Protection Relays & Controls
Protection Relays
Earth-Fault Protection–Solidly-Grounded Systems
T2800 SEriES
Earth-Fault Relay
Description
The T2800 Earth Fault Relay is part of the T-Line series with
modular units for protection, control and monitoring of
generators. The T2800 detects the magnitude of the current
and, if this exceeds the preset level (0.02-2 x I
N
), the pick-up
LED will indicate and the delay timer will be started. After the
preset time (0.1-10 sec.) has expired the output relay and the
corresponding LED will be activated, provided that the current
level was exceeded for the entire delay time. The T2800 has
a normally energized output relay. The relay is a latching relay
which can be reset or disabled.
Features & Benefits
Simplified Circuit Diagram
FEaTurES
Accepts high supply
voltage variation
bEnEFiTS
Ensures correct operation in spite of voltage
supply fluctuations (fulfils marine class
requirement)
12
13
SEC x 10
15
LATCHING
16
OFF
1
2
3
Visual indication of power,
Provides quick and concise status information
pick-up, and output trip
Direct line-line or line-
neutral voltage supply
(up to 690 Vac)
Wide range of combined
current and delay
settings
Galvanic isolated inputs
DIN-rail or screw- mount
& adjustment by
potentiometers
Simplifies design and installation.
No need for PTs
Enables versatile use as earth fault relay or
standard overcurrent relay. Combining more units
offers economic alternative to relays with inverse
time response.
Protects the unit against high AC voltage and
currents from the installation including spikes
18
I x 10
19
N
7
8
9
10
T2800
(Earth-Fault
Relay)
5
6
Easy installation
Ordering Information
OrdErinG numbEr
TErminalS
1-3
2-3
i
n
T2800.00
T2800.01
T2800.02
T2800.04
T2800.05
T2800.08
230 V
450 V
127 V
24V DC+AC
480 V
230 V
400 V
120 V
415 V
5A
5A
5A
5A
5A
1A
Other combinations and voltages are available on request.
0.02-0.2 x I
N
or 0.2-2 x I
N
0.1-1.0 sec. or 1.0-10 sec.
660 V
60-110%
Voltage 5 VA at U
N
Current 0.3 VA at I
N
Continuous Current
2 x I
N
Frequency Range
45-400 Hz
Output Relay
Normally energized, latching, resetable
Contact Rating
AC: 400 V, 5 A, 2000 VA
DC: 150 V, 5 A, 150 W
Overall Accuracy
±5%
Repeatability
±1%
Operating Temperature
–20°C to + 70°C
Dielectric Test
2500 V
EMC
CE according to EN50081-1, EN50082-1, EN50081-2,
EN50082-2
Approvals
Certified by major marine classification societies
Burn-in
50 hours before final test
Enclosure Material
Polycarbonate. Flame retardant
Weight
0.5 kg
Dimensions
H
70 mm (2.76”);
W
100 mm (3.94”);
D
115 mm (4.52”)
Installation
35 mm DIN rail or 4 mm (
3
/
16
”) screws
Specifications
Trip Level
Delay
Max. Voltage
Voltage Range
Consumption
© 2013 Littelfuse Protection Relays & Controls
Littelfuse.com/t2800
Rev: 4-A-050213
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