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Protection Relays & Controls
Generator & Single-Function Protection–Frequency
G3000 Series
Frequency Relay
Description
The G3000 Frequency Relay is intended for frequency
monitoring on generators, busbars or other distribution
systems. The relay contains the functions “under frequency”
and “over frequency”, time delayed, and two individual output
relays—one relay for each function.
Basic adjustments can be done on the dials on the front
panels. More configuration options are available through PC
configuration via the optional G0100 Programming Kit. PC
programming enables the user to extend the ranges on the
dials on the front panel.
One version covers all system voltages from 63 Vac to
690 Vac. Rated voltage can be adjusted by a preset button
or PC configuration. Auxiliary supply voltage is 24 Vdc.
24 Vdc
+ –
RESET
Simplified Circuit Diagram
UNDER
FREQ.
OVER
FREQ.
Features & Benefits
G3000
(Frequency Relay)
L1
L2
L3
Ordering Information
Ordering Number
Control power
G3000.0010
24 Vdc
accessories
requirement
G0100
Optional
Accessories
G0100 Programming Kit
Connects to RS232 port. Includes blank frontplate labels and permanent pen for texting scales.
Features
BENEFITS
PC configuration
Over and under frequency protection
in one relay
User configurable scales and
setpoints
Suits broad variety of applications
63 Vac to 690 Vac systems can
be monitored by the same unit
Supports wide range of system voltages
Specifications
Supply
8-36 Vdc/0.75 W at 24 Vdc
Input Voltage
63-690 Vac ± 30%
Input Current
5 A CT, max. 10 A
Frequency35-75Hz
Trip Level
OF: 85 to 115% (max. 75 to 125%)
UF: 85 to 115% (max. 75 to 125%)
Delay
1-10 sec. (max. 1-360 sec.)
Relay Rating
380 Vac, 5 A, 1250 VA, 150 Vdc, 5 A, 120 W
Overfrequency Relay
Normal state: ND (NE)
Latching: Non-latching (latching)
Underfrequency Relay
Normal state: ND (NE)
Latching: Non-latching (latching)
Automatic (manually by terminal 11)
Reset
Accuracy
± 5%
Repeatability
± 1%
Serial LinkRJ11-modular
Operating Temperature –20°C to + 70°C
EMCEN50263
Burn-in
50 hours before final test
Enclosure Material
Polycarbonate. Flame retardant
Weight
0.3 kg
Dimensions
H 73 mm (2.87”); W 75 mm (2.95”);
D 114 mm (4.49”)
Installation
35 DIN rail or two 4 mm, (3/16”) screws
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© 2013 Littelfuse Protection Relays & Controls
Littelfuse.com/g3000
Rev: 4-A-050213