US
Metric

Overview

Cat® Controlled Start Transmission (CST) drive systems optimize the use of power for maximum production capacities. Ever more powerful systems require ever more horsepower, heavier chains and faster conveyor speed with maximum availability. What was needed was a truly intelligent drive system for face conveyors, which led our engineers to develop the Controlled Start Transmission (CST) drive system meeting the following requirements: • Currently available power up to 1200 kW (1,950 hp) per transmission unit • Safe startup of the face conveyor • Full utilization of the installed power • Highly durable components • Compact dimensions • High level of efficiency

Specifications

Maximum Output Torque for a Short Duration (3 sec.)
221269.00 ft-lb
300000.00 N·m
Maximum Input Speed - Motor Speed
1,500 rpm @ 50 Hz (1,800 rpm @ 60 Hz)
Weight - Without Oil - In-line Drive System
8600.00 lb
3900.00 null

Shaft Design

Input Shaft - Cylindrical
DIN 5480-W 100×4×30×24
Output Shaft with Internal Toothing
DIN 5480-N 220×10×30×20

Requirements of Cooling Water

Maximum Water Inlet Temperature
25° C/298.15 K (77° F/298.15 K)
Required Cooling Water
5.28 gal/min
20.00 l/min

Dimensions

KP-30 CST - Height
35.40 in
900.00 mm
KP-30 CST - Length
89.80 in
2280.00 mm
KP-30 CST - Width
46.50 in
1180.00 mm
P-30 CST - Height
35.40 in
900.00 mm
P-30 CST - Length
55.10 in
1400.00 mm
P-30 CST - Width
37.80 in
960.00 mm

Typical Application

Description
Chain Type Longwall Machinery like Armored Face Conveyors (AFC)

Maximum Output Torque (for 3 sec) Tmax [N·m]

KP-30/P-30 CST
221269.00 lb/ft
300000.00 N·m
Rated Power P @ 50 Hz (n = 1,485 rpm) - Ratio i [-]: 16
500 kW
Rated Power P @ 50 Hz (n = 1,485 rpm) - Ratio i [-]: 21
500 kW
Rated Power P @ 50 Hz (n = 1,485 rpm) - Ratio i [-]: 24.4
500 kW
Rated Power P @ 50 Hz (n = 1,485 rpm) - Ratio i [-]: 28
500 kW
Rated Power P @ 50 Hz (n = 1,485 rpm) - Ratio i [-]: 33
500 kW
Rated Power P @ 50 Hz (n = 1,485 rpm) - Ratio i [-]: 39
435 kW
Rated Power P @ 50 Hz (n = 1,485 rpm) - Ratio i [-]: 50
400 kW
Rated Power P @ 60 Hz (n = 1,782 rpm) - Ratio i [-]: 16
816 hp
Rated Power P @ 60 Hz (n = 1,782 rpm) - Ratio i [-]: 21
816 hp
Rated Power P @ 60 Hz (n = 1,782 rpm) - Ratio i [-]: 24.4
816 hp
Rated Power P @ 60 Hz (n = 1,782 rpm) - Ratio i [-]: 28
816 hp
Rated Power P @ 60 Hz (n = 1,782 rpm) - Ratio i [-]: 33
816 hp
Rated Power P @ 60 Hz (n = 1,782 rpm) - Ratio i [-]: 39
710 hp
Rated Power P @ 60 Hz (n = 1,782 rpm) - Ratio i [-]: 50
653 hp

Capacity

KP-30 CST - Gearbox Weight - Without Oil
12783.00 lb
5800.00 null
KP-30 CST - Oil Quantity
132.00 gal (US)
500.00 l
P-30 CST - Gearbox Weight - Without Oil
8596.00 lb
3900.00 null
P-30 CST - Oil Quantity
66.00 gal (US)
250.00 l
Features

Startup

Load-sharing

Overload Protection

Motor Braking Feature

PMC™-D and PMC™-V

V-Drive Visualization Software

Field Experience

ICDS - Integrated CST Drive System

Sales Features

Startup

For soft-start and heavy-load startup, all drive motors run up to full speed at no load. Motors are always started sequentially, with the result that peak current and energy demand are very modest. When the last motor has reached full speed, pressure is applied to the CST clutch, increasing until the breakdown torque is reached if needed. As a result, the increase in pressure and motor load is synchronized during the startup phase and continues as the conveyor accelerates.

Load-sharing

Power consumption of each motor is constantly monitored to allow load-sharing between the individual drives. If a preset value is exceeded, slip at the drive with the greater power consumption is increased, causing the other drives to draw more power and equalizing power distribution again. The typical operating slip is normally below 0.2%.

Overload Protection

If the chain is jammed by large pieces of rock or trapped iron, the CST clutch is opened rapidly and the motor is switched off. To achieve this, the output speed is constantly monitored. Within milliseconds, the rotating mass of the gearbox - and particularly of the asynchronous motor - is disconnected from the conveyor chain sprocket. Communication between the drive control units allows all clutches to be opened simultaneously.

Motor Braking Feature

Occasionally - even during regular shifts - there is a need to interrupt production and shut down the AFC motors.

PMC™-D and PMC™-V

The PMC™-D and PMC™-V are members of the Cat PMC™ family of programmable mining controls. The PMC™-D controls drive applications such as face conveyors and overload protection gearboxes. The PMC™-V drives visualization.

V-Drive Visualization Software

This software visualizes all CST, tail drive and chain tensioning data. It allows changes to drive system parameters and monitors load-sharing, conveyor speed, clutch sensors, etc.

Field Experience

The CST drive system was applied for the first time in 1995 on a high production longwall face in the United States. Since then, well over 500 CST drive systems have been sold and are operating successfully in mines in the U.S., Mexico, Australia, Poland, China, Russia, Kazakhstan, the Czech Republic and Germany. The maximum total available power for the face conveyors is currently up to 3600 kW. All components - particularly the vital components within the supply unit and the CST clutch - have proven their reliability in a range of applications. The world’s highest capacity AFC (>6000 t/h) and the world’s longest AFCs in operation (nearly 500 m/1,640 ft) have been equipped with the Cat CST drive system.

ICDS - Integrated CST Drive System

The ICDS is the result of continuing cooperation between Caterpillar and Baldor Electric Company. It combines the tried-and-tested CST drive system for face conveyors with a newly developed special Baldor Electric motor with our new PMC™-D drive control system.