Water-Cooled Condensers - HTS

2.04 CHILLER COMPONENTSA. Compressors: The compressors shall be semi-hermetic, single rotor, rotaryscrew type with internal oil separator. The compressor motor shall be refrigerantgas cooled, high torque, induction type, two-pole, with inherent thermalprotection on all three phases and shall be mounted on RIS vibration isolatorpads.B. Electric Motors: Compressor motors shall be high torque, two pole, semi-hermetic,squirrel cage induction type with inherent thermal protection on all three phasesand cooled by suction gas. Full-load power factor shall be, at minimum, 0.90.Motors not meeting this minimum power factor must be capacitor-corrected to 0.90or better.C. Solid-State Motor Starters (each compressor): Starter shall be designed using thecurrent generation of reliable solid-state technology. Each starter shall providecontrolled motor acceleration and deceleration, and shall provide protection for thefollowing conditions: ground fault, phase rotation, electronic thermal overload,over/under current, stalled motor, single phase, high load current and currentunbalance. Across-the-line or wye-delta starters are not acceptable. Acceptablesolid-state starter manufacturers are GE, Cutler-Hammer, Benshaw or Reliance.The solid state starters shall be capable of self-diagnostics, metering, and have anLED display to include the following operating and fault messages:Operating Messages:Line voltage not presentVoltage present, starter readyMotor acceleratingMotor at full speedMotor at full speed, ramp time expiredStop command received, motor deceleratingThermal overload has reached 90% to 99%Thermal overload at 100%, motor stoppedThermal overload reduced to 60%, motor can restartPasscode enabledPasscode disabledThermal overload content in percentageFault Messages:System power not three phasePhase sequence incorrectLine frequency less than 25 HzLine frequency more than 72 HzExcessive current unbalanceOperating parameters lostNo current after "Run" commandUndercurrent trip occurredOvercurrent trip occurredControl power too lowMotor stalled during accelerationExternal fault56 WGS 130A – 190A Catalog WGS-1