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Masterpact ® circuit breaker
control u nits
1 mechanical pop-out type fault indicator
and reset button
•
indicates that a fault trip has occurred
•
prevents reclosure of the circuit
breaker after fault until reset
2 ammeter
(LCD digital display)
3 ammeter selector
used to read:
•
phase currents (1 , 2, 3, N, ground)
•
or the phase with the highest load
current (max.)
4 load indication
(bar graph - % of current setting)
5 sensor rating
6 local and remote pre-trip alarm:
•
LED on at 90% of current setting
•
LED flashing on overload
CD
•
remote indication by static contact
7 rating plug
8 long-time current setting
9
short-time pick-up
1 0 short-time delay
1 1 instantaneous ON/OFF selector
1 2 available space for setting
identification
1 3 ground-fault (option T) pick-up
1 4 ground-fault (option
T)
time delay
15 local (option F) fault indicators:
consisting of built-in light emitting diodes:
fault indicators differentiate the three causes
of tripping: overload, short circuit and ground
fault, if any
1 6 test receptacle
1 7 fault indicator saving battery
(option PIL)
18 fault indicator reset or battery test
button
19
fault indicator re-activating button
(option PIL)
�
current
M P 1 008A.O
CD
according to time current curves: 1 05% to 1 20% of
current setting
� with PIL option, fault indicator lights ( 1 5) will only
light up when this button is pushed in
@
see values on pp. 24 to 26
®
residual scheme. The maximum ground-fault
pickup meets 1 991 National Electrical Code
paragraph 230-95 (a) (not exceeding 1 200A)
Source Ground Return scheme on request
®
0.1 minimum pickup only with external power
® total accuracy including current sensors:
±
4.5%
0
control power not required for loads greater than
20% of current sensors. Required for loads less
than 20% of current sensors if maximum demand
memory requested. (see diagram p. 29)
long-time
short-time
STR
385
for selective application
current setting 0.8 to 1 x rating plug (pick up at 1 . 1 x setting)
delay
fixed: 7.5 s at 6 x current setting
thermal memory as standard
pickup
1 .5 to 1 0 x current setting
delay bands
0 - 0.1 - 0.2 - 0.3 - 0.4 with l2t OFF
0
.
1 - 0.2 - 0.3 with l2t ON
control power
not required
0
7
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