3
CAUTION
To ensure accurate current monitoring the lines
should be strapped to the top of C.T. loop with
tie wrap provided. Stagger each C.T. to allow
maximum separation (minimum interaction).
4. Wire the selected control voltage to the appropriate 1/4” male
spade terminals marked:
a. 24V AC
b. Common and 120V AC
c. Common and 208/240V AC
5. Wire the safety control circuit of the contactor/starter through
isolated contacts N.O. and COM (4 amps max.).
NOTE: the N.O. contacts will close when power is applied
to the 610-12A.
6. Connect a separate DVM and install a separate DAM as fol-
lows: (See Figure 2)
a. Using DVM connect: Trip Volts (+) and Trip Volts-(–) test
posts, set scale to 20V DC.
b. Install DAM on: Line 1, set scale to anticipated current
value.
CAUTION
Do NOT adjust TRIP ADJ. (Amps) potentiom-
eter (15 turn); control is factory set to trip at 20
amps. Complete Fail-Safe Checkout first.
Fail-Safe Checkout
1. Apply line and control voltage to control panel to
start motor. Control circuit (N.O./COM) will close.
2. Motor should start, and control trip; stop motor momentarily.
a. Current observed should exceed 20 amps
b. Trip Volts observed should exceed 0 .25V DC.
3. When current exceeds values above:
a. Trip will occur. (Trip will vary from 2 seconds to 1 minute
(±) depending on the magnitude of current observed above
20 amps.)
b. Control circuit (N.O./COM) will open,
c. Load through contactor/starter will disconnect.
4. Installer may re-verify operation as observed in Item 2 above,
by resetting red RESET button.
5. Should “trip” fail to occur; check:
a. All wiring connections. (Items 3, 4, 5)
b. All voltage/amp reading. (Items 6a, 6b)
Standard Calibration
Procedure
This procedure provides an installer with the ability to deter-
mine the Trip (protection) Level required for the application. Trip
Level is described as a % of FLA as seen by the motor or Trip Volts
as seen by the 610-012A.
A range of motor protection from 5% to 15% above FLA is
typical. When 8% above FLA is selected (recommended), this
value will also provide protection for:
Low Voltage @ –10% (brown-out)
and
High Voltage @ +15% (over-voltage)
1. Disconnect power and control voltage to unit/motor.
2. Obtain the motor nameplate FLA. ________ Amps
If you have a part winding (6 lead) motor, divide the FLA rat-
ing by two (2). See App Note 173-0207-001 for wiring details.
3. Install jumper (shorting clip) across N.O./COM.
4. Connect DVM to:
a. TRIP VOLTS test post (+)
b. TRIP VOLTS test post (–)
c. Select appropriate DC Volts scale.
5. Apply power and control voltage to unit/motor. MOTOR
WILL START
6. Locate motor nameplate FLA in Table-1, Page-4, Column-1
and;
a. Select TRIP VOLTS, DC value in Table 1 (Column-2, 3,
or 4) for % overload required. (108% Recommended)
b. Adjust TRIP ADJ. (Amps) potentiometer (15 turn) CW
until TRIP VOLTS, DC value selected is obtained on
DVM.
7. Disconnect power and control voltage
8. Remove jumper (shorting clip) from N.O./COM.
9. Apply power and control voltage to unit/motor.
10. Fail-safe through N.O./COM is now under control.
11. Disconnect DVM and DAM. STANDARD CALIBRATION
PROCEDURE is complete.
Below 20 Amp FLA Use
The 610-012A Motor Protector may be applied where FLA
ratings do not normally exceed 20 amps. Wiring passed through
C.T.s may be “looped”, effectively providing a FLA multiplier, i.e.,
10 amp FLA rated motor leads passed through the C.T.s three (3)
times (first pass plus 2 loops) would be treated as approximately 30
amps FLA. Ensure all C.T. loops are formed equally, neatly and in
the same direction, perpendicular (at 90°) to the C.T. strap axis. See
