Cutler-Hammer Digitrip RMS 510, Инструкция по эксплуатации

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\
\
\
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Gnd Fault
0
....-...
I
I
I
I
1
:
Available Setting s
.1 . .
2
. . 3,
.4,
.5
-
- -
Secon d
s
w
i
t
h
I
1
l
___
I
Flat Response
I \...
_ _
_
:_- -_ _I
I
1
2
t Shape
1
/
Returns to Flat
I
R
e
s
p
on
s e a t
Approximately
I
!
'
_ _ _
I
:
........ ...... I
.1*, .3*, .5*
I
'
,f
-.. '
Seconds with
0.625 1n
"•"In Viewing Window
' '
' " I
12t Shape
Indicates
'
...... .._ -
12t Shape
'
- - -
Fig. 4. 7 Ground Fault Time Delay Settings
Note: See also Section 3.6 on Zone Interlocking.
5.0 TEST PROCEDURES
5.1 General
A
DANGER
DO N OT ATTEMPT TO INSTALL, TEST OR PERFORM
MAINTENANCE ON EQUIPMENT WHILE IT IS ENER­
GIZED. DEATH OR SEVERE PERSONAL INJURY CAN
R ES U LT FROM CONTACT WITH ENERGIZED EQUIP­
M ENT.
DE-ENERGIZE THE CIRCUIT AND DISCONNECT THE
CIRCUIT B REAKER BEFORE PERFORMING MAINTE­
NANCE OR TESTS.
As illustrated in Figs. 1 and 5, an integral test panel is
provided to test the Digitrip RMS 51 0 Trip Unit.
Several no-trip settings are provided to check the trip unit
operation without actually tripping the circuit breaker.
Breaker Trips
At 6T and GFT
Test Amps
(ill
CD
x In
z
Test ®
0
Trip @
0
Reset
Unit
0
Status
I.L. 29-8858
Available "Test Amps" Settings
CD "6T" = Phase Current Test at
6xln and
TRIPS
breaker;
"1 ,
2, 3,
B
or
1 0"
x I = Phase
Current Test
·
NO
'b
reaker
TRIP;
"GFT" = Ground Current Test
and
TRIPS
breaker;
"GF" = Ground Current Test
•
NO breaker
TRIP.
See Section
5.4.3
for inser·
vice test trip limitations.
@ Push, then release Trip R eset
button to reset Trip Unit.
Required following all
automatic trip and test
operations.
® Push, then release Test
button to test. Test operation
begins with release of
pushbutton.
Fig. 5 Integral Test Panel (Lower Right Corner of Trip
Unit)
A
CAUTION
TESTING A CIRCUIT BREAKER U NDER "TRIP CON­
DITIONS" WHILE IT IS IN S E RVICE AND CARRYING
LOAD CURRENT, WHETHER DONE BY INTERNAL
OR EXTERNAL MEANS , IS N OT RECOMMENDED.
ANY TRIPPING OPERATION WILL CAUSE DISRUP­
TION OF SERVICE AND POSSIBLE PERSONAL
INJURY RES U LTING FROM U N N ECESSARY SWITCH­
ING OF CONNECTED EQUIPMENT.
TESTING OF A CIRCUIT BREAKER THAT R ES U LTS
IN THE TRIPPING OF THE CIRCUIT BREAKER
SHOULD BE DONE ONLY WITH THE CIRCUIT
BREAKER IN THE "TEST" OR " DISCONNECTED"
CELL POSITIONS OR WHILE THE CIRCUIT
BREAKER IS ON A TEST BENCH.
To preserve the primary protection function of the trip
unit, all in-service testing under "Trip" or "No-Trip" condi­
tions are only performed at load current values no greater
than 50% of the Long Delay Current Setting,
lr-
Any
attempt to conduct in-service testing when the load cur­
rent exceeds 50% of 1,, will not be executed by the trip
unit.
Since the Digitrip RMS 51 0 Trip Unit is completely self­
powered using energy derived from the current sensors
installed in the circuit breaker, all in-service tests con­
ducted should be conducted with the auxiliary control
power module, shown in Fig. 7, plugged into the trip unit.
This action will avoid difficulties caused by load current
levels that are too low to operate the trip unit.
Effective May 1 997
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