P&B MPC2000+ Technical Manual page 20

MPC2000+ Technical Manual
Earth Fault Alarm
This setting range 1-100% FLC in steps of 1%, with a default setting of 5% specifies the level of earth fault current
before an alarm occurs.
Earth Fault Alarm Delay
This setting is used to select the time between an earth fault being registered and an alarm signal being activated.
Range 1-60 seconds in steps of 1s with a default setting of 10s.
Earth Fault Trip
This setting range 1-100% FLC in steps of 1%, with a default setting of 10% specifies the level of earth fault current
before an trip occurs.
Earth Fault Trip Delay
This setting is used to select the time between an earth fault being registered and an trip signal being activated. Range
0-2 Seconds with a default setting of 0.5s.
Current Inhibit
This setting, range Off, or 400-1000% FLC in steps 10%, with a default setting of 'off', determines the level at which
the Earth Fault feature will be inhibited from operating. This feature does not inhibit the Thermal Overload protection.
Start/Stop Signal
This setting, range 'Momentary' or 'Maintained' with a default setting of 'Momentary', determines if the Local Start A
and Start B inputs use Momentary or Maintained contacts. In the Maintained mode Hardwired Start, Hardwired Stop
and Auto-Restart are disabled.
Starting Method
Selectable between Direct on Line, Star/Delta, Reversing, Two Speed and Circuit Breaker Control. Certain menu's
will be displayed when a Starting Method has been selected pertinent to that selection. For instance when the Starting
Method is Two Speed the operator will be required to enter values for Low Speed Motor FLC and Low Speed t6X
Time. When Star/Delta is selected the unit requests values for: Maximum Time in Star, Transition Time and Star to
Delta at a percentage of FLC. For further details see section 16.
Max Time In Star
This setting, with a range 1 to 60 Sec in steps of 1 determines the maximum time that the relay can be in Star when
starting a motor.
Transition Time
This setting, with a range 0.05 to 2.0 Sec in steps of 0.05 determines the time of a change over from Star to Delta in
the starting of a motor.
Star To Delta
This setting, with a range of 40 to 200% of FLC determines the current of the motor when the change of Star to Delta
occurs. If this current is reached before the Maximum Time In Star then the changeover occurs. Otherwise the
changeover occurs after the Maximum Time In Star.
Designate Aux. 1
This setting , range Alarm, Slave to Contactor A, Slave to Contactor B or Star/Delta Start/Run output, with a default
setting of 'Alarm', determines the use of the Aux 1 relay. When used as an Alarm relay, the relay is normally energised
and is therefore Fail-safe.
Aux.1 Delay
This setting range 0-120s in steps of 1s, with a default setting of 0, allows the user to set a time delay on the operation
of Aux 1 relay.
Page 16 ISSUE 7 28/9/99 P&B Engineering