Generator Control
© 2015 Littelfuse Protection Relays & Controls
Basic
E7800 SERIES
Motorized Potentiometer
ORDERING
NUMBER
SUPPLY VOLTAGE) OUTPUT
OPTIONS
SPECIAL
FUNCTION
(VAC) (VDC)
E7800.0030 230 V 200Ω, 1 turn 1 RPM
E7800.0040 230 V 500Ω, 1 turn 1 RPM
E7800.0050 230 V 1kΩ, 1 turn 1 RPM
E7800.0060 230 V 2kΩ, 1 turn 1 RPM
E7800.0070 230 V 10kΩ, 1 turn 1 RPM
E7800.0080 230 V 5kΩ, 10 turn 2 RPM
E7800.0090 230 V 100Ω, 10 turn 2 RPM
E7800.0100 230 V 200Ω, 10 turn 2 RPM
E7800.0200 110/100 V 2kΩ, 1 turn 1 RPM
E7800.0210 110/100 V 10kΩ, 1turn 1 RPM
E7800.0220 24 V 5kΩ, 10 turn 2 RPM
E7800.0230 24 V 100Ω, 10 turn 2 RPM
E7800.0240 24 V 200Ω, 10 turn 2 RPM
E7800.0250 24 V 500Ω, 10 turn 2 RPM
E7800.0260 24 V 1kΩ, 10 turn 2 RPM
E7800.0270 24 V 2kΩ, 10 turn 2 RPM
E7800.0280 24 V 10kΩ, 10 turn 2 RPM
E7800.0290 110/100 V 5kΩ, 10 turn 2 RPM
E7800.0300 110/100 V 100Ω, 10 turn 2 RPM
E7800.0310 110/100 V 200Ω, 10 turn 2 RPM
E7800.0320 110/100 V 500Ω, 10 turn 2 RPM
E7800.0330 110/100 V 1kΩ, 10 turn 2 RPM
E7800.0340 110/100 V 2kΩ, 10 turn 2 RPM
E7800.0350 110/100 V 10kΩ, 10 turn 2 RPM
E7800.0360 230 V 5kΩ, 1 turn 2 RPM
E7800.0370 230 V 100Ω, 1 turn 2 RPM
E7800.0380 230 V 200Ω, 1turn 2 RPM
E7800.0390 230 V 500Ω, 1 turn 2 RPM
Description
The E7800 Motorized Potentiometer is typically used as an
interface between increase/decrease contacts and a device
requiring control/adjustments by an external potentiometer.
In generator control applications, the E7800 can be used as
speed trim of an electronic speed governor, interfacing the
synchronizer or the load sharer. It can also be used alone
for manual speed adjustment or speed trim of electronic
governors, or for remote control of generator voltage, power
factor and reactive load (E7800 connected to Automatic
Voltage Regulator (AVR)).
Ordering Information
Simplified Circuit Diagram
FEATURES BENEFITS
Wire-wound
potentiometer
Longer life expectation than carbon
potentiometers
Friction clutch Motor can turn potentiometer against end
position continuously, without damaging it
Resistance from 100 Ω
to 10 kΩ
Wide range of potentiometers suitable for
any governor or AVR
24 V DC version with
Adjustable RPM
Simple fine tuning possibility in regulation
applications
Built-in dust seal Long life expectation
Features & Benefits
www.littelfuse.com/e7800
M
POWER
SUPPLY
INCR
DEC
E7800
(Motorized Potentiometer)
Rev: 4-C-032515
Generator Control
© 2015 Littelfuse Protection Relays & Controls
Basic
E7800 SERIES
Specifications
Voltage range AC: 90-120%
DC: 75-125%
Consumption AC: 2.5 VA
DC: 2 W
Operating Temperature –15° C to +70° C
EMC CE according to
EN50081-1
EN50082-1
EN50081-2
EN50082-2
Approvals CE, RRR
Burn-in 50 hours before final test
Weight 0.35 kg
Dimensions H 96 mm (3.8”); W 96 mm (3.8”); D 80 mm (3.1”)
Panel cut out H 92 mm (3.6”); W 92 mm (3.6”)
ORDERING
NUMBER
SUPPLY VOLTAGE) OUTPUT
OPTIONS
SPECIAL
FUNCTION
(VAC) (VDC)
E7800.0400 230 V 1kΩ, 1 turn 2 RPM
E7800.0410 230 V 2kΩ, 1 turn 2 RPM
E7800.0420 230 V 10kΩ, 1 turn 2 RPM
E7800.0430 24 V 5kΩ, 1 turn 1 RPM
E7800.0440 24 V 100Ω, 1 turn 1 RPM
E7800.0450 24 V 200Ω, 1 turn 1 RPM
E7800.0460 24 V 500Ω, 1 turn 1 RPM
E7800.0470 24 V 1kΩ, 1 turn 1 RPM
E7800.0480 24 V 2kΩ, 1 turn 1 RPM
E7800.0490 24 V 10kΩ, 1 turn 1 RPM
E7800.0640 24 V 5kΩ, 1 turn 0.8 - 6 RPM
E7800.0650 24 V 100Ω, 1 turn 0.8 - 6 RPM
E7800.0660 24 V 200Ω, 1 turn 0.8 - 6 RPM
E7800.0670 24 V 500Ω, 1 turn 0.8 - 6 RPM
E7800.0680 24 V 1kΩ, 1 turn 0.8 - 6 RPM
E7800.0690 24 V 2kΩ, 1 turn 0.8 - 6 RPM
E7800.0700 24 V 10kΩ, 1 turn 0.8 - 6 RPM
E7800.0710 24 V 5kΩ, 10 turn 0.8 - 6 RPM
E7800.0720 24 V 100Ω,10 turn 0.8 - 6 RPM
E7800.0730 24 V 200Ω, 10 turn 0.8 - 6 RPM
E7800.0740 24 V 500Ω, 10 turn 0.8 - 6 RPM
E7800.0750 24 V 1kΩ, 10 turn 0.8 - 6 RPM
E7800.0760 24 V 2kΩ, 10 turn 0.8 - 6 RPM
E7800.0770 24 V 10kΩ, 10 turn 0.8 - 6 RPM
The E7800 cannot be used for both AC and DC. The unit must be specified to order. Other
voltages and combinations are available on request.
Rev: 4-C-032515
Ordering Information (cont.)
www.littelfuse.com/e7800
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Littelfuse:
E7800.0410 E7800.0720 E7800.0640 E7800.0010 E7800.0120 E7800.0050 E7800.0700 E7800.0710
E7800.0420 E7800.0770 E7800.0140 E7800.0730 E7800.0670 E7800.0080 E7800.0690 E7800.0360 E7800.0680
E7800.0740 E7800.0760 E7800.0750 E7800.0130 E7800.0660 E7800.0650 E7800.00
