13.07.2015 Views

IPCX Chillers - Dunham-Bush Americas

IPCX Chillers - Dunham-Bush Americas

IPCX Chillers - Dunham-Bush Americas

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

UNIT FEATURES: CONTROL & STARTER PANELS○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○<strong>IPCX</strong> packages are available with several types ofcompressor motor starting methods, depending onvoltage, for Remote Mounted and Unit Mountedapplications. All unit mounted starters are supplied inNEMA 12 enclosure. The unit controller and all otheroptions are in a separate enclosure.Unit mounted WYE-Delta Starters and Solid StateReduced Voltage are available for 460/3/60, 575/3/60and 400/3/50 voltage applications and are supplied fullyinstalled and wired with all starter options ordered. Allstarters include control transformer with primary andsecondary fuses, oil pump starter, oil pump overloads,undervoltage relay, and current transformer forcompressor motor load control.Remote mounted WYE-Delta Starters and Solid StateReduced Voltage starters are supplied for 460/3/60, 575/3/60 and 400/3/50. Across-The-Line Starters are suppliedfor medium voltage 2300/4160/3/60 and 3300/3/50applications.Solid State Reduced Voltage StartersUnit MountedSolid State Starters are unit mounted and wired in a NEMA12 enclosure, and offer many standard features:• Microprocessor controller• Bypass contactor for eliminating SCR heat generation• Programmable starting profiles• Controlled inrush current and torque• Stepless acceleration to full speed• Adjustable acceleration rate• Programmable motor protection• Under/over voltage and phase monitoring• Electronic overloads• Motor short circuit protection• Instant over current protection• Current imbalance• Ground fault interrupt• Embedded diagnostics• Integral display• Digital metering• Built-in self testing• Pending fault indicatorOptions• Unit Mounted Circuit Breaker—with disconnecthandle extended through the door• Unit Mounted Fused Disconnect—handle extendsthrough the door• Door Latch Solenoid—for power and control panelsSolid State Starters DBRSM6B are microprocessorcontrolledsolid state reduced voltage with easy-to-usekeypad interface. They operate on a user-programmedclosed-loop current ramp for optimum motor control andprotection.Solid State Starters are an excellent method of soft motorstarting, through solid state ramp control of voltage,current, speed and torque. The effect/benefit of the softstart is a reduction of both electrical and mechanical systemstress. This special solid state ramp control is shown in thefollowing diagrams.Programmable Ramp ProfilesPercentVoltage100%InitialTorque600%300%Initial Current100%0TorqueFullLoadTorqueMotorCurrentMax. AdjustedCurrent0 15Ramp Time (sec)DBRSM6B"Soft Start"Full VoltageStartAccelSpeed (RPM)Time (Seconds)FullSpeedProgrammable Speed / Torque CurvesTime(Sec)ProgrammableAccelerationTorqueTypical LoadStandard Features of the DBRSM6B Starter• Electronic Motor Overloads are Class 10, with 115%overload service factor for the DBRSM starters.• Initial Current is the starting point for the currentramp. It can be set between 50-400% of the motorFLA. This must be set so the motor starts turning whena start command is given.• Current Limit is the maximum motor current limitwith an adjustable current range from 200-600% ofthe full load current. This reduces the starting currentto limit brownout conditions during starting.Run9

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!