Cutler-Hammer
I.L. 29-8858
Instructions for Digitrip
RMS 510
Trip Unit
Table of Contents
Page
1 .0
General Description . . . . . . . . . . . . . . . . . . . . . 1
1 .1
Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1 .2
Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1 .3
Testing . . . . . .
.
. . . . . . . . . . . . .
.
. . . . . . . . . . . 4
2.0
UL Listed Devices . . . . . . . . . . . . . . . . . . . .
.
. . 4
3.0
Principle of Operation . . . . . . . . . . . . . . . . . .
.
. 4
3.1
General . . . . . . . . . . . . . . . . . .
.
. . . . . . . . . .
.
. 4
3.2
Trip and Operation Indicators . . . . . . . . . . . . . . 5
3.3
Test Provisions . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.4
DIScriminator (Making Current Release) . . . . . 5
3.5
OVERRIDE (Fixed Instantaneous) . . . . . . . . . . 6
3.6
Zone I nterlocking . . . .
.
. .
.
. . . . . . . . . . . . . . . . 6
4.0
Protection Settings . . . . . . . . . . . . . . . . . . . . . . 6
4.1
General . .
.
. . . .
.
. . . . . . . . . . . . . . . . . . . . . . . 6
4.2
Long Delay Current Settings . . . . . . . . . .
.
. . . . 7
4.3
Long Delay Time Settings . . . . . . . . . . . . . . . . . 7
4.4
Short Delay Current Settings . . .
.
. . . . . . . . . . 8
4.5
Short Delay Time Settings . . . . . . . . . . . . . . .
.
8
4.6
Instantaneous Current Settings . . . . . . . . . . . . . 8
4.7
NO Instantaneous Current Settings . . . . . . . . . 8
4.8
Ground Fault Current Settings . . . . . . . . . . . . . 8
4.9
Ground Fault Time Delay Settings . . . . . . . . . . 9
5.0
Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . 1 0
5.1
General . . . . . . . . .
.
. . .
.
. . . . . . . . . .
.
. . . . . 1 0
5.2
When To Test . . . . . . . . . . . . . . . . . . . . . .
.
. . 1 1
5.3
Test Provision . . . . . . . .
.
. . . . . . . . . . . . . . . . 1 1
5.4
Conducting Tests . . . . . . . . . . . . . . . . . . . . .
.
. 1 1
5.4. 1
Control Power . . . . . . . . . . . . .
.
. . . . . . . . . . . 1 1
5.4.2 Not Tripping the Breaker . . . . . . . . . . . . . .
.
. . 1 2
5.4.3 Tripping the Breaker . . . . . . . . . . . . . . . . . . . . 1 2
6.0
Battery (Inside the Rating Plug) . . . . .
.
. .
.
. . 1 2
6.1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2
6.2
Battery Check .
.
. . . . . . . . . . . . . . . . . . . . . . . 1 2
6.3
Battery Replacement . . . . . . . . . . . . . . . . . . . 1 2
7.0
Auxiliary Power Module . . . .
.
. . . . . . . .
.
. . . . 1 4
8.0
Frame Ratings, (where applicable,
Sensor Ratings) and Rating Plugs . . . . . . . . 1 4
9.0
References . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5
9.1
Digitrip RMS Trip Assemblies . . . . . . . . . . . . . 1 5
9.2
Type DS Low Voltage AC Power Circuit
Breakers
.
. . . . . . .
.
. . .
.
. . . . . . . . . . . . . . . 1 5
9.3
Type SPB Systems Pow-R Breakers . . . . . . . . 1 5
9.4
Series C%
®
R-Frame Molded Case Circuit
Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5
Appendix A Zone Interlocking - Example . . . . . . . . . . . 1 5
Effective May 1 997, Supersedes
I.L.
29·BB5A dated September 1 994
A
WARNING
DO NOT ATTEMPT TO INSTALL OR PERFORM MAIN
TENANCE ON EQUIPMENT WHILE IT IS ENERGIZED.
DEATH OR SEVERE PERSONAL INJURY CAN
RESULT FROM CONTACT WITH ENERGIZED EQUIP
MENT. ALWAYS VERIFY THAT N O VOLTAGE IS
PRESENT BEFORE PROCEEDING WITH THE TASK,
AND ALWAYS FOLLOW GENERALLY ACCEPTED
SAFETY PROCEDURES. CUTLER-HAMMER IS NOT
LIABLE FOR THE MISAPPLICATION OR MISINSTAL
LATION OF ITS PRODUCTS.
It is strongly urged that the user observe all recommen
dations, warnings and cautions relating to the safety of
personnel and equipment, as well as general and local
health and safety laws, codes, and procedures.
The recommendations and information contained herein
are based on experience and judgment, but should not
be considered to be all-inclusive or covering every appli
cation or circumstance which may arise. If you have any
questions or need further information or instructions,
please contact your local representative, or the Customer
Support Center for the type of circuit breaker you have:
Circuit
Call
Send to
Breaker
Telephone
FAX
Type
N umber
Number
DS/DSL
( 41 2) 937-6029
(41 2) 937-6396
SPB
(412) 937-6029
(412) 937-6396
Series
c®
R-Frame
(41 2) 937-6490
(41 2) 937-601 0
1 .0 GENERAL DESCRIPTION
1 .1 Protection
The Digitrip RMS 51 0, illustrated in Fig. 1 , is a custom
application specific integrated circuit based trip unit suit
able for use in types DS and DSL low voltage AC power
circuit breakers and type SPB Systems Pow-R circuit
breakers and Series
c®
R-Frame molded case circuit
breakers.
The Digitrip RMS 51 0 provides true RMS current sensing
for proper correlation with thermal characteristics of con
ductors and equipment. Interchangeable rating plugs are
provided to establish the continuous current rating of
each circuit breaker.
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