will this work for a car cooler to prevent battery drain and if so can I set the shut off at 13 volts?

Short answer is no. Min voltage is 17v so no it would not. However if you took say another 12v battery and wired it in series for 24 v but only use the other battery for emergency's you could use the 24v and set the cutoff at 22v and have the relay open in that instance it would kinda work but you would have to have a contactor for the battery connection because of the amperage of the starter.

Is there a link for the MAnual/directions for Ad48?

It comes with a little piece of paper that explains the setup. It is a some device that is configured to activate a form "C" relay based upon a low and high voltage. Example: if the low is set to 48vdc and the high to 50vdc, the relay can be wired to be closed or open between those two voltages.

Are the input and output contacts isolated? i want to bring in my battery voltage (48v dc) and if it gets low cut the 240v ac on the output contacts.

Yes the contacts are isolated from the input

Can this is connected to a 120/240 volts power supply?

Yes. It can connect to 120v. Dc or Ac

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YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220)

YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220)

Product ID: 133985529

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Details

Connector Type
Screw
Contact Material
Copper Alloy
Contact Type
Normally Open
Current Rating
6 Amps
Mounting Type
DIN Rail Mount

⚡6A max current rating

📊Built-in LCD real-time display

🔧Modular DIN rail mount

Description

⚡ Stay ahead of power faults with smart, seamless voltage monitoring!

SELF POWERED RELIABILITY - Operates without auxiliary power—always ready, always on
REAL TIME VOLTAGE INSIGHTS - Integrated LCD shows live voltage, faults & settings in Chinese
UNIVERSAL VOLTAGE DETECTION - Auto-detects AC/DC voltage—no manual switching needed
EFFORTLESS MODULAR INSTALLATION - Standardized rail-type design for quick, secure setup
ROBUST OVER UNDER VOLTAGE PROTECTION - Instantly monitors and safeguards single-phase circuits

The YWBL-WH SVR1000 is a compact, self-powered single-phase voltage monitoring relay designed for DIN rail installation. It automatically detects AC/DC voltages, provides real-time voltage and fault status via a built-in LCD, and protects circuits from over-voltage and under-voltage conditions with a 6 Amp contact rating. Ideal for professionals seeking reliable, modular power protection with intuitive monitoring.

Specifications

Connector Type	Screw
Contact Material	Copper Alloy
Contact Type	Normally Open
Current Rating	6 Amps
Mounting Type	DIN Rail Mount
Brand	YWBL-WH
Operation Mode	Automatic
Coil Voltage	90 Volts
Contact Current Rating	6 Amps
Maximum Switching Current	6 Amps
Number of Terminals	2
UPC	703633820945
Manufacturer	YWBL-WH
Part Number	shgbwqe94u-03
Item Weight	3.98 ounces
Size	AD220
Finish	Finish
Material	ABS
Power Source	Powersource
Installation Method	InstallationMethod
Item Package Quantity	1
Spout Height	1 Centimeters
Measurement System	Imperial, Metric
Included Components	inc
Batteries Included?	No
Batteries Required?	No

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