12
Instruction Leaflet
IL29C614F
Effective December 2011
Instructions for The Digitrip RMS 310 3-Pole and
4-Pole Trip Unit Installation and Operation with
K-Frame Series C Circuit Breakers
EATON CORPORATION
www.eaton.com
One to four time and pick-up adjustment settings are
available depending on the particular trip unit pur-
chased. A rotary switch is provided for each setting. The
rotary switch is adjusted using a small flatblade screw-
driver (Figure
14
).
5.2 SHORT DELAY PICK-UP SETTING
Seven settings are available that range from 2 to 8 (I
n
)
as shown in Figure
12-1
. This feature is included on all
Digitrip RMS 310 Trip Units.
5.3 SHORT DELAY TIME SETTINGS
For catalog number KESxxxxLS, -LSG, -LSP and -LSE,
the short time delay is an I
2
t ramp configuration with the
actual time delay a function of the trip current involved.
For catalog numbers KESxxxxLSI, -LSIG, and LSIE, the
short time delay is a flat response. Four settings (I, .1,
.2, .3 second) are available (see Figure
12-2
). The “I”
setting gives a trip response with no intentional delay
(Instantaneous).
5.4 INSTANTANEOUS PICKUP SETTING
For catalog numbers KESxxxxLSI, -LSIG, and LSIE,
Instantaneous Pick-up is achieved by setting Short
Delay Time to “I” (Instantaneous). Short Delay Pickup
(see paragraph 5.2) then becomes Instantaneous
Pickup.
5.5 GROUND FAULT PICK-UP SETTING
Five settings ranging from 1 through 5 (xl
G
) are avail-
able (see Figure
12-3
)and correspond to the fixed
ampere values listed on the trip unit nameplate and in
Table
1-2
.
These ampere values are always the same no matter
what rating plug is installed in the circuit breaker.
Available on Catalog Nos. KES3xxxLSG and LSIG.
5.6 GROUND FAULT TIME SETTINGS
The ground fault time delay is a flat response with four
settings (I, .15, .3, .5 second) available (Figure
12-3
).
The I setting gives a trip response with no intentional
delay (Instantaneous). This option is available on
Catalog Nos. KES3xxxLSG and -LSIG.
6.0 TESTING
6.1 FUNCTIONAL FIELD TESTING
A test receptacle is built into each trip unit to allow use
of the STK2 Test Kit. The Test Kit performs a test of the
Long Delay, Short Delay and Ground Fault functions.
6.2 PERFORMANCE TESTING FOR GROUND
FAULT TRIP UNITS
6.2.1 CODE REQUIREMENTS
The National Electrical Code under Article 230-95-C
requires that any ground-fault protection system be per-
formance tested when first installed. The test shall be
conducted in accordance with approved instructions
provided with the equipment. A written record of this test
shall be made and shall be available to the authority
having inspection jurisdiction.
6.2.2 STANDARDS REQUIREMENTS
As a follow-up to the basic performance requirements
stipulated by the N.E.C. as stated above, UL Standard
No. 1053 requires that certain minimum instructions
must accompany each ground fault protection system.
These following statements plus a copy of the test
record form illustrated in Figure
17
are shipped with
each Digitrip RMS 310 Trip Unit.
6.2.3 GENERAL TEST INSTRUCTIONS
The interconnected system shall be evaluated in accor-
dance with the equipment assembler’s detailed instruc-
tions by qualified personnel.
Figure 14 Adjustment Switches and Test Points.
NOTICE
