METRON MP430 Series, Manual

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Standard and Optional Features
All photographs are typical and may not represent actual product supplied
Standard Features
Series MP430/MP435
Wye- Delta motors have all six leads brought out to the motor
terminal box. These leads are connected by the controller first in the
Wye configuration which draws only 33% of normal starting current
and develops 33% of normal starting torque. After a short time delay,
the controller then connects the motor winding in a Delta
configuration, applying full voltage and drawing full load running
current and developing full running torque.
With the MP430 open transition types, there is a very short period of
time where no voltage is applied to the motor during transition from
Wye to Delta connections. This condition can cause current surges
or disturbances being fed back into the main power source. The
magnitude of the surges is proportional to the phase difference
between the voltage generated by the running motor and the power
source. These transients can in some instances, affect other
equipment which are sensitive to current surges.
The MP435 closed transition types provide a smoother transition from
Wye to Delta by keeping the motor continuously energized during the
transition period. This is accomplished by means of resistors which
are connected in the circuit during the momentary period of transition
from Wye to Delta.
Metron Wye-Delta Controllers incorporate a mechanical as well as
electrical interlock to prevent the Wye connecting contactor from
being energized at the same time as the Delta contactor.
An emergency start lever to close starting contactor independent of
automatic control circuits. When used, this lever will bypass the
reduced current start feature and start the motor with full inrush
current drawn from the power source.
Operator Interface Device (OID) with LED Annunciator and
Digital Display
•
NEMA Type 2 drip proof metal freestanding enclosure
•
AUTO, MANUAL, TEST, and OFF mode buttons illuminated with
colored LED's for controller mode operation
•
Operator Interface Device (OID) with 4 lines by 20 character
display with large character backlit Liquid Crystal Display (LCD)
capable of being read in both direct sunlight or dark lighting
conditions
•
12 pushbuttons for easy screen navigation, system mode changes,
alarm reset, and horn silencing
•
Multicolored LED's for alarm and mode annunciation
•
Removable labels to allow for easy field modification of additional
alarms and/or language changes
•
All controller settings are programmable through the OID. All
features are enabled or disabled through the OID, no jumpers or
external wires are needed allowing easy field modification
•
The system status data shall be displayed on the OID. The
displayed items include: System pressure, Phase to Phase (AB,
BC, AC) voltage, Phase current (A, B, C), Current time and date,
Number of starts, Total motor run hours, Time remaining on
sequential motor start and motor stop timers.
•
Audible horn with silence feature for silencable alarms
•
Lamp test feature
•
English or Spanish languages selectable through the OID
•
Microprocessor based logic with real time/date clock capable of
running a minimum of 14 days without AC power connected to
controller
•
Non-volatile flash memory, that does not require the use of a
battery or external power. The flash memory permanently stores
the continuous pressure log, event log, alarm log and all user
changeable set points and system data.
•
Input and output status LED's provide visual indication of each
discrete input's or output's on/off status
•
One RS232 Serial Port
•
One USB 1.0 Port
•
One RS485 Serial Port
Auxiliary alarms:
The controller includes as standard six (6) discrete auxiliary inputs,
Nine (9) form 'C' auxiliary relay outputs. These auxiliary inputs and
outputs are in addition to those mandated by NFPA 20. All auxiliary
inputs, outputs, and OID LED's can be field programmed through the
OID.
Nine (9) of the following auxiliary alarms can be programmed and
recorded in the event/alarm logs and annunciated with an LED and
output relay contact for conditions such as:
LOW PUMP ROOM TEMP
RESERVOIR LOW
RESERVOIR EMPTY
RESERVOIR HIGH
FLOW METER ON
RELIEF VALVE OPEN
LOW SUCTION PRESSURE
HIGH PUMP ROOM TEMPERATURE
LOW FIREWATER PRESSURE
LOW PURGE PRESSURE
LOW GEAR OIL PRESSURE
HIGH GEAR OIL TEMPERATURE
GAS DETECTION
HIGH VIBRATION
EMERGENCY POWER ON