Transfer Switch Terminal - Generac Power Systems GR-210 Operation And Maintenance Manual

Liquid-cooled diesel engine generator set

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Table Of Contents

Table of Contents

CAUTION: Although you can operate single-

phase loads through the terminal lugs as well as

the receptacles, DO NOT attempt to connect any

3-phase loads to the receptacles.

• Wiring cables for connecting loads to terminal studs

must be rated 480 volts at 300 AC amperes (or

greater) for loads on E1, E2, E3, N and 240 volts at

700 AC amps (or greater) for loads on L1, L2 L3.

• When connecting electrical loads, be sure the volt-

age adjust dial is positioned to the correct voltage.

The dial permits you to adjust the voltage from

120/208 volts and 240/416 volts up to 139/240

volts and 277/480 volts.

CAUTION! Voltage adjust dial affects all recepta-

cles and terminals at the same time.

All receptacles and terminals are available at all

times and can be loaded at the same time. MAXI-

MUM TOTAL LOAD must not exceed generator rat-

ing.

Maximum load for single-phase or three-

phase operation must not exceed the rating for

that particular mode of operation (rating for sin-

gle-phase may be less than for three-phase opera-

tion).

The total load connected to any phase,

including loads connected to receptacles, must

not exceed the rated generator output per phase.

• Set voltage adjust dial to "120/208V" for 120 volts,

single-phase or 208 volts, 3-phase when connecting

for one of these voltages. See "Voltage Adjust Dial"

on page 12. Connect cord set leads as follows:

L1 to N = 120 volt, single-phase

L1 to L2 = 208 volt, 3-phase

L2 to N = 120 volt, single-phase

L2 to L3 = 208 volt, 3-phase

L3 to N = 120 volt, single-phase

L3 to L1 = 208 volt, 3-phase

• Set the voltage adjust dial to "139/240V" for 139

volt, single-phase or 240 volt, 3-phase when con-

necting for one of these voltages. See "Voltage Adjust

Dial" on page 12.Then connect cord set leads as

follows:

L1 to N = 139 volt, single-phase

L1 to L2 = 240 volt, 3-phase

L2 to N = 139 volt, single-phase

L2 to L3 = 240 volt, 3-phase

L3 to N = 139 volt, single-phase

L3 to L1 = 240 volt, 3-phase

WARNING! With voltage set line-to-line for 240V,

line-to-neutral voltage will be 139V at

receptacles.

NOTE:

General Information

GR-210 Generator Set

• Set the voltage adjust dial to "240/416V" for 240

volt, single-phase or 416 volt 3-phase when con-

necting for one of these voltages. See "Voltage Adjust

Dial" on page 12.Then connect cord set leads as

follows:

E1 to N = 240 volt, single-phase

E1 to E2 = 416 volt, 3-phase

E2 to N = 240 volt, single-phase

E2 to E3 = 416 volt, 3-phase

E3 to N = 240 volt, single-phase

E3 to E1 = 416 volt, 3-phase

• Set the voltage adjust switch to "277/480V" for 277

volt, single-phase or 480 volt, 3-phase when con-

necting for one of these voltages. See "Voltage Adjust

Dial" on page 12.Then connect cord set leads as

follows:

E1 to N = 277 volt, single-phase

E1 to E2 = 480 volt, 3-phase

E2 to N = 277 volt, single-phase

E2 to E3 = 480 volt, 3-phase

E3 to N = 277 volt, single-phase

E3 to E1 = 480 volt, 3-phase

CAUTION: Do NOT connect E1 or E2 or E3 to L1

or L2 or L3. Damage to equipment, personal

injury or death may result.

DANGER: Connect cable leads to the power ter-

minal studs only when the engine is shut down.

The panel door is equipped with a push-button

safety interlock switch (Figure 9) that prevents

engine startup and operation while the door is

open. Opening the door while engine is run-

ning immediately shuts down the engine. The

switch is provided for your protection. Do not

attempt to bypass or disconnect it.