Download Download E7800 Datasheet

Generator Control
Basic
E7800 Series
Motorized Potentiometer
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)).
Simplified Circuit Diagram
Features & Benefits
POWER
SUPPLY
E7800
(Motorized Potentiometer)
INCR
M
DEC
Features
Wire-wound
potentiometer
BENEFITS
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
Ordering Information
Ordering
Number
Voltage
RPM
Potentiometer
E7800.00.xx
230 V-240 Vac
1.0 (50 Hz)
5 kΩ-1 turn
E7800.01.xx
220 V-240 Vac
2.0 (50 Hz)
5 kΩ-10 turn
E7800.02.xx
100 V-110 Vac
1.0 (50 Hz)
5 kΩ-1 turn
E7800.03.xx
24 Vac
2.0 (50 Hz)
5 kΩ-10 turn
E7800.04.xx
100 V-110 Vac
2.0 (50 Hz)
5 kΩ-10 turn
E7800.05.xx
220 V-240 Vac
2.0 (50 Hz)
5 kΩ-1 turn
E7800.09.xx
24 Vac
1.0 (50 Hz)
5 kΩ-1 turn
E7800.23.xx
24 Vdc
0.8-6 Adj.
5 kΩ-1 turn
E7800.24.xx
24 Vdc
0.8-6 Adj.
5 kΩ-10 turn
E7800.90.00
24 Vdc
0.8-6 Adj.
DC output voltage,
0-1.0 V (0-100%)
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 CSA, UL component recognition
50 hours before final test
Burn-in Weight 0.35 kg
H 96 mm (3.8”); W 96 mm (3.8”); D 80 mm (3.1”)
Dimensions Panel cut out H 92 mm (3.6”); W 92 mm (3.6”)
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.
Indicate potentiometer value by replacing “xx” with digits per this table.
Index
“xx”
00
01
02
03
Potentiometer
value
5 kΩ (standard)
100 Ω
200 Ω
500 Ω
Index
“xx”
04
05
06
Potentiometer
value
1 kΩ
2 kΩ
10 kΩ
www.BDTIC.com/littelfuse
© 2013 Littelfuse Protection Relays & Controls
www.littelfuse.com/e7800
Rev: 4-A-050313