TECHNICAL SPECIFICATIONS DESCRIPTION: - CENTAC COMPRESSOR 2

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Roxanne O’Brien’
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TECHNICAL SPECIFICATIONS DESCRIPTION: - CENTAC COMPRESSOR 2 Description: The Centac 2 compressor is a multi-stage (3-stage) centrifugal air compressor.

Major Component Breakdown: Three - stage compressor unit Electric motor Lubrication pump Bently Nevada and Yokogawa Programmable control system PLC for

Compressor Base Other Additional Technical Information: Multi-stage Centrifugal Compressor: Figure 1 - Centrifugal Multistage Compressor Ingersoll Rand Centac

1 TECHNICAL SPECIFICATIONS DESCRIPTION: - CENTAC COMPRESSOR 2 Description: The Centac 2 compressor is a multi-stage (3-stage) centrifugal air compressor. It has an output of approx 5000 to 6000 m 3 /hr (actual uncompensated volume displacement) at 550kPa. Major Component Breakdown: Three - stage compressor unit Electric motor Lubrication pump Bently Nevada and Yokogawa Programmable control system PLC for switchgear interlocking control (Modicon Momentum 171CCC ) Control panel HMI Screen for operations and diagnostics display Other auxiliaries The Compressor Base Other Additional Technical Information: Multi-stage Centrifugal Compressor: Figure 1 - Centrifugal Multistage Compressor Ingersoll Rand Centac Intake temperature: 35 C Cooling water temperature: 25 C Cooling water flow: 48 m 3 /hr Intake humidity: 60% Stages: 3 Typical Capacity: 6000 m 3 /hr Typical Discharge Pressure: 550kPa Inlet Actuator Type: Pneumatic (Nitrogen or compressed air)

air) Full Voltage Induction Motor Centac

Serial Number: 18253 Power: 35W Voltage:

2 BOV Actuator Type: Starter Type: Drive Type: Pneumatic (Nitrogen or compressed air) Full Voltage Induction Motor Centac Control Panel: HMI Schneider Electric (Square D, Telemechanique) HMI Type: Modicon Magelis Model Number: XBTF Serial Number: Power: 35W Voltage: 24Vdc Figure 2 - Control Panel HMI Yokogawa Single-loop programmable Controller: Yokogawa Figure 3 - Compressor Surge Controller

Type: Model Number: Single-loop Programmable YS100 series YS170 Bently Navada Compressor

Catalogue Number (rack): 3500/05-02-00-06-00 Modular Units: 3500/15 Power Supply 3500/42M

Modicon Momentum PLC Controller System Schneider Electric Modicon Momentum CPU Code:

170ADM-350-1X x2 Software Compiler: Concept 2.

3 Type: Model Number: Single-loop Programmable YS100 series YS170 Bently Navada Compressor Monitoring System (for stage vibration): Bently Navada Serial Number: 03K00R67 Job Number: Catalogue Number (rack): 3500/ Modular Units: 3500/15 Power Supply 3500/42M Proximitor/Seismic Monitor x2 3500/32 4-channel Relay Module x2 PLC Control System: Figure 4 - Modicon Momentum PLC Controller System Schneider Electric Modicon Momentum CPU Code: 171CCC IO types: DI (24Vdc), DO (24Vdc), AI (4-20mA IO Modules Map: 170AAI x2 170ADM-350-1X x2 Software Compiler: Concept 2.5 Language Type: IEC LL Communication Protocol: Modbus Ethernet (Compatible with TCPIP) (Interbus communication used for interlinking between IO Modules. Oil Circulation Pump:

Figure 5 - Prelube pump Frequency: 50Hz Voltage: 220Vac/380Vac Pole: 2 Phase: 3

Induction Motor Manufactured: UK 1976 Serial No: 255538/2 Specifications No:

4 Figure 5 - Prelube pump Frequency: 50Hz Voltage: 220Vac/380Vac Pole: 2 Phase: 3 RPM: 2810RPM Compressor Motor: Parsons Peebles Type: Squirrel Cage Rotor Induction Motor Manufactured: UK 1976 Serial No: /2 Specifications No: BS2613/1970 Frame: T4508J Rating Class: MCR Enclosure: CACA Weight: 5540kg Power Factor: 1.05kW/kVA Power Output: 895kW Rotational Speed: 2974RPM Output Connection: Star Frequency: 50Hz Phases: 3 Insulation: Class F Altitude: 1500m Figure 6 - Compressor Motor

Air Inlet Filter: Figure 7 - Air Inlet Filters Donaldson Type: Air Cleaners TTD-08 Serial Number: 1076-C Operations Summary; This compressor was installed prior to 2003 and served to provide around

It is equipped with a Bently Nevada monitoring system, which provided protection against surging (in conjunction with the Yokogawa Programmable controller), as well as to react to high vibration.

5 Air Inlet Filter: Figure 7 - Air Inlet Filters Donaldson Type: Air Cleaners TTD-08 Serial Number: 1076-C Operations Summary; This compressor was installed prior to 2003 and served to provide around 6000 m 3 /hr actual at 500kPa. This compressor is situated in the Compressor house 1, which is located in the Highveld Steel Steelwork premises. It is equipped with a Bently Nevada monitoring system, which provided protection against surging (in conjunction with the Yokogawa Programmable controller), as well as to react to high vibration. In addition to this, it is also equipped with a Modicon Momentum PLC controller for basic diagnostic interlocking. This PLC works in conjunction with the Magelis HMI for user interfacing. This compressor has an approximate running hours amount of Although the compressor underwent its required scheduled periodic maintenance sessions, minor and major, it recently developed a noise from within the compressor which resulted in higher than normal vibration readings. The compressor would have to be stripped, inspected and repaired before start-up. It is also advisable that the compressor be subjected to a major service as it has been offline for an extended period. Note: Whilst the Yokogawa Controller has the purpose to control the compressor operations in terms of anti-surge control (controlling the BOV and Air inlet valve positions) and also monitors vibration, the Modicon PLC controller has the function of interlocking the compressor operation based on diagnostic elements, such as prestart interlocks, cooling water flow rate etc.)

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