Emergency Transfer Load Manager

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Overview

The EXL is a wall mounted system that monitors and controls a single engine generator for in parallel with a single utility source. This cost effective alternative to switchgear mounted controls is designed for voltages from 208V – 32kV. The EXL will support Emergency Standby as well as Utility Paralleling.

Generator Sets Supported

Units:
Cat Engine-Generators C9-C32, C175, 3300, 3400, 3500, G3300, G3400 & G3500 C9-C32, C175, 3300, 3400, 3500, G3300, G3400 & G3500 Less
System Capacity 1 Generator Set & 1 Utility 1 Generator Set & 1 Utility Less
Voltage and Frequency 208V - 32kV, 50/60Hz 208V - 32kV, 50/60Hz Less

System Control Voltage

Utility and Generator Circuit Breaker 40A @ 120 Vac, 3A @ 480 / 600 Vac, 50 / 60 Hz 40A @ 120 Vac, 3A @ 480 / 600 Vac, 50 / 60 Hz Less
Maximum Control Voltage Range 18-40 VDC 18-40 VDC Less
Control Voltage Nominal 24 VDC 24 VDC Less
Control Relay Ratings 10A @ 110 VDC, 4A @ 225 VDC resistive 10A @ 110 VDC, 4A @ 225 VDC resistive Less

Environmental Parameters

Vibration and Shock 5 Hz to 9 Hz single amplitude 3.5 mm, 9-150 Hz fixed acceleration of 9.8 m/s² 5 Hz to 9 Hz single amplitude 3.5 mm, 9-150 Hz fixed acceleration of 9.8 m/s² Less
Humidity 0-95% Non-condensing Humidity 0-95% Non-condensing Humidity Less
Certifications UL 508A / cUL UL 508A / cUL Less
Storage Temperature -20°C to 60°C -20°C to 60°C Less
Control Panel Enclosure NEMA 12 Type (IP52) NEMA 12 Type (IP52) Less
Operating Temperature 0-55°C 0-55°C Less

Generator Protective Devices and Functions

ANSI Protective Devices 15/25, 27/59, 81 O/U, 32, 40, 50, 51 (Industrial Grade) 15/25, 27/59, 81 O/U, 32, 40, 50, 51 (Industrial Grade) Less
Accuracy Voltage L-L, Current Frequency (0.5%), Power, kW Power Factor, kVAR (1%)* Voltage L-L, Current Frequency (0.5%), Power, kW Power Factor, kVAR (1%)* Less
Metering V, A, PF, kVAR, kW, Hz, k/Whr, kVarH V, A, PF, kVAR, kW, Hz, k/Whr, kVarH Less

Utility Protective Devices and Functions

Metering Voltage L-L, Current Frequency (0.5%), Power, kW Power Factor, kVAR (1%) Voltage L-L, Current Frequency (0.5%), Power, kW Power Factor, kVAR (1%) Less
ANSI Protective Devices 15/25, 27/59, 81 O/U, 32, 47 (Industrial Grade) 15/25, 27/59, 81 O/U, 32, 47 (Industrial Grade) Less

Optional

Supplemental Hardware 25 Relay Additional Discrete Synchronization Protection for the Synchronizing Circuit Additional Discrete Synchronization Protection for the Synchronizing Circuit Less

Dimensions & Weights

Control Panel Dimensions 36"H x 24"W x"D (914mmH x 610mmW x 203mmD) 36"H x 24"W x"D (914mmH x 610mmW x 203mmD) Less
Control Panel Installation Wall Mount Wall Mount Less
Interconnect Control Wiring Top or Bottom Conduit Access Top or Bottom Conduit Access Less
Shipping weight (approximate) 192 lbs (87 kg) 192 lbs (87 kg) Less

General Features

  • Provides Automatic Control for One Genset and One Utility
  • Utility Paralleling including Power Import, Export, and Baseload mode
  • Closed Transition transfer to and from Generator Power
  • Supports Emergency Standby Mode
  • Easy User Programming of Custom Logic
  • Easy to Follow, Step by Step Installation and Start-up Instructions
  • Cat® Engine Generators Seamless Support for Diesel and Gas
  • State of the Art, Color Touchscreen Operator Interface

Description

  • Can be integrated into existing switchgear to provide a fully automated system
  • Direct access to Cat engine data
  • Complete metering and control from intuitive color touchscreen
  • Complete protective functions, with annuciation and alarm history
  • User programmable input and outputs
  • Supported modes of operation include:
    • Emergency Standby (Utility failure protection)
    • Utility Parallel, import power from grid
    • Utility Parallel, export power to grid
    • Utility Parallel, base load operations
    • Automatic Engine Generator Exercising
  • Password security assure system integrity
  • Closed transition to and from generator to minimize power interruptions
  • NFPA and 110 compliant
  • Comprehensive manual andation provided
  • NEMA 12 (IP52) rated wallmount cabinet, UL508A / cUL labeled
  • Building management system interface
  • Password security assures system integrity

User System Requirements

The EXL control system utilizes user provided electrically operated Generator and Utility circuit breakers. These circuit breakers should be provided with two (2) auxiliary contacts (1A & 1B), a bell alarm contact, a circuit breaker open circuit, a circuit breaker close circuit, and integral short circuit protection. The Generator and Utility must also be furnished with Voltage Sensing (3ph 3w or 3ph 4w) and Current Sensing (3ph, 5a Secondary).

Disclaimer

©2013 Caterpillar All rights reserved. Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication. CAT, CATERPILLAR, their respective logos, "Caterpillar Yellow," the “Power Edge” trade dress as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission

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