What is the function and electrical characteristics of the auxiliary switch, alarm switch, and overcurrent trip switch for the PowerPact P, R, and NS630b - NS3200 electronic trip circuit breakers?
PowerPact and Masterpact breakers
AUXILIARY SWITCH (OF)
An auxiliary switch is a single pole, double throw switch operated by the movable contact arm assembly. It is used to remotely indicate the position of the main circuit breaker contacts, whether open or closed.
ALARM SWITCH (SD)
An alarm switch indicates that the circuit breaker has tripped due to an overload, short circuit, or ground fault, the operation of a shunt trip or undervoltage trip, or the push-to-trip button. The alarm switch resets when the circuit breaker is reset.
OVERCURRENT TRIP SWTCH (SDE)
An overcurrent trip switch indicates that the circuit breaker has tripped due to an overload, short circuit, or ground fault. The overcurrent trip switch resets when the circuit breaker is reset.
These switches are available in low level versions (with gold flash plating) capable of switching very low loads (e.g. for controlling PLCs or electronic circuits).
Getting a PHF( input phase fault) on the ATV61 and ATV71 drives?
Drive error code displayed
PHF: input phase loss
This fault appears when an input phase is lost.
If 2 or 3 phase disappears while the drive is running, the drive will continue to run until the drive trips in another fault (USF for example).
This function could be disable by software with the parameter IPL=NO to supply the drive via the DC BUS voltage (range 230V and 480V).
Some drives (230V up to 7,5kW) have IPL=NO in factory setting because they can be supply in single phase.
Be careful, In the case where the motor is in generator mode then the fault doesn’t appear.
Be careful, the fault is stored in the EEPROM during a run.
Drive incorrectly powered or fuse opened.
Loss of one input phase.
Use of a single-phase input on a three-phase ATV71.
Check the power connections and the fuses.
Use a three-phase distribution network.
Inhibit the IPL fault (input phase loss).
ATV312 Safe Torque Configuration
All serial numbers for ATV312
No, the ATV312 does not have a Safe Torque Off option. That feature is only compatible with the ATV32, ATV320, ATV61, ATV71 , ATV630 and ATV940 drives
Programming RY Relay for Run Status on ATV212 Drives.
All models, all serial numbers
Need for a signal from the drive indicating that the motor is running.
Wire to RYA and RYC relay and program F130 to 14 (drive running). The relay will close if a run command is issued and there are no faults.
Amount of 9001KA1 contact blocks that can be used with 9001KS43B
9001 K and SK Selector Switches
30mm Push Buttons
Determine how many contact blocks they can mount on the back of a selector switch.
2 blocks mounted in tandem (for a total of four blocks): can be mounted on any 2, 3, or 4 position maintained selector switch (non-illuminated, illuminated or keyed).
Causes of an USF fault on ATV61 drives.
ATV61, ATV71, Altivar 61, Altuvar 71
The USF fault occurs when the DC bus voltage level drops below the threshold set in 1.8 Fault Management > Undervoltage Management > Undervoltage level.
For N4, 480V drives at factory setting of 480VAC, the threshold is 430VDC on the DC bus or 304VAC on the line terminals.
For M3, 240V drives at factory setting of 260VAC, the threshold is 230VDC on the DC bus or 163VAC on the line terminals.
For Y, 575V drives at factory setting of 690VAC, the threshold is 571VAC on the DC bus, or 404VAC on the line terminals.
- Measure the the incoming line to line voltages
- Compare the line voltage to the Mains Voltage as shown under Menu 1.2 Monitoring, and also the measurement of the DC bus voltage.
- If the standard line voltage is low, you can adjust the Mains voltage setting.
- Adjust the Undervoltage time out to compensate for line contactors, or add time delay before a fault would occur.