and

automatically switches to the BATTERY OPERATION mode. The STP

pump decelerates and the rotor lands on the touch down bearing and stops at

approx. 3,000 rpm.

In the BATTERY OPERATION mode, the "BATTERY OPERATION" lamp

and the "EMERGENCY OPERATION" lamp light, and the alarm signals

with the same names as those of the lighting lamps are output from

REMOTE CONNECTOR pins (10)-(22) and (7)-(19)regardless of MANUAL or

REMOTE OPERATION mode.

When the rotor lands on the touch down bearing, the "BATTERY

OPERATION" lamp and the "EMERGENCY OPERATION" lamp go out, and

the alarm output is reset.

2) In case of a power failure of less than 50 milliseconds

, the STP control unit

does not detect it and the STP pump continues rotating.

◇ Depending upon the condition of the STP control unit, it may detect a

power failure of approx. 35 milliseconds to less than 50 milliseconds.

For details, see <Ⅱ. Operation after a Power Recovery>.

6-1

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Sharp R-880D Manual de Instruções Página 68