Psp Sak-24 User manual

Revised: 10/14/2021 Revised: 10/14/2021

SAK-24

Installation Programming Guide

SAK-24

Installation Programming Guide

Installation Instructions

1. Gen-Util LED: Illuminates solid green when

utility voltage is detected, solid red when

generator voltage is detected. Flashes red

when load is restored under generator power

modes UP & UA.

2. Load On LED: Illuminates yellow when relays

are closed.

3. LCD Display: Displays status and

adjustment values

4. Mode Button:Used to enter main menu

and toggle

5. Up Button: Adjust value up

6. Down Button: Adjust value down

7. Mounting Ears

8. Detachable wiring terminal block connector

9. 24 Volt AC Input terminals

10. Relay one dry contact terminals

11. Relay two dry contact terminals

Programming Instructions

To enter Programming Mode: Push “Mode” button (4) for three seconds and release. The present master

mode will be displayed. Pressing the mode button for one second increments will scroll through the four

available master modes as shown below. Once the desired master mode is displayed, press the mode

button for 3 seconds to select that master mode. After releasing the mode button the SAK-24 will now

be in the adjustment mode of the selected master mode. The menu mode will be exited after 7 seconds

of inactivity.

Adjust Settings In Master Modes

Adjust settings within a Master Mode: After a Master Mode has been selected the adjustments within the

Master Mode can be selected by pushing the Mode Button for 1 second increments to scroll through the

adjustments. Use the Up Button and the Down Button to adjust the values to the desired setting.

Master Modes

Master Mode LD: Load drop mode. When this mode is selected the load controlled by the SAK-24 will be

locked out when ever generator power is detected and will not be restored until stable utility power has

returned. Adjustment “D” set the delay time before load is restored after any power outage event occurs.

Master Mode UP:Load Manage Preset Under Frequency Settings. When this mode is selected the load

controlled by the SAK-24 will be connected under generator power after delay “G” when ever generator

power is detected. The load will be disconnected should an under frequency event occur. After an under

frequency event the load will be restores after delay “O”.

Master Mode UA: Load Manage Adjustable Under Frequency Settings. When this mode is selected the

load controlled by the SAK-24 will be connected under generator power after delay “G” when generator

power is detected. The load will be disconnected should an under frequency event occur. After an under

frequency event the load will be restores after delay “O”. There are three sets of under frequency adjustment

set points to customize the delay and intensity levels at which an under frequency event is detected.

Master Mode FA: Factory Adjustment Mode. When this mode is selected you have the option to adjust

global settings that can eect all modes of operation. Please consult technical support prior to making any

changes to these settings.

910 11

7 7

Theory of Operation

The SAK-24 is a low-voltage microprocessor controlled dual latching relay with built in functionality to lock

out or manage loads on generator power. The device is built around latching relays that are toggled on and

o by a short pulse of energy to open and close the contacts. The relay incorporates SRT®(Smart Relay

Technology) to control switching at the zero cross over point of the sine-wave.

Mode LD - Generator Detection & Load Lock-Out

The SAK-24 uses a proprietary Sine Wave-Distortion Index®with user adjustable sampling rates to adapt

to most utility and generator sine-waves. When Load-Drop (Mode LD) is selected from the main menu, at

power the device will turn the relay o, execute power up delay d. The SAK-24 will analyze the sine-wave

to determine if the power source is utility or generator. When utility is detected, the Gen-Util LED will turn

green, the Load On relay LED will illuminate yellow, closing the relay contacts and restoring the connected

load. When generator is detected, the Gen-Util LED will illuminate red, and the load will remain o until

stable utility power is restored. The Sine Wave Distortion Index®reading will be displayed on the LCD digital

display. After utility power returns and is detected by the SAK-24, The Gen-Utility LED will turn green, the

Load On LED illuminates yellow and the device enters sleep mode.

Mode UP & UA - Under Frequency Load Management Functions

The SAK-24 can Load-Manage using Under Frequency detection for air cooled generators. The UP mode

has preset under frequency and delay times that cannot be adjusted. These values should be suitable

for most air-cooled applications. The UA mode provides eld adjustments for frequency and delay time

to allow the installer to adjust up to three levels of under frequency detection. The option to adjust these

parameters allows the SAK-24 to adapt to the majority of load management applications.

When power is restored after a power outage, and load management Mode UP or UA are selected, the SAK-

24 opens relay one and two. The system analyzes the sine-wave to determine if the power source is utility or

generator. When a utility sine wave is detected, the Gen-Util LED turns green, the Load On LED illuminates

closing the relay contacts to restore the connected load. The SAK-24 will now enter sleep mode. When

generator sine-wave is detected, the Gen-Util LED illuminates Red indicating generator power is detected.

After the adjustable delay “g 000.0”, the load is restored and the Gen-Util LED ashes red, indicating

load management mode is active, and the yellow LED illuminates indicating the load is restored. The AC

frequency is displayed on the front panel LCD. In the event of an under frequency condition meeting the

trigger points of either Mode UP or Mode UA , the load is disconnected for the delay time set in Mode “O

000.0”. When utility power is restored, the Gen-Util LED will illuminate green and device enters sleep mode.

Please note when the SAK-24 is in sleep mode, a power outage of at least 2-3 seconds is required to restart

program. The SAK-24 will not recognize a Hot Swap transfer event so load shedding will not be activated.

Additional Modes of Operation

Scroll Compressor Saver Mode: The “Y” Mode was developed to help prevent HVAC Scroll compressors

from over heating as a result of reverse rotation after a transfer from generator voltage back to utility. When

“Y” Mode is adjusted to 000.0 the mode is inactive. Any setting greater than 000.0 will activate the mode.

When “Y” mode is active the load connected will be turned o in approximately 45 seconds after a transfer

from Generator to utility has occurred. The connected device will then remain o for the time in minutes set

in the “Y” mode adjustment.

Factory Test Mode: The factory test mode is programmed to test the push buttons, LEDs and accuracy

of the AC frequency reading during quality control testing. This feature can also be used in the eld as a

real time AC Line frequency meter. To enter test mode adjust the value of to 0001. To exit mode remove and

restore power.

PRESET VALUES

000.2

Delay at Power Up

000.2

Delay at Power Up

000.2

Delay at Power Up

e 0020

Gen Detect Set-Point

0 005.0

Restore Delay on Overload

0 005.0

Restore Delay on Overload

c 0020

Algorithm Adjustment 2

2 02.0

Preset Not Adjustable

f3 54.0

F3 Under Freq. Setting

f1 58.0

Preset Not Adjustable

1 03.0

F1 Under Freq. Delay

Time

u 0 150

“P” Load Restore Delay

3 00.5

Preset Not Adjustable

y 000.0

Scroll Comp. Saver

g 005.0

Restore Delay on Gen

g 005.0

Restore Delay on Gen

s 020

Algorithm Adjustment 1

f2 56.0

Preset Not Adjustable

2 02.0

F2 Under Freq. Delay

Time

0001

Factory Test Mode

f1 57.5

F1 Under Freq. Setting

p 001.5

O/L On Restore Detect

f3 53.0

Preset Not Adjustable

3 00.5

F3 Under Freq. Delay Time

1 03.0

Preset Not Adjustable

f2 55.0

F2 Under Freq. Setting

h 002

Consecutive B4 Sleep

Mode Menu

Press Mode button 3 sec.

to enter MASTER menu

Press Mode button 1

sec. to adjust settings

Press Mode button 1

sec. to adjust settings

Press Mode button 1

sec. to adjust settings

Press Mode button 1

sec. to adjust settings

Load Drop

Under Frequency

Preset Values

Under Frequency

Adjustable Values

Factory

Adjustments

B 0000

B 0001

C 0001

B 0001

C 0000

Adjust relay program start

up delay at Power-Up from

000.1 to 999.9 minutes to

allow power to stabilize

Adjust relay program start

up delay at Power-Up from

000.1 to 999.9 minutes to

allow power to stabilize

Adjust relay program start

up delay at Power-Up from

000.1 to 999.9 minutes to

allow power to stabilize

Adjust the Sine Wave Distortion Index™

to set generator detect threshold.

Default setting: 0020

Consult technical support

Adjust the delay time in

minutes before restoring

load after under frequency

load drop event

Adjust the delay time in

minutes before restoring

load after under frequency

load drop event

Service Adjustment. Default 020

Consult technical support

Set delay time from

00.01 to 10.00 seconds

for F2 Under Frequency

Load Shed

Under Frequency F3 set

from 50.00 to 60.00 Hz.

follows delay d3

Under Frequency F1

preset from 58.0 Hz.

follows delay d1

Set delay time from

00.01 to 10.00 seconds

for F1 Under Frequency

Load Shed

Upon load restoration, if under

frequency event occurs within “P”

seconds after restoration, this extended

delay “U” is activated and added to

setting “O” normal restore delay

Set delay time from

00.01 to 10.00 seconds

for F3 Under Frequency

Load Shed

Scroll Compressor Mode

Y0000 Mode OFF

Y0001 - 0030 load o for xx

min after detect utility

return

Adjust the delay time in

minutes before restoring

load after generator sine

wave has been detected

Adjust the delay time in

minutes before restoring

load after generator sine

wave has been detected

Service Adjustment. Default 020

Consult technical support

Under Frequency F2

preset to 56.0 Hz.

follows delay d2

Set delay time from

00.01 to 10.00 seconds

for F2 Under Frequency

Load Shed

Factory Test Mode

0000 = OFF 0001 = ON

UP = Relay On Down = Relay O

Real Time AC Freq. Meter

Under Frequency F1 set

from 50.00 to 60.00 Hz.

follows delay d1

Set delay time from 0001 to 0010

seconds for detection of Over-Load

when load is restored. An extended

delay will be executed as set up in “U”

Under Frequency F3

preset to 53.0 Hz.

follows delay d3

Set delay time from

00.01 to 10.00 seconds

for F3 Under Frequency

Load Shed

Set delay time from

00.01 to 10.00 seconds

for F1 Under Frequency

Load Shed

Under Frequency F2 set

from 50.00 to 60.00 Hz.

follows delay d2

Repetitive cycles required to conrm

Utility/Generator waveform default set

to 3 cycles

Push MODE button for

3 seconds to return

to MASTER MENU or

wait 7 seconds to save

adjustments and exit menu

To Enter Master Menu

Press and hold mode button for three seconds and release. Press mode button for 1 second intervals to scroll to desired mode, then press mode button again for three

seconds to store selected mode.

To Adjust Settings Within a Mode

After selecting the desired Master Menu, Press mode button for one second to scroll to desired adjustment, then press up and down keys to desired settings. Repeat for