Flowserve KW941 User Manual download pdf (Page 14)

KW941 Pump Power Monitor USER INSTRUCTIONS ENGLISH 71569285 02-12

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5.2.2 To display MOTOR POWER

1) Obtain the Full Scale power (HP or KW) from

Table #4. This will be the Full Scale Adjust

setting (FSA).

Example: Full Scale power = 3.8 HP.

FSA = 3.8 HP

FSA = 2.8 KW

2) Depress the Full Scale Adjust button. The LED

on the button will illuminate, indicating that the

Full Scale Adjust function is active.

3) Press the ↕ SET arrows to obtain the Full Scale

Adjust setting on the display.

4) Press the HP or KW display mode button to

return to normal operation or any other function

button to activate that function's adjustment

feature.

The display will now indicate power to the motor in

the selected units.

Unbalanced power line load conditions will

affect power readings.

5.3 Alarms

The KW941 provides LOW POWER (UNDERLOAD)

and HIGH POWER (OVERLOAD) alarm relays.

When wired into the pump's motor starter circuit, the

alarm relays can trip out the pump motor during

UNDERLOAD or OVERLOAD conditions. The alarms

are disabled for an adjustable period of time during

motor start-up (Start-Up Delay) to permit the pump to

reach normal operation.

The following information describes how to set up the

Start-Up Delay timer and alarms.

5.3.1 Start-Up Delay

The start-up delay is the amount of time in seconds

(0-999) that must expire after the pump motor has

been started and before the High Power and Low

Power functions become active.

5.3.1.1 Operation

When the pump is started, the START-UP DELAY

LED will flash for the set period of time and then go

out.

5.3.1.2 Setting the START UP DELAY

1) Press the START-UP DELAY button. The Start-

Up Delay LED will illuminate and the display will

show the timer value in seconds.

2) Adjust the value by pressing the ↕ SET arrow

buttons to obtain the desired time (0-999

seconds) on the display. It is recommended that

the delay be set to the minimum time required to

obtain a normal pump start-up (usually less than

5 seconds). Excessive delays leave the pump

un-protected which may result in damage to the

pump or motor.

3) Press the desired display mode HP or KW

button to turn off the Start-Up Delay LED and

return to normal operation (or any other function

button to activate that function's adjustment

feature).

5.3.2 Low Power Alarm

The Low Power Trip Point is the minimum power

level necessary to prevent the Low Power Alarm

relay from tripping. The normal state of the Low

Power Trip Point LED is off.

5.3.2.1 Operation

If a low power trip has occurred, the Low Power Trip

Point LED will blink and the Low Power Alarm Relay

will trip if the Low Power Trip Delay timer has

expired.

The Low Power Trip Delay is the amount of time in

seconds (0-999) that must expire before the Low

Power Alarm Relay will trip. The timer is activated

when the power level has fallen below the Low Power

Trip Point setting. The normal state of the Low

Power Trip Delay LED is off.

When the power level has fallen below the Low

Power Trip Point setting, the Low Power Trip Delay

LED will blink. If the power level increases above the

trip point setting before the delay timer value times

out, the blinking LED will then go out and the unit

returns to normal operation. If the power level

remains below the trip point longer than the delay

timer setting, the Low Power Trip Relay is activated.

The blinking Trip Delay LED will go out and the Trip

Point LED will blink alerting the operator to the

problem.

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Flowserve KW941 User Manual Page 14

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