Eaton Cutler-Hammer Digitrip RMS 510 Trip Unit, Инструкция по эксплуатации, Страница: 2 / 20

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The Digitrip RMS 51 0 Trip Unit is completely
self-con­
tained and when the circuit breaker is closed,
requires
no
external control power to operate its protection sys­
tems.
It operates from current signal levels
and control
power derived through current sensors
integrally
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) adjustments to
meet specific application requirements. The
types of pro­
tection available for
each
model include the
following,
which are illustrated in Figures 2.1 through 2.6:
Protection Types Refer to
Figure
Long Time/Instantaneous Ll* 2.1
Long Time/Short Time LS* 2.2
Long Time/Short Time/Instantaneous LSI* 2.3
Long Time/Instantaneous/Ground LIG 2.4
Long Time/Short Time/Ground LSG 2.5
Long Time/Short Time/Instantaneous/ LSIG 2.6
Ground
I.L. 29-8858
Note*: RMS Digitrip Type Ll, 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 breaker
is wired and MARKED for NEUTRAL PROTECTION.
Refer to the N ational Electric Code for appropriate
application of 4-pole breakers.
1.2 Information
Light Emitting Diodes (LED's) on the face of the trip unit
light "Red" to indicate the
reason for an automatic trip
operation. The battery
in the rating plug maintains the
reason for trip indication following an automatic trip oper­
ation, until the "TRIP RESET" button is pushed.
T he "Green" LED in the lower right corner "blinks" to indi­
cate the trip unit is operating normally. The battery in the
rating
plug is "OK" if
the
LED lights "Green" when the
"battery check" button next to it is pushed. (See
Section 6.).
Note: The Digitrip RMS
510
provides all of its protec­
tion functions regardless of the status of the battery.
The battery serves only to maintain the indication of
the reason for automatic trip.
Fig.
1
LED's
light
"'RED" to indicate
cause of trip
Tome-Current Curve
for Ground
Protection
Trip
Unit
Operational
Status
"Blinking
Green"=OK
Adjust Protection Settings for
Desired
Values with Rotary Swttches
Digitrip RMS
510
Trip Unit Model LSIG with Rating Plug
Effective May 1997
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