Carrier 23XL Especificações descarregar pdf (Página 51)

CUTLER-HAMMERt SOLID-STATE STARTERS

This equipment is at line voltage when ac power is con-

nected. Pressing the STOP button does not remove volt-

age. Use caution when adjusting the potentiometers on

the equipment.

1. Check that all wiring connections are properly termi-

nated to the starter.

2. Verify that the ground wire to the starter is installed prop-

erly and is of sufficient size.

3. Verify that the motor is properly grounded to the starter.

4. Check that all of the relays are properly seated in their

sockets.

5. Verify that the proper ac input voltage is brought into the

starter. Refer to the certiﬁed drawings.

The order in which the solid-state control module adjust-

ment potentiometers are set is important because of the in-

terdependency of these functions. See Table 7 and Fig. 38.

The settings should be made in the following sequence:

Potentiometer Adjustment

NOTE: All potentiometers are factory set. The following in-

formation is provided for reference.

Adjustment potentiometers are nearly linear. To make an

initial setting, determine the percentage of the potentiometer

rotation. Use the following formula to calculate the percent

of rotation. See Fig. 38 and 39.

(desired setting) −(minimum setting)

(maximum setting) −(minimum setting)

% of rotation =

Example: Starting current is adjustable between 100% and

400% of motor full load current. The initial setting for 200%

starting current is as follows:

(200%) − (100%) =

⁄

of full rotation (33%)

(400%) −(100%)

% of rotation =

Do not adjust any potentiometer beyond its stops.

This type of adjustment will result in damage to the

potentiometer.

LEGEND

1—Phase Voltage Indicator 3—Starting Torque Potentiometer

2—Starter Fault and Run LEDs (5) 4—Ramp Up Potentiometer

• Overtemp 5—Phase Correct LED

• Ground Fault 6—Relay On LED

• Current Unbalance (CUB)

While Stopped

7—Power +15 and Auxiliary (Starter

in RUN State) LEDs (Hidden)

• Current Unbalance 8—SCR Indicator LEDs (Hidden)

• Run (Start Initiated) 9—Reset Button

Fig. 36 — Typical Benshaw, Inc. Solid-State Starter

Power Stack

NOTE: Adjustments:

Starting torque — 0% to 100% rated motor torque.

Ramp time to full motor voltage — 0.5 seconds to

60 seconds.

Fig. 37 — Ramp Up and Starting Torque

Potentiometers

Fig. 38 — Typical Cutler-Hammer Solid-State

Starters

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 103 104

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