Westinghouse ST Switch Intelligent Automatic Portable Transfer Switch

Place on a hard, level surface to avoid tilting and causing fuel leakage; Keep a safe distance of at least 3 feet (approximately 0.9 meters) away from flammable materials such as hay, wood, and paint.

It is prohibited to place the generator on rainy, snowy, or damp ground. A temporary rain shelter (not enclosed) must be built to prevent rainwater from entering the generator and causing a short circuit.

Requirements for placement of transfer switch:

Only suitable for indoor use, placed in a dry, ventilated, away from water sources (such as kitchens, bathrooms) and flammable materials.

Do not place it in areas prone to water accumulation such as basements and low-lying areas to avoid equipment short circuits caused by floods or water leaks.

The placement height should be at least 1 foot (about 0.3 meters) above the ground to prevent moisture erosion on the ground.

2. Cable connection safety

Connection sequence: The power grid must be connected first, then the generator control cable, and finally the generator power line. It is forbidden to reverse the sequence.

Cable requirements:

Grid input extension cable: A grounded three core cable with no damage or aging is required, with a length not exceeding 30 feet (approximately 9.1 meters) and a core cross-sectional area of ≥ 1.5mm ².

Generator control/power cord: The total length should not exceed 50 feet (approximately 15.2 meters). If extension is required, Westinghouse original extension cords (model 3021225C is the power cord extension cord, STCORD25 is the control cable extension cord) must be used. Non original cables are prohibited.

Connection operation:

All connections must be made after the generator is turned off and cooled down, and the plug must be fully inserted into the interface and locked to avoid loosening and overheating.

After connection, check that the cables are not twisted or compressed, and keep them away from high-temperature components such as the generator exhaust pipe to prevent cable aging.

3. Safety of electrical loads

Load accounting rules:

Pure resistance load (light bulb, heater, rice cooker): total operating power ≤ 20A × 120V=2400W.

Inductive loads (motors: refrigerators, water pumps, air conditioners): starting power=operating power multiplied by multiple (small handheld devices multiplied by 1.2, large fixed devices multiplied by 3.5), total starting power ≤ 2400W.

Example: 1500W space heater (pure resistor)+700W refrigerator (starting power 700 × 3.5=2450W), total starting power 2450W>2400W, cannot be connected simultaneously; 1500W heater+500W furnace (starting power 500 × 1.2=600W), total starting power 2100W ≤ 2400W, can be connected simultaneously.

Taboo for load connection:

Prohibit the connection of electrical appliances with unknown power to avoid overload triggering circuit breaker tripping.

It is prohibited to simultaneously connect multiple large inductive loads (such as two air conditioners, one water pump+one air conditioner) to prevent excessive starting power.

When connecting electrical appliances, it is necessary to first turn off the electrical switch and then turn it on again to avoid arcing caused by load insertion and removal.

4. Emergency safety handling

Generator malfunction unable to start: Immediately disconnect the transfer switch from the generator, manually start the generator to troubleshoot (such as low fuel, low oil, spark plug malfunction), and reconnect after troubleshooting.

The transfer switch does not switch the power supply: check the status of the indicator light. If the red light is on after the power grid is cut off but the generator does not start, check the connection of the control cable; If the green light does not turn on after the generator is started, check the power cord connection and restart the transfer switch if necessary (unplug the power grid for 30 seconds and then reinsert it).

Fire/Leakage Emergency: Immediately shut down the generator, unplug all connecting wires of the transfer switch, and use ABE or BE class fire extinguishers to extinguish the fire (water is prohibited from extinguishing electrical fires); If electric shock occurs, immediately cut off the power and seek medical attention.

Operation process (setup+testing+daily use)

1. Initial process setup (required steps)

Generator preparation:

Place the generator in a safe outdoor location, check that the fuel (unleaded gasoline) and engine oil (four stroke engine oil that meets the requirements of the generator) levels are normal, and that the battery connection is secure.

Start the generator and test it to run normally independently. After confirming that there are no fault alarms, turn it off and cool it down to room temperature.

Switch connection:

Place the transfer switch in a dry indoor location, connect the grid power supply to the "grid power input port" of the transfer switch with a grounding extension wire, and the green grid indicator light will light up at this time.

Connect the generator control cable: Insert one end into the "Smart Switch Ready" interface of the generator and the other end into the "Control Cable Interface" of the conversion switch. You can hear the locking sound of the buckle.