Section 2 — Installation

Liquid-cooled 15, 20 and 25 kW Generators

2.8GENERATOR AC NEUTRAL

CONNECTIONS

The manufacturer uses an UNGROUNDED AC neu- tral. Grounding is recommended only at the main service entrance. If the neutral wire is grounded and one of the phase loads becomes grounded, the exces- sive current opens the load circuit breaker or col- lapses the generator field. The actual result depends on the electrical characteristics of the particular installed generator.

The HS Type transfer switch is controlled by the gen- erator circuit board via control wires 23 and 194. Wire 23 connects the relay driver output (collector of an NPN transistor) on the generator circuit board to the "low side" (Terminal 23) of the transfer relay coil in the transfer switch. Wire 194 connects positive battery voltage from the generator circuit board to the "high side" (Terminal 194) of the transfer relay coil in the transfer switch.

2.9AUTOMATIC TRANSFER SWITCH

(ATS MODE)

When this generator, along with an HS Type automat- ic transfer switch has been installed and connected, a circuit board in the generator control panel con- stantly monitors the utility voltage and controls the operation of the transfer switch.

To implement this mode of operation, Position 2 of the eight-position DIP switch, which is located on the generator circuit board (see Figure 3.2), must be in the OFF position. In ATS Mode utility voltage sensing, weekly exercising, and load transferring is under the control of the generator.

Should the utility voltage drop below a preset value, and remain at this low voltage for a preset amount of time, the generator cranks and starts. After the gen- erator starts, the transfer switch transfers the load circuits to the generator so the generator can power them. When the utility source voltage has been restored, the transfer switch re-transfers the load cir- cuits back to the utility source voltage and the gener- ator shuts down.

If generator wires 23 and 194 are not wired to

!the correct terminals in the transfer switch, the circuit board in the generator control panel will be damaged.

In order for the generator utility voltage sensing and battery charging functions to work, it is necessary to provide a 5 amp fused 240Vac utility source connec- tion from the transfer switch main N1 and N2 termi- nals to the generator control panel N1 and N2 termi- nals (See Figure 2.3).

Transfer Switch terminals N1 and N2 (also called Utility 1 and Utility 2) are the input utility AC power connections to the Transfer Switch. Transfer Switch terminals T1 and T2 (also called Load 1 and Load 2) are the transfer switch AC output power terminals that go to the load circuit distribution panel. Transfer Switch terminals E1 and E2 are the AC power termi- nals that come from the generator's main alternator.

Figure 2.3 - Connection Diagram (ATS Mode)

 

 

 

FROM UTILITY

 

 

 

 

 

 

 

 

MAIN LINE

 

 

 

 

 

 

 

 

CIRCUIT

 

 

 

 

 

 

 

 

BREAKER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OR FUSE

 

 

 

 

 

 

 

 

 

 

 

 

FUSE

 

N1 N2

 

 

 

N1

 

 

 

 

T1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N2

 

 

 

 

T2

 

 

 

FUSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TO LOAD

FEEDER CIRCUITS

LOAD

DISTRIBUTION

PANEL

GENERATOR

 

194

HS TYPE

23

 

TRANSFER

 

SWITCH

 

E1 E2

 

194

23

178

183

E1 E2

N2 N1

11

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Generac 005030-0, 005028-0, 005031-0 owner manual Generator AC Neutral Connections, Connection Diagram ATS Mode
Page 12 Page 14

005028-0, 005030-0, 005028-0, 005031-0 specifications

Generac's line of generator models, including the 005028-0, 005030-0, 005031-0, and their closely related variant 005028-0, represent a fusion of durability, technology, and user-centric design focused on providing reliable power solutions for residential and commercial applications.

The Generac 005028-0 model stands out with its robust construction and efficient performance. It features a powerful engine that ensures a steady supply of electricity, capable of handling essential appliances during power outages. The model incorporates Generac's patented TruePower technology, which offers clean and stable power, ensuring sensitive electronics are safe from fluctuations. This feature is particularly appealing for homeowners who rely on medical equipment or sophisticated devices that require consistent power quality.

On the other hand, the 005030-0 model takes performance up a notch by equipped with a larger fuel tank, allowing for extended runtime during outages. It also has a quieter operation compared to its counterparts, making it suitable for residential areas where noise levels are a concern. The model includes an intuitive user interface that simplifies operation, letting users monitor their generator’s status effortlessly.

Similarly, the 005031-0 model boasts enhanced technology via a fully automatic transfer switch. This feature enables seamless switching between utility power and generator power without user intervention, ensuring that homes and businesses remain powered even during unexpected power failures. Equipped with advanced safety features, this model ensures that the generator operates only when necessary, significantly extending its lifespan and maintaining efficiency.

Additionally, all these Generac models share a durable casing designed to withstand harsh weather conditions. They are engineered for easy maintenance, with oil and fuel access points conveniently located for user convenience. Furthermore, the models come with various options for fuel types, including propane and natural gas, providing users flexibility based on their needs.

In summary, Generac's 005028-0, 005030-0, and 005031-0 models are characterized by their reliable performance, advanced technology, and user-friendly features. These generators are perfect solutions for anyone seeking a dependable source of backup power, ensuring that essential equipment runs smoothly without interruptions, no matter the situation.
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