CTR0343E 115AMP Tripol Contactor

Description

Trane CTR0343E 3P Pole Contactor 115 AMP

Trane CTR0343E 115 AMP Tripol Contactor

• Trane Chiller 3P Pole Contactor
• TeSys D Contactor – 3P(3 NA) – AC-3 – <= 440 V 115 A – 110 V AC
• Contactor Application: Motor Control / Resistive load
• Control Circuit Voltage: 110 V AC 50/60 Hz
• Auxiliary Kontak Regulation: 1 NA + 1 NK
• Coil Technology: Built-in bi-directional peak limiter diode suppressor
• Nominal Operating Current: 115 A 60 °C) at <= 440 V AC AC-3 for power circuit
• Control circuit Type: at AC 50/60 Hz
• Model Number: LC1D115F7
• Trane Part Number: CTR0343E
• Commonly Used on: Trane RTAC, RTAD and RTAF Chiller models
• Replaces / Supersedes: CTR-343E

Most induction motors are started directly on line, but when very large motors are started that way, they cause a disturbance of voltage on the supply lines due to large starting current surges. To limit the starting current surge, large induction motors are started at reduced voltage and then have full supply voltage reconnected when they run up to near rotated speed.

One of the methods used for reduction of starting voltage is Star Delta starting;

Working Principle of Star-Delta Starter

This is the reduced voltage starting method. Voltage reduction during star-delta starting is achieved by physically reconfiguring the motor windings as illustrated in the figure below. During starting the motor windings are connected in star configuration and this reduces the voltage across each winding 3. This also reduces the torque by a factor of three.

After a period of time the winding are reconfigured as delta and the motor runs normally. Star/Delta starters are probably the most common reduced voltage starters. They are used in an attempt to reduce the start current applied to the motor during start as a means of reducing the disturbances and interference on the electrical supply.