245-1295 Eng_Fre.Book

Instruction Bulletin
43134-017-02
8/96
Replaces 43134-017-01
(3/94)
Note: For MicroLim® Line Isolation Monitors used in Canada (catalog
no. MLIM), alarm level must be set to 2mA to meet CSA certification.
FEDERAL
PIONEER
MicroLim® Line Isolation Monitor
D Series
Class 4805

Bulletin No. 43134-017-02 MicroLim® Line Isolation Monitor
8/96
© 1996 Federal Pioneer All Rights Reserved
MicroLim is a Registered Trademark of Federal Pioneer Company.
IBM is a Registered Trademark of International Business Machines Corporation.
TORX is a Registered Trademark of Camcar Division of Textron, Inc.
MS-DOS is a Registered Trademark of Microsoft Corporation.
©1996 Federal Pioneer, all rights reserved. This bulletin may not be copied in whole or in part, or transferred to any
other media, without the written permission of Federal Pioneer.

© 1996 Federal Pioneer All Rights Reserved
MicroLim® Line Isolation Monitor Bulletin No. 43134-017-02
8/96
E
N
G
L
I
S
H
TABLE OF CONTENTS
SECTION 1—INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
What is the MicroLim® Line Isolation Monitor? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
SECTION 2—SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SECTION 3—RECEIVING, HANDLING, AND STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SECTION 4—INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Wiring to the Terminal Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Mounting the LIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Mounting from the Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Mounting from the Back . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SECTION 5—OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Optical Infrared Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Front Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
LIM Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Dip Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Slide Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Factory Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Normal Operation of Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Normal Start-Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Safe Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Alarm Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
SECTION 6—MAINTENANCE AND TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Problems During Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Display and LEDs Do Not Illuminate During Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
LIM Does Not Complete Start-Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
LIM displays “Er” (error code) 8.1 either continuously or intermittently. . . . . . . . . . . . . . . . . . . 14
Total Hazard Current “HI” After Start Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Total Hazard Current “Er” During Start Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Problems During Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Alarm Sounds During Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
LIM Alarm Sounds when Isolated Power System Is Connected to Standby
Generator Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Alarm Sounds, Total Hazard Current “Er”, and LIM Not Functioning Properly . . . . . . . . . . . 16

Bulletin No. 43134-017-02 MicroLim® Line Isolation Monitor
8/96
© 1996 Federal Pioneer All Rights Reserved
E
N
G
L
I
S
H

© 1996 Federal Pioneer All Rights Reserved Page 1
MicroLim® Line Isolation Monitor Bulletin No. 43134-017-02
Section 1—Introduction 8/96
E
N
G
L
I
S
H
SECTION 1—INTRODUCTION
What is the MicroLim® Line Isolation Monitor?
The MicroLim® Line Isolation Monitor (LIM), manufactured by Federal Pioneer, is a
testing device that continually measures the balanced and unbalanced impedance from
line-to-ground on each line of an ungrounded electrical system. The value of the
measured impedance displays on the meter of the LIM as hazard current. Hazard
current is the amount of current that would flow through a low impedance ground fault
on an ungrounded electrical system; hazard current is predicted fault current. The
higher the measured impedance from each line-to-ground, the lower the value of
hazard current.
To perform the measurement, the LIM injects a small test signal of a fixed current and
frequency, then it measures the voltage offset and phase angle offset of the test signal.
The measured and fixed values are analyzed using electrical laws to determine the line-
to-ground impedances of the system to which the LIM is connected. The LIM can
measure impedances that are either pure resistive, pure capacitive, or a combination of
both resistive and capacitive faults. Additionally, the impedances are either equally
balanced or unbalanced between each line and ground. The LIM displays a meter
reading for the line of the system with the lowest impedance to ground, or in other
words, the highest hazard current. For a thorough discussion of LIMs, hazard current,
and isolated power systems, refer to the following sources:
•Healthcare Facilities Handbook by Burton Klein, P.E., published by The National Fire
Protection Association.
•IEEE Recommended Practice for Electrical Systems in Healthcare Facilities, ANSI/IEEE Std.
602-1986, published by The Institute of Electrical and Electronic Engineers, Inc.