Littelfuse G3000 User Manual

Protection Relays & Controls

Generator & Single-Function Protection–Frequency

G3000 SERIES

Frequency Relay

Simplified Circuit Diagram

24 Vdc

+ –

UNDER

FREQ.

RESET

G3000

(Frequency Relay)

OVER
FREQ.

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.

Features & Benefits

FEATURES BENEFITS

PC configuration

User configurable scales and
setpoints

63 Vac to 690 Vac systems can
be monitored by the same unit

Over and under frequency protection
in one relay

Suits broad variety of applications

Supports wide range of system voltages

Ordering Information

ORDERING NUMBER CONTROL POWER

G3000.0010

ACCESSORIES REQUIREMENT

24 Vdc

G0100 Optional

Accessories

G0100 Programming Kit

Connects to RS232 port. Includes blank front­plate labels and permanent pen for texting scales.

L

1

L

2

L

3

Specifications

Supply 8-36 Vdc/0.75 W at 24 Vdc
Input Voltage
Input Current 5 A CT, max. 10 A
Frequency 35 -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)

Reset Automatic (manually by terminal 11)
Accuracy ± 5%
Repeatability ± 1%
Serial Link R J11-mo dul ar
Operating Temperature –20°C to + 70°C
EMC EN50263
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”);

Installation 35 DIN rail or two 4 mm, (

63-690 Vac ± 30%

D 114 mm (4.49”)

3

/16”) screws

© 2013 Littelfuse Protection Relays & Controls
Littelfuse.com/g3000

Rev: 4-A-050213