I.L. 32-693 A
Page 6
Effective September 1998
3.
Set the Test Kit as follows:
3A.
TIMER switch to “OFF”.
3B.
CURRENT ADJUSTMENT to “ZERO”.
3C. Set
HI-LO AMPS switch to “HI AMPS”.
4.
Push
RESET button.
5.
Toggle
CALIB switch in “CALIB” position and using the
CURRENT ADJUSTMENT knob, set current to about 3/4
of pickup setting. (Do not hold in the “CALIB” position
for more than 15 –20 seconds)
6.
Push
TEST button and increase current steadily, using
CURRENT ADJUSTMENT knob, until the breaker trips
and red Test lamp goes out.
7.
Prior to returning
CURRENT ADJUSTMENT to “ZERO”,
hold
CALIB switch in “CALIB” position momentarily to
read the trip current.
4.7 CHECKING SHORT DELAY PICKUP (S.D.P.U.) (IF
APPLICABLE)
1.
Set Trip Unit Short Delay Time to minimum (.1 sec.)
and Instantaneous to off.
2.
Set desired Short Delay Pickup on the Trip Unit. Note
that the Short Delay Pickup (I
r
) is the product of the
Long Delay Setting times the Short Delay Pickup
Setting.
3.
Set the Test Kit as follows:
3A.
SHORT DELAY switch in “OPERATIVE” position.
3B.
CURRENT ADJUSTMENT to “ZERO”.
3C.
TIMER to “OFF”.
3D. Set
HI-LO AMPS switch to “LO AMPS” if Short Delay
Pickup is less than 8 amperes or to “H I AMPS” if it is
greater than 8 amperes.
4.
Push
RESET button.
5.
Toggle
CALIB switch in “CALIB” position and using the
CURRENT ADJUSTMENT knob, set current to about 3/4
of pickup setting. (Do not hold in the “CALIB” position
for more than 15 –20 seconds)
6.
Push
TEST button and increase current steadily, using
CURRENT ADJUSTMENT knob, until the breaker trips
and red
TEST lamp goes out.
7.
Prior to returning
CURRENT ADJUSTMENT to “ZERO”,
hold
CALIB switch in “CALIB” position momentarily to
read the trip current.
4.5 CHECKING LONG DELAY TIME (L.D.T.)
(S
EE
SECTION
2.2.2
REGARDING
THE
T
RIP
U
NIT
’
S
THERMAL
MEMORY
CIRCUIT
)
1.
Set the Test Kit as follows:
1A.
TIMER switch to “OFF”.
1B.
HI-LO AMPS switch to “HI AMPS”.
1C.
CIRCUIT SELECTOR switch to “A”.
1D.
CURRENT ADJUSTMENT to “ZERO”.
2.
If equipped, set Short Delay and Instantaneous
Pickups on Trip Unit to maximum (or off) to prevent
trip of the breaker by these functions.
3.
Set desired Long Delay Pickup and Long Delay Time
on Trip Unit.
4.
Toggle
CALIB switch to “CALIB” position and increase
current on tester, using
CURRENT ADJUSTMENT, to 6 X
LDPU current setting. (Do not hold in the “CALIB”
position for more than 15 –20 seconds)
5.
Push
RESET button.
6.
Turn
TIMER “ON”. If TIMER does not read zero, push
manual
RESET button on TIMER.
7.
Push
TEST button. TIMER will stop when Trip Unit trips
the breaker. Timer should read less than the dial
setting but not under 2/3 of the setting; e.g., if set at
24, it should be more than 16 seconds but less than 24
seconds. NOTE: I
2
t = CONSTANT, therefore, trip time
at a current other than 6 (I
n
) is calculated as follows:
(6 / z)
2
X (Long Delay Time) =Trip Time at z current,
where z = multiples of LDPU at which test current is
applied. Example: Long Delay Time Setting = 24
seconds. Then for 3 times LDPU current setting
applied, the Long Delay Trip Time would be as fol-
lows:
(6 / 3)
2
X (24 seconds) = 96 second Long Delay Time
at 3 LDPU. Remember to use 5 amperes times LDPU
setting to set the tester current.
4.6 CHECKING INSTANTANEOUS (IF APPLICABLE)
1.
Set Long Delay Pickup and Time to maximum and set
Short Delay Pickup to M1 setting, so that these func-
tions do not trip the breaker.
2.
Set desired Inst. pickup on the Trip Unit. Note: Pickup
setting should not exceed the capability of the Test Kit
(approx. 50 amperes).
