Specifications

I.B. ATS-I005
Page 31
Effective 6/00
pushbutton labeled “Manual Transfer to Normal.”
If YES: STOP! The transfer switch must be
MANUALLY transferred to NORMAL
by depressing the pushbutton.
If NO: Proceed to Step 2.
Step 2: Is Option 9B installed? If so, there would be
a selector switch labeled “Maintenance.”
If YES: Verify selector switch is in the
“Operate” position.
If NO: Proceed to Step 3.
Step 3: Are the correct line voltage and frequency
available at terminals N1, N2 and N3?
Record the readings.
If YES: Proceed to Step 4.
If NO: Check NORMAL source
Step 4: Is the voltage selector plug in the correct
position?
If YES: Proceed to Step 5.
If NO: Position plug correctly.
Step 5: Measure the voltage on transformer N1
between terminals X1 and X2. Is the voltage
measured 120 Vac (+/- 10 volts)? Record the
reading.
If YES: Proceed to Step 6.
If NO: Check NT1.
Step 6: Is the NORMAL switching device charged?
If YES: Proceed to Step 7.
If NO: Go through paragraph 6.3.4 first
before continuing.
Step 7: Is the NORMAL power source available?
If YES: Proceed to Step 8.
If NO: Apply the correct system voltage to
NORMAL connections.
Step 8: Is the EMERGENCY switch OPEN?
If YES: Proceed to Step 10.
If NO: Proceed to Step 9.
Step 9: Measure the voltage between terminals A9
and A8 on the EMERGENCY switching
device (shunt trip). Is the voltage measured
120 Vac (+/- 10 volts)? Record the reading.
If YES: Refer to the SPB maintenance manu-
al and check the shunt trip
EMERGENCY switch.
If NO: Check the wiring to A9 and A8.
Step 10: Measure the voltage between terminals A1
and A2 on the NORMAL switching device
(spring release coil). Is the voltage measured
120 Vac (+/- 10 volts)? Record the reading.
If YES: Refer to the SPB maintenance manu-
al and check the spring release coil
NORMAL switching device.
If NO: Check the wiring to A1 and A2.
Step 11: If a problem persists, contact Cutler-Hammer.
6.4.3 TRANSFER SWITCH WILL NOT
AUTOMATICALLY TRANSFER TO EMERGENCY
Step 1: If the alternate source is a generator, is it run-
ning?
If YES: Proceed to Step 2.
If NO: Check the generator. Check the
engine start contacts.
Step 2: Are the correct line voltage and frequency
available at terminals E1, E2 and E3?
Record the readings.
If YES: Proceed to Step 3.
If NO: Verify that there is output voltage
from the generator.
Step 3: Is the voltage selector plug in the correct
position?
If YES: Proceed to Step 4.
If NO: Position plug correctly.
Step 4: Is the NORMAL source available?
If YES: Proceed to Step 5.