5
Instruction Leaflet
I. L. 29-885D
Effective August 2011
Instructions for Digitrip RMS 510 Trip Unit
EATON CORPORATION
www.eaton.com
To check the status of the battery, see Section 4 .5 .
otee:
N
The Digitrip RMS 510 performs all of its protection functions regardless
of the status of the battery . The battery serves only to maintain the indication
of the reason for automatic trip .
Press and release the "
TRIP RESET
" push-button shown in Figure 2,
to turn "Off" the LEDs following a trip operation .
1.1.2 General Over-Current Protection
The Digitrip RMS 510 Trip Unit is completely self-contained and
when the circuit breaker is closed, requires no external control
power to operate its
protection systems
. It operates from current
signal levels and control power derived through current sensors inte-
grally mounted in the circuit breaker .
The Digitrip RMS 510 Trip Unit is available in six different types .
Each Trip Unit may be equipped with a maximum of five phase and
two ground (time-current) settings (see Section 3) to meet specific
application requirements . The protection available for each type is
summarized in the following table, and illustrated in Figures 3 thru 8:
Protection Functions
Type
Figure
Long Time / Instantaneous
LI*
3
Long Time / Short Time
LS*
4
Long Time /Short Time /
lnstantaneous
LSI*
5
Long Time / Instantaneous
/ Ground
LIG
6
Long Time / Short Time /
Ground
LSG
7
Long Time / Short Time /
lnstantaneous / Ground
LSlG
8
otee:
N
*RMS Digitrip Type LI, LS and LSI Trip Units can be applied on 3-pole or
4-pole circuit breakers for protection of the neutral circuit, IF the circuit break-
er is wired and MARKED for NEUTRAL PROTECTION . Refer to the National
Electric Code for appropriate application of 4-pole breakers .
Figure 3. Digitrip RMS 510 Type Ll.
Figure 4. Digitrip RMS 510 Type LS.
