Masterpact ® circuit breaker
control u nits
load monitoring
mini test kit
portable test kit
load monitoring (option R)
The option R provides two independent
static contacts which operate when the
current exceeds adjustable pickup limits.
•
when the current exceeds the limit lc1
(or lc2) the contact C-R1 (or C-R2) closes,
following an inverse time characteristic
a.
•
when the current drops below the limit
lc1 (or lc2) the contact C-R1 (or C-R2)
opens with constant time delay (1 0
seconds)
b.
These contacts can be used for load
shedding, alarms, indications, etc.
voltage
240 Vac max.
outputs
0 . 1 A triac
test kits
Every control trip unit is equipped with a test
receptacle that can be used with a test kit.
Tests performed by test kits are only
functional tests designed to electrically test
the operating integrity of the control unit, the
flux transfer device and the mechanical
operation of the circuit breaker. Tests are
not designed to calibrate the circuit breaker.
Calibration can best be done at the factory.
mini test kit test procedure
Overcurrent protection test procedure
1
operate on "OFF load" conditions.
2
record the short-time or instantaneous
pickup setting and set the control unit to the
minimum setting.
3
close the circuit breaker.
4
connect the two
+
and - test leads into
trip unit test receptacle, observing the
"+ -
overcurr" markings.
5
press the test kit push button, the circuit
breaker will trip.
6
return to initial setting.
Batteries
The mini test kit requires five 9-volt batteries.
Alkaline batteries are recommended.
Dimensions:
5-1/2 x 3 x 1 -1 /2 in. ( 1 40 x 76
x 38 mm)
portable test kit test procedure
A
DANGER
HAZARD OF ELECTRICAL SHOCK, BURN
OR EXPLOSION.
Do not touch test plug pins when power cord
is plugged in and power switch is ON. The
power switch should never be in the ON
position unless test plug is connected.
Failure to do so will cause death,
personal injury or electrical shock.
1 2
tim
e
MP1 008A.O
current
MP1 032P.O
•
prior to testing:
1
operate in "OFF load" conditions.
2
set control voltage selector located at the
back of test kit to proper voltage.
3
switch for control power must be
OFF.
4
connect test leads according to
"+ -
overcurrent" marking.
5
plug in the power cord.
6
turn control power switch ON.
The "power on" lamp should light. If not,
check the source, then the test kit fuse
( 1 A fuse).
7
close circuit breaker.
•
long time:
connect test leads according to
"+
overcurrent" indications (on control unit).
set current selector K of test kit at control
unit long-time setting.
push lr switch. The circuit breaker will trip
(see max. tripping time in table below).
MP1 033P.O
.A,
CAUTION
Hazard of Equipment Damage
When circuit breaker trips, release the test
switch immediately. Under no circumstances
should this switch be in the ON position for
more than
1 20%
of the expected maximum
tripping time.
Failure to follow this precaution can
result in equipment damage.
•
short time or instantaneous:
Connect test leads according to the control
unit
"+ -
overcurrent" indications.
push lm switch for one second max. to
trip circuit breaker.
•
ground fault
(residual scheme):
.A,
CAUTION
Hazard of Equipment Damage
Connect test leads according to the control unit
"+
- ground" indications.
Failure to follow this precaution can
result in equipment damage.
Push lh switch for one second max. to trip
circuit breaker.
STR 280
-
STR 388
NA
75
sec.
STR 58U
1 5
sec.
8
sec.
30
sec.
18
sec.
60
sec.
35
sec.
1 20
sec.
70
sec.
240
sec.
1 80
sec.
480
sec.
300
sec.
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. ElectricalPartManuals
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