Chamberlain BG770, BG790 General Product Information, Specifications, POWER, MOTOR, OVERLOAD PROTECTION, ELECTRICAL BOX, CONTROL CIRCUIT, LIMIT SWITCHES, POWER ON/OFF SWTICH

General Product Information 4

General Product Information

Specifications

Specifications are for both model BG770 and model BG790 unless otherwise noted.

POWER

Line voltage is designated by third suffix of gate part number. For amp draw, see motor nameplate.

-11; 115VAC, 1 Phase, 60Hz

-21; 230VAC, 1 Phase, 60Hz

-81; 208VAC, 1 Phase, 60Hz

-83; 208VAC, 3 Phase, 60Hz

-23; 230VAC, 3 Phase. 60Hz

-43; 460VAC, 3 Phase, 60Hz

-53; 575VAC, 3 Phase, 60Hz

MOTOR

Squirrel cage induction type (3 phase) or capacitor start induction type (1 phase), continuous duty, 1725 RPM. Horsepower is designated by second suffix of operator part number.

-50; 1/2 Horsepower

MODEL BG770

TYPICAL

INSTALLATION

17” 17”

		44”
Up to 12 ft.	35”

DIMENSIONS01-G0674F3

Figure 1

OVERLOAD PROTECTION

Automatic reset (3 phase operators) or manual reset (1 phase operators) thermal overload.

ELECTRICAL BOX

NEMA 1 general purpose painted steel enclosure, contains all motor control equipment. Enclosure removable from operator.

CONTROL CIRCUIT

Class II, 24VAC

LIMIT SWITCHES

Adjustable, driven limit switches, operate in class II circuit. Not affected by removal of motor.

POWER ON/OFF SWTICH

Enclosed toggle switch, HP rated.

MODEL BG790

TYPICAL

INSTALLATION

Counterweighted	17”
Wishbone Arm	22”
	17”
Up to 24 ft.	44”
	35”

DIMENSIONS01-G0674F4

Figure 2

Doc 01-G0674

Rev E