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STP-200/300/400 Series Instruction Manual

Table 6.3 Operations of the STP Pump after a Power Recovery

(during REMOTE OPERATION)

Remote signal input after a

power recovery

Power failure

time

Number of

rotations after

a power

recovery

POWER ON

signal

START

signal

STP pump's operation

after a power recovery

Yes/No Yes Reacceleration

3,000rpm or

Yes/No No Deceleration/Stop

Yes No Re-levitation

Yes Yes

Re-levitation,

reacceleration

Approx. 50msec.

or more

Less than

3,000rpm

No Yes/No POWER OFF state

Yes Yes/No Continues as before.

No Yes Reacceleration

3,000rpm or

No No Deceleration/Stop

Yes Yes

Re-levitation,

reacceleration

Yes No Re-levitation

Approx. 35msec.

to less than

50msec.

Less than

3,000rpm

No Yes/No POWER OFF state

Less than

approx. 35msec.

Continues as before.

6.1.2 Abnormal State of Magnetic Bearing

When the magnetic bearing does not function normally due to a breakage of the

STP connection cable, disconnection of connectors, or any abnormality/error of

the STP control circuit, the rotor falls on the touch down bearing, and the STP

pump stops.

The "EMERGENCY OPERATION" lamp lights.

◇ When an abnormality/error occurs in the magnetic bearing, check the

STP pump as well as the STP control unit, and contact Service office.

6-4

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